Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Narrative (Details)

v3.10.0.1
BENEFIT PLANS - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]        
Employer Contributions   $ 0    
Defined Contribution Plan, Cost   46 $ 35 $ 36
Defined Benefit Plan, Plan Assets, Amount $ 828 828 903  
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated benefit obligations in excess of plan assets, aggregate projected benefit obligation $ 7 7    
Defined benefit plan expenses   2 2 2
Estimated net periodic pension cost in next fiscal year   3    
Average duration of plan assets investment in bonds, years 12 years 8 months      
Estimated life of benefit obligations 12 years 5 months      
Defined Benefit Plan, Plan Assets, Amount $ 828 $ 828 $ 903 $ 841
Pension Benefits | Equity Securities [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Actual plan asset allocations 27.00% 27.00%    
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description .50      
Pension Benefits | Bonds        
Defined Benefit Plan Disclosure [Line Items]        
Actual plan asset allocations 72.00% 72.00%    
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, Investment Policy and Strategy, Description .20      
Minimum | Pension Benefits | Bonds        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description .5      
Maximum | Pension Benefits | Bonds        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description .80