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Acquisitions - Narrative (Details) (Series of Individually Immaterial Business Acquisitions [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Aug. 31, 2014 | Aug. 31, 2013
Series of Individually Immaterial Business Acquisitions [Member] |  |
Business Acquisition [Line Items] |  |
Payments to Acquire Assets, Investing Activities | $ 281.5 | $ 12.7

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- Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate cash payments for a combination of transactions that are classified as investing activities in which assets, which may include securities, other types of investments, or productive assets, are purchased from third-party sellers. This element can be used by entities to aggregate payments for all asset purchases that are classified as investing activities. + References No definition available. + Details
Name: | us-gaap_PaymentsToAcquireAssetsInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration