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Income Taxes, Provision for Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
U.S. Federal [Abstract]      
Current $ 95.1 $ 16.4 $ 38.2
Noncurrent Federal Tax Expense 0.0 0.0 0.7
Deferred 29.1 3.8 (12.9)
Total U.S. Federal 124.2 20.2 26.0
State and Local [Abstract]      
Current 34.6 12.5 15.1
Noncurrent State and Local Tax Expense (Benefit) 0.0 0.0 0.0
Deferred 11.8 0.2 (7.0)
Total State and Local 46.4 12.7 8.1
International [Abstract]      
Current 156.0 103.7 156.9
Deferred (62.3) (29.7) (31.3)
Total International 93.7 74.0 125.6
Total provision for income taxes $ 264.3 $ 106.9 $ 159.7
U.S. federal income tax rate 21.00% 21.00% 21.00%
Increase or decrease in current tax expense from utilization of prior years' net operating loss carryovers $ 52.4 $ (2.9) $ 0.3