Income Taxes - Reconciliation of the Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
A reconciliation of the provision (benefit) for income taxes
Statutory U.S. Federal tax rate (as a percent)	21.00%	35.00%	35.00%
Increase (decrease) in provision for income taxes due to:
Tax provision on pretax earnings (loss) from continuing operations at statutory U.S. Federal tax rate	$ 58	$ 96	$ 124
Non-U.S. tax rates	25	(29)	(22)
Global intangible low taxed income	32
U.S. Tax Cuts and Jobs Act: transition tax, net of foreign tax credits	(2)	2
Tax law changes	4	152	(3)
Change in valuation allowance: U.S. tax law change	(2)	(162)
Change in valuation allowance: other	(18)	(283)	3
Tax attribute expiration	6	330
Withholding tax, net	10	8	7
Non-deductible expenses	4	9	20
U.S. tax on intercompany dividends and interest	1	2	3
Tax exempt income	(2)	(3)	(2)
Intraperiod tax allocation			(8)
Tax credits and incentives	(23)	(37)	(19)
Changes in tax reserves	13	(18)	8
Mexico inflationary adjustment	8	13	6
Equity earnings	(13)	(13)	(9)
Intercompany financing	1	(4)	(5)
Other taxes based on income	7	10	11
Other items	(1)	(3)	5
Provision for income taxes	$ 108	$ 70	$ 119