v3.26.1
Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Tax Disclosure [Abstract]        
Income tax expense $ 67 $ 5 $ 211 $ 123
Reasonably possible decrease in gross unrecognized tax benefits from ongoing audits and settlement $ 1   $ 1