Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue, Contract Type [Line Items]
Revenues	$ 10,351	$ 10,218	$ 19,819	$ 20,351
Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 5,513	$ 5,293	$ 10,520	$ 10,490
Sales percentage	53.00%	52.00%	53.00%	52.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 4,838	$ 4,925	$ 9,299	$ 9,861
Sales percentage	47.00%	48.00%	47.00%	48.00%
Aeronautics Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,461	$ 1,415	$ 2,800	$ 2,759
Sales percentage	47.00%	47.00%	48.00%	46.00%
Aeronautics Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,615	$ 1,611	$ 3,049	$ 3,279
Sales percentage	53.00%	53.00%	52.00%	54.00%
Aeronautics Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 38	$ 34	$ 79	$ 66
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	3,114	3,060	5,928	6,104
Defense Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,084	$ 967	$ 2,049	$ 1,878
Sales percentage	56.00%	53.00%	55.00%	54.00%
Defense Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 854	$ 847	$ 1,649	$ 1,631
Sales percentage	44.00%	47.00%	45.00%	46.00%
Defense Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 53	$ 45	$ 98	$ 87
Defense Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	1,991	1,859	3,796	3,596
Mission Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,406	$ 1,107	$ 2,569	$ 2,174
Sales percentage	50.00%	45.00%	49.00%	45.00%
Mission Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,410	$ 1,369	$ 2,719	$ 2,684
Sales percentage	50.00%	55.00%	51.00%	55.00%
Mission Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 341	$ 297	$ 676	$ 574
Mission Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	3,157	2,773	5,964	5,432
Space Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,562	$ 1,804	$ 3,102	$ 3,679
Sales percentage	62.00%	62.00%	62.00%	62.00%
Space Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 959	$ 1,098	$ 1,882	$ 2,267
Sales percentage	38.00%	38.00%	38.00%	38.00%
Space Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 125	$ 100	$ 230	$ 205
Space Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,646	$ 3,002	$ 5,214	$ 6,151