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Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
U.S. Federal statutory rate	$ 53.0	$ 63.0	$ 206.6
Foreign earnings subject to different tax rates	(137.3)	(130.7)	(152.7)
State and local income taxes, less federal income tax benefit	(7.7)	2.5	5.5
Research and development and miscellaneous tax credits	(5.7)	(5.4)	(5.7)
Tax on dividends, deemed dividends, and GILTI	41.9	37.0	24.6
Changes to unrecognized tax benefits	9.6	10.5	10.5
Nondeductible expenses	9.3	9.3	19.6
Change in valuation allowance	639.7	172.5	71.3
Exchange gains and losses	30.3	(18.4)	(12.0)
Impact of Switzerland tax incentives	(645.0)	(1,149.2)	0.0
Other	(139.0)	(110.4)	(22.5)
Total	(150.9)	(1,119.3)	145.2
GILTI provisions	18.1	25.5	17.8
Decrease related to deferred tax liabilities	$ 38.6	$ 120.0	$ 39.7

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