v3.26.1
Summary of Significant Accounting Policies (Unaudited) Contract Estimates (Details 2) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 18 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2025
Change in Accounting Estimate [Abstract]              
Operating income $ 1,096   $ 1,425   $ 2,085 $ 1,998  
Net earnings $ 1,094   $ 1,174   $ 1,969 $ 1,655  
Diluted earnings per share $ 7.68   $ 8.15   $ 13.83 $ 11.45  
B-21 loss provision         $ 0 $ 477 $ 2,000
Change in Accounting Estimate [Line Items]              
Operating income $ 1,096   $ 1,425   2,085 1,998  
Net earnings $ 1,094   $ 1,174   $ 1,969 $ 1,655  
Diluted earnings per share $ 7.68   $ 8.15   $ 13.83 $ 11.45  
B-21 loss provision         $ 0 $ 477 $ 2,000
Contracts Accounted for under Percentage of Completion [Member]              
Change in Accounting Estimate [Abstract]              
Revenue $ 112   $ 164   104 202  
Operating income 94   126   14 26  
Net earnings $ 74   $ 100   $ 11 $ 21  
Diluted earnings per share $ 0.52   $ 0.69   $ 0.08 $ 0.15  
Change in Accounting Estimate [Line Items]              
Revenue $ 112   $ 164   $ 104 $ 202  
Operating income 94   126   14 26  
Net earnings $ 74   $ 100   $ 11 $ 21  
Diluted earnings per share $ 0.52   $ 0.69   $ 0.08 $ 0.15  
B-21 Program LRIP Options 1-5 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]              
Change in Accounting Estimate [Abstract]              
Loss Contingency Accrual $ 1,000       $ 1,000    
Change in Accounting Estimate [Line Items]              
Loss Contingency Accrual 1,000       $ 1,000    
B-21 Program LRIP Options 1-4 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]              
Change in Accounting Estimate [Abstract]              
Operating income   $ (157)          
Change in Accounting Estimate [Line Items]              
Operating income   (157)          
B-21 Program LRIP Options 1-2 | Contracts Accounted for under Percentage of Completion [Member] | Aeronautics Systems [Member]              
Change in Accounting Estimate [Abstract]              
Operating income       $ (226)      
Change in Accounting Estimate [Line Items]              
Operating income       $ (226)      
Sentinel EMD phase [Member] | Contracts Accounted for under Percentage of Completion [Member] | Defense Systems [Member]              
Change in Accounting Estimate [Abstract]              
Operating income     $ 76        
Change in Accounting Estimate [Line Items]              
Operating income     $ 76        
Stand-in Attack Weapon Program [Member] | Contracts Accounted for under Percentage of Completion [Member] | Defense Systems [Member]              
Change in Accounting Estimate [Abstract]              
Operating income (68)            
Change in Accounting Estimate [Line Items]              
Operating income (68)            
GEM 63XL Program | Contracts Accounted for under Percentage of Completion [Member] | Space Systems [Member]              
Change in Accounting Estimate [Abstract]              
Operating income (91) (71)          
Change in Accounting Estimate [Line Items]              
Operating income $ (91) $ (71)