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EMPLOYEE BENEFIT PLANS (Tables)
 9 Months Ended
Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs
et periodic benefit costs recognized included the following components for the three and nine months ended September 30, 2016 (in millions). Amounts recognized in relation to all other plans were immaterial to the quarter. 
 
Qualified Defined - Benefit Plans
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
Service cost
$
9

 
$
11

 
$
27

 
$
31

Interest cost
18

 
21

 
55

 
63

Expected return on assets
(27
)
 
(31
)
 
(81
)
 
(92
)
Amortization of prior service costs
(1
)
 
(1
)
 
(1
)
 
(1
)
Recognized actuarial loss (gain)
7

 
7

 
19

 
20

Total
$
6

 
$
7

 
$
19

 
$
21