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Receivables, Net (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Receivables, Net    
Trade accounts receivable $ 915 $ 647
Unbilled receivables 541 556
Less allowances for doubtful accounts (9) (17)
Net trade accounts receivable 1,447 1,186
Other receivables 363 445
Receivables, net 1,810 1,631
Maximum available sale of the accounts receivables under factoring program 1,300 1,400
Amount of accounts receivable available for sale under the factoring program $ 227 $ 230