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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Tax Disclosure [Abstract]        
Income tax (expense) benefit $ (83.8) $ (56.9) $ (237.2) $ (157.1)
Effective income tax rate reconciliation, percent 23.90% 22.70% 23.50% 22.20%