Income Taxes - Federal Statutory (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	$ 3,921	$ 4,300	$ 1,950
State income taxes, net of federal benefit	363	418	454
Foreign income taxed at different rates	363	455	586
Adjustments to uncertain and effectively settled tax positions, net	332	353	179
Tax credits	(328)	(280)	(171)
Excess tax benefits recognized on share-based compensation	(4)	4	(30)
Tax legislation	(24)	8	(287)
Internal corporate reorganization	1,920	0	0
Goodwill impairment	0	0	1,666
Other	93	113	12
Income tax expense (benefit)	$ 2,796	$ 5,371	$ 4,359