Goodwill and Other Purchased Intangible Assets Goodwill Rollforward (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill (Table Amounts)
Beginning balance	$ 17,512	$ 17,517
Other	5	(5)
Goodwill, Written off Related to Sale of Business Unit	(80)
Ending balance	17,437	17,512
Aeronautics Systems
Goodwill (Table Amounts)
Beginning balance	3,974	3,974
Other	0	0
Goodwill, Written off Related to Sale of Business Unit	0
Ending balance	3,974	3,974
Defense Systems
Goodwill (Table Amounts)
Beginning balance	3,717	3,722
Other	5	(5)
Goodwill, Written off Related to Sale of Business Unit	(80)
Ending balance	3,642	3,717
Mission Systems
Goodwill (Table Amounts)
Beginning balance	5,881	5,881
Other	0	0
Goodwill, Written off Related to Sale of Business Unit	0
Ending balance	5,881	5,881
Space Systems
Goodwill (Table Amounts)
Beginning balance	3,940	3,940
Other	0	0
Goodwill, Written off Related to Sale of Business Unit	0
Ending balance	$ 3,940	$ 3,940