Income Taxes (Unaudited) Unrecognized Tax Benefit (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2023
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Increase in Unrecognized Tax Benefits is Reasonably Possible	$ 90
Current unrecognized tax benefits	1,000			$ 964
Unrecognized Tax Benefit Related to Methods of Accounting	2,100
Unrecognized Tax Benefits Related to Methods of Accounting - 451(b)	872
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 21		$ 13
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