Basis of Presentation and Accounting Policies (Details) - USD ($) $ in Millions	Jan. 01, 2023	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity		$ (2,437.6)	$ (2,850.0)	$ (4,007.7)	$ (4,151.2)	$ (4,306.2)	$ (4,563.4)
Retained earnings		$ 1,455.6		$ 1,762.5
Minimum | Forecast | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	$ 1,000.0
Retained earnings	175.0
Maximum | Forecast | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	1,100.0
Retained earnings	$ 275.0