Equity (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following tables present changes in the accumulated balances for each component of other comprehensive income (loss) (in millions):

	Changes in Accumulated Other Comprehensive Income (Loss) by Component
	Foreign currency translation adjustments			Comprehensive income from equity method investment			Employee benefit plans adjustments			Total
Balance, as of December 31, 2018	$	(227	)	$	2		$	(90	)	$	(315	)
Other comprehensive income (loss)	7			(1		)	—			6
Income tax benefit (expense)	—			—			—			—
Net current period other comprehensive income (loss)	7			(1		)	—			6
Balance, as of June 30, 2019	$	(220	)	$	1		$	(90	)	$	(309	)

	Changes in Accumulated Other Comprehensive Income (Loss) by Component
	Foreign currency translation adjustments			Comprehensive income from equity method investment		Employee benefit plans adjustments			Total
Balance, as of March 31, 2019	$	(201	)	$	1	$	(90	)	$	(290	)
Other comprehensive income (loss)	(19		)	—		—			(19		)
Income tax benefit (expense)	—			—		—			—
Net current period other comprehensive income (loss)	(19		)	—		—			(19		)
Balance, as of June 30, 2019	$	(220	)	$	1	$	(90	)	$	(309	)

	Changes in Accumulated Other Comprehensive Income (Loss) by Component
	Foreign currency translation adjustments			Comprehensive income from equity method investment		Employee benefit plans adjustments			Total
Balance, as of December 31, 2017	$	(136	)	$	2	$	(89	)	$	(223	)
Other comprehensive income	(43		)	—		—			(43		)
Income tax benefit (expense)	1			—		—			1
Net current period other comprehensive income	(42		)	—		—			(42		)
Balance, as of June 30, 2018	$	(178	)	$	2	$	(89	)	$	(265	)

	Changes in Accumulated Other Comprehensive Income (Loss) by Component
	Foreign currency translation adjustments			Comprehensive income from equity method investment		Employee benefit plans adjustments			Total
Balance, as of March 31, 2018	$	(103	)	$	2	$	(89	)	$	(190	)
Other comprehensive income	(76		)	—		—			(76		)
Income tax benefit (expense)	1			—		—			1
Net current period other comprehensive income	(75		)	—		—			(75		)
Balance, as of June 30, 2018	$	(178	)	$	2	$	(89	)	$	(265	)