Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue, Major Customer [Line Items]
Revenues	$ 9,468	$ 10,133
US Government
Revenue, Major Customer [Line Items]
Revenues	$ 8,023	$ 8,844
Sales percentage	84.00%	87.00%
International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 1,286	$ 1,162
Sales percentage	14.00%	12.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 159	$ 127
Sales percentage	2.00%	1.00%
Aeronautics Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 2,290	$ 2,584
Sales percentage	83.00%	86.00%
Aeronautics Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 478	$ 424
Sales percentage	17.00%	14.00%
Aeronautics Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 5	$ 4
Sales percentage	0.00%	0.00%
Aeronautics Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 41	$ 32
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	2,814	3,044
Defense Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 1,451	$ 1,455
Sales percentage	83.00%	86.00%
Defense Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 289	$ 219
Sales percentage	16.00%	13.00%
Defense Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 20	$ 21
Sales percentage	1.00%	1.00%
Defense Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 45	$ 42
Defense Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	1,805	1,737
Mission Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 1,973	$ 1,912
Sales percentage	80.00%	80.00%
Mission Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 475	$ 454
Sales percentage	19.00%	19.00%
Mission Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 24	$ 16
Sales percentage	1.00%	1.00%
Mission Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 335	$ 277
Mission Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	2,807	2,659
Space Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 2,309	$ 2,893
Sales percentage	94.00%	95.00%
Space Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 44	$ 65
Sales percentage	2.00%	2.00%
Space Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 110	$ 86
Sales percentage	4.00%	3.00%
Space Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 105	$ 105
Space Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 2,568	$ 3,149