Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Line Items]
Income tax (benefit) expense			$ 474	$ 303	$ 513
Income before income taxes			177	1,011	878
Net discrete tax adjustments		$ 135	386	65	294
Federal and state tax on accelerated royalty income transaction			334	0	0
Increase in valuation allowance on tax losses in subsidiaries			150
Reduction to valuation allowance for foreign tax credits			98
Valuation allowance	$ 982	317	982	317
Deferred tax asset, tax credit carryforwards, foreign, net	403	637	403	637
Royalty income	$ 2,100		19	20	32
Royalty income period	12 years
Prepaid royalty income	$ 576	0	576	0
Intercompany sales, inventory	320
Deferred tax assets, inventory	70		70
Tax credit, foreign, amount	310
Income tax expense, release of valuation allowance	98
Net establishment (release) of valuation allowances		(88)
Discrete adjustments, other				18	5
Provisional tax expense, Tax Cuts and Jobs Act of 2017					299
Deferred tax assets, operating loss, capital loss, and tax credit carryforwards	611		611
Operating loss carryforwards, domestic	489		489
Operating loss carryforwards, state and local	59		59
Unrecognized tax benefits	82	71	82	71	52	$ 63
Unrecognized tax benefits that would impact effective tax rate	56		56
Income tax penalties and interest accrued	1		1
Unsettled unrecognized tax benefits that would require cash	6		6
Undistributed earnings of foreign subsidiaries	2,400		2,400
Amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries		80		80
Income tax cash payments, net			142	178	144
Transition tax obligation, amount			0	8	77
Foreign Tax Authority
Income Taxes [Line Items]
Valuation allowance	969	204	969	204
Tax credit carryforward, valuation allowance	3	103	3	103
Net establishment (release) of valuation allowances			(140)	5	(1)
Deferred tax assets, operating loss, capital loss, and tax credit carryforwards, subject to expiration	63		63
Venezuela
Income Taxes [Line Items]
Tax credit carryforward, valuation allowance		98		98
Domestic Tax Authority
Income Taxes [Line Items]
Net establishment (release) of valuation allowances			98	(25)	$ (5)
Tax credit carryforwards, foreign	406		406
Tax credit carryforwards, research	83		83
Domestic and State and Local Authority
Income Taxes [Line Items]
Valuation allowance	$ 13	$ 113	$ 13	$ 113