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CAPITAL STOCK AND STOCK AWARD PLANS Summary of Stock Options Grants by Year of Grant (Detail) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options granted, net of forfeitures | 4,722,330
Weighted average grant date fair value | $ / shares | $ 13.52
Unvested options | 2,740,041
2011 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options granted, net of forfeitures | 894,254
Weighted average grant date fair value | $ / shares | $ 15.72
Unvested options | 352,850
2012 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options granted, net of forfeitures | 1,143,939
Weighted average grant date fair value | $ / shares | $ 13.15
Unvested options | 725,564
2013 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options granted, net of forfeitures | 1,405,906
Weighted average grant date fair value | $ / shares | $ 11.83
Unvested options | 702,953
2014 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options granted, net of forfeitures | 1,278,231
Weighted average grant date fair value | $ / shares | $ 14.17
Unvested options | 958,674
2015 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options granted, net of forfeitures | 1,428,531
Weighted average grant date fair value | $ / shares | $ 12.66
Unvested options | 1,428,531

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