Income Taxes Unrecognized Tax Benefits (Details 4) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 514	$ 373	$ 305
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		1,000
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		2	766	189
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations		48	1	1
Unrecognized Tax Benefits, Interest on Income Taxes Expense		106	164	62
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Unrecognized tax benefits at beginning of the year		1,447	1,994	1,663
Additions based on tax positions related to the current year		133	236	276
Additions for tax positions of prior years		125	90	254
Reductions for tax positions of prior years		(15)	(106)	(9)
Settlements with taxing authorities		(2)	(766)	(189)
Net change in unrecognized tax benefits		193	(547)	331
Unrecognized tax benefits at end of the year		$ 1,640	1,447	$ 1,994
Internal Revenue Service (IRS) [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 90		766
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Settlements with taxing authorities	(90)		$ (766)
California Franchise Tax Board [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	95
Tax Adjustments, Settlements, and Unusual Provisions	11
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Settlements with taxing authorities	$ (95)