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FAIR VALUE MEASUREMENTS (Tables)
3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Measured and Recorded at Fair Value Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following (in millions):
 
 
March 31, 2019
 
December 31, 2018
 
 
Total
 
Level 1
 
Level 2
 
Total
 
Level 1
 
Level 2
Assets
 
 
 
 
 
 
 
 
Mutual funds
 
$
984

 
$
984

 
$

 
$
978

 
$
978

 
$

U.S. Government securities
 
112

 

 
112

 
105

 

 
105

Other securities
 
180

 
65

 
115

 
144

 
28

 
116

Derivatives
 
20

 

 
20

 
22

 

 
22

Liabilities
 
 
 
 
 
 
 
 
 
 
 
 
Derivatives
 
78

 

 
78

 
61

 

 
61

Assets measured at NAV (a)
 
 
 
 
 
 
 
 
 
 
 
 
Other commingled funds
 
19

 
 
 
 
 
18

 
 
 
 
(a) 
Net Asset Value (NAV) is the total value of the fund divided by the number of the fund’s shares outstanding.