RETIREMENT BENEFITS Retirement Benefits - Weighted-average Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Postemployment Benefits [Abstract]
Discount rate	2.18%	3.00%	4.05%
Tax exempt accounts	7.00%	7.00%	7.00%
Expected long term reurn on assets, taxable accounts	4.75%	4.75%	4.75%