Other Expense Restructuring and Related Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Deferred income	$ 30.9		$ 30.9			$ 33.4
Argentina currency devaluation	1.0	$ 1.1	1.0	$ 1.1
Payments to acquire property, plant, and equipment			88.8	74.7
Restructuring and related charges	1.8	1.2	3.8	6.7
Restructuring Reserve [Roll Forward]
Non-cash asset-write-downs			(1.6)	(0.8)
Severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2018			2.3
Charges			2.2
Cash payments			(2.0)
Non-cash asset-write-downs			0.0
Balance, September 30, 2019	2.5		2.5
Asset-related charges [Member]
Restructuring Reserve [Roll Forward]
Cash payments			0.0
Other charges [Member]
Restructuring Reserve [Roll Forward]
Cash payments			0.0
2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, cumulative cost incurred	12.6		12.6
Severance charges	0.6	0.1	2.2	3.4
Asset impairment charges, equipment	0.1	0.4	0.1	0.8
Other charges	1.1	0.7	1.5	2.5
Restructuring and related charges	1.8		3.8
Restructuring Reserve [Roll Forward]
Balance, December 31, 2018			2.3
Charges		$ 1.2	3.8	$ 6.7
Cash payments			(2.0)
Non-cash asset-write-downs			(1.6)
Balance, September 30, 2019	2.5		2.5
2018 Restructuring Plan [Member] | Asset-related charges [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2018			0.0
Charges			0.1
Non-cash asset-write-downs			(0.1)
Balance, September 30, 2019	0.0		0.0
2018 Restructuring Plan [Member] | Other charges [Member]
Restructuring Reserve [Roll Forward]
Balance, December 31, 2018			0.0
Charges			1.5
Non-cash asset-write-downs			(1.5)
Balance, September 30, 2019	0.0		0.0
2018 Restructuring Plan [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost					$ 16.0
2016 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance, September 30, 2019	$ 0.2		$ 0.2