Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 153.9	$ 82.4	$ 733.5	$ 54.7
Income tax benefit resulting from net loss during the period				35.6
Income tax expense, conversion of entity				$ 90.3
Effective tax rate (percent)	22.00%	20.00%	24.00%	(47.00%)
Income taxes payable	$ 180.4		$ 180.4		$ 62.7

Effective Income Tax Rate Reconciliation, Conversion Of Entity, Amount

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes.

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