Revenues from Contracts (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,366.1	$ 1,354.5	$ 4,021.8	$ 3,972.0
Software and related services
Disaggregation of Revenue [Line Items]
Net revenues	714.8	637.3	2,038.8	1,808.8
Engineered products and related services
Disaggregation of Revenue [Line Items]
Net revenues	$ 651.3	$ 717.2	$ 1,983.0	$ 2,163.2