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Income Taxes - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Feb. 13, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax [Line Items]
Tax benefit attributable to outside basis differences recognized as a result of legal entity restructuring			$ (165.8)
Deferred tax assets before valuation allowances for state NOLs		$ 471.9
Foreign tax credit		242.0	208.0	$ 239.0
Deferred tax assets that do not satisfy realization criteria		356.5	255.0
Increase (decrease) in valuation allowance		(101.8)
Undistributed earnings of foreign subsidiaries		3,800.0
Deferred tax liabilities, undistributed foreign earnings		18.6
Unrecognized tax benefits		413.5	391.4	$ 192.0
Unrecognized tax benefits that would affect our effective tax rate		283.9
Unrecognized tax benefits increase		22.1
Increase resulting from legal entity reorganizations		28.8
Reductions as a result of lapse of statute of limitations		6.7	2.0
Additional interest and penalties accrued		3.5	$ (0.5)
Liability for interest and penalties		6.8
Federal | Internal Revenue Service (IRS) | Subsequent Event
Income Tax [Line Items]
Closure of IRS audit, expected impact	$ 0.0
Capital Loss Carryforward
Income Tax [Line Items]
Current Federal, State and Local, Tax Expense		24.1
Foreign tax credit		9.8
Current Year Activities
Income Tax [Line Items]
Increase (decrease) in valuation allowance		96.7
Change In Forecasted Earnings in Foreign Jurisdictions
Income Tax [Line Items]
Increase (decrease) in valuation allowance		(6.0)
Foreign Currency Translation and Tax Rate Changes
Income Tax [Line Items]
Increase (decrease) in valuation allowance		$ (11.1)

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