Other Intangible Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

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 March 31, 2018				As of December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Intangible assets	$	652	$	262	$	647	$	253
Intangible liabilities	$	1,403	$	955	$	1,403	$	932

Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense

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

	Three Months Ended March 31,
	2018		2017
Amortization of intangible assets	$	9	$	9
Amortization of intangible liabilities	$	23	$	24

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 2018	$	25	$	67
2019	$	33	$	27
2020	$	33	$	26
2021	$	31	$	24
2022	$	31	$	23