Comprehensive Income (Loss) - Reclassifications from Accumulated Other Comprehensive Loss Amortization of Pension Plan Cost (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications before tax		$ 3.3	$ 3.3	$ 3.1
Income tax expense		0.9	1.1	0.9
Reclassifications, net of tax		2.4	2.2	2.2
Accumulated Defined Benefit Plans Adjustment, Net Actuarial loss
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications before tax	[1]	3.3	3.8	3.1
Translation Adjustments
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications before tax	[2]	$ 0.0	$ (0.5)	$ 0.0

[1] These accumulated other comprehensive loss components are included in the calculation of net periodic pension and other postretirement benefits plans income recognized in investment and other income, net, in the audited Consolidated Statements of Operations (see Note 7, Retirement Plans).

[2] Translation adjustment reclassification resulting from the liquidation of a foreign subsidiary is included in investment and other income, net in the audited Consolidated Statements of Operations.