2.2.0.25truefalse41107 - Disclosure - Postretirement Benefit Plans (Actuarial Assumptions Used to Determine the Net Expense Related to Postretirement Benefit Plans) (Details)truefalsefalse1falsefalsetruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Postretirement Benefit Costs [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_2010622http://www.sec.gov/CIK0000936468duration2010-01-01T00:00:002010-12-31T00:00:00falsefalsePostretirement Benefit Costs [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PostretirementBenefitCostsMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/2003/instancepurexbrli02falsefalsetruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Postretirement Benefit Costs [Member]
1/1/2009 - 12/31/2009
Duration_1_1_2009_To_12_31_200947http://www.sec.gov/CIK0000936468duration2009-01-01T00:00:002009-12-31T00:00:00falsefalsePostretirement Benefit Costs [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PostretirementBenefitCostsMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/2003/instancepurexbrli03falsefalsetruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Postretirement Benefit Costs [Member]
1/1/2008 - 12/31/2008
Duration_1_1_2008_To_12_31_200846http://www.sec.gov/CIK0000936468duration2008-01-01T00:00:002008-12-31T00:00:00falsefalsePostretirement Benefit Costs [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PostretirementBenefitCostsMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/2003/instancepurexbrli02false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.058750.05875falsefalsefalsefalsefalse2truetruefalse0.061250.06125falsefalsefalsefalsefalse3truetruefalse0.063750.06375falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe interest rate used to adjust for the time value of money.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j
falsefalse3false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssetsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1<
/Id>truetruefalse0.0850.085falsefalsefalsefalsefalse2truetruefalse0.0850.085falsefalsefalsefalsefalse3truetruefalse0.0850.085falsefalsefalsefalsefalseOtherus-types:percentItemTypepureAn assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j
falsefalse4false0us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.0450.045falsefalsefalsefalsefalse2truetruefalse0.0460.046falsefalsefalsefalsefalse<
/hasScenarios>3truetruefalse0.0470.047falsefalsefalsefalsefalseOtherus-types:percentItemTypepureExpected rate of compensation increases (for pay-related plans).Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j
falsefalse33Postretirement Benefit Plans (Actuarial Assumptions Used to Determine the Net Expense Related to Postretirement Benefit Plans) (Details) (Postretirement Benefit Costs [Member])UnKnownUnKnownUnKnownUnKnowntruetrue
