Restructuring Charges - Restructuring Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Charges/ (Benefits)	$ 42.9	$ 68.0	$ 35.3
Cash Payments	(68.4)
Other	(12.9)
Restructuring liability, ending balance	12.3
2021 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	50.7
Charges/ (Benefits)	42.9
Restructuring liability, ending balance		50.7
2021 Restructuring Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	50.7
Charges/ (Benefits)	13.6
Cash Payments	(63.9)
Other	1.0
Restructuring liability, ending balance	1.4	50.7
2021 Restructuring Plan | Facility consolidations
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	0.0
Charges/ (Benefits)	8.1
Cash Payments	0.0
Other	(8.1)
Restructuring liability, ending balance	0.0	0.0
2021 Restructuring Plan | Contract terminations and other
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	0.0
Charges/ (Benefits)	21.2
Cash Payments	(4.5)
Other	(5.8)
Restructuring liability, ending balance	$ 10.9	$ 0.0