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STOCK COMPENSATION (Tables)
3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Based Compensation
Total stock based compensation expense for non-qualified stock options, restricted stock units ("RSU"), and the tax related benefit for the three months ended March 31, 2021 and 2020 were as follows:
Three Months Ended
(in millions)20212020
Stock option expense$$
RSU expense11 
Total stock based compensation expense$13 $
Related deferred income tax benefit$$