Income Taxes - Reconciliation of Unrecognized Tax Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of total amounts of unrecognized income tax benefits
Gross Unrecognized Tax Liabilities – opening balance	$ 73.1	$ 68.1	$ 75.1
Gross increases – tax positions in prior period	1.5	7.7	2.2
Gross decreases – tax positions in prior period	(8.8)	(0.4)	(8.0)
Gross increases – tax positions in current period	2.2	1.4	2.0
Settlements	(3.0)	(0.5)	(1.6)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities	0.0	0.0	1.6
Lapse of statute of limitations	(3.1)	(3.2)	(3.3)
Gross Unrecognized Tax Liabilities – ending balance	$ 61.8	$ 73.1	$ 68.1