Condensed Consolidating Financial Information of Guarantor Subsidiaries - (Narrative) (Details) - ABL Facility $ in Millions	Dec. 31, 2019 USD ($)
Condensed Financial Statements, Captions [Line Items]
Line of credit facility, restricted payment capacity	$ 2,929
URNA
Condensed Financial Statements, Captions [Line Items]
Line of credit facility, restricted payment capacity	$ 674

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	srt_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration