RETIREMENT BENEFITS PLANS - Other Postretirement Benefits Plan Assumptions (Details) - Other postretirement benefits plans	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assumptions used to determine benefit obligation at year-end (as a percent)
Discount rate	5.57%	5.11%	5.46%
Health care cost trend rate assumed for next year	6.70%	7.70%	7.10%
Ultimate health care cost trend rate	4.75%	4.75%	4.75%
Year ultimate health care cost trend rate is achieved	2034	2033	2031
Assumptions used to determine expense (as a percent)
Discount rate used to determine benefit obligation	5.11%	5.46%	2.79%
Discount rate used to determine service cost	5.25%	5.53%	3.03%
Discount rate used to determine interest cost	4.96%	5.32%	2.24%
Initial health care cost trend rate	7.70%	7.10%	7.45%
Ultimate health care cost trend rate	4.75%	4.75%	4.75%
Year ultimate health care cost trend rate is achieved	2033	2031	2031