Acquisitions and Divestitures - Pro Forma (Details) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2017 product	Dec. 31, 2016 USD ($) product	Jun. 27, 2015 USD ($) product
Business Combinations [Abstract]
Business combination, number of products purchased | product		3	2	2
Net sales from acquisitions	$ 51.0		$ 85.3	$ 418.2
Operating income from acquisitions	20.6		45.1	18.9
Net sales	2,748.8		5,288.6	5,682.5
Net income (loss)	$ 81.0		$ (4,011.0)	$ 250.2