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ACCOUNTS RECEIVABLE - NET
9 Months Ended
Sep. 30, 2019
Receivables [Abstract]  
Accounts Receivable - Net
Note 8. Accounts Receivable - Net
 
 
September 30, 2019
 
December 31, 2018
Trade
$
7,750

 
$
7,705

Less - Allowance for doubtful accounts
(167
)
 
(197
)
 
$
7,583

 
$
7,508


 
Trade receivables include $1,796 million and $1,543 million of unbilled balances under long-term contracts as of September 30, 2019 and December 31, 2018. These amounts are billed in accordance with the terms of the customer contracts to which they relate.