Restructuring - Restructuring Charges By Statement of Operations Account (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of restructuring and related costs
Restructuring Charges	$ 49.4	$ 59.4	$ 21.2
Cost of sales - services and software
Schedule of restructuring and related costs
Restructuring Charges	27.4	20.8	3.1
Cost of sales - systems
Schedule of restructuring and related costs
Restructuring Charges	1.8	4.7	1.4
Selling and administrative expense
Schedule of restructuring and related costs
Restructuring Charges	21.3	28.8	16.1
Research, development and engineering expense
Schedule of restructuring and related costs
Restructuring Charges	$ (1.1)	$ 5.1	$ 0.6