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Receivables, Net (Tables)
3 Months Ended
Mar. 31, 2022
Receivables, Net  
Schedule of receivables

March 31,

December 31,

($ in millions)

2022

    

2021

Trade accounts receivable

$

1,664

$

1,304

Unbilled receivables

839

727

Less: Allowance for doubtful accounts

(8)

(9)

Net trade accounts receivable

2,495

2,022

Other receivables

633

538

$

3,128

$

2,560