Share-Based Compensation - Fair Value Options Granted (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation
Stock options granted, fair value	$ 0.0	$ 0.0	$ 0.0
Intrinsic value of options exercised	187.6	150.7	0.2
Cash received for options exercised	2.8	$ 0.3	$ 0.0
Intrinsic value of exercisable options outstanding	$ 37.0
Stock Options
Share-based Compensation
Shares available for future grant (in shares)	1.1
Stock Options \| Minimum
Share-based Compensation
Stock vesting period	4 years
Stock options, expiration period	7 years
Stock Options \| Maximum
Share-based Compensation
Stock vesting period	5 years

Amount of cash inflow from exercise of option under share-based payment arrangement.

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