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GOODWILL AND INTANGIBLE ASSETS (Tables)
 12 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Changes in Carrying Value of Goodwill
The following is a summary of changes in the carrying value of goodwill by segment for the fiscal years ended September 30, 2024 and 2025 (in millions):
Power & ControlAirframeNon-aviationTotal
Balance at September 30, 2023$4,208 $4,701 $79 $8,988 
Goodwill acquired during the period786 563 — 1,349 
Purchase price allocation adjustments (1)
— 35 — 35 
Currency translation adjustments and other40 7 — 47 
Balance at September 30, 20245,034 5,306 79 10,419 
Goodwill acquired during the period189 13 — 202 
Purchase price allocation adjustments (2)
18 (56)— (38)
Currency translation adjustments and other32 (3)— 29 
Balance at September 30, 2025$5,273 $5,260 $79 $10,612 
(1)Primarily related to the opening balance sheet adjustments recorded from the fiscal 2023 acquisition of Calspan Corporation within the allowable measurement period (not to exceed one year).
(2)Primarily related to the opening balance sheet adjustments recorded from the acquisition of Raptor Scientific (Airframe) completed during the fourth quarter of fiscal 2024 and CPI's Electron Device Business (Power & Control) completed during the third quarter of fiscal 2024, within the allowable measurement period (not to exceed one year).
Schedule of Intangible Assets
Other intangible assets–net in the consolidated balance sheets consist of the following at September 30 (in millions):
 20252024
 Gross Carrying AmountAccumulated AmortizationNetGross Carrying AmountAccumulated AmortizationNet
Trademarks and trade names$1,162 $— $1,162 $1,165 $— $1,165 
Technology2,647 1,137 1,510 2,510 1,003 1,507 
Order backlog59 28 31 61 13 48 
Customer relationships971 225 746 895 175 720 
Other12 7 5 12 6 6 
Total$4,851 $1,397 $3,454 $4,643 $1,197 $3,446 
T
Schedule of Acquired Indefinite-lived Intangible Assets by Major Class Intangible assets acquired during the fiscal year ended September 30, 2025 are summarized in the table below (in millions):
Gross AmountAmortization Period
Intangible assets not subject to amortization:
Trademarks and trade names$11 
Intangible assets subject to amortization:
Technology & Other71 
10 to 20 years
Order backlog17 
1 year
Customer relationships37 
10 to 20 years
125 
Total$136 
Schedule of Aggregate Amortization Expense
Information regarding the amortization expense of amortizable intangible assets is detailed below (in millions):
Annual Amortization Expense:
Fiscal Years Ended September 30, 
2025$201 
2024161 
2023139 
Schedule of Finite-Lived Intangible Assets, Future Amortization
Estimated Amortization Expense:
Fiscal Years Ended September 30, 
2026$203 
2027187 
2028179 
2029178 
2030170