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Subsequent Events (Details) - Subsequent Event - USD ($) $ in Billions | 3 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Jul. 23, 2024
Johnson Controls - Hitachi Air Conditioning Holding (UK) Ltd |  |
Subsequent Event [Line Items] |  |
Ownership percentage |  | 60.00%
Residential and Light Commercial HVAC Business |  |
Subsequent Event [Line Items] |  |
Proceeds from divestiture of businesses |  | $ 6.7
Residential and Light Commercial HVAC Business | Forecast |  |
Subsequent Event [Line Items] |  |
Net proceeds | $ 5.0 |
Hitachi Global Life Solutions, Inc. | Johnson Controls - Hitachi Air Conditioning Holding (UK) Ltd |  |
Subsequent Event [Line Items] |  |
Ownership percentage |  | 40.00%
Johnson Controls International PLC And Hitachi Global Life Solutions, Inc. | Residential and Light Commercial HVAC Business |  |
Subsequent Event [Line Items] |  |
Proceeds from divestiture of businesses |  | $ 8.1

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