XML 127 R75.htm IDEA: XBRL DOCUMENT v3.19.3

CREDIT ARRANGEMENTS (Narrative) (Details)	9 Months Ended	12 Months Ended
	May 31, 2018 USD ($)	Aug. 31, 2019 USD ($)	Aug. 31, 2018 USD ($)	Aug. 31, 2017 USD ($)	Aug. 31, 2019 PLN (zł)	May 31, 2019 USD ($)	Aug. 31, 2018 PLN (zł)	Jul. 31, 2017 USD ($)	Jun. 26, 2014 USD ($)	May 31, 2013 USD ($)
Debt Instrument [Line Items]
Interest costs capitalized		$ 300,000	$ 7,300,000	$ 9,800,000
CMCP
Debt Instrument [Line Items]
Maximum borrowing capacity		69,000,000.0	60,800,000		zł 275,000,000.0		zł 225,000,000.0
Stand by letters of credit outstanding amount		1,100,000	1,100,000
Revolving line of credit outstanding amount		0	0
Borrowings under uncommitted lines of credit		0	0	0
Repayments of uncommitted credit lines		0	0	$ 0
Revolving credit agreement
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 350,000,000.0
Revolving credit facility, maximum borrowing capacity		$ 600,000,000.0
Minimum interest coverage ratio		2.50
Maximum debt to capitalization ratio		0.60
Actual interest coverage ratio		5.93			5.93
Actual debt to capitalization ratio		0.44			0.44
Stand-by letters of credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 50,000,000.0
Stand by letters of credit outstanding amount		$ 3,000,000.0	$ 3,300,000
2027 Notes
Debt Instrument [Line Items]
Weighted average interest rate		5.375%			5.375%			5.375%
Term loan, maximum principal amount								$ 300,000,000.0
2026 Notes
Debt Instrument [Line Items]
Weighted average interest rate		5.75%			5.75%	5.75%
Term loan, maximum principal amount						$ 350,000,000.0
Debt issuance costs	$ 5,300,000
2023 Notes
Debt Instrument [Line Items]
Weighted average interest rate		4.875%			4.875%					4.875%
Term loan, maximum principal amount										$ 330,000,000.0
Term Loan | Revolving credit agreement
Debt Instrument [Line Items]
Weighted average interest rate		4.111%			4.111%
Term loan, maximum principal amount		$ 150,000,000.0
U.S. Program
Debt Instrument [Line Items]
Transfer of Accounts Receivable Program, Face Amount		$ 200,000,000.0
U.S. Program | Short-term borrowings
Debt Instrument [Line Items]
Weighted average interest rate		3.461%			3.461%
Poland Program
Debt Instrument [Line Items]
Transfer of Accounts Receivable Program, Face Amount		$ 55,200,000			zł 220,000,000.0
Advance Limit as Percent of Eligible Trade Accounts Receivable Transferred		90.00%			90.00%
Transfers of Accounts Receivable Outstanding		$ 3,900,000
Poland Program | Short-term borrowings
Debt Instrument [Line Items]
Weighted average interest rate		2.41%			2.41%
Term Loan A Facility | Revolving credit agreement
Debt Instrument [Line Items]
Quarterly payments, as percent of original principal amount (percent)	1.25%
U.S. Program with Consent of CMCRV and Program Administrative Agent
Debt Instrument [Line Items]
Transfer of Accounts Receivable Program, Face Amount		$ 300,000,000.0

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

Amount, before 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 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

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

X

- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

Name:	us-gaap_InterestCostsCapitalized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: 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(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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_LineOfCredit
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

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ 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=109223946&loc=d3e3291-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

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_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_U.S.ProgramMember
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_DebtInstrumentAxis=cmc_PolandProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=cmc_TermLoanAFacilityMember
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: