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Segment and Revenue Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Assets $ 142,720 $ 137,012 $ 137,100
Operating Segments | Commercial Airplanes      
Segment Reporting Information [Line Items]      
Assets 83,478 77,047 76,825
Operating Segments | Defense, Space & Security      
Segment Reporting Information [Line Items]      
Assets 16,239 14,921 14,426
Operating Segments | Global Services      
Segment Reporting Information [Line Items]      
Assets 16,473 16,193 16,149
Unallocated items, eliminations and other      
Segment Reporting Information [Line Items]      
Assets $ 26,530 $ 28,851 $ 29,700