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Receivables, Net (Tables)
3 Months Ended
Mar. 31, 2020
Receivables, Net  
Schedule of receivables

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​

​

​

​

​

​

​

​

​

March 31,

​

December 31,

($ in millions)

​

2020

    

2019

​

​

​

​

​

​

​

Trade accounts receivable

​

$

865

​

$

647

Unbilled receivables

​

​

558

​

​

556

Less allowance for doubtful accounts

​

​

(6)

​

​

(17)

Net trade accounts receivable

​

​

1,417

​

​

1,186

Other receivables

​

​

445

​

​

445

​

​

$

1,862

​

$

1,631