Quarterly report pursuant to Section 13 or 15(d)

NET INCOME PER SHARE - INFORMATION ON STOCK-BASED AWARDS (Details)

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NET INCOME PER SHARE - INFORMATION ON STOCK-BASED AWARDS (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Outstanding stock-based awards        
Antidilutive shares not included in the computation of income (loss) per share        
Weighted average equivalent shares 0.6 2.0 0.8 2.1