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SHAREHOLDERS' EQUITY (Tables)
 6 Months Ended
Jun. 30, 2019
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Components of accumulated other comprehensive loss, net of tax (in millions):
 
June 30, 2019
 
December 31, 2018
Related to marketable securities
$
11

 
$
(11
)
Related to employee benefit plans
(428
)
 
(440
)
Related to interest rate derivatives
(5
)
 
3

Total
$
(422
)
 
$
(448
)