Inventory Financing Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Inventory Financing Agreements [Line Items]
Accounts payable-inventory financing	$ 500.0	$ 429.3
Accounts Payable, Inventory Financing
Inventory Financing Agreements [Line Items]
Revolving Loan inventory financing agreement	475.0	406.3
Other inventory financing agreements	$ 25.0	$ 23.0