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Income Taxes, Provision for Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
U.S. Federal [Abstract] |  |  |
Current | $ 16.4 | $ 38.2 | $ 39.8
Noncurrent Federal Tax Expense | 0.0 | 0.7 | 35.7
Deferred | 3.8 | (12.9) | (20.1)
Total U.S. Federal | 20.2 | 26.0 | 55.4
State and Local [Abstract] |  |  |
Current | 12.5 | 15.1 | 12.5
Noncurrent State and Local Tax Expense (Benefit) | 0.0 | 0.0 | 7.5
Deferred | 0.2 | (7.0) | (5.0)
Total State and Local | 12.7 | 8.1 | 15.0
International [Abstract] |  |  |
Current | 103.7 | 156.9 | 145.3
Deferred | (29.7) | (31.3) | (1.4)
Total International | 74.0 | 125.6 | 143.9
Total provision for income taxes | $ 106.9 | $ 159.7 | $ 214.3
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 | $ 2.9 | $ (0.3) | $ 22.2

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