Restructuring - Schedule of Restructuring Reserve by Type of Cost (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2020
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			$ 5.7	$ 5.7
Charged to Earnings	$ 9.0	$ 2.2	3.0	12.3
Releases				(1.1)
Cash Payments				(12.3)
Restructuring reserve, ending balance	4.6			4.6
Restructuring Plan, 2018
Restructuring Reserve [Roll Forward]
Releases				(1.1)
Restructuring Plan, 2018 | Severance and related expense
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			4.2	4.2
Charged to Earnings	0.0	0.1	2.2	2.3
Releases				(0.8)
Cash Payments				(4.6)
Restructuring reserve, ending balance	1.1			1.1
Restructuring Plan, 2018 | Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			1.5	1.5
Charged to Earnings	0.2	0.5	0.1	0.8
Releases				(0.3)
Cash Payments				(1.9)
Restructuring reserve, ending balance	0.1			0.1
Restructuring Plan, Other | Severance and related expense
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0.0	0.0
Charged to Earnings	0.3	1.6	0.7	2.6
Releases				0.0
Cash Payments				(2.1)
Restructuring reserve, ending balance	0.5			0.5
Restructuring Plan, 2020 | Severance and related expense
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0.0	0.0
Charged to Earnings	5.9	0.0	0.0	5.9
Releases				0.0
Cash Payments				(3.4)
Restructuring reserve, ending balance	2.5			2.5
Restructuring Plan, 2020 | Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance			0.0	0.0
Charged to Earnings	0.7	$ 0.0	$ 0.0	0.7
Releases				0.0
Cash Payments				(0.3)
Restructuring reserve, ending balance	$ 0.4			$ 0.4