v3.26.3
GOODWILL AND INTANGIBLE ASSETS - Summary of Changes in Carrying Value of Goodwill (Detail) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Goodwill [Line Items]    
Goodwill, Beginning Balance $ 10,612 $ 10,419
Goodwill, Acquired During Period 2,356 202
Purchase price allocation adjustments 21 (38)
Currency translation adjustments and other (43) 29
Goodwill, Ending Balance 12,946 10,612
Power & Control    
Goodwill [Line Items]    
Goodwill, Beginning Balance 5,273 5,034
Goodwill, Acquired During Period 2,272 189
Purchase price allocation adjustments 21 18
Currency translation adjustments and other (26) 32
Goodwill, Ending Balance 7,540 5,273
Airframe    
Goodwill [Line Items]    
Goodwill, Beginning Balance 5,260 5,306
Goodwill, Acquired During Period 84 13
Purchase price allocation adjustments 0 (56)
Currency translation adjustments and other (17) (3)
Goodwill, Ending Balance 5,327 5,260
Non-aviation    
Goodwill [Line Items]    
Goodwill, Beginning Balance 79 79
Goodwill, Acquired During Period 0 0
Purchase price allocation adjustments 0 0
Currency translation adjustments and other 0 0
Goodwill, Ending Balance $ 79 $ 79