|
Stock-based Compensation and Stock Plans (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Feb. 28, 2014
|
Feb. 28, 2013
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Feb. 28, 2014
management_dividend_award
|
Feb. 28, 2013
|
May 31, 2013
|
Jul. 31, 2012
Stock Options [Member]
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Jul. 30, 2012
Stock Options [Member]
|
Jul. 31, 2012
Restricted Stock Units [Member]
|
Jul. 30, 2012
Restricted Stock Units [Member]
|
Feb. 28, 2014
2012 Restricted Stock Unit Plan [Member]
Restricted Stock Units [Member]
Installment
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Stock-based compensation expense recognized | $ 5.5 | $ 5.8 | $ 14.7 | $ 32.3 | ||||||
| Purchase of aggregate shares of common stock | 29,821,500 | 3,665,000 | ||||||||
| Stock based compensation, new options granted | 29,821,500 | |||||||||
| Stock based compensation, restricted stock units granted | 10,795,000 | |||||||||
| Exercise price for stock options decreased to current fair value | $ 7.88 | $ 7.88 | ||||||||
| Vesting schedule in excess of original vesting schedule | 2 years | |||||||||
| Management dividend awards vested per each restricted stock unit | 1 | |||||||||
| Common stock, par value | $ 0.01 | $ 0.01 | $ 0.01 | |||||||
| Maximum number of shares of common stock | 14,000,000 | 14,000,000 | ||||||||
| Number of installments | 3 | |||||||||
| Vesting period | 2 years | |||||||||
| Options were exercise price was modified | 3,193,167 | |||||||||