OTHER - Contract Estimates (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 29, 2025	Dec. 31, 2024	Mar. 31, 2024	Jun. 29, 2025	Jun. 30, 2024
Change in Accounting Estimate [Line Items]
Program losses				$ 1,615	$ 165
Contract liabilities	$ 9,861	$ 9,795		9,861
TUHP
Change in Accounting Estimate [Line Items]
Program losses	95
Cumulative losses on development	130			130
Aeronautics | Classified Program
Change in Accounting Estimate [Line Items]
Program losses	950
Favorable profit adjustments				80
Contract liabilities	583			583
Aeronautics | Classified Program | Initial Phase
Change in Accounting Estimate [Line Items]
Reach-forward loss	690			730
Cumulative losses on development	1,400			1,400
Aeronautics | Classified Program | Additional Phases
Change in Accounting Estimate [Line Items]
Reach-forward loss	260			95
Cumulative losses on development	355			355
Rotary and Mission Systems | CMHP
Change in Accounting Estimate [Line Items]
Program losses	570
Cumulative losses on development	670			670
Contract assets	680			680
Rotary and Mission Systems | TUHP
Change in Accounting Estimate [Line Items]
Program losses	95
Space | Commercial Civil Space Program
Change in Accounting Estimate [Line Items]
Favorable profit adjustments				125
Missiles and Fire Control | Classified Program
Change in Accounting Estimate [Line Items]
Reach-forward loss		$ 1,310	$ 100		$ 100
Cumulative losses on development	1,460			1,460
Contract liabilities	$ 1,300			$ 1,300