Fair Value Measurements - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Assets:
Investments in rabbi trust	$ 27.5	$ 24.2
Cross-currency swap derivative contract
Assets:
Cross-currency swap derivative contract		5.9
Liabilities:
Other long-term liabilities	10.2
Carrying Amount
Assets:
Investments in rabbi trust	27.5	24.2
Liabilities:
Other debt	955.8	788.6
Carrying Amount | Convertible senior notes due 2028
Liabilities:
Convertible senior notes	492.5	489.7
Carrying Amount | Convertible senior notes due 2025
Liabilities:
Convertible senior notes	0.0	116.0
Carrying Amount | Cross-currency swap derivative contract
Assets:
Cross-currency swap derivative contract	0.0	5.9
Liabilities:
Other long-term liabilities	10.2	0.0
Fair Value
Assets:
Investments in rabbi trust	27.5	24.2
Liabilities:
Other debt	955.8	788.6
Fair Value | Convertible senior notes due 2028
Liabilities:
Convertible senior notes	481.2	450.0
Fair Value | Convertible senior notes due 2025
Liabilities:
Convertible senior notes	0.0	125.4
Fair Value | Cross-currency swap derivative contract
Assets:
Cross-currency swap derivative contract	0.0	5.9
Liabilities:
Other long-term liabilities	$ 10.2	$ 0.0