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Inventories (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Inventory [Line Items]      
Long-term contracts in progress $ 821   $ 872
Increase/(Decrease) in (Loss)/earnings from operations due to change in accounting estimate 1,130 $ 176  
Airplane Program 787 [Member]      
Inventory [Line Items]      
Amount of Deferred Costs Related to Long-term Contracts 11,753   11,693
Advances on Inventory Purchases 1,861   1,907
Unamortized Tooling 1,818   1,815
Recovered Production Costs Excess Recoverable Under Existing Firm Orders 8,901    
Unrecovered Production Costs, Excess Unrecoverable under Existing Firm Orders 4,670    
Increase/(Decrease) in (Loss)/earnings from operations due to change in accounting estimate     (3,460)
Abnormal Production cost. 312    
Airplane Program 737 [Member]      
Inventory [Line Items]      
Amount of Deferred Costs Related to Long-term Contracts 1,753   1,296
Unamortized Tooling 600   617
Recovered Production Costs Excess Recoverable Under Existing Firm Orders 2,343    
Unrecovered Production Costs, Excess Unrecoverable under Existing Firm Orders 10    
Airplane Program 777x [Member]      
Inventory [Line Items]      
Amount of Deferred Costs Related to Long-term Contracts 1,091   652
Unamortized Tooling 3,572   3,521
Capitalized Precontract Costs      
Inventory [Line Items]      
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs 710   648
Early Issue Sales Consideration [Member]      
Inventory [Line Items]      
Inventory Amount, Unpriced Change Orders for Long-term Contracts or Programs $ 3,383   $ 3,290