Income Taxes (Unaudited) Unrecognized Tax Benefit (Details 2) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 120
Current unrecognized tax benefits	909	$ 728
Unrecognized Tax Benefit Related to Methods of Accounting	1,900
Unrecognized Tax Benefits Related to Methods of Accounting - 451(b)	807
Internal Revenue Service (IRS)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	90
California Franchise Tax Board
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