v3.25.4
Income taxes - Income tax expense (benefit) reconciliation (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Earnings before income taxes      
Domestic $ 77,083 $ 105,065 $ 115,412
Foreign 5,376 5,311 4,754
Earnings before income taxes 82,459 110,376 120,166
Income tax expense reconciliation      
U.S. federal income tax at the statutory tax rate, amount $ 17,316 $ 23,179 $ 25,235
Tax Jurisdiction of Domicile [Extensible Enumeration] us-gaap:DomesticCountryMember us-gaap:DomesticCountryMember us-gaap:DomesticCountryMember
State and local income taxes, net of U.S. federal effect, amount [1] $ 769 $ 606 $ 603
U.S. federal income tax credits:      
Energy production tax credits, amount (2,084) (2,039) (1,817)
Other, amount (597) (536) (369)
U.S. federal nontaxable or nondeductible items:      
Dividends received deduction, amount (460) (491) (678)
Other,amount 257 (38) (260)
Other differences, net amount (2) 134 305
Total income taxes $ 15,199 $ 20,815 $ 23,019
Income tax expense reconciliation, percentage      
U.S. federal income tax at the statutory tax rate, percentage 21.00% 21.00% 21.00%
State and local income taxes, net of U.S. federal effect, percentage [1] 0.90% 0.50% 0.50%
U.S. federal income tax credits percentage      
Energy production tax credits, percentage (2.50%) (1.80%) (1.50%)
Other percentage (0.70%) (0.50%) (0.30%)
U.S. federal nontaxable or nondeductible items, percentage      
Dividends received deduction, percentage (0.60%) (0.40%) (0.60%)
Other percentage 0.30% (0.00%) (0.20%)
Other differences, net percentage (0.00%) 0.10% 0.30%
Effective income tax rate percentage 18.40% 18.90% 19.20%
[1] In each year, no fewer than five states, in the aggregate, represented the majority of state income taxes.