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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Income Tax Disclosure [Abstract]        
Effective income tax rate reconciliation, percent 11.00% 41.00% 17.00% 26.00%
Recognized tax benefit $ 176 $ 51    
Adjustment related to the remeasurement of UK deferred tax liabilities   1,000    
Effective income tax rate reconciliation, recognized tax benefit       $ 147
Increase in unrecognized tax benefits, gross 34   $ 109  
Unrecognized tax benefits that would impact effective tax rate 75 $ 29 75 $ 29
Accrued penalties related to uncertain tax positions $ 31   $ 31