Debt and Financing - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 1,552.8	$ 1,554.5
Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	1,537.3	1,539.7
UST Loan | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	679.1	673.3
UST Loan | Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	645.3	636.5
Term Loan | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	586.0	590.9
Term Loan | Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	605.3	612.9
Lease financing obligations | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	221.7	223.8
Lease financing obligations | Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	220.7	223.7
Second A&R CDA | Reported Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	66.0	66.5
Second A&R CDA | Estimate of Fair Value Measurement [Member]
Debt Instrument [Line Items]
Long-term debt, fair value	$ 66.0	$ 66.6