Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Narrative (Details)

v3.19.3.a.u2
BENEFIT PLANS - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]        
Employer Contributions   $ 0    
Defined Contribution Plan, Cost   51 $ 46 $ 35
Defined Benefit Plan, Plan Assets, Amount $ 931 931 828  
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated benefit obligations in excess of plan assets, aggregate projected benefit obligation $ 8 8    
Defined benefit plan expenses   3 2 2
Estimated net periodic pension cost in next fiscal year   4    
Average duration of plan assets investment in bonds, years 15 years 10 months 24 days      
Estimated life of benefit obligations 13 years      
Defined Benefit Plan, Plan Assets, Amount $ 931 $ 931 $ 828 $ 903
Pension Benefits | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Actual plan asset allocations 17.00% 17.00%    
Pension Benefits | Bonds        
Defined Benefit Plan Disclosure [Line Items]        
Actual plan asset allocations 82.00% 82.00%    
Pension Benefits | Cash and cash equivalents        
Defined Benefit Plan Disclosure [Line Items]        
Actual plan asset allocations 1.00% 1.00%    
Minimum | Pension Benefits | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 20.00% 20.00%    
Minimum | Pension Benefits | Bonds        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00% 50.00%    
Maximum | Pension Benefits | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 50.00% 50.00%    
Maximum | Pension Benefits | Bonds        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 80.00% 80.00%