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Income Taxes - Components of Federal and Foreign Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets related to:
Pensions	$ 1,184	$ 1,485
Accrued compensation and benefits	741	731
Contract accounting methods	949	508
Research and development expenditures	1,643	1,251
Domestic company operating losses	83	0
Foreign company operating losses and credits	6	19
Other	522	487
Valuation allowance	(41)	(32)
Deferred tax assets, net	5,087	4,449
Deferred tax liabilities related to:
Goodwill and intangible assets	545	494
Property, plant and equipment	371	415
Other	638	597
Deferred tax liabilities	1,554	1,506
Net deferred tax assets	$ 3,533	$ 2,943

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from in-process research and development cost acquired in business combination or from joint venture formation or both.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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