Segment Information Capital Expenditures and Depreciation and Amortization (Details 7) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	$ 1,450	$ 1,767	$ 1,775
Depreciation and amortization	1,472	1,370	1,338
Aeronautics Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	477	600	510
Depreciation and amortization	383	385	390
Defense Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	110	135	158
Depreciation and amortization	176	175	178
Mission Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	312	314	288
Depreciation and amortization	278	255	246
Space Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	403	652	745
Depreciation and amortization	367	362	370
Corporate
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	148	66	74
Depreciation and amortization	$ 268	$ 193	$ 154