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v3.25.3

Acquisitions and Divestitures - Narrative (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) business | Sep. 30, 2023 USD ($) | Jul. 31, 2025 USD ($) | Jul. 31, 2024
Business Acquisitions |  |  |  |  |
Number of divestitures during period | business |  | 3 |  |  |
Business divestitures, net of cash divested | $ 5 | $ 345 | $ 28 |  |
Net financing charges | 0 | (42) | 0 |  |
Non-cash restructuring and impairment charges | 427 | 411 | $ 827 |  |
Total assets | $ 37,939 | 42,695 |  |  |
Johnson Controls - Hitachi Air Conditioning Holding (UK) Ltd |  |  |  |  |
Business Acquisitions |  |  |  |  |
Joint venture ownership | 60.00% |  |  |  | 60.00%
Johnson Controls - Hitachi Air Conditioning Holding (UK) Ltd | Hitachi Global Life Solutions, Inc. |  |  |  |  |
Business Acquisitions |  |  |  |  |
Joint venture ownership | 40.00% |  |  |  | 40.00%
Residential and Light Commercial HVAC Business | Discontinued Operations, Disposed of by Sale |  |  |  |  |
Business Acquisitions |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  | $ 5,600 |
Gain on sale of business, net of transaction and other costs, before tax | $ 2,700 |  |  |  |
Gain on sale of business, net of transaction and other costs, net of tax | $ 1,500 |  |  |  |
Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] | Income from discontinued operations, net of tax |  |  |  |
Air Distribution Technologies (ADTi) | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations |  |  |  |  |
Business Acquisitions |  |  |  |  |
Disposal group, including discontinued operation, consideration |  | 347 |  |  |
Business divestitures, net of cash divested |  | 332 |  |  |
Net financing charges |  | 42 |  |  |
Non-cash restructuring and impairment charges |  | $ 56 |  |  |

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