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Other Noncurrent Liabilities and Deferred Credits
 12 Months Ended
Dec. 31, 2017
Payables and Accruals [Abstract]  
Other Noncurrent Liabilities and Deferred Credits
Other Noncurrent Liabilities and Deferred Credits
 
December 31,
2017
2016
Environmental remediation (L)
$
253

$
260

Income taxes (Q)
162

154

Accrued compensation and retirement costs
218

216

Contingent payment related to an acquisition (F)
—

78

Other
126

162

 
$
759

$
870