Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Mar. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ (1,133.8)		$ (1,027.8)
OCI before reclassifications	13.8		19.2
Amounts reclassified from AOCI	24.5		16.4
Net current-period OCI	38.3		35.6
Ending balance	(1,095.5)		(992.2)
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	11.1		17.3
OCI before reclassifications	5.2		6.9
Amounts reclassified from AOCI	0.0		0.0
Net current-period OCI	5.2		6.9
Ending balance	16.3		24.2
Post- retirement benefit plans [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,005.8)		(954.5)
OCI before reclassifications	0.0		0.0
Amounts reclassified from AOCI	16.1	[1]	14.3	[2]
Net current-period OCI	16.1		14.3
Ending balance	(989.7)		(940.2)
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	(73.9)		(53.5)
OCI before reclassifications	5.8		16.7
Amounts reclassified from AOCI	0.0	[3]	0.0	[4]
Net current-period OCI	5.8		16.7
Ending balance	(68.1)		(36.8)
Increase (Decrease) in Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	11.1		17.3
OCI before reclassifications	5.2		6.9
Amounts reclassified from AOCI	0.0	[3]	0.0	[4]
Net current-period OCI	5.2		6.9
Ending balance	16.3		24.2
Derivatives [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(4.8)		9.0
OCI before reclassifications	8.0		2.5
Amounts reclassified from AOCI	0.7	[5]	(2.3)	[6]
Net current-period OCI	8.7		0.2
Ending balance	3.9		9.2
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	(49.3)		(28.8)
OCI before reclassifications	0.0		0.0
Amounts reclassified from AOCI	7.7	[7]	4.4
Net current-period OCI	7.7		4.4
Ending balance	(41.6)		(24.4)
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 10).

[2] Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 10).

[3] No amounts were reclassified to earnings.

[4] No amounts were reclassified to earnings.

[5] Amounts related to derivatives are included in cost of goods sold or interest expense in the period or periods the hedged item affects earnings (see Note 8).

[6] Amounts related to derivatives are included in cost of goods sold in the period or periods the hedged item affects earnings (see Note 8).

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