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(Tables)
 12 Months Ended
Dec. 31, 2019
Other Assets, Noncurrent Disclosure [Abstract]  
Schedule of components of other noncurrent assets
Other noncurrent assets at December 31, 2019 and December 31, 2018 consisted of the following:
  December 31,
 20192018
Pension assets79  46  
Spare parts inventory$27  $25  
Debt issuance costs4  4  
Notes receivable—  10  
Other—  4  
Total$110  $89