v2.4.1.9
Debt (Annual Debt Marturities) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Long-term Debt, Fiscal Year Maturity [Abstract]    
2015 $ 199us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths  
2016 205us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2017 562us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
2018 1,730us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour  
2019 1,217us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive  
Thereafter 7,393us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive  
Total debt, gross 11,306us-gaap_DebtInstrumentCarryingAmount  
Less: Discount 24us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet  
Debt and Capital Lease Obligations $ 11,282us-gaap_DebtAndCapitalLeaseObligations $ 11,112us-gaap_DebtAndCapitalLeaseObligations