RETIREMENT BENEFITS - Assumptions Used (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
U.S. | Postretirement Benefit Plans
Plan Assumptions - During the year
Discount rate	2.75%	2.65%
Plan Assumptions - At period end
Discount rate	3.85%	2.75%	2.85%
Non-U.S. plans | Pension Plans | Weighted Average
Plan Assumptions - During the year
Discount rate	4.56%	4.37%
Plan Assumptions - At period end
Discount rate	5.55%	4.56%	3.59%
Non-U.S. plans | Pension Plans | Minimum
Plan Assumptions - During the year
Discount rate	0.25%	0.30%
Plan Assumptions - At period end
Discount rate	1.10%	0.25%	0.25%
Non-U.S. plans | Pension Plans | Maximum
Plan Assumptions - During the year
Discount rate	9.80%	9.55%
Plan Assumptions - At period end
Discount rate	10.00%	9.80%	9.30%
Non-U.S. plans | Postretirement Benefit Plans
Plan Assumptions - During the year
Discount rate	10.00%	9.80%
Plan Assumptions - At period end
Discount rate	10.10%	10.00%	9.70%
Qualified plans | U.S. | Pension Plans
Plan Assumptions - During the year
Discount rate	2.80%	2.80%
Plan Assumptions - At period end
Discount rate	3.80%	2.80%	3.10%
Nonqualified plans | U.S. | Pension Plans
Plan Assumptions - During the year
Discount rate	2.80%	2.75%
Plan Assumptions - At period end
Discount rate	3.85%	2.80%	3.00%