Segment Information (Unaudited) Capital Expenditures and Depreciation and Amortization (Details 5) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Capital Expenditures	$ 301	$ 361	$ 788	$ 951
Depreciation and amortization	379	331	1,066	956
Aeronautics Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	102	139	250	339
Depreciation and amortization	92	92	273	266
Defense Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	21	24	44	46
Depreciation and amortization	47	44	132	129
Mission Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	66	62	152	143
Depreciation and amortization	71	64	206	188
Space Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	70	128	251	401
Depreciation and amortization	98	86	261	246
Corporate [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	42	8	91	22
Depreciation and amortization	$ 71	$ 45	$ 194	$ 127