Pension - Defined Benefit Plan (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Retirement Benefits [Abstract]
Service cost	$ 0	$ 0	$ 1	$ 1
Interest cost	4	4	12	12
Expected return on plan assets	(3)	(3)	(9)	(10)
Amortization of net actuarial loss	0	1	1	3
Net periodic benefit cost	$ 1	$ 2	$ 5	$ 6

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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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