Condensed Consolidating Financial Information of Guarantor Subsidiaries - Narrative (Details) $ in Millions	Mar. 31, 2019 USD ($)
ABL Facility, Accounts Receivable Securitization Facility, and Other Agreements
Condensed Financial Statements, Captions [Line Items]
Line of credit facility, restricted payment capacity	$ 2,104
ABL Facility, Accounts Receivable Securitization Facility, and Other Agreements | URNA
Condensed Financial Statements, Captions [Line Items]
Line of credit facility, restricted payment capacity	$ 443
5 3/4 percent Senior Notes due 2024
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	5.75%