Other Intangible Assets and Liablities (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	$ 2,013		$ 2,013
Amortized intangible assets, accumulated amortization	746		593
Amortized intangible liabilities, gross carrying amount	2,056		2,056
Amortized intangible liabilities, accumulated amortization	701		560
Amortization of Intangible Assets	153	157
Amortization of Intangible Liabilities	141	147
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization of intangible assets, Remainder of 2012	153
Amortization of intangible liabilities, Remainder of 2012	141
Amortization of intangible assets, 2013	306
Amortization of intangible liabilities, 2013	252
Amortization of intangible assets, 2014	306
Amortization of intangible liabilities, 2014	179
Amortization of intangible assets, 2015	54
Amortization of intangible liabilities, 2015	115
Amortization of intangible assets, 2016	31
Amortization of intangible liabilities, 2016	$ 101