Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Amount
U.S. statutory federal income tax rate	$ 2,897
State and local income taxes, net of federal benefit	265
Effect of cross-border tax laws	(42)
Tax credits	(146)
Changes in valuation allowances	22
Non-taxable or non-deductible items	(9)
Changes in unrecognized tax benefits	69
Income tax expense (benefit)	$ 2,962	$ 2,766	$ 2,139
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. statutory federal income tax rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal benefit	1.90%	2.50%	2.40%
Statutory tax rate differential		(1.00%)	(0.80%)
Effect of cross-border tax laws	(0.30%)
Tax credits	(1.00%)
Tax credits and tax-exempt income		(0.70%)	(0.70%)
Tax settlements and lapse of statute of limitations		(0.50%)	(2.00%)
Changes in valuation allowances	0.20%	0.00%	0.10%
Changes in unrecognized tax benefits	0.50%
Other	(0.10%)	0.20%	0.30%
Actual tax rates	21.50%	21.50%	20.30%
JERSEY
Effective Income Tax Rate Reconciliation, Amount
Tax rate differential	$ (423)
Multinational corporate income tax & other	$ 182
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory tax rate differential	(3.10%)
Multinational corporate income tax & other	1.30%
Other
Effective Income Tax Rate Reconciliation, Amount
Tax rate differential	$ 148
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory tax rate differential	1.10%