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Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
Schedule Of Accounts Receivable
Accounts receivable consist of the following at December 31:
 
 
2017
 
2016
Trade customers
 
$
974

 
$
820

Affiliates
 
9

 
8

Allowance for doubtful accounts
 
(22
)
 
(18
)
 
 
961

 
810

Federal and state taxes
 
7

 
90

Other
 
33

 
39

Accounts receivable, net
 
$
1,001

 
$
939