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Nature Of Operations	12 Months Ended
Nature Of Operations	May 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature Of Operations	Texas Industries, Inc. and subsidiaries is a leading supplier of heavy construction materials in the southwestern United States through our three business segments: cement, aggregates and consumer products. Our principal products are gray portland cement, produced and sold through our cement segment; stone, sand and gravel, produced and sold through our aggregates segment; and ready-mix concrete, produced and sold through our consumer products segment. Our facilities are concentrated primarily in Texas, Louisiana and California. When used in these notes the terms “Company,” “we,” “us” or “our” mean Texas Industries, Inc. and subsidiaries unless the context indicates otherwise.