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Accounts Receivable (Tables)
 12 Months Ended
Dec. 31, 2021
Accounts Receivable, after Allowance for Credit Loss [Abstract]  
Schedule of Accounts Receivable Accounts receivable consisted of the following:
December 3120212020
Non-U.S. government$1,569 $1,701 
U.S. government1,043 1,040 
Commercial429 420 
Total accounts receivable$3,041 $3,161