Goodwill and Other Purchased Intangible Assets Amounts in Paragraphs - Goodwill and Other Purchased Intangible Assets (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Amortization of Intangible Assets	$ 45	$ 57	$ 80
Aeronautics Systems
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss	417	417
Space Systems
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss	121	121
Defense Systems
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss	$ 32	$ 32