Significant Transactions - NSM (Details) - USD ($) $ in Millions		12 Months Ended
	Aug. 01, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Significant Noncash Transactions [Line Items]
Net gain (loss) from foreign currency translation from sale of discontinued operations, net of tax - NSM Group		$ 0.0	$ 0.0	$ 2.9
NSM
Other Significant Noncash Transactions [Line Items]
Net gain (loss) from sale of discontinued operations, net of tax - NSM Group		$ 0.0	$ 0.0	886.8
Discontinued Operations, Disposed of by Sale | NSM
Other Significant Noncash Transactions [Line Items]
Disposal group, consideration	$ 1,400.0
Net transaction gain	875.7
Net gain (loss) from sale of discontinued operations, net of tax - NSM Group	886.8			886.8
Net gain (loss) from foreign currency translation from sale of discontinued operations, net of tax - NSM Group	2.9			2.9
General and administrative expenses	$ 14.0			$ 126.8