Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, Contract Type [Line Items]
Sales	$ 8,797	$ 9,157
Sales percentage	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,430	$ 4,629
Sales percentage	50.00%	51.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,276	$ 1,411
Sales percentage	48.00%	48.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 336	$ 509
Sales percentage	31.00%	37.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 835	$ 865
Sales percentage	37.00%	37.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,983	$ 1,844
Sales percentage	70.00%	74.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,367	$ 4,528
Sales percentage	50.00%	49.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,362	$ 1,535
Sales percentage	52.00%	52.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 748	$ 868
Sales percentage	69.00%	63.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,416	$ 1,487
Sales percentage	63.00%	63.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 841	$ 638
Sales percentage	30.00%	26.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 65	$ 44
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	199	185
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	246	237
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	31	39
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,703	$ 2,990
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,283	$ 1,562
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,497	$ 2,589
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,855	$ 2,521
Sales percentage	100.00%	100.00%