Accounts Receivable, net - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounts Receivables [Line Items]
Less allowances for expected credit losses	$ (76)	$ (92)	$ (89)
Total	2,921	2,631
U.S. government contracts
Accounts Receivables [Line Items]
Accounts receivable, before allowance for credit loss, current	1,083	923
Commercial Airplanes
Accounts Receivables [Line Items]
Accounts receivable, before allowance for credit loss, current	129	48
Global Services
Accounts Receivables [Line Items]
Accounts receivable, before allowance for credit loss, current	1,436	1,581
Defense, Space, & Security
Accounts Receivables [Line Items]
Accounts receivable, before allowance for credit loss, current	125	165
Other
Accounts Receivables [Line Items]
Accounts receivable, before allowance for credit loss, current	$ 224	$ 6