Document And Entity Information	6 Months Ended
	Nov. 30, 2011	Jan. 03, 2012
Document And Entity Information [Abstract]
Trading Symbol	txi
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Nov. 30, 2011
Entity Central Index Key	0000097472
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Entity Registration Name	TEXAS INDUSTRIES INC
Current Fiscal Year End Date	--05-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		27,906,265