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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill in each of the Company’s reportable segments were as follows (in millions):
Year Ended September 30, 2024
Building Solutions North AmericaBuilding Solutions EMEA/LABuilding Solutions Asia PacificGlobal ProductsTotal
Goodwill$10,040 $1,932 $1,179 $4,586 17,737 
Accumulated impairment loss(659)(47)— (259)(965)
Balance at beginning of period9,381 1,885 1,179 4,327 16,772 
Impairments— (230)— — (230)
Foreign currency translation and other (1)
10 107 48 18 183 
Balance at end of period$9,391 $1,762 $1,227 $4,345 $16,725 
(1) Includes measurement period adjustments and the allocation of $21 million of goodwill from Global Products to the ADTi disposal group classified as held for sale in June 2024 and subsequently divested in July 2024. Refer to Note 2, "Acquisitions and Divestitures" of the notes to the consolidated financial statements for further information.
Year Ended September 30, 2023
Building Solutions North AmericaBuilding Solutions EMEA/LABuilding Solutions Asia PacificGlobal ProductsTotal
Goodwill$9,630 $1,794 $1,116 $4,416 16,956 
Accumulated impairment loss(659)(47)— (75)(781)
Balance at beginning of period8,971 1,747 1,116 4,341 16,175 
Acquisitions399 13 55 119 586 
Impairments— — — (184)(184)
Foreign currency translation and other11 125 8 51 195 
Balance at end of period$9,381 $1,885 $1,179 $4,327 $16,772 
Other Intangible Assets
The Company’s other intangible assets, primarily from business acquisitions, consisted of (in millions):
September 30,
 20242023
 Gross
Carrying
Amount		Accumulated
Amortization		NetGross
Carrying
Amount		Accumulated
Amortization		Net
Definite-lived intangible assets
Technology$1,592 $(955)$637 $1,562 $(795)$767 
Customer relationships2,632 (1,517)1,115 2,854 (1,380)1,474 
Miscellaneous886 (480)406 831 (409)422 
5,110 (2,952)2,158 5,247 (2,584)2,663 
Indefinite-lived intangible assets
Trademarks/tradenames1,972 — 1,972 2,109 — 2,109 
Total intangible assets$7,082 $(2,952)$4,130 $7,356 $(2,584)$4,772 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The following table summarizes estimated amortization of existing definite-lived intangible assets as of September 30, 2024 for each of the next five fiscal years (in millions):
2025$453 
2026400
2027365
2028276
2029183