Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provisionally estimated net benefit related to U.S. 2017 Tax Reform		$ 12	$ 151
Write-down of net deferred tax liabilities	$ 0	$ 7	$ 334
U.S. statutory tax rate (as a percent)	21.00%	21.00%	35.00%
Estimated cost of a mandatory deemed repatriation of non-U.S. earnings	$ 0	$ (5)	$ 183
Reconciliation of statutory rate to effective income tax rate
Taxes computed at U.S. statutory rates	$ 132	$ 91	$ 206
U.S. statutory tax rate (as a percent)	21.00%	21.00%	35.00%
(Decreases) increases in taxes resulting from:
State Income Tax, net of Federal Tax	$ 1	$ 1	$ 2
State Income Tax, net of Federal Tax (as a percent)	0.20%	0.20%	0.30%
Subsidiaries' results subject to tax rates other than U.S. statutory rates	$ 32	$ 28	$ (31)
Subsidiaries' results subject to tax rates other than U.S. statutory rates (as a percent)	5.10%	6.50%	(5.30%)
Income from non-U.S. subsidiaries taxed at U.S. statutory rates, net of foreign tax credits	$ 2	$ 0	$ (16)
Income from non-U.S. subsidiaries taxed at U.S. statutory rates, net of foreign tax credits (as a percent)	0.30%	0.00%	(2.70%)
Foreign currency translation taxed at non-U.S. subsidiaries	$ (1)	$ (1)	$ (12)
Foreign currency translation taxed at non-U.S subsidiaries (as a percent)	(0.20%)	(0.20%)	(2.00%)
U.S. deferred tax rate change	$ 0	$ (7)	$ (334)
U.S. deferrd tax rate change (as a percent)	0.00%	(1.60%)	(56.60%)
Mandatory deemed repatriation of non-U.S. earnings	$ 0	$ (5)	$ 183
Mandatory deemed repatriation of non-U.S. earnings (as a percent)	0.00%	(1.20%)	31.00%
Prior year tax adjustments	$ 9	$ 11	$ 0
Prior year tax adjustments (as a percent)	1.40%	2.50%	0.00%
Valuation allowances	$ 21	$ (7)	$ 0
Valuation allowances (as a percent)	3.40%	(1.60%)	0.00%
Other, net	$ 0	$ (3)	$ (2)
Other, net (as a percent)	0.00%	(0.70%)	(0.40%)
Provision (benefit) for income taxes	$ 196	$ 108	$ (4)
Provision (benefit) for income taxes, Effective Income Tax Rate (as a percent)	31.20%	24.90%	(0.70%)
Prior year tax adjustments	$ 9	$ 11	$ 0
Valuation allowances	$ 21	$ (7)	$ 0