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Income Taxes (Unaudited) Unrecognized Tax Benefit (Details 2) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Unrecognized Tax Benefit Detail          
Increase in Unrecognized Tax Benefits is Reasonably Possible $ 90     $ 90  
Unrecognized Tax Benefits, Period Increase (Decrease)       180  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 19   $ 64 $ 53 $ 110
Internal Revenue Service (IRS)          
Unrecognized Tax Benefit Detail          
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities   $ 766