Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue, Major Customer [Line Items]
Sales	$ 8,797	$ 9,157
Sales percentage	100.00%	100.00%
US Government
Revenue, Major Customer [Line Items]
Sales	$ 7,569	$ 7,694
Sales percentage	86.00%	84.00%
US Government | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,292	$ 2,541
Sales percentage	85.00%	85.00%
US Government | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 775	$ 993
Sales percentage	60.00%	64.00%
US Government | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,794	$ 1,834
Sales percentage	72.00%	71.00%
US Government | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,708	$ 2,326
Sales percentage	94.00%	92.00%
International(2)
Revenue, Major Customer [Line Items]
Sales	$ 1,141	$ 1,357
Sales percentage	13.00%	15.00%
International(2) | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 343	$ 399
Sales percentage	13.00%	14.00%
International(2) | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 293	$ 351
Sales percentage	23.00%	22.00%
International(2) | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 433	$ 502
Sales percentage	17.00%	19.00%
International(2) | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 72	$ 105
Sales percentage	3.00%	4.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Sales	$ 87	$ 106
Sales percentage	1.00%	1.00%
Other Customers [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3	$ 6
Sales percentage	0.00%	0.00%
Other Customers [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 16	$ 33
Sales percentage	1.00%	2.00%
Other Customers [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 24	$ 16
Sales percentage	1.00%	1.00%
Other Customers [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 44	$ 51
Sales percentage	2.00%	2.00%
Intersegment Sales [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 65	$ 44
Sales percentage	2.00%	1.00%
Intersegment Sales [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 199	$ 185
Sales percentage	16.00%	12.00%
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 246	$ 237
Sales percentage	10.00%	9.00%
Intersegment Sales [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 31	$ 39
Sales percentage	1.00%	2.00%
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,703	$ 2,990
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,283	$ 1,562
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,497	$ 2,589
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,855	$ 2,521
Sales percentage	100.00%	100.00%