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EMPLOYEE BENEFITS (Tables)
 6 Months Ended
Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of net periodic (income) cost
The following table presents the components of net periodic (income) cost for the Company’s qualified and non-qualified plans:
 
Six Months Ended June 30,
 
Qualified Plan
 
Non-Qualified Plan
 
Total
(in millions)
2016

 
2015

 
2016

 
2015

 
2016

 
2015

Service cost

$2

 

$2

 

$—

 

$—

 

$2

 

$2

Interest cost
22

 
22

 
2

 
2

 
24

 
24

Expected return on plan assets
(34
)
 
(37
)
 
—

 
—

 
(34
)
 
(37
)
Amortization of actuarial loss
7

 
6

 
1

 
1

 
8

 
7

Net periodic pension (income) cost

($3
)
 

($7
)
 

$3

 

$3

 

$—

 

($4
)