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Receivables (Tables)
 3 Months Ended
Mar. 31, 2018
Receivables  
Schedule of receivables

 

 

 

 

 

 

 

 

 

March 31,

 

December 31,

($ in millions)

    

2018

    

2017

 

 

 

 

 

 

 

Trade accounts receivable

 

$

1,332

 

$

1,206

Unbilled receivables

 

 

429

 

 

147

Less allowance for doubtful accounts

 

 

(10)

 

 

(10)

Net trade accounts receivable

 

 

1,751

 

 

1,343

Other receivables

 

 

339

 

 

291

 

 

$

2,090

 

$

1,634