XML 80 R69.htm IDEA: XBRL DOCUMENT
v3.19.1

FAIR VALUE (Financial Assets and Liabilities Not Required to Be Measured at Fair Value) (Details) - USD ($) $ in Thousands | Feb. 28, 2019 | Aug. 31, 2018
--- | --- | ---
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | $ 1,410,164 | $ 1,170,129
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 | Carrying Value |  |
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 | 284,823 | 281,655
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 | Carrying Value |  |
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 | 344,670 | 339,238
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 | Carrying Value |  |
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 | 326,806 | 326,090
Short-term borrowings |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 59,473 | 0
Short-term borrowings | Level 2 | Carrying Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 59,473 | 0
Short-term borrowings | Level 2 | Fair Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 59,473 | 0
Revolving credit facility | Term Loans |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 314,250 | 142,500
Revolving credit facility | Term Loans | Level 2 | Carrying Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | 314,250 | 142,500
Revolving credit facility | Term Loans | Level 2 | Fair Value |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Financial liabilities | $ 314,250 | $ 142,500

X
- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + 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=6879938&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_CarryingReportedAmountFairValueDisclosureMember
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: |