Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
U.S. federal income tax expense (benefit) at the statutory rate of 21%		$ 108.0	$ (239.0)	$ 37.0
Net establishment (release) of U.S. valuation allowances				98.0
Net foreign losses (income) with no tax due to valuation allowances		3.0	37.0	48.0
Goodwill impairment		0.0	34.0	0.0
Deferred tax impact of enacted tax rate and law changes		(61.0)	(18.0)	3.0
State income taxes, net of U.S. federal benefit		1.0	(17.0)	(1.0)
U.S. charges (benefits) related to foreign tax credits, R&D and foreign derived intangible deduction		(4.0)	(9.0)	(17.0)
Adjustment for foreign income taxed at different rates		24.0	7.0	16.0
Net establishment of uncertain tax positions		(6.0)	6.0	7.0
Federal and state tax on accelerated royalty income transaction		0.0	0.0	334.0
Other		9.0	(1.0)	5.0
United States and Foreign Tax Expense (Benefit)	$ 1.5	(267.0)	110.0	474.0
Foreign Tax Authority
Income Taxes [Line Items]
Net establishment (release) of U.S. valuation allowances	$ 325.0	(1.0)	0.0	140.0
Domestic Tax Authority
Income Taxes [Line Items]
Net establishment (release) of U.S. valuation allowances		(340.0)	$ 310.0	$ (98.0)
Deferred tax impact of enacted tax rate and law changes		$ 21.0