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ACCOUNTS RECEIVABLE PROGRAMS (Activity of Deferred Purchase Price Receivables) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Nov. 30, 2018 | Nov. 30, 2017
Securitization or Asset-backed Financing Arrangement, Financial Asset for Which Transfer is Accounted as Sale [Roll Forward] |  |
Repayments of advances | $ 0 | $ 90,000
Deferred purchase price receivables |  |
Securitization or Asset-backed Financing Arrangement, Financial Asset for Which Transfer is Accounted as Sale [Roll Forward] |  |
Beginning balance |  | 215,123
Transfers of trade receivables |  | 656,642
Less: CPP |  | (492,432)
Non-cash increase to DPP |  | 164,210
Cash collections of DPP |  | (175,957)
Repayments of advances |  | 90,000
Net collections of DPP |  | (85,957)
Ending balance |  | 293,376
UNITED STATES | Deferred purchase price receivables |  |
Securitization or Asset-backed Financing Arrangement, Financial Asset for Which Transfer is Accounted as Sale [Roll Forward] |  |
Beginning balance |  | 135,623
Transfers of trade receivables |  | 535,893
Less: CPP |  | (404,337)
Non-cash increase to DPP |  | 131,556
Cash collections of DPP |  | (136,145)
Repayments of advances |  | 90,000
Net collections of DPP |  | (46,145)
Ending balance |  | 221,034
Poland | Deferred purchase price receivables |  |
Securitization or Asset-backed Financing Arrangement, Financial Asset for Which Transfer is Accounted as Sale [Roll Forward] |  |
Beginning balance |  | 79,500
Transfers of trade receivables |  | 120,749
Less: CPP |  | (88,095)
Non-cash increase to DPP |  | 32,654
Cash collections of DPP |  | (39,812)
Repayments of advances |  | 0
Net collections of DPP |  | (39,812)
Ending balance |  | $ 72,342

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- Definition Repayments Under Accounts Receivable Programs + References No definition available. + Details
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- Definition Securitization or Asset-backed Financing Arrangement, Financial Asset for Which Transfer is Accounted as Sale [Roll Forward] + References No definition available. + Details
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- Definition Transfer of Accounts Receivable, Deferred Purchase Price + References No definition available. + Details
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Namespace Prefix: | cmc_
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- Definition Transfer of Trade Receivables, Cash Collections of Deferred Purchase Price + References No definition available. + Details
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Namespace Prefix: | cmc_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Definition Transfer of Trade Receivables, Cash Purchase Price Received + References No definition available. + Details
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Namespace Prefix: | cmc_
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- Definition Transfer of Trade Receivables, Net Collections of Deferred Purchase Price + References No definition available. + Details
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- Definition Transfers of Trade Receivables, Noncash Increase to Deferred Purchase Price + References No definition available. + Details
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Namespace Prefix: | cmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition It represents net transfer of customer accounts receivable during the period under the sale of accounts receivable programs. + References No definition available. + Details
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- Details
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- Details
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- Details
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