Pension and Other Postretirement Benefit Plans - Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension | U.S.
Actuarial gains (losses) recognized:
Reclassification adjustments	$ 3.9	$ 2.3
Actuarial gain (loss) arising during the period	42.5	(46.1)
Effect of settlements	0.4	0.3
Prior service credit recognized:
Reclassification adjustments	0.0	0.0
Prior service cost arising during the period	0.0	0.0
Translation adjustment	0.0	0.0
Pretax amounts recognized in other comprehensive (income) loss	46.8	(43.5)
Pension | Foreign
Actuarial gains (losses) recognized:
Reclassification adjustments	6.0	5.2
Actuarial gain (loss) arising during the period	40.1	(39.7)
Effect of settlements	0.1	13.0
Prior service credit recognized:
Reclassification adjustments	0.0	0.0
Prior service cost arising during the period	0.0	0.0
Translation adjustment	1.4	(3.6)
Pretax amounts recognized in other comprehensive (income) loss	47.6	(25.1)
Other Postretirement | U.S.
Actuarial gains (losses) recognized:
Reclassification adjustments	(1.1)	(1.6)
Actuarial gain (loss) arising during the period	3.5	(6.9)
Effect of settlements	0.0	0.0
Prior service credit recognized:
Reclassification adjustments	(0.1)	(0.2)
Prior service cost arising during the period	0.0	(0.4)
Translation adjustment	0.0	0.0
Pretax amounts recognized in other comprehensive (income) loss	2.3	(9.1)
Other Postretirement | Foreign
Actuarial gains (losses) recognized:
Reclassification adjustments	0.0	0.0
Actuarial gain (loss) arising during the period	2.4	(2.1)
Effect of settlements	0.0	0.0
Prior service credit recognized:
Reclassification adjustments	0.0	0.0
Prior service cost arising during the period	0.0	0.0
Translation adjustment	0.0	0.0
Pretax amounts recognized in other comprehensive (income) loss	$ 2.4	$ (2.1)