XML 70 R59.htm IDEA: XBRL DOCUMENT
v3.19.2

CREDIT ARRANGEMENTS (Narrative) (Details) | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
May 31, 2019 USD ($) | May 31, 2019 PLN (zł) | Aug. 31, 2018 USD ($) | Jul. 31, 2017 USD ($) | May 31, 2013 USD ($)
CMCP |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Revolving credit facility current borrowing capacity | $ 71,700,000 | zł 275,000,000.0 |  |  |
Revolving credit facility, amount drawn | 0 |  | $ 0 |  |
Stand by letters of credit outstanding amount | 1,300,000 |  | 1,100,000 |  |
Revolving credit facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Revolving credit facility current borrowing capacity | 350,000,000.0 |  |  |  |
Revolving credit facility, maximum borrowing capacity | 600,000,000.0 |  |  |  |
Revolving credit facility, amount drawn | $ 0 |  | 0 |  |
Minimum interest coverage ratio | 2.50 |  |  |  |
Maximum debt to capitalization ratio | 0.60 |  |  |  |
Actual interest coverage ratio | 5.53 | 5.53 |  |  |
Actual debt to capitalization ratio | 0.47 | 0.47 |  |  |
Stand-by letters of credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Revolving credit facility current borrowing capacity | $ 50,000,000.0 |  |  |  |
Stand by letters of credit outstanding amount | 3,000,000.0 |  | 3,300,000 |  |
U.S. Program |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Transfer of accounts receivable program limit | 200,000,000.0 |  |  |  |
U.S. Program with Consent of CMCRV and Program Administrative Agent |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Transfer of accounts receivable program limit | 300,000,000.0 |  |  |  |
Poland Program |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Transfer of accounts receivable program limit | $ 57,400,000 | zł 220,000,000.0 |  |  |
Advance limit as percent of eligible trade accounts receivable transferred (percent) | 90.00% | 90.00% |  |  |
Advances outstanding under transfer of receivables programs | $ 25,300,000 |  | $ 12,100,000 |  |
2027 Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 300,000,000.0 |
Weighted average interest rate | 5.375% | 5.375% |  | 5.375% |
2026 Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount | $ 350,000,000.0 |  |  |  |
Weighted average interest rate | 5.75% | 5.75% |  |  |
2023 Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 330,000,000.0
Weighted average interest rate | 4.875% | 4.875% |  |  | 4.875%
Term Loans | Revolving credit facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Weighted average interest rate | 4.115% | 4.115% |  |  |
Periodic payments, as percent of original principal amount (percent) | 1.25% |  |  |  |
Term Loans | 2022 Term Loan | Revolving credit facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount | $ 150,000,000.0 |  |  |  |
Term Loans | 2018 Term Loan | Revolving credit facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, face amount | $ 180,000,000.0 |  |  |  |

X
- Definition Advance Limit as Percent of Eligible Trade Accounts Receivable Transferred + References No definition available. + Details
Name: | cmc_AdvanceLimitasPercentofEligibleTradeAccountsReceivableTransferred
Namespace Prefix: | cmc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition It represents actual debt to capitalization ratio for an applicable date. + References No definition available. + Details
Name: | cmc_DebttoCapitalizationRatio
Namespace Prefix: | cmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition It represents actual interest coverage ratio for an applicable date. + References No definition available. + Details
Name: | cmc_InterestCoverageRatio
Namespace Prefix: | cmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition It represents maximum debt to capitalization ratio stated in the debt covenant. + References No definition available. + Details
Name: | cmc_MaximumDebttoCapitalizationRatio
Namespace Prefix: | cmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition This represents minimum interest coverage ratio applicable to current period stated in debt covenant. + References No definition available. + Details
Name: | cmc_MinimumInterestCoverageRatio
Namespace Prefix: | cmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Periodic Payments, as Percent of Original Principal Amount + References No definition available. + Details
Name: | cmc_PeriodicPaymentsasPercentofOriginalPrincipalAmount
Namespace Prefix: | cmc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Transfer of Accounts Receivable Program, Face Amount + References No definition available. + Details
Name: | cmc_TransferofAccountsReceivableProgramFaceAmount
Namespace Prefix: | cmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Transfers of Accounts Receivable Outstanding + References No definition available. + Details
Name: | cmc_TransfersofAccountsReceivableOutstanding
Namespace Prefix: | cmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
Name: | us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Weighted average interest rate of long-term debt outstanding calculated at point in time. + References No definition available. + Details
Name: | us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=cmc_CmcpMember
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_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cmc_U.S.ProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cmc_U.S.ProgramwithConsentofCMCRVandProgramAdministrativeAgentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cmc_PolandProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cmc_A2022TermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cmc_A2018TermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |