Goodwill and Other Intangible Assets and Liablities (Tables)

12 Months Ended

Dec. 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 December 31, 2018				As of December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Intangible assets	$	652	$	279	$	647	$	253
Intangible liabilities	$	1,403	$	1,022	$	1,403	$	932

Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense

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

	December 31, 2018		December 31, 2017		December 31, 2016
Amortization of intangible assets	$	36	$	36	$	39
Amortization of intangible liabilities	$	90	$	96	$	100

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):

	2019		2020		2021		2022		2023
Amortization of intangible assets	$	36	$	36	$	33	$	31	$	31
Amortization of intangible liabilities	$	27	$	26	$	24	$	23	$	21