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Debt and Credit Facilities - Convertible Notes (Details) $ / shares in Units, shares in Millions, $ in Millions			12 Months Ended
	Aug. 10, 2023 USD ($) tradingDay $ / shares shares	May 21, 2020 USD ($) $ / shares	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 01, 2025 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes due 2028			$ 0.0	$ 0.0	$ 500.2
Inducement expense related to exchange of convertible notes			$ 0.0	$ 0.0	28.5
Partial exchange of convertible notes due 2025 and partial unwind of capped call transactions. (Note 14)					$ 24.2
Convertible senior notes due 2028
Debt Instrument [Line Items]
Conversion ratio	0.0215942
Conversion price (in USD per share) \| $ / shares	$ 46.31
Convertible senior notes due 2028 \| Convertible Debt
Debt Instrument [Line Items]
Term loan	$ 65.2
Proceeds from issuance of convertible notes due 2028	$ 485.9
Interest rate	1.75%
Redemption price	100.00%
Threshold percentage of stock price trigger	130.00%
Convertible debt, trading days (in trading days) \| tradingDay	20
Convertible debt, consecutive trading days (in trading days) \| tradingDay	30
Effective interest rate			2.40%
1.750% Convertible Senior Notes Over Allotment Option \| Convertible Debt
Debt Instrument [Line Items]
Term loan	$ 500.2
2.375% convertible senior notes over allotment option \| Convertible Debt
Debt Instrument [Line Items]
Term loan		$ 67.5
Debt instrument, repurchased face amount						$ 116.3
Convertible senior notes due 2025
Debt Instrument [Line Items]
Conversion ratio		0.0475862
Conversion price (in USD per share) \| $ / shares		$ 21.01
Convertible senior notes due 2025 \| Convertible Debt
Debt Instrument [Line Items]
Term loan		$ 517.5
Proceeds from issuance of convertible notes due 2028		$ 502.6
Interest rate		2.375%
Debt conversion, principal amount	401.2
Converted amount, cash	$ 403.0
Converted debt, shares issued (in shares) \| shares	8.4
Inducement expense related to exchange of convertible notes	$ 28.5
Deferred debt issuance cost, writeoff	4.4
Partial exchange of convertible notes due 2025 and partial unwind of capped call transactions. (Note 14)	$ 24.1
Effective interest rate			3.00%