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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
737 MAX Customer Concessions and Other Considerations Liability
The following table summarizes changes in the 737 MAX customer concessions and other considerations liability during the three months ended March 31, 2022 and 2021.
20222021
Beginning balance – January 1$2,940 $5,537 
Reductions for payments made(550)(1,172)
Reductions for concessions and other in-kind considerations(5)(25)
Changes in estimates34 30 
Ending balance – March 31$2,419 $4,370 
Environmental
The following table summarizes environmental remediation activity during the three months ended March 31, 2022 and 2021.
20222021
Beginning balance – January 1$605 $565 
Reductions for payments made, net of recoveries(13)
Changes in estimates48 15 
Ending balance – March 31$653 $567 
Product Warranties
The following table summarizes product warranty activity recorded during the three months ended March 31, 2022 and 2021.
20222021
Beginning balance – January 1$1,900 $1,527 
Additions for current year deliveries35 17 
Reductions for payments made(118)(44)
Changes in estimates149 234 
Ending balance – March 31$1,966 $1,734 
Financing Commitments The estimated earliest potential funding dates for these commitments as of March 31, 2022 are as follows:

Total
April through December 2022$1,759 
20233,287 
20242,501 
20252,148 
20261,183 
Thereafter1,883 
$12,761