Long-term Debt - Interest Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Interest expense	$ (161.6)	$ (136.6)
Interest income	0.5	0.2
Capitalized interest	0.3	0.7
Interest expense, net	(160.8)	(135.7)
2.75% Convertible Notes due 2026 \| Convertible Notes
Debt Instrument [Line Items]
Coupon interest	2.3	2.3
Amortization of debt discount	0.0	3.1
Amortization of debt issuance costs	0.4	0.2
Convertible Notes interest expense	$ 2.7	$ 5.6

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