Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Amount of noncash expense for share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
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-SubTopic 10
-Topic 230
-Publisher FASB
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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-Topic 718
-SubTopic 10
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-Section 50
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Stock-based compensation - other information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Other information about options outstanding
Remaining expense to be recognized	$ 75.0		$ 75.0
Weighted average period over which remaining expense will be recognized (in years)			1 year 4 months 24 days
Stock-based compensation expense			$ 36.5	$ 35.1
Stock options \| Maximum
Other information about options outstanding
Award vesting period (in years)			3 years
RSUs
Other information about options outstanding
Stock-based compensation expense	$ 0.6	$ (5.4)	$ 0.4	$ 1.6
RSUs \| Minimum
Other information about options outstanding
Award vesting period (in years)			1 year
RSUs \| Maximum
Other information about options outstanding
Award vesting period (in years)			3 years