2.2.0.25truefalse41703 - Disclosure - Stockholders' Equity (Equity and Governance Structure) (Details)truefalsefalse1falsefalsetruefalse{ma_HoldersOfEquityAxis} : Public Investors (Class A Stockholders) [Member] 1/1/2010 - 12/31/2010 Duration_1_1_2010_To_12_31_20106http://www.sec.gov/CIK0001141391duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePublic Investors (Class A Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_PublicInvestorsClassStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instance< MeasureValue>purexbrli02falsefalsetruefalse{ma_HoldersOfEquityAxis} : Public Investors (Class A Stockholders) [Member] 1/1/2009 - 12/31/2009 Duration_1_1_2009_To_12_31_200925http://www.sec.gov/CIK0001141391duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePublic Investors (Class A Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_PublicInvestorsClassStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instance purexbrli01false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.mastercard.com/taxonomy/role/disclosurestockholdersequityequityandgovernancestructuredetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse1falsefalsetruefalse{ma_HoldersOfEquityAxis} : Public Investors (Class A Stockholders) [Member] 1/1/2010 - 12/31/2010 Duration_1_1_2010_To_12_31_20106http://www.sec.gov/CIK0001141391duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePublic Investors (Class A Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_PublicInvestorsClassStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instance< MeasureValue>purexbrli02falsefalsetruefalse{ma_HoldersOfEquityAxis} : Public Investors (Class A Stockholders) [Member] 1/1/2009 - 12/31/2009 Duration_1_1_2009_To_12_31_200925http://www.sec.gov/CIK0001141391duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePublic Investors (Class A Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_PublicInvestorsClassStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instance purexbrli0OthernaNo definition available.No authoritative reference available.falsefalse2false0ma_PercentOfEquityOwnershipmafalsenadurationPercent of Equity Ownershipfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.8350.835falsefalsefalsefalsefalse2truetruefalse0.7420.742falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent of Equity OwnershipNo authoritative reference available.falsefalse3false0ma_PercentOfGeneralVotingPowermafalsenadurationPercent of General Voting Powerfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.8910.891falsefalsefalsefalsefalse2truetruefalse0.8770.877falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent of General Voting PowerNo authoritative reference available.falsefal se4false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.mastercard.com/taxonomy/role/disclosurestockholdersequityequityandgovernancestructuredetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3false< LabelColumn>falsetruefalse{ma_HoldersOfEquityAxis} : Principal or Affiliate Members (Class B Stockholders) [Member] 1/1/2010 - 12/31/2010 Duration_1_1_2010_To_12_31_20105http://www.sec.gov/CIK0001141391duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePrincipal or Affiliate Members (Class B Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_PrincipalOrAffiliateMembersClassBStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/200 3/instancepurexbrli04falsefalsetruefalse{ma_HoldersOfEquityAxis} : Principal or Affiliate Members (Class B Stockholders) [Member] 1/1/2009 - 12/31/2009 Duration_1_1_2009_To_12_31_200924http://www.sec.gov/CIK0001141391duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePrincipal or Affiliate Members (Class B Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_PrincipalOrAffiliateMembersClassBStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/20 03/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse5false0ma_PercentOfEquityOwnershipmafalsenadurationPercent of Equity Ownershipfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.0630.063falsefalsefalsefalse false2truetruefalse0.1540.154falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent of Equity OwnershipNo authoritative reference available.falsefalse6false 0ma_PercentOfGeneralVotingPowermafalsenadurationPercent of General Voting Powerfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse00falsefalsefalsefalsefalse2truetruefalse00falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent of General Voting PowerNo authoritative refe rence available.falsefalse7false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.mastercard.com/taxonomy/role/disclosurestockholdersequityequityandgovernancestructuredetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse5falsefalsetruefalse{ma_HoldersOfEquityAxis} : Foundation (Class A Stockholders) [Member] 1/1/2010 - 12/31/2010 Duration_1_1_2010_To_12_31_201042http://www.sec.gov/CIK0001141391duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseFoundation (Class A Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_FoundationClassStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instancepurexbrli06falsefalsetruefalse{ma_HoldersOfEquityAxis} : Foundation (Class A Stockholders) [Member] 1/1/2009 - 12/31/2009 Duration_1_1_2009_To_12_31_200923http://www.sec.gov/CIK0001141391duration2009-01-01T00:00:002009-12-31T00:00:00falsefalseFoundation (Class A Stockholders) [Member]ma_HoldersOfEquityAxisxbrldihttp://xbrl.org/2006/xbrldima_FoundationClassStockholdersMemberma_HoldersOfEquityAxisexplicitMemberUnit13Standardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse8false0ma_PercentOfEquityOwnershipmafalsenadurationPercent of Equity Ownershipfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.1020.102falsefalsefalsefalsefalse2truetruefalse0.1040.104falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent of Equity OwnershipNo authoritative reference available.falsefalse9false0ma_PercentOfGeneralVotingPowermafalsenadurationPercent of General Voting Powerfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.1090.109falsefalsefalsefalsefalse2truetruefalse0.1230.123falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercent of General Voting PowerNo authoritative reference available.falsefalse29Stockholders' Equity (Equity and Governance Structure) (Details)UnKnownUnKnownUnKnownUnKnowntruetrue