Goodwill and Other Purchased Intangible Assets Goodwill Rollforward (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill (Table Amounts)
Beginning balance	$ 17,518	$ 18,708
Reclassification to assets of disposal group held for sale		(1,195)
Other	(3)	5
Ending balance	17,515	17,518
Aeronautics Systems
Goodwill (Table Amounts)
Beginning balance	3,467	3,467
Reclassification to assets of disposal group held for sale		0
Other	0	0
Ending balance	3,467	3,467
Defense Systems
Goodwill (Table Amounts)
Beginning balance	3,415	4,376
Reclassification to assets of disposal group held for sale		(966)
Other	(3)	5
Ending balance	3,412	3,415
Mission Systems
Goodwill (Table Amounts)
Beginning balance	5,881	6,062
Reclassification to assets of disposal group held for sale		(181)
Other	0	0
Ending balance	5,881	5,881
Space Systems
Goodwill (Table Amounts)
Beginning balance	4,755	4,803
Reclassification to assets of disposal group held for sale		(48)
Other	0	0
Ending balance	$ 4,755	$ 4,755