v3.26.3
ACQUISITIONS - Jet Parts Engineering and Victor Sierra Aviation Holdings (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 07, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Business Combination [Line Items]        
Acquisition of businesses, net of cash acquired   $ 4,389 $ 419 $ 2,347
Purchase price allocation adjustments   21 (38)  
GOODWILL   $ 12,946 $ 10,612 $ 10,419
Customer Relationships | Maximum        
Business Combination [Line Items]        
Amortization Period (in years)   20 years    
Technology | Maximum        
Business Combination [Line Items]        
Amortization Period (in years)   20 years    
Jet Parts Engineering and Victor Sierra Aviation Holdings        
Business Combination [Line Items]        
Acquisition of businesses, net of cash acquired $ 2,142      
Purchase price allocation adjustments 47      
Measurement Period Adjustments, Deferred income taxes 90      
Measurement Period Adjustments, Other intangible assets 43      
GOODWILL 1,183      
Other intangible assets 996      
Amount of goodwill expected to be tax deductible 753      
Business acquisition, intangible assets, expected tax deductible amount $ 707      
Goodwill and Intangible Assets, Deductible For Tax Purposes, Term 15 years      
Jet Parts Engineering and Victor Sierra Aviation Holdings | Customer Relationships        
Business Combination [Line Items]        
Other intangible assets $ 625      
Jet Parts Engineering and Victor Sierra Aviation Holdings | Technology-Based Intangible Assets        
Business Combination [Line Items]        
Other intangible assets 280      
Jet Parts Engineering and Victor Sierra Aviation Holdings | Trademarks and trade names        
Business Combination [Line Items]        
Other intangible assets $ 91      
Jet Parts Engineering        
Business Combination [Line Items]        
Business combination, outstanding stock acquired, percentage 95.00%      
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Percentage 5.00%      
Victor Sierra Aviation Holdings        
Business Combination [Line Items]        
Business combination, outstanding stock acquired, percentage 96.00%      
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Percentage 4.00%