XML 39 R59.htm IDEA: XBRL DOCUMENT
v3.20.1

FAIR VALUE (Financial Assets and Liabilities Not Required to Be Measured at Fair Value) (Details) - USD ($) $ in Thousands | May 31, 2020 | Aug. 31, 2019
--- | --- | ---
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | $ 1,180,074 | $ 1,254,921
2027 Notes |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 300,000 | 300,000
2027 Notes | Level 2 | Fair Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 300,495 | 303,810
2026 Notes |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 350,000 | 350,000
2026 Notes | Level 2 | Fair Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 358,145 | 363,444
2023 Notes |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 330,000 | 330,000
2023 Notes | Level 2 | Fair Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 334,970 | 342,098
Short-term borrowings |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 2,765 | 3,929
Short-term borrowings | Level 2 | Fair Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 2,765 | 3,929
Revolving credit facility | Term Loan |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 110,125 | 210,125
Revolving credit facility | Poland credit facilities |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | $ 22,350 | $ 0

X
- Definition Amount of short-term and long-term debt and lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
Name: | us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cmc_A300MillionNotesat5.375dueJuly2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cmc_A350millionnotesat5.75dueApril2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cmc_A330MillionNotesAt4875DueMay2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ShortTermDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_MediumTermNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cmc_PolandCreditFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |