v3.26.3
Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Amount      
Federal statutory income tax rate $ 580    
U.S. state income taxes, net of federal income tax benefit 59    
Foreign tax effects 31    
Effect of changes in tax laws or rates enacted in the current period 0    
Foreign-derived intangibles income (47)    
Other 24    
Tax credits (29)    
Federal valuation allowance - 163j 48    
Nontaxable or nondeductible items (14)    
Changes in unrecognized tax benefits (1)    
Other adjustments 5    
INCOME TAX PROVISION $ 656 $ 555 $ 500
Percent      
Federal statutory income tax rate 21.00% 21.00% 21.00%
State and Local Income Taxes, Net of Federal Income Tax Effect 2.10% 0.90% 1.30%
Foreign tax effects 1.10%    
Effect of changes in tax laws or rates enacted in the current period 0.00%    
Foreign-derived intangibles income (1.70%)    
Other 0.80%    
Tax credits (1.00%)    
Federal valuation allowance - 163j 1.70%    
Nontaxable or nondeductible items (0.50%)    
Changes in unrecognized tax benefits 0.00%    
Other adjustments 0.20%    
Income tax expense and effective tax rate 23.70% 21.10% 22.60%
Tax Jurisdiction of Domicile [Extensible Enumeration] UNITED STATES