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Receivables (Tables)
 9 Months Ended
Sep. 30, 2021
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Receivables consisted of the following:
September 30, 2021December 31, 2020
Trade receivables$211 $161 
Income tax receivable11 2 
Other receivables27 23 
Allowance for doubtful accounts(2)(2)
Total$248 $184