Other Expense (Income) - Restructuring and Related Charges (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2020	Feb. 28, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring and related charges:
Total restructuring and related charges			$ 4.5	$ 1.8	$ 4.5	$ 3.8
Severance and post-employment benefits			4.5	0.6	4.5	2.2
Asset-related charges			0.0	0.1	0.0	0.1
Other charges			0.0	1.1	0.0	1.5
2020 Restructuring Plan
Restructuring and related charges:
Restructuring and related activities, period of implementation	24 months
Restructuring and related cost, cumulative cost incurred	$ 4.5
Restructuring Reserve [Roll Forward]
Balance, December 31, 2019					0.0
Charges						4.5
Cash payments						0.0
Balance, September 30, 2020			4.5		4.5
2020 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Balance, December 31, 2019					0.0
Charges						4.5
Cash payments						0.0
Balance, September 30, 2020			4.5		4.5
2018 Restructuring Plan
Restructuring and related charges:
Restructuring and related activities, period of implementation		24 months
Restructuring and related cost, expected cost		$ 16.0
Restructuring and related cost, cumulative cost incurred			13.7		13.7
Total restructuring and related charges				1.8		3.8
Severance and post-employment benefits				0.6		2.2
Asset-related charges				0.1		0.1
Other charges				$ 1.1		$ 1.5
Restructuring Reserve [Roll Forward]
Balance, December 31, 2019					1.4
Cash payments					(1.2)
Balance, September 30, 2020			0.2		0.2
2018 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Balance, December 31, 2019					1.4
Cash payments					(1.2)
Balance, September 30, 2020			$ 0.2		$ 0.2
Minimum | 2020 Restructuring Plan
Restructuring and related charges:
Restructuring and related cost, expected cost	15.0
Maximum | 2020 Restructuring Plan
Restructuring and related charges:
Restructuring and related cost, expected cost	$ 17.0