Segment Information Capital Expenditures and Depreciation and Amortization (Details 7) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	$ 1,415	$ 1,420	$ 1,264
Depreciation and amortization	1,239	1,267	1,265
Other Depreciation and Amortization	973	1,005	1,018
Aeronautics Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	465	540	528
Depreciation and amortization	216	238	224
Defense Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	133	78	71
Depreciation and amortization	45	48	44
Mission Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	236	302	229
Depreciation and amortization	170	150	133
Space Systems
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	530	440	352
Depreciation and amortization	247	211	189
Corporate
Additional information by Segment (Table Amounts) [Abstract]
Capital Expenditures	51	60	84
Depreciation and amortization	$ 295	$ 358	$ 428