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Shareholders' Equity - Schedule of Treasury Shares (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Movement In Treasury Shares [Roll Forward]
Beginning balance	$ 219.5	$ 212.6	$ 207.3
Purchase of treasury shares	(3.1)	(2.3)	(2.7)
Utilization of treasury shares	(0.2)	0.0	(0.1)
Ending balance	226.4	219.5	212.6
Treasury shares
Movement In Treasury Shares [Roll Forward]
Beginning balance	(24.9)	(22.9)	(20.4)
Purchase of treasury shares	(3.1)	(2.3)	(2.7)
Utilization of treasury shares	0.4	0.3	0.2
Ending balance	$ (27.6)	$ (24.9)	$ (22.9)

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Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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