Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2020	Dec. 31, 2018
Income Taxes [Line Items]
U.S. statutory rate				21.00%	21.00%	21.00%
Income tax (benefit) expense	$ 1.5			$ (267.0)	$ 110.0	$ 474.0
Other				9.0	(1.0)	5.0
Income (loss) before income taxes				513.0	(1,140.0)	177.0
Net discrete tax adjustments				409.0	305.0	386.0
Discrete adjustments, net charge					10.0
Valuation allowance	1,044.0			1,044.0	1,469.0
Deferred tax impact of enacted tax rate and law changes				(61.0)	(18.0)	3.0
Discrete adjustments, other		$ 1.0	$ 8.0
Federal and state tax on accelerated royalty income transaction				0.0	0.0	334.0
Increase in valuation allowance on tax losses in subsidiaries						150.0
Net establishment (release) of U.S. valuation allowances						98.0
Net deferred tax assets	2,288.0			2,288.0	1,879.0
Deferred tax asset, tax credit carryforwards, foreign	339.0			339.0	133.0
Deferred tax assets	3,332.0			3,332.0	3,348.0
Federal tax charges	315.0			1.0	(5.0)	0.0
Tax loss carryforwards	1,274.0			1,274.0	1,570.0
Deferred tax assets tax credit carryforwards foreign tax credits loss	110.0			110.0
Operating loss carryforwards, domestic	444.0			444.0
Operating loss carryforwards, state and local	82.0			82.0
Tax credit carryforwards, research	105.0			105.0
Unrecognized tax benefits	90.0			90.0	85.0	82.0		$ 71.0
Unrecognized tax benefits that would impact effective tax rate	61.0			61.0
Income tax penalties and interest accrued	2.0			2.0
Unsettled unrecognized tax benefits that would require cash	15.0			15.0
Undistributed earnings of foreign subsidiaries	2,200.0			2,200.0
Amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries	100.0			100.0
Income tax cash payments, net				201.0	45.0	142.0
Foreign Tax Authority
Income Taxes [Line Items]
Tax credit carryforward, valuation allowance	3.0	340.0		3.0	328.0		$ 295.0
Valuation allowance	1,000.0			1,000.0	1,100.0
Net establishment (release) of U.S. valuation allowances	325.0			(1.0)	0.0	140.0
Net deferred tax assets	1,300.0			1,300.0	1,300.0
Deferred tax asset, tax credit carryforwards, foreign	339.0			$ 339.0
Tax credit carryforward expiration period				2030 to 2041
Deferred tax assets, operating loss, capital loss, and tax credit carryforwards	748.0			$ 748.0
Domestic Tax Authority
Income Taxes [Line Items]
Valuation allowance					15.0
Deferred tax impact of enacted tax rate and law changes				21.0
Net establishment (release) of U.S. valuation allowances				$ (340.0)	310.0	$ (98.0)
Tax credit carryforward expiration period				2023 to 2030
Domestic and State and Local Authority
Income Taxes [Line Items]
Valuation allowance	26.0			$ 26.0	368.0
Net deferred tax assets	1,200.0			$ 1,200.0	$ 1,200.0
Net deferred tax assets, expiration period				2022 to 2031
State and Local Authority
Income Taxes [Line Items]
Tax credit carryforward, valuation allowance	15.0			$ 15.0
Valuation allowance	26.0			$ 26.0
Tax credit carryforward expiration period				2022 to 2040
Operating loss carryforwards, domestic	205.0			$ 205.0
Unrecognized tax benefits	13.0			13.0
England
Income Taxes [Line Items]
Deferred tax impact of enacted tax rate and law changes			$ 13.0	39.0
BRAZIL
Income Taxes [Line Items]
Tax benefit related to a favorable court ruling		$ 8.0
Luxembourg | Foreign Tax Authority
Income Taxes [Line Items]
Valuation allowance	885.0			885.0
Europe
Income Taxes [Line Items]
Valuation allowance	1,018.0			1,018.0
Deferred tax assets, operating loss, capital loss, and tax credit carryforwards, subject to expiration	$ 61.0			$ 61.0