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Receivables (Tables)
3 Months Ended
Mar. 31, 2021
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Receivables consisted of the following:
March 31, 2021December 31, 2020
Trade receivables$226 $161 
Income tax receivable10 
Other receivables30 23 
Allowance for doubtful accounts(2)(2)
Total$264 $184