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Debt Obligations - Trade Receivables Securitization Facility (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Trade receivables securitization facility, maximum borrowing base $ 300  
Short-term Debt 222 $ 282
Trade receivables securitization facility, collateral at period end $ 533 603
Federal Funds Rate | Secured Debt    
Debt Instrument [Line Items]    
Debt basis spread on variable rate 0.50%  
Trade Receivables Securitization Facility    
Debt Instrument [Line Items]    
Short-term Debt $ 212 $ 270