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Stock-Based Compensation (Narrative) (Details) (USD $)
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6 Months Ended | 1 Months Ended | |||
|---|---|---|---|---|---|
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Mar. 30, 2012
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Mar. 30, 2012
Stock Options [Member]
Y
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Mar. 30, 2012
Restricted Stock Units [Member]
Y
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Jan. 30, 2005
Employee Stock Purchase Plan [Member]
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Jan. 30, 2005
Class A Common Stock [Member]
Employee Stock Purchase Plan [Member]
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| Stock options expected to vest | $ 61,500,000 | $ 57,900,000 | |||
| Employee stock options expected to be recognized over a weighted-average period, years | 2.79 | 3.08 | |||
| Period end stock price | $ 38.06 | ||||
| Percent of eligible compensation allowed to be withheld | 10.00% | ||||
| Maximum amount of common stock available for eligible employees | $ 25,000 | ||||
| Maximum number of common stock available for eligible employees, shares | 1,000 | ||||
| Percentage of Discount of closing price | 15.00% | ||||