Cost-Reduction Actions - Statement of Income Classifications (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	$ 5.1	$ 7.9	$ 13.6	$ 35.4
Cost of revenue - services
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	2.8	6.9	1.1	12.8
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	2.6	1.5	8.8	4.0
Research and development
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	0.4	0.1	2.1	0.2
Other (expense), net
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	$ (0.7)	$ (0.6)	$ 1.6	$ 18.4