Goodwill and Other Intangible Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2013

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

Schedule of Finite-Lived Intangible Assets and Liabilities

Amortized intangible assets and liabilities were as follows (in millions):

	As of June 30, 2013				As of December 31, 2012
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Amortized intangible assets	$	2,014	$	1,052	$	2,013	$	899
Amortized intangible liabilities	$	2,056	$	969	$	2,056	$	842

Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense

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

	Six Months Ended June 30,
	2013		2012
Amortization of intangible assets	$	153	$	153
Amortization of intangible liabilities	$	127	$	141

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
Remainder of 2013	$	153	$	125
2014	$	306	$	179
2015	$	54	$	115
2016	$	31	$	101
2017	$	31	$	96