Income Taxes Unrecognized Tax Benefits (Details 3) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Increase in Unrecognized Tax Benefits is Reasonably Possible		$ 100
Current unrecognized tax benefits		345	$ 964
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		373	305	$ 216
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		914
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities		766	189	110
Unrecognized Tax Benefits, Interest on Income Taxes Expense		164	62	29
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Unrecognized tax benefits at beginning of the year		1,994	1,663	1,630
Additions based on tax positions related to the current year		236	276	262
Additions for tax positions of prior years		90	254	6
Reductions for tax positions of prior years		(106)	(9)	(124)
Settlements with taxing authorities		(766)	(189)	(110)
Other, net		(1)	(1)	(1)
Net change in unrecognized tax benefits		(547)	331	33
Unrecognized tax benefits at end of the year		1,447	$ 1,994	$ 1,663
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)