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Components of Net Periodic Benefit Cost | 3 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Components of Net Periodic Benefit Cost | Components of Net Periodic Benefit Cost Net periodic benefit cost for defined benefit plans includes the following components:
|  | Three Months Ended September 30, |  |
($ in millions) |  | 2025 |  | 2024 |  |  |  |
Service cost |  | $ | 5 |  |  | $ | 4 |  |  |  |  |
Interest cost |  | 22 |  |  | 13 |  |  |  |  |
Expected return on plan assets |  | (24) |  |  | (13) |  |  |  |  |
Amortization of actuarial loss |  | 2 |  |  | 1 |  |  |  |  |
Amortization of prior service credit |  | (1) |  |  | (1) |  |  |  |  |
Net periodic benefit cost |  | $ | 4 |  |  | $ | 4 |  |  |  |  |
Service cost is included in operating income. All other components of net periodic benefit cost are recorded within other non-operating income/(expenses), net.

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