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Pension and Postretirement Benefit Plans and Defined Contribution Plans - Healthcare Cost Trend Rate Assumptions (Details) - Postretirement Plans [Member]
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Healthcare cost trend rate assumed for next year 7.90% 6.40%
Rate to which the cost trend rate is assumed to decline 4.00% 4.00%