Revenue from Contract with Customer - Impact of Changes in Accounting Policy (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net	$ 852.2		$ 830.1
Total inventories	831.3		737.0
Deferred revenue	502.0		437.5
Deferred income taxes	285.5		287.1
Retained earnings	354.0		$ 399.0
Total net sales	1,064.2	$ 1,102.8
Cost of sales	(823.3)	(860.3)
Net income (loss)	(63.3)	$ (52.2)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net	(3.2)
Total inventories	11.5
Deferred revenue	13.1
Deferred income taxes	(0.8)
Retained earnings	(4.0)
Total net sales	0.9
Cost of sales	0.3
Net income (loss)	0.8
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net	849.0
Total inventories	842.8
Deferred revenue	515.1
Deferred income taxes	284.7
Retained earnings	$ 350.0