Goodwill and Other Intangible Assets and Liablities (Tables)

12 Months Ended

Dec. 31, 2014

Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]

Schedule of Finite-Lived Intangible Assets and Liabilities

Intangible assets and liabilities were as follows (in millions):

	As of December 31, 2014				As of December 31, 2013
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Intangible assets	$	2,031	$	1,519	$	2,030	$	1,209
Intangible liabilities	$	2,056	$	1,274	$	2,056	$	1,095

Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense

Amortization of intangible assets and liabilities was as follows (in millions):

	December 31, 2014		December 31, 2013
Amortization of intangible assets	$	310	$	310
Amortization of intangible liabilities	$	179	$	253

Schedule of Finite-Lived Intangible Assets and Liabilities, Future Amortization Expense

Amortization of intangible assets and liabilities for the next five years is expected to approximate the following (in millions):

	Amortization of intangible assets		Amortization of intangible liabilities
2015	$	56	$	115
2016	$	33	$	101
2017	$	33	$	96
2018	$	31	$	90
2019	$	31	$	27