EMPLOYEE BENEFIT PLANS Asset allocations (Details)	Dec. 31, 2020	Dec. 31, 2019
United States
Defined Benefit Plan Disclosure
Total investments	100.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	100.00%
Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	100.00%	100.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	100.00%	100.00%
Defined Benefit Plan, Equity Securities | United States
Defined Benefit Plan Disclosure
Total investments	38.60%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	37.00%
Defined Benefit Plan, Equity Securities | United States | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	30.00%
Defined Benefit Plan, Equity Securities | United States | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	45.00%
Defined Benefit Plan, Equity Securities | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	38.10%	40.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	41.00%	40.00%
Defined Benefit Plan, Equity Securities | Foreign Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	25.00%
Defined Benefit Plan, Equity Securities | Foreign Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	48.00%
US Treasury and Government | United States
Defined Benefit Plan Disclosure
Total investments	22.20%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	24.00%
US Treasury and Government | United States | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	0.00%
US Treasury and Government | United States | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	40.00%
Corporate Debt Securities | United States
Defined Benefit Plan Disclosure
Total investments	6.70%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	8.00%
Corporate Debt Securities | United States | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	0.00%
Corporate Debt Securities | United States | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	40.00%
Corporate Debt Securities | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	5.90%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	1.00%
Corporate Debt Securities | Foreign Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	1.00%
Corporate Debt Securities | Foreign Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	37.00%
Other Debt Obligations | United States
Defined Benefit Plan Disclosure
Total investments	15.60%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	14.00%
Other Debt Obligations | United States | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	9.00%
Other Debt Obligations | United States | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	19.00%
Other Debt Obligations | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	40.60%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	44.00%
Other Debt Obligations | Foreign Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	26.00%
Other Debt Obligations | Foreign Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	65.00%
Defined Benefit Plan, Debt Security | United States
Defined Benefit Plan Disclosure
Total investments	44.50%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	46.00%
Defined Benefit Plan, Debt Security | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	46.50%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	45.00%
Real Estate Funds | United States
Defined Benefit Plan Disclosure
Total investments	14.80%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	16.00%
Real Estate Funds | United States | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	9.00%
Real Estate Funds | United States | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	23.00%
Real Estate Funds | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	4.80%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	6.00%
Real Estate Funds | Foreign Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	2.00%
Real Estate Funds | Foreign Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	8.00%
Other Investments [Member]
Defined Benefit Plan Disclosure
Total investments		15.20%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities		15.00%
Other Investments [Member] | United States
Defined Benefit Plan Disclosure
Total investments	2.10%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	1.00%
Other Investments [Member] | United States | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	0.00%
Other Investments [Member] | United States | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	5.00%
Other Investments [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	5.20%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	3.00%
Other Investments [Member] | Foreign Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	3.00%
Other Investments [Member] | Foreign Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	12.00%
Insurance product | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments	5.40%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	5.00%
Insurance product | Foreign Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	5.00%
Insurance product | Foreign Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	5.00%
Equity Securities, Canadian | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments		12.50%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities		12.50%
Defined Benefit Plan, Equity Securities, US | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments		5.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities		5.00%
Defined Benefit Plan, Equity Securities, Non-US | Foreign Plan [Member]
Defined Benefit Plan Disclosure
Total investments		22.50%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities		22.50%
Fixed Income Investments [Member]
Defined Benefit Plan Disclosure
Total investments		44.80%
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities		45.00%