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Summary of Significant Accounting Policies Parenthetical (Details) (USD $) In Millions, unless otherwise specified | Feb. 28, 2014 | Aug. 31, 2013 | Feb. 28, 2013
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Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative Instruments, tax effect of unrealized gain or loss deferred into accumulated other comprehensive income | $ 0 | $ 0 | $ 0

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- Definition Derivative Instruments, tax effect of unrealized gain or loss of instruments designated as cash flow hedges deferred into accumulated other comprehensive income + References No definition available. + Details
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Namespace Prefix: | chscp_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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