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Share-Based Compensation Plans - Summary of Activity Related to Stock Options Granted under Company's Incentive Plan (Parenthetical) (Detail)	Dec. 31, 2015 $ / shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Value of closing stock price	$ 40.12

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- Definition

Price of a single share of a number of saleable stocks of a company.

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