Other Expense (Income) - Restructuring and Related Charges (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended
	Jul. 31, 2020	Feb. 28, 2018	Mar. 31, 2021
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	$ 5.8
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020			$ 4.6
Charges			1.2
Cash payments			(0.1)
Balance, March 31, 2021			5.7
2020 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020			4.6
Charges			0.6
Cash payments			(0.1)
Balance, March 31, 2021			5.1
2020 Restructuring Plan | Other charges
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020			0.0
Charges			0.6
Cash payments			0.0
Balance, March 31, 2021			0.6
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
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020			0.1
Cash payments			(0.1)
Balance, March 31, 2021			0.0
2018 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Balance, December 31, 2020			0.1
Cash payments			(0.1)
Balance, March 31, 2021			$ 0.0
Minimum | 2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	15.0
Maximum | 2020 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 17.0