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Pension Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Components of net periodic pension expense (income)
Interest cost	$ 1	$ 1	$ 4	$ 3
Expected return on plan assets	(4)	(4)	(12)	(12)
Amortization of net actuarial loss	1	1	3	3
Net periodic expense (income)	$ (2)	$ (2)	$ (5)	$ (6)

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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