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Pension and Postretirement Plans | 9 Months Ended
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Jun. 30, 2025
Retirement Benefits [Abstract] |
Pension and Postretirement Plans | PENSION AND RETIREMENT PLANS Unless otherwise noted, all activities and amounts reported in this footnote include both continuing operations of the Company and activities and amounts related to the R&LC HVAC business. See Note 3, "Assets and Liabilities Held for Sale and Discontinued Operations" for additional details regarding divestiture of the R&LC HVAC business. The components of the Company’s net periodic benefit cost (credit) associated with its defined benefit pension and postretirement plans, which are primarily recorded in selling, general and administrative expenses in the consolidated statements of income, are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions):
| U.S. Pension Plans
| Three Months Ended June 30, |  | Nine Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Interest cost | $ | 16 |  |  | $ | 20 |  |  | $ | 49 |  |  | $ | 59 |
Expected return on plan assets | (24) |  |  | (30) |  |  | (73) |  |  | (90) |
Net periodic benefit credit | $ | (8) |  |  | $ | (10) |  |  | $ | (24) |  |  | $ | (31) |
| Non-U.S. Pension Plans
| Three Months Ended June 30, |  | Nine Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 5 |  |  | $ | 4 |  |  | $ | 13 |  |  | $ | 12 |
Interest cost | 16 |  |  | 17 |  |  | 48 |  |  | 51 |
Expected return on plan assets | (20) |  |  | (18) |  |  | (58) |  |  | (54) |
Net periodic benefit cost | $ | 1 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 9 |
| Postretirement Benefits
| Three Months Ended June 30, |  | Nine Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Interest cost | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 3 |
Expected return on plan assets | (3) |  |  | (3) |  |  | (8) |  |  | (7) |
Amortization of prior service credit | (2) |  |  | (1) |  |  | (4) |  |  | (4) |
Net periodic benefit credit | $ | (4) |  |  | $ | (3) |  |  | $ | (10) |  |  | $ | (8) |

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