Inventory Financing Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Inventory Financing Agreements [Line Items]
Accounts payable-inventory financing	$ 429.3	$ 498.0
Accounts Payable, Inventory Financing
Inventory Financing Agreements [Line Items]
Revolving Loan financing agreement	406.3	480.9
Other inventory financing agreements	23.0	17.1
Accounts payable-inventory financing	$ 429.3	$ 498.0