Other Expense (Income) - Restructuring and Related Charges (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Jul. 31, 2020	Feb. 28, 2018	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Charges			$ 1.0	$ 0.0	$ 2.2	$ 0.0
2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, period of implementation	24 months
Restructuring and related cost, cumulative cost incurred	$ 6.8
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020					4.6
Charges					2.2
Cash payments					(1.6)
Balance, June 30, 2021			5.2		5.2
2020 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020					4.6
Charges					1.0
Cash payments					(1.1)
Balance, June 30, 2021			4.5		4.5
2020 Restructuring Plan | Asset-related charges
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020					0.0
Charges					0.0
Cash payments					0.0
Balance, June 30, 2021			0.0		0.0
2020 Restructuring Plan | Other charges
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020					0.0
Charges					1.2
Cash payments					(0.5)
Balance, June 30, 2021			0.7		0.7
2020 Restructuring Plan | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	15.0
2020 Restructuring Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 17.0
2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
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
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020					0.1
Cash payments					(0.1)
Balance, June 30, 2021			0.0		0.0
2018 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020					0.1
Cash payments					(0.1)
Balance, June 30, 2021			$ 0.0		$ 0.0