Inventory Financing Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Inventory Financing Agreements [Line Items]
Accounts payable-inventory financing	$ 445.0	$ 580.4
Accounts Payable, Inventory Financing Collateralized [Member]
Inventory Financing Agreements [Line Items]
Other inventory financing agreements	1.0	3.0
Accounts Payable, Inventory Financing [Member]
Inventory Financing Agreements [Line Items]
Revolving Loan inventory financing agreement	427.2	558.3
Other inventory financing agreements	17.8	22.1
Accounts payable-inventory financing	$ 445.0	$ 580.4