Revenues from Contracts (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,305.0	$ 1,330.3	$ 2,655.7	$ 2,617.5
Software and related services
Disaggregation of Revenue [Line Items]
Net revenues	655.5	594.7	1,324.0	1,171.5
Engineered products and related services
Disaggregation of Revenue [Line Items]
Net revenues	$ 649.5	$ 735.6	$ 1,331.7	$ 1,446.0