Significant Transactions - NSM (Details) - USD ($) $ in Millions		12 Months Ended
	Aug. 01, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Significant Noncash Transactions [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]		Net gain (loss) from sale of discontinued operations, net of tax
Net gain (loss) from foreign currency translation from sale of discontinued operations, net of tax - NSM Group		$ 2.9	$ 0.0	$ 0.0
NSM
Other Significant Noncash Transactions [Line Items]
Net gain (loss) from sale of discontinued operations, net of tax		$ 886.8	$ 0.0	$ 0.0
Discontinued Operations, Disposed of by Sale | NSM
Other Significant Noncash Transactions [Line Items]
Disposal group, consideration	$ 1,400.0
Gain (loss) on assets held for sale	875.7
Net gain (loss) from sale of discontinued operations, net of tax	886.8
Net gain (loss) from foreign currency translation from sale of discontinued operations, net of tax - NSM Group	2.9
Compensation and other costs	$ 14.0