Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - STOCK BASED INCENTIVE PLAN (Details)

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EMPLOYEE BENEFIT PLANS - STOCK BASED INCENTIVE PLAN (Details) - shares
shares in Millions
Dec. 31, 2017
May 05, 2016
STOCK-BASED COMPENSATION PLAN    
Authorized number of shares to be granted under the Stock Incentive Plan 8.2 8.2
Remaining shares available for grant 8.0  
the "Prior Plan"    
STOCK-BASED COMPENSATION PLAN    
Remaining shares available for grant   0.0