Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Assumed health care cost trend rates (Details)

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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Assumed health care cost trend rates (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Assumed health care cost trend rates    
Health care cost trend rate assumed for the next year (as a percent) 8.50% 8.25%
Rate at which the cost trend rate is assumed to decline, the ultimate trend rate (as a percent) 6.00% 5.50%
Year in which the rate reaches the ultimate trend rate 2029 2030