|
Stockholders' Equity (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
1 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | ||
|---|---|---|---|---|---|---|
|
Nov. 30, 2009
|
Mar. 30, 2012
|
Mar. 30, 2012
|
Feb. 29, 2012
Additional Stock Approved [Member]
|
Jul. 31, 2011
Additional Stock Approved [Member]
|
Jul. 31, 2010
Additional Stock Approved [Member]
|
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| Stockholders' Equity [Line Items] | ||||||
| Stock authorized for repurchase | $ 250.0 | $ 900.0 | $ 100.0 | $ 250.0 | $ 300.0 | |
| Remaining authorization, additional shares available for purchase | $ 380.2 | |||||