Taxes - Schedule of Cash Taxes Paid (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Examination [Line Items]
Federal	$ 4,745	$ 1,447	$ 1,865
State	665	672	670
Income taxes, net of amounts refunded	5,632	2,343	2,736
Employment taxes	992	1,016	1,245
Property and other taxes	1,836	2,007	1,959
Total	8,460	5,366	5,940
Ireland
Income Tax Examination [Line Items]
Foreign	156	143	147
All other foreign
Income Tax Examination [Line Items]
Foreign	$ 66	$ 81	$ 54