Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2017		Dec. 31, 2017
Valuation Allowance [Line Items]
Tax Credit Carryforward, Valuation Allowance	$ 200	$ 111	$ 111	$ 111	$ 189	$ 189		$ 189
Deferred Tax Assets, Net of Valuation Allowance, Current	$ 447	$ 195	195	$ 195
Effective income tax rate reconciliation [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%		21.00%	35.00%			21.00%
State income tax, net of federal tax benefit (in hundredths)	0.80%	1.00%			0.50%
Statutory rate differential attributable to foreign operations (in hundredths)	1.60%	(12.30%)			(9.30%)
Effective Income Tax Rate Reconciliation Adjustments To Reserves And Prior Years	4.20%	2.80%			0.50%
Change in valuation allowance (in hundredths)	(2.60%)	8.50%			1.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Percent	(16.10%)	0.00%			0.00%
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent	0	(0.019)			0.191
Other, net (in hundredths)	0.80%	(0.40%)			(1.10%)
Effective income tax rate (in hundredths)	5.70%	16.20%			41.10%
Share-based Payment Arrangement, Expense, Tax Benefit	$ (9)		(9)			(22)	[1]
Effective Income Tax Rate Reconciliation Share Based Compensation	(4.00%)	(2.50%)			(5.10%)
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Effective income tax rate	$ 79		297			934
Details of income tax provision (benefit) [Abstract]
Current: Federal	129		102			(2)
Current: Foreign	166		181			290
Current: State	16		25			12
Total current income tax provision (benefit)	311		308			300
Deferred: Federal	(16)		(24)			603
Deferred: Foreign	(213)		5			19
Deferred: State	(3)		8			12
Total deferred income tax provision (benefit)	(232)		(11)			634
Effective income tax rate	79		297			934
U.S. and foreign income before income taxes [Abstract]
U.S.	466		726			662
Foreign	907		1,113			1,612
Income from Continuing Operations Before Income Taxes	1,373		1,839			2,274
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			$ 35			$ 434
State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Tax Credit Carryforward, Valuation Allowance	100
Foreign Tax Credit [Domain]
Valuation Allowance [Line Items]
Tax Credit Carryforward, Valuation Allowance	$ 100
Prior Year Divestiture [Member]
Effective income tax rate reconciliation [Abstract]
Effective Income Tax Rate Reconciliation Adjustments To Reserves And Prior Years		1900000000.00%

[1] Deferred tax benefit recognized does not reflect the impact of the Tax Act. See Note 17.