Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS (Details 7)

v3.19.3.a.u2
EMPLOYEE BENEFIT PLANS (Details 7)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   100.00% 100.00%
Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 100.00%    
Cash and Cash Equivalents [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   72.30% 3.50%
Cash and Cash Equivalents [Member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Cash and Cash Equivalents [Member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 100.00%    
Common Stock [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   0.00% 0.40%
Common Stock [Member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Common Stock [Member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 40.00%    
Domestic equity - all other [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   3.80% 0.70%
Domestic equity - all other [Member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Domestic equity - all other [Member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 40.00%    
International equity [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   1.90% 0.20%
International equity [Member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
International equity [Member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 30.00%    
Fixed Income Funds [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   2.10% 91.10%
Fixed Income Funds [Member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Fixed Income Funds [Member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 100.00%    
Real Estate [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   9.50% 2.00%
Real Estate [Member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Real Estate [Member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 20.00%    
Alternative/Opportunistic/Special [member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Percentage of plan assets   10.40% 2.10%
Alternative/Opportunistic/Special [member] | Minimum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 0.00%    
Alternative/Opportunistic/Special [member] | Maximum [Member]      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Target allocation 20.00%