Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax (benefit) provision of changes in pension and post-retirement plan assets and benefit obligations recorded to AOCI	$ 12.7	$ 29.9	$ (13.5)
Unrealized tax asset on related tax loss	91.4	106.4
Valuation allowance against U.S. and non-U.S. deferred tax assets	8.3	35.1
Total valuation allowance	99.7	141.5
Increase in total amount of unrecognized tax benefits that would impact effective tax rate	30.3	33.5	32.6
Interest expense and penalties, related to unrecognized tax benefits	(0.1)	(2.6)	$ 0.5
Unrecognized tax benefits, income tax penalties and interest accrued	4.8	$ 4.9
Change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 7.5