XML 31 R66.htm IDEA: XBRL DOCUMENT v3.19.3

REVENUE RECOGNITION - Disaggregation of Revenue (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
Disaggregation of Revenue [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
Disaggregation of Revenue [Line Items]
Net sales																4,481,622	3,114,227	2,584,359
Ferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																447,530	550,602	413,441
Nonferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																518,687	630,609	506,220
Construction materials
Disaggregation of Revenue [Line Items]
Net sales																259,685	249,538	228,910
Other
Disaggregation of Revenue [Line Items]
Net sales																121,478	98,747	111,139
Americas Recycling
Disaggregation of Revenue [Line Items]
Net sales																908,451	1,117,714	865,462
Americas Recycling | Steel products
Disaggregation of Revenue [Line Items]
Net sales																814	1,166	470
Americas Recycling | Ferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																412,456	516,133	383,164
Americas Recycling | Nonferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																493,225	598,970	480,676
Americas Recycling | Construction materials
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
Americas Recycling | Other
Disaggregation of Revenue [Line Items]
Net sales																1,956	1,445	1,152
Americas Mills
Disaggregation of Revenue [Line Items]
Net sales																1,882,994	1,204,181	917,689
Americas Mills | Steel products
Disaggregation of Revenue [Line Items]
Net sales																1,763,017	1,099,286	825,778
Americas Mills | Ferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																33,716	33,154	29,193
Americas Mills | Nonferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																14,453	17,714	15,917
Americas Mills | Construction materials
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
Americas Mills | Other
Disaggregation of Revenue [Line Items]
Net sales																71,808	54,027	46,801
Americas Fabrication
Disaggregation of Revenue [Line Items]
Net sales																2,209,671	1,416,572	1,364,826
Americas Fabrication | Steel products
Disaggregation of Revenue [Line Items]
Net sales																1,936,994	1,160,373	1,126,919
Americas Fabrication | Ferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																8	27	4
Americas Fabrication | Nonferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
Americas Fabrication | Construction materials
Disaggregation of Revenue [Line Items]
Net sales																259,685	249,538	228,910
Americas Fabrication | Other
Disaggregation of Revenue [Line Items]
Net sales																12,984	6,634	8,993
International Mill
Disaggregation of Revenue [Line Items]
Net sales																815,723	885,919	636,402
International Mill | Steel products
Disaggregation of Revenue [Line Items]
Net sales																780,797	853,402	603,925
International Mill | Ferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																1,350	1,288	1,080
International Mill | Nonferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																11,009	13,925	9,627
International Mill | Construction materials
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
International Mill | Other
Disaggregation of Revenue [Line Items]
Net sales																22,567	17,304	21,770
Corporate
Disaggregation of Revenue [Line Items]
Net sales																12,163	19,337	59,690
Corporate | Steel products
Disaggregation of Revenue [Line Items]
Net sales																0	0	27,267
Corporate | Ferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
Corporate | Nonferrous scrap
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
Corporate | Construction materials
Disaggregation of Revenue [Line Items]
Net sales																0	0	0
Corporate | Other
Disaggregation of Revenue [Line Items]
Net sales																$ 12,163	$ 19,337	$ 32,423
[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_DisaggregationOfRevenueLineItems
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_FerrousScrapMember
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_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:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cmc_AmericasRecyclingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cmc_AmericasMillsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cmc_AmericasFabricationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cmc_InternationalMillsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: