Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue, Contract Type [Line Items]
Revenues	$ 9,468	$ 10,133
Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 5,007	$ 5,197
Sales percentage	53.00%	51.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 4,461	$ 4,936
Sales percentage	47.00%	49.00%
Aeronautics Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,339	$ 1,344
Sales percentage	48.00%	45.00%
Aeronautics Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,434	$ 1,668
Sales percentage	52.00%	55.00%
Aeronautics Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 41	$ 32
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	2,814	3,044
Defense Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 965	$ 911
Sales percentage	55.00%	54.00%
Defense Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 795	$ 784
Sales percentage	45.00%	46.00%
Defense Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 45	$ 42
Defense Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	1,805	1,737
Mission Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,163	$ 1,067
Sales percentage	47.00%	45.00%
Mission Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,309	$ 1,315
Sales percentage	53.00%	55.00%
Mission Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 335	$ 277
Mission Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	2,807	2,659
Space Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Revenues	$ 1,540	$ 1,875
Sales percentage	63.00%	62.00%
Space Systems [Member] | Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 923	$ 1,169
Sales percentage	37.00%	38.00%
Space Systems [Member] | Intersegment sales
Revenue, Contract Type [Line Items]
Revenues	$ 105	$ 105
Space Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,568	$ 3,149