Reconciliation of Statutory and Effective Tax Rates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation, Amount
U.S. Federal statutory income tax rate	$ 1,507	$ 1,396	$ 1,389
State and local income tax, net of federal tax benefit	189	211	131
Nontaxable or nondeductible items	14	14	16
Changes in unrecognized tax benefits	(4)	1	(5)
Tax credits	(6)	(6)	(4)
Foreign tax effects	0	2	0
Tax law change effects	0	0	0
Effects of cross-border tax laws	0	0	0
Changes in valuation allowances	0	0	0
Other, net	(1)	(1)	0
Income tax expense	$ 1,699	$ 1,617	$ 1,527
Effective Income Tax Rate Reconciliation, Percent
U.S. Federal statutory income tax rate	21.00%	21.00%	21.00%
State and local income tax, net of federal tax benefit	2.70%	3.20%	1.90%
Nontaxable or nondeductible items	0.20%	0.20%	0.20%
Changes in unrecognized tax benefits	(0.10%)	0.00%	0.00%
Tax credits	(0.10%)	(0.10%)	0.00%
Foreign tax effects	0.00%	0.00%	0.00%
Tax law change effects	0.00%	0.00%	0.00%
Effects of cross-border tax laws	0.00%	0.00%	0.00%
Changes in valuation allowances	0.00%	0.00%	0.00%
Other, net	0.00%	0.00%	0.00%
Effective tax rate	23.70%	24.30%	23.10%