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Long-Term Debt - Summary (Details) - USD ($) $ in Millions | Dec. 31, 2021 | May 03, 2021 | Dec. 31, 2020 | Jul. 30, 2020 | Apr. 11, 2019 | Jun. 30, 2017
--- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |
Finance lease obligations | $ 364.6 |  | $ 281.2 |  |  |
Less: unamortized debt issuance costs | (16.5) |  | (16.3) |  |  |
Total debt | 2,938.8 |  | 2,856.8 |  |  |
Less: Current maturities | 60.4 |  | 64.4 |  |  |
Total long-term debt | 2,878.4 |  | 2,792.4 |  |  |
Notes payable and other secured loans |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | 145.0 |  | 137.5 |  |  |
Senior secured term loan | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | 1,530.7 |  | 1,539.4 |  |  |
Unamortized fair value discount | 3.0 |  | 3.7 |  |  |
Senior secured revolving credit facility | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | 0.0 |  | 0.0 |  |  |
6.750% senior unsecured notes due 2025 | Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 370.0 |  | 370.0 |  |  |
Debt instrument, stated rate (percent) | 6.75% | 6.75% |  |  |  | 6.75%
10.000% senior unsecured notes due 2027 | Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 545.0 |  | $ 545.0 |  |  |
Less: unamortized debt issuance costs |  |  |  | $ (1.0) |  |
Debt instrument, stated rate (percent) | 10.00% |  |  |  | 10.00% |

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