XML 61 R49.htm IDEA: XBRL DOCUMENT v3.21.2

CREDIT ARRANGEMENTS (Narrative) (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2021 USD ($)	May 31, 2021 USD ($)	May 31, 2020 USD ($)	May 31, 2021 USD ($)	May 31, 2020 USD ($)	May 31, 2021 PLN (zł)	Apr. 01, 2021 USD ($)	Feb. 28, 2021 PLN (zł)	Aug. 31, 2020 USD ($)	Aug. 31, 2020 PLN (zł)
Debt Instrument [Line Items]
Financial liabilities		$ 1,085,368,000		$ 1,085,368,000					$ 1,092,266,000
Less debt issuance costs		8,504,000		8,504,000					8,581,000
Loss on debt extinguishment		0	$ 0	(16,841,000)	$ 0
Advances outstanding under transfer of receivables programs		28,900,000		28,900,000		zł 105,900,000
2026 Notes
Debt Instrument [Line Items]
Early Repayment of Senior Debt	$ 77,800,000
Financial liabilities		$ 0		$ 0					$ 350,000,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time		5.75%		5.75%		5.75%			5.75%	5.75%
Loss on debt extinguishment	16,800,000
2031 Notes
Debt Instrument [Line Items]
Financial liabilities		$ 300,000,000		$ 300,000,000					$ 0
Long-term Debt, Weighted Average Interest Rate, at Point in Time		3.875%		3.875%		3.875%
Less debt issuance costs		$ 4,900,000		$ 4,900,000
CMCP
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity		68,300,000		68,300,000		zł 250,000,000.0		zł 275,000,000.0
CMCP | Poland Term Loan
Debt Instrument [Line Items]
Stand by letters of credit outstanding amount		900,000		900,000					800,000
Term loan, maximum principal amount		13,700,000		13,700,000		50,000,000.0
Financial liabilities		54,600,000		54,600,000		zł 200,000,000.0			40,700,000	zł 150,000,000.0
Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility, amount drawn		0		0					0
Revolving credit facility | Poland Term Loan
Debt Instrument [Line Items]
Financial liabilities		$ 54,606,000		$ 54,606,000					$ 40,713,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time		1.71%		1.71%		1.71%
Stand-by letters of credit
Debt Instrument [Line Items]
Stand by letters of credit outstanding amount		$ 3,000,000.0		$ 3,000,000.0
Poland Program
Debt Instrument [Line Items]
Transfer of accounts receivable program limit		60,100,000		60,100,000		zł 220,000,000.0
The Revolver Maturity Date in March 2026 | Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity		400,000,000.0		400,000,000.0
Revolving Credit Facility Maturity Date in June 2022 | Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity		$ 350,000,000.0		$ 350,000,000.0
U.S. Program
Debt Instrument [Line Items]
Transfer of accounts receivable program limit	$ 200,000,000						$ 150,000,000

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

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=120398452&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=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
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=119993939&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

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ 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 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_EarlyRepaymentOfSeniorDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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=120391452&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=121572278&loc=d3e13433-108611

+ Details

Name:	us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
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:	us-gaap_LongtermDebtTypeAxis=cmc_A350MillionNotesAt5750DueApril2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=cmc_A300MillionNotesAt3875DueFebruary2031Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=cmc_CmcpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=cmc_PolandTermLoanMember
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_PolandProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=cmc_TheRevolverMaturityDateInMarch2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=cmc_RevolvingCreditFacilityMaturityDateInJune2022Member
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: