XML 67 R63.htm IDEA: XBRL DOCUMENT v2.4.0.6

Business Segments (Details Textual)	Nov. 30, 2011 Segment
Business Segments [Abstract]
Segments	5

X

- Definition

Business segment number.

+ References

No definition available.

+ Details

Name:	cmc_BusinessSegmentNumber
Namespace Prefix:	cmc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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