Income Taxes (Reconciliation of Effective Tax Rate and U.S. Federal Statutory Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
$
Provision computed at U.S. federal statutory rate	$ 1,972	$ 2,868	$ 2,295
Domestic state and local, net of federal effect	278	557	463
Foreign tax effects	(10)	3	11
Cross-border tax laws	3	(46)	(2)
Tax credits	(39)	(31)	(25)
Changes in valuation allowance	91	(939)	57
Nondeductible goodwill	243	0	0
Other	8	(3)	(9)
Worldwide changes in unrecognized tax benefits	(104)	(15)	8
Total provision for income taxes	$ 2,442	$ 2,394	$ 2,798
%
Provision computed at U.S. federal statutory rate	21.00%	21.00%	21.00%
Domestic state and local, net of federal effect	3.00%	4.10%	4.20%
Foreign tax effects	(0.10%)	0.00%	0.10%
Cross-border tax laws	0.00%	(0.40%)	0.00%
Tax credits	(0.40%)	(0.20%)	(0.20%)
Changes in valuation allowance	1.00%	(6.90%)	0.50%
Nondeductible goodwill	2.60%	0.00%	0.00%
Other	0.00%	0.00%	(0.10%)
Worldwide changes in unrecognized tax benefits	(1.10%)	(0.10%)	0.10%
Effective tax rate	26.00%	17.50%	25.60%