Income Taxes Provision for Income Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	19.90%	18.60%	17.40%
Current Income Tax Expense (Benefit)	$ 181.8	$ 141.0	$ 110.1
Deferred Income Tax Expense (Benefit)	42.0	(25.1)	(5.1)
Income tax benefit	$ 223.8	$ 115.9	$ 105.0