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2.2.0.25truefalse31403 - Disclosure - Postemployment and Postretirement Benefits (Tables)truefalsefalse1falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Postretirement Plans [Member] 1/1/2010 - 12/31/2010 USD ($) $Duration_1_1_2010_To_12_31_201022http://www.sec.gov/CIK0001141391duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePostretirement Plans [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standar dhttp://www.xbrl.org/2003/iso4217USDiso42170Unit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2false0ma_ScheduleOfNetFundedStatusTableTextBlockmafalsenadurationSchedule of Net Funded Statusfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="88%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(in millions)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Change in benefit obligation</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Benefit obligation at beginning of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">60</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">60</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Service cost</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Interest cost</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Plan participants' contributions</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Actuarial (gain) loss</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(8</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Gross benefits paid</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr><td valign="top"> Enhanced termination benefits</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Projected benefit obligation at end of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">60</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">60</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Change in plan assets</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Employer contributions</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Plan participants' contributions</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Net benefits paid</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Fair value of plan assets at end of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Funded status</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr><td valign="top"> Projected benefit obligation</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(60</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(60</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Funded status at end of year</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(60</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(60</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Amounts recognized on the consolidated balance sheet consist of:</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Accrued expenses</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(3</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr><td valign="top"> Other liabilities, long-term</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(57</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(57</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(60</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(60</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Amounts recognized in accumulated other comprehensive income consist of:</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Net actuarial gain</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(15</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(14</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr><td valign="top"> Transition obligation</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(15</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(13</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Weighted-average assumptions used to determine end of year benefit obligation</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Discount rate</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.25</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.75</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr><td valign="top"> Rate of compensation increase</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.37</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.37</td> <td valign="bottom" nowrap="nowrap">% </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule of Net Funded StatusNo authoritative reference available.falsefalseSchedule of Funded Status3false0ma_ScheduleOfAssumedHe althCareCostTrendTextblockmafalsenadurationSchedule of Assumed Health Care Cost Trend.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <table border="0" cellspacing="0" cellpadding="0" width ="92%" align="center"> <tr><td width="85%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Health care cost trend rate assumed for next year</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.50</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.50</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr><td valign="top"> Rate to which the cost trend rate is expected to decline (the ultimate trend rate)</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.00</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Year that the rate reaches the ultimate trend rate</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2016</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2015</td> <td valign="bottom" nowrap="nowrap">  </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule of Assumed Health Care Cost Trend.No authoritative reference available.falsefalseSchedule of Assumed Health Care Cost Trend4false0ma_PensionDisclosureTextBlockmafalsenadurationPension Disclosurefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> <table border="0" cellspacing="0" cellpadding="0" width=" 92%" align="center"> <tr><td width="77%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2008</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="10" align="center">(in millions)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Service cost</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Interest cost</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Amortization of actuarial gain</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(1</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(1</td> <td valign="bottom" nowrap="nowrap">) </td></tr> <tr><td valign="top"> Enhanced termination benefits</td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Net periodic postretirement benefit cost</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">10</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPension DisclosureNo authoritative reference available.falsefalseNet Periodic Benefit Cost for Postretirement Plan5false0ma_ScheduleOfChangeInPlanAssetsTextBlockmafalsenadurationSchedule Of Change In Plan Assetsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="81%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2008</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="10" align="center">(in millions)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Current year actuarial (gain) loss</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(2</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(8</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Amortization of actuarial gain</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom" nowrap="nowrap"> </td> <td valign="bottom" nowrap="nowrap" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 1px solid;" valign="bottom"> </td> <td> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Total recognized in other comprehensive income (loss)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(1</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(8</td> <td valign="bottom" nowrap="nowrap">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr> <tr><td valign="top"> Total recognized in net periodic benefit cost and other comprehensive income (loss)</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">10</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr style="font-size: 1px;"><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td> <td valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td style="border-top: rgb(0,0,0) 3px double;" valign="bottom"> </td> <td> </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule Of Change In Plan AssetsNo authoritative reference available.falsefalseSchedule of Change in Plan Assets Postretirement Plan6false0ma_ScheduleOfAssumptionsUsedTableTextBlockmafal senadurationSchedule of Assumptions Usedfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00<div> <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="81%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2010</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2009</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td style="border-bottom: rgb(0,0,0) 1px solid;" valign="bottom" colspan="2" align="center">2008</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Discount rate</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.75</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.00</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td valign="bottom" nowrap="nowrap">% </td></tr> <tr><td valign="top"> Rate of compensation increase</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.37</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.37</td> <td valign="bottom" nowrap="nowrap">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5.37</td> <td valign="bottom" nowrap="nowrap">% </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule of Assumptions UsedNo authoritative reference available.falsefalseSchedule of Weighted-Average Assumptions Used in Net Periodic Postretirement Cost7false0ma_ScheduleOfHealthCareCostAssumptionsEffectsTextblockmafalsenadurationSchedule of Health Care Cost Assumptions Effects.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00< ;div> <table border="0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="75%"> </td> <td valign="bottom" width="11%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="11%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">1% increase</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">1% decrease</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(in millions)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> Effect on postretirement obligation</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right"> 6</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">  </td> <td valign="bottom" nowrap="nowrap">(5) </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule of Health Care Cost Assumptions Effects.No authoritative reference available.falsefalseSchedule of Health Care Cost Assumptions Effects8false0ma_ScheduleOfExpectedBenefitPaymentsTableTextBlockmafalsenadurationSchedule of Expected Benefit Paymentsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <table border= "0" cellspacing="0" cellpadding="0" width="92%" align="center"> <tr><td width="68%"> </td> <td valign="bottom" width="9%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="9%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="9%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Benefit Payments</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Expected Subsidy Receipts</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">Net Benefit Payments</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="10" align="center">(in millions)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#cceeff"><td valign="top"> 2011</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> 2012</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> 2013</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> 2014</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#cceeff"><td valign="top"> 2015</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> 2016 – 2020</td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td valign="bottom" nowrap="nowrap">  </td></tr></table> </div>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSchedule of Expected Benefit PaymentsNo authoritative reference available.falsefalseSchedule of Expected Benefit Payments for the Postretirement Plan17Postemployment and Postretirement Benefits (Tables) (Postretirement Plans [Member])UnKnownUnKnownUnKnownUnKnownfalsetrue