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STOCK-BASED AWARD PLANS (Tables)
6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Compensation Expense Related to Stock-Based Awards
Compensation expense related to our stock-based awards was as follows (in millions):
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Stock-based compensation expense $$$18 $14 
Unrecognized Stock-based Compensation Expense
Unrecognized stock-based compensation expense and weighted-average years to be recognized are as follows (in millions, except for weighted average years):
 June 30, 2021
 Unrecognized stock-based compensationWeighted-average years to be recognized
Restricted stock units$15 1.6
Performance awards$2.0
Stock options$1.6