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Stockholders' Equity - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Nov. 30, 2012
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Mar. 31, 2012
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Nov. 30, 2011
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Feb. 28, 2011
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Sep. 30, 2010
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Jan. 11, 2010
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Feb. 02, 2013
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Jan. 28, 2012
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Jan. 29, 2011
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Jan. 30, 2010
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Feb. 08, 2012
First Quarter
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Feb. 08, 2012
Second Quarter
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Feb. 08, 2012
Third Quarter
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Feb. 08, 2012
Fourth Quarter
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Mar. 25, 2013
Share Repurchase
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Nov. 30, 2012
Share Repurchase
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Feb. 18, 2013
Subsequent Event
Dividend Declared
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Feb. 18, 2013
Subsequent Event
Dividend Paid
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Feb. 02, 2013
Series A Preferred Stock
Vote
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Feb. 02, 2013
Minimum
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| Stockholders Equity Note [Line Items] | ||||||||||||||||||||
| Percentage of voting power of outstanding common stock a person or group should acquire to exercise the right | 15.00% | |||||||||||||||||||
| Purchase price per one, one-thousandth of a share | $ 100.00 | |||||||||||||||||||
| Percentage of voting interest | 50.00% | |||||||||||||||||||
| Stock redemption price per Right | $ 0.01 | |||||||||||||||||||
| Preferred stock, par value | $ 0.001 | |||||||||||||||||||
| Preferred stock, authorized | 5,000,000 | 5,000,000 | 500,000 | |||||||||||||||||
| Preferred stock, dividend payment | Preferred dividend equal to the greater of $1.00 or one thousand times any dividend declared on the Company's common stock. | |||||||||||||||||||
| Preferred liquidation payment | $ 1,000.00 | |||||||||||||||||||
| Votes per share | 10,000 | |||||||||||||||||||
| Preferred stock, outstanding | 0 | 0 | 0 | |||||||||||||||||
| Share repurchase program, authorized amount | $ 500 | $ 500 | $ 500 | $ 300 | $ 300 | $ 500 | ||||||||||||||
| Share repurchase program, remaining authorized amount | 400.0 | 253.4 | 180.1 | 138.4 | 425.3 | 241.6 | ||||||||||||||
| Number of shares repurchased | 19,900,000 | 11,200,000 | 17,100,000 | 1,000,000 | ||||||||||||||||
| Number of shares repurchased, average price per share | $ 20.60 | $ 21.38 | $ 19.84 | $ 25.06 | ||||||||||||||||
| Treasury share repurchases that were not settled | $ 0.1 | $ 22.0 | $ 64.6 | |||||||||||||||||
| Cash dividend | $ 0.80 | $ 0.15 | $ 0.15 | $ 0.25 | $ 0.25 | $ 0.275 | ||||||||||||||
| Cash dividend, payment date | Mar. 12, 2012 | Jun. 12, 2012 | Sep. 12, 2012 | Dec. 12, 2012 | Mar. 19, 2013 | |||||||||||||||
| Cash dividend, date of record | Mar. 05, 2013 | |||||||||||||||||||