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Accounts Receivable
12 Months Ended
Dec. 31, 2021
Accounts Receivable, after Allowance for Credit Loss [Abstract]  
Accounts Receivable Accounts Receivable, net
Accounts receivable at December 31 consisted of the following:
20212020
U.S. government contracts(1)
$1,180 $811 
Commercial Airplanes279 17 
Global Services(2)
1,456 1,437 
Defense, Space, & Security(2)
111 120 
Other5 14 
Less valuation allowance(390)(444)
Total$2,641 $1,955 
(1)Includes foreign military sales through the U.S. government
(2)Excludes U.S. government contracts