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Retirement Plans - Schedule of Pre-Tax Changes in Other Comprehensive Income/Loss (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (loss)/gain	$ (11)	$ (159)	$ 272
Amortization of: Actuarial loss	11	9	86
Total	$ 0	$ (150)	$ 358

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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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