Business Description (Details)	0 Months Ended	1 Months Ended	12 Months Ended
	Jul. 12, 2013	Jul. 31, 2013 item	Jul. 31, 2013 item	Jul. 31, 2012 item	Jul. 31, 2011 item
Business Description
Number of principal operating companies		5	5	5	5
Business Description
Number of operating segments			5
Additional common stock issued as stock dividend (in shares)		15,044,000
Stock split ratio	1.5
Percentage of stock dividend paid	50.00%
Medivators
Business Description
Number of foreign subsidiaries		2	2