XML 75 R60.htm IDEA: XBRL DOCUMENT
v3.22.2.2

REVENUE RECOGNITION - Revenue Recognition Method (Details) - North America Segment - Recognized over Time | 12 Months Ended
--- | ---
Aug. 31, 2022 | Aug. 31, 2021 | Aug. 31, 2020
Fabricated Product and Installation Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contract as percent of total segment revenue (percent) | 8.00% | 10.00% | 12.00%
Fabricated Product without Installation Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contract as percent of total segment revenue (percent) | 9.00% | 9.00% | 1100.00%

X
- Definition Contract with Customer, Contract as Percent of Total Revenue + References No definition available. + Details
Name: | cmc_ContractwithCustomerContractasPercentofTotalRevenue
Namespace Prefix: | cmc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cmc_NorthAmericaSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cmc_FabricatedProductandInstallationServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TimingOfTransferOfGoodOrServiceAxis=us-gaap_TransferredOverTimeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cmc_FabricatedProductwithoutInstallationServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |