EMPLOYEE BENEFIT PLANS Asset allocations (Details)	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure
Equity securities	100.00%	100.00%
Fixed Income Investments [Member]
Defined Benefit Plan Disclosure
Equity securities	44.80%	44.70%
Other Investments [Member]
Defined Benefit Plan Disclosure
Equity securities	15.20%	15.40%
Canada | Equity Securities [Member]
Defined Benefit Plan Disclosure
Equity securities	12.50%	12.40%
United States | Equity Securities [Member]
Defined Benefit Plan Disclosure
Equity securities	5.00%	5.00%
Non-US [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure
Equity securities	22.50%	22.50%