The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Recent Accounting Pronouncements and Other Developments (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jan. 01, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Decrease in additional paid-in capital	$ 4,598.8		$ 4,633.3
Increase in retained earnings	$ 3,760.1		$ 2,435.1
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Increase in retained earnings		$ 27.1
Cumulative Effect, Period of Adoption, Adjustment \| Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Decrease in additional paid-in capital		129.1
Increase in retained earnings		$ 27.1