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SHAREHOLDER'S EQUITY (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Schedule of Treasury Stock by Class [Table Text Block]
Share repurchase activity (in millions, except shares):
 
2018
 
2017
 
2016
 
Shares
 
Amount
 
Shares
 
Amount
 
Shares
 
Amount
2015 Repurchase Program – $1 billion
776,186

 
$
50

 
981,277

 
$
75

 
2,594,809

 
$
193
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
AOCL consisted of the following (in millions, net of tax):  
 
2018
 
2017
Related to marketable securities
$
(11
)
 
$
(5
)
Related to employee benefit plans
(440
)
 
(376
)
Related to interest rate derivatives
3

 
1

 
$
(448
)
 
$
(380
)

The Company adopted ASU 2018-02 in 2018. As a result, the Company reclassified approximately $62 million of tax effects in AOCL recorded in prior periods at previously enacted tax rates thus increasing Retained earnings.

In relation to the Tax Cuts and Jobs Act, amounts recognized in other comprehensive income subsequent to the December 22, 2017 enactment date, are taxed at the revised federal income tax rates. The Company's actuarial adjustments for employee benefit plans occur annually at December 31, and therefore are tax effected at the new lower rates. Accordingly, the effective tax rate for employee benefit plan amounts recognized in other comprehensive income at December 31, 2017 was lower than it historically has been.