XML 191 R110.htm IDEA: XBRL DOCUMENT
v3.20.2

BUSINESS SEGMENTS (External Net Sales from Continuing Operations by Major Product) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2020 | [1] | May 31, 2020 | [1] | Feb. 29, 2020 | [1] | Nov. 30, 2019 | [1] | Aug. 31, 2019 | May 31, 2019 | [1] | Feb. 28, 2019 | [1] | Nov. 30, 2018 | [1] | Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 1,409,132 | $ 1,341,683 | $ 1,340,963 | $ 1,384,708 | $ 1,543,005 | $ 1,605,872 | $ 1,402,783 | $ 1,277,342 | $ 5,476,486 | $ 5,829,002 | $ 4,643,723
Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 5,476,486 | 5,829,002 | 4,643,723
Intersegment |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
North America | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 4,769,933 | 5,001,116 | 3,738,493
Europe | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 699,140 | 817,048 | 887,038
Europe | Intersegment |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,509 | 1,325 | 1,119
Corporate | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 7,413 | 10,838 | 18,192
Corporate | Intersegment |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (1,509) | (1,325) | (1,145)
Americas Recycling | Intersegment |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 26
Unaffiliated Customers | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 5,476,486 | 5,829,002 | 4,643,723
Unaffiliated Customers | North America | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 4,769,933 | 5,001,116 | 3,738,467
Unaffiliated Customers | Europe | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 697,631 | 815,723 | 885,919
Unaffiliated Customers | Corporate | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 8,922 | 12,163 | 19,337
Raw material products | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 728,205 | 966,217 | 1,181,211
Raw material products | North America | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 718,513 | 953,858 | 1,165,998
Raw material products | Europe | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 9,692 | 12,359 | 15,213
Raw material products | Corporate | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Steel products | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,285,603 | 2,409,991 | 1,809,943
Steel products | North America | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,738,556 | 1,763,017 | 1,099,286
Steel products | Europe | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 547,047 | 646,974 | 710,657
Steel products | Corporate | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Downstream products | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 2,062,358 | 2,070,817 | 1,303,118
Downstream products | North America | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,943,126 | 1,936,994 | 1,160,373
Downstream products | Europe | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 119,232 | 133,823 | 142,745
Downstream products | Corporate | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 400,320 | 381,977 | 349,451
Other | North America | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 369,738 | 347,247 | 312,810
Other | Europe | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 21,660 | 22,567 | 17,304
Other | Corporate | Segments |  |  |  |  |  |  |  |  |  |  |
Entity-Wide Information, Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 8,922 | $ 12,163 | $ 19,337
[1] | Excludes discontinued operations. (2) Fourth quarter results include a $32.1 million charge for a working capital adjustment related to the Acquisition, which was recorded subsequent to the end of the allowable one-year measurement period.

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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=srt_EuropeMember
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: |

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

X
- Details
Name: | srt_MajorCustomersAxis=cmc_UnaffiliatedCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cmc_RawMaterialProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cmc_SteelProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cmc_DownstreamProductsMember
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: |