Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		$ (991.7)	$ (1,223.6)
OCI before reclassifications		11.2	(5.1)
Amounts reclassified from AOCI		20.0	20.1
Net current-period OCI		31.2	15.0
Ending balance		(960.5)	(1,208.6)
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance		26.0	21.2
OCI before reclassifications		0.7	0.6
Amounts reclassified from AOCI		0.0	0.0
Net current-period OCI		0.7	0.6
Ending balance		26.7	21.8
Post- retirement benefit plans [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		(947.7)	(1,119.9)
OCI before reclassifications		0.0	0.0
Amounts reclassified from AOCI	[1]	14.5	16.5
Net current-period OCI		14.5	16.5
Ending balance		(933.2)	(1,103.4)
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance		0.0	0.0
OCI before reclassifications		0.0	0.0
Amounts reclassified from AOCI		0.0	0.0
Net current-period OCI		0.0	0.0
Ending balance		0.0	0.0
Currency translation adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		(64.9)	(55.5)
OCI before reclassifications		(7.5)	(5.4)
Amounts reclassified from AOCI	[2]	0.0	0.0
Net current-period OCI		(7.5)	(5.4)
Ending balance		(72.4)	(60.9)
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance		26.0	21.2
OCI before reclassifications		0.7	0.6
Amounts reclassified from AOCI	[2]	0.0	0.0
Net current-period OCI		0.7	0.6
Ending balance		26.7	21.8
Derivatives [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		5.1	2.1
OCI before reclassifications		18.7	0.3
Amounts reclassified from AOCI	[3]	(3.8)	(1.3)
Net current-period OCI		14.9	(1.0)
Ending balance		20.0	1.1
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance		0.0	0.0
OCI before reclassifications		0.0	0.0
Amounts reclassified from AOCI		0.0	0.0
Net current-period OCI		0.0	0.0
Ending balance		0.0	0.0
Accumulated Deferred Tax Asset Valuation Allowance [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance		15.8	(50.3)
OCI before reclassifications		0.0	0.0
Amounts reclassified from AOCI	[4]	9.3	4.9
Net current-period OCI		9.3	4.9
Ending balance		25.1	(45.4)
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance		0.0	0.0
OCI before reclassifications		0.0	0.0
Amounts reclassified from AOCI		0.0	0.0
Net current-period OCI		0.0	0.0
Ending balance		$ 0.0	$ 0.0

[1] Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 12).

[2] No amounts were reclassified to earnings.

[3] Amounts related to derivatives are included in sales, cost of goods sold or interest expense in the period or periods the hedged item affects earnings (see Note 9).

[4] Represents the net change in deferred tax asset valuation allowances on changes in AOCI balances between the balance sheet dates.