Business Combinations - Consideration Paid and Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Summary of the aggregate consideration paid and the aggregate amounts of the assets acquired and liabilities assumed
Accounts receivable	$ 11.1	$ 3.9
Inventory	139.9	63.4
Other current assets	2.9	0.2
Property and equipment	21.8	12.1
Indefinite-lived intangibles	366.9	32.9
Other non-current assets	0.1	2.7
Current liabilities	(33.6)	(4.4)
Non-current liabilities	(3.2)	(4.8)
Total consideration	505.9	106.0
Consideration transferred through common stock issuance	(32.4)
Contingent consideration	(20.0)
Seller financed/assumed debt	(3.8)
Total cash used in acquisitions	$ 449.7	$ 106.0