Impairment and Restructuring Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Impairment and Restructuring Charges
Property, plant and equipment	$ 16.0	$ 17.7
Intangible assets, net	36.4	35.6
Total impairment charges	52.4	53.3
Total impairment and restructuring charges	69.1	56.3
Cost of sales
Impairment and Restructuring Charges
Restructuring	12.8	1.6
Warehouse, delivery, selling, general and administrative expense
Impairment and Restructuring Charges
Restructuring	2.9	1.0
Depreciation expense
Impairment and Restructuring Charges
Restructuring		$ 0.4
Non-operating expense
Impairment and Restructuring Charges
Restructuring	$ 1.0