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Other Noncurrent Liabilities and Deferred Credits (Tables)
 12 Months Ended
Dec. 31, 2018
Payables and Accruals [Abstract]  
Schedule of Other Noncurrent Liabilities and Deferred Credits
Other Noncurrent Liabilities and Deferred Credits
December 31,
2018
 
2017
Environmental remediation (U)
$
185

 
$
253

Income taxes (H)
146

 
162

Accrued compensation and retirement costs
195

 
218

Sale-leaseback financing obligation
119

 
—

Other
94

 
126

 
$
739

 
$
759