Segment Information (Unaudited) Capital Expenditures and Depreciation and Amortization (Details 5) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Capital Expenditures	$ 167	$ 256
Depreciation and amortization	372	337
Aeronautics Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	34	79
Depreciation and amortization	91	89
Defense Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	16	12
Depreciation and amortization	44	43
Mission Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	45	39
Depreciation and amortization	69	67
Space Systems [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	43	110
Depreciation and amortization	96	79
Corporate [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	29	16
Depreciation and amortization	$ 72	$ 59