Income Taxes Unrecognized Tax Benefits (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 120
Unrecognized Tax Benefit Related to Methods of Accounting	2,000
Unrecognized Tax Benefits Related to Methods of Accounting - 451(b)	843
Current unrecognized tax benefits	964	$ 728
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	305	216
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	848
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	189	110	$ 1
Unrecognized Tax Benefits, Interest on Income Taxes Expense	62	29	25
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Unrecognized tax benefits at beginning of the year	1,663	1,630	1,481
Additions based on tax positions related to the current year	276	262	355
Additions for tax positions of prior years	254	6	47
Reductions for tax positions of prior years	(9)	(124)	(251)
Settlements with taxing authorities	(189)	(110)	(1)
Other, net	(1)	(1)	(1)
Net change in unrecognized tax benefits	331	33	149
Unrecognized tax benefits at end of the year	1,994	$ 1,663	$ 1,630
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
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Settlements with taxing authorities	(90)
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)