Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Finance leases	$ 41.9	$ 43.4
Total debt, net of unamortized discount and deferred financing costs	306.8	461.3
Less: Amounts due within one year	(14.7)	(166.7)
Total long-term debt, net of unamortized discount and deferred financing costs	$ 292.1	294.6
Secured Debt
Debt Instrument [Line Items]
Effective interest rate (as a percent)	4.88%
Term Loan | Secured Debt
Debt Instrument [Line Items]
Long-term debt	$ 265.7	282.2
Unamortized deferred financing costs	(0.8)	(0.8)
Total senior debt	264.9	$ 281.4
2 1/4% Notes
Debt Instrument [Line Items]
Effective interest rate (as a percent)		5.80%
2 1/4% Notes | Convertible Debt
Debt Instrument [Line Items]
Long-term debt	0.0	$ 145.9
Unamortized deferred financing costs	0.0	(9.4)
Total convertible senior notes	$ 0.0	$ 136.5