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LEASES AND COMMITMENTS - Terms and discounts under operating leases (Details)
Dec. 31, 2021
Dec. 31, 2020
Weighted-average remaining lease term (years)    
Operating leases 7 years 8 years
Finance leases 7 years 8 years
Weighted-average discount rate    
Operating leases 2.00% 2.00%
Finance leases 3.00% 3.10%