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LONG-TERM DEBT - Asset-based Revolving Credit Facility due 2023 (Details)
Jun. 14, 2018
USD ($)
Jun. 01, 2018
USD ($)
Sep. 30, 2019
USD ($)
May 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]          
Weighted average interest rate     6.70%   9.90%
Aggregate market value of debt     $ 6,000,000,000   $ 8,700,000,000
Line of Credit | Asset-based Revolving Credit Facility due 2023          
Debt Instrument [Line Items]          
Maximum borrowings provided under credit facility     450,000,000    
Revolving Credit Facility | Line of Credit | Asset-based Revolving Credit Facility due 2023          
Debt Instrument [Line Items]          
Maximum borrowings provided under credit facility     $ 450,000,000    
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023          
Debt Instrument [Line Items]          
Maximum borrowings provided under credit facility       $ 450,000,000.0  
Percentage of eligible accounts receivable 90.00%        
Percentage of qualified cash 100.00%        
Maximum increase in credit facility $ 150,000,000        
Borrowing capacity threshold   $ 40,000,000.0      
Percentage of aggregate commitments or borrowing base   10.00%      
Minimum fixed charge coverage ratio required for four consecutive quarters   1.00      
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023 | Minimum          
Debt Instrument [Line Items]          
Commitment fee percentage 0.25%        
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023 | Maximum          
Debt Instrument [Line Items]          
Commitment fee percentage 0.375%        
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023 | Eurodollar | Minimum          
Debt Instrument [Line Items]          
Interest rate 1.25%        
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023 | Eurodollar | Maximum          
Debt Instrument [Line Items]          
Interest rate 1.75%        
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023 | Base Rate | Minimum          
Debt Instrument [Line Items]          
Interest rate 0.25%        
Revolving Credit Facility | Subsidiary | Line of Credit | Asset-based Revolving Credit Facility due 2023 | Base Rate | Maximum          
Debt Instrument [Line Items]          
Interest rate 0.75%