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Pension Benefits (Details) - UNITED STATES - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 1 | $ 1 | $ 2 | $ 2
Interest cost | 10 | 11 | 21 | 21
Expected return on plan assets | (13) | (13) | (26) | (25)
Amortization of net loss | 1 | (1) | 1 | (1)
Amortization of prior service cost | 1 | 1 | 1 | 1
Net periodic benefit cost | $ 0 | $ (1) | $ (1) | $ (2)

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