Summary of Accounting Policies (Disaggregated Revenue) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,512.3	$ 1,462.8	$ 1,426.6	$ 1,376.1	$ 1,335.6	$ 1,198.2	$ 1,137.8	$ 1,182.6	$ 5,777.8	$ 4,854.2	$ 4,727.7
Software and related services
Disaggregation of Revenue [Line Items]
Net revenues									3,604.3	2,871.1	2,477.7
Engineered products and related services
Disaggregation of Revenue [Line Items]
Net revenues									$ 2,173.5	$ 1,983.1	$ 2,250.0