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Interim Financial Information - Additional Information (Detail) (Parking, USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Apr. 30, 2012
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Apr. 30, 2011
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Apr. 30, 2012
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Apr. 30, 2011
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Parking
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| Organization and Principal Activities [Line Items] | ||||
| Revenues related solely to the reimbursement of expenses | $ 76.3 | $ 78.1 | $ 154.1 | $ 151.5 |