Other Expense (Income) - Schedule of Restructuring and Related Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	$ 2.6
Non-cash asset write-downs	0.0	$ (2.3)	$ (2.2)
Restructuring , ending balance	7.8	2.6
2020 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	0.0
Charges	4.6
Cash payments	0.0
Restructuring , ending balance	4.6	0.0
2020 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	0.0
Charges	4.6
Cash payments	0.0
Restructuring , ending balance	4.6	0.0
2020 Restructuring Plan | Asset-related charges
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	0.0
Charges	0.0
Cash payments	0.0
Restructuring , ending balance	0.0	0.0
2020 Restructuring Plan | Other charges
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	0.0
Charges	0.0
Cash payments	0.0
Restructuring , ending balance	0.0	0.0
2018 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	1.4	2.3
Charges		4.9	0.3
Cash payments	(1.3)	(3.5)
Non-cash asset write-downs		(2.3)
Restructuring , ending balance	0.1	1.4	2.3
2018 Restructuring Plan | Severance and benefits
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	1.4	2.3
Charges		2.6
Cash payments	(1.3)	(3.5)
Non-cash asset write-downs		0.0
Restructuring , ending balance	0.1	1.4	2.3
2018 Restructuring Plan | Asset-related charges
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	0.0	0.0
Charges		0.3
Cash payments	0.0	0.0
Non-cash asset write-downs		(0.3)
Restructuring , ending balance	0.0	0.0	0.0
2018 Restructuring Plan | Other charges
Restructuring Reserve [Roll Forward]
Restructuring beginning balance	0.0	0.0
Charges		2.0
Cash payments	0.0	0.0
Non-cash asset write-downs		(2.0)
Restructuring , ending balance	$ 0.0	$ 0.0	$ 0.0