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Receivables, Net (Tables)
12 Months Ended
Dec. 31, 2022
Receivables, Net  
Schedule of receivables

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December 31,

($ in millions)

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2022

    

2021

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​

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​

​

​

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Trade accounts receivable

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$

1,373

​

$

1,304

Unbilled receivables

​

​

746

​

​

727

Less: Allowance for doubtful accounts

​

​

(12)

​

​

(9)

Net trade accounts receivable

​

​

2,107

​

​

2,022

Other receivables

​

​

487

​

​

538

​

​

$

2,594

​

$

2,560

​