XML 89 R109.htm IDEA: XBRL DOCUMENT v3.19.3

BUSINESS SEGMENTS (External Net Sales from Continuing Operations by Major Product) (Details) - USD ($) $ in Thousands	3 Months Ended															12 Months Ended
	Aug. 31, 2019	[1]	May 31, 2019	[1]	Feb. 28, 2019	[1]	Nov. 30, 2018	[1]	Aug. 31, 2018	May 31, 2018	[1]	Feb. 28, 2018	[1]	Nov. 30, 2017	[1]	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Entity-Wide Information, Revenue from External Customer [Line Items]
Net sales	$ 1,543,005		$ 1,605,872		$ 1,402,783		$ 1,277,342		$ 1,308,438	$ 1,204,484		$ 1,054,268		$ 1,076,533		$ 5,829,002	$ 4,643,723	$ 3,844,069
Steel products
Entity-Wide Information, Revenue from External Customer [Line Items]
Net sales																4,481,622	3,114,227	2,584,359
Nonferrous scrap
Entity-Wide Information, Revenue from External Customer [Line Items]
Net sales																518,687	630,609	506,220
Ferrous scrap
Entity-Wide Information, Revenue from External Customer [Line Items]
Net sales																447,530	550,602	413,441
Construction materials
Entity-Wide Information, Revenue from External Customer [Line Items]
Net sales																259,685	249,538	228,910
Other
Entity-Wide Information, Revenue from External Customer [Line Items]
Net sales																$ 121,478	$ 98,747	$ 111,139
[1] Excludes discontinued operations.

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

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

+ Details

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

X

- Details

Name:	srt_ProductOrServiceAxis=cmc_SteelProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=cmc_NonferrousScrapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=cmc_FerrousScrapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=cmc_ConstructionMaterialsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=cmc_OtherProductMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: