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Income Taxes - Reconciliation of Expected Federal Income Tax Benefit to Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Expected income tax expense (benefit) at U.S. federal statutory rate | $ 77.7 | $ (388.9) | $ (29.9)
Changes in valuation allowance, income tax | (101.3) | 410.1 | (32.0)
Changes in tax reserves | 1.9 | (7.7) | 3.0
Excess depletion | (13.7) | (14.5) | (19.3)
Foreign earnings repatriation | 0.0 | 0.0 | 76.1
Foreign earnings provision differential | 17.3 | 16.4 | 45.6
Global intangible low-taxed income | 67.0 | 0.0 | 6.1
Tax credits | (26.5) | 0.0 | 0.0
Remeasurement of foreign income tax accounts | (1.8) | 2.9 | (0.1)
State income taxes, net of federal tax benefit | (1.1) | (6.8) | (13.2)
Other, net | 3.3 | (3.5) | 9.7
Total income tax provision | $ 22.8 | $ 8.0 | $ 46.0

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