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SHAREHOLDER'S EQUITY (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
AOCL consisted of the following (in millions, net of tax):  
 20202019
Related to marketable securities$23 $
Related to employee benefit plans(498)(469)
Related to interest rate derivatives(19)(5)
 $(494)$(465)