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Pension - Defined Benefit Plan (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Retirement Benefits [Abstract]    
Interest cost $ 4 $ 4
Expected return on plan assets (3) (3)
Amortization of net actuarial loss 1 1
Net periodic benefit cost $ 2 $ 2