v3.26.3
Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
US federal statutory income tax rate $ 354    
Tax Jurisdiction of Domicile [Extensible Enumeration] U.S. Plans    
Research credits $ (21)    
Foreign tax credit (28)    
Nontaxable and nondeductible items 11    
Foreign Inclusions 7    
Foreign Derived Intangible Income Deduction (11)    
Share Based Compensation (20)    
Sensia Joint Venture Dissolution (34)    
Domestic state and local income taxes, net of federal effect 12    
Worldwide changes in unrecognized tax benefits (11)    
BEPS Pillar Two Top up Tax 46    
Withholding Taxes 25    
Income tax provision $ 278 $ 168 $ 152
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Statutory tax rate 21.00% 21.00% 21.00%
Research and development tax credit (1.30%) (2.90%) (2.00%)
Foreign tax credit (1.60%)    
Nontaxable and nondeductible items 0.60%    
Foreign Inclusions 0.40%    
Foreign-derived intangible income (0.60%) (1.50%) (0.70%)
Share Based Compensation (1.20%) (1.10%) (0.20%)
Sensia Joint Venture Dissolution (2.00%)    
State and local income taxes 0.70% (0.10%) 0.20%
Worldwide changes in unrecognized tax benefits (0.70%)    
Non-United States taxes   (3.80%) (4.20%)
BEPS Pillar Two Top up Tax 2.70%    
Withholding Taxes 1.50%    
Repatriation of foreign earnings   1.00% 0.90%
Settlements with taxing authorities and tax refund claims   0.60% (1.20%)
Change in valuation allowance   3.60% 0.50%
Other   1.50% (0.50%)
Effective income tax rate 16.50% 18.30% 13.80%
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance and nondeductible goodwill impairment losses, percent   3.60%  
U.S. Plans      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Other $ (3)    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Other (0.20%)    
Singapore      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Foreign rate differential $ (78)    
Other $ 1    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Non-United States taxes (4.60%)    
Other 0.10%    
Other      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Foreign rate differential $ 28    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Non-United States taxes 1.70%