Condensed Consolidated Statements of Income (Unaudited) (Percentage Change)	3 Months Ended	9 Months Ended
	Apr. 30, 2011	Apr. 30, 2011
Net sales (%)	4.90%	6.40%
Cost of products sold (%)	5.30%	7.10%
Gross margin (%)	4.60%	5.70%
Operating expenses:
Research and development (%)	(1.50%)	4.10%
Selling, general and administrative (%)	3.40%	1.10%
Restructuring charge - (See Note J)	(48.40%)	(27.20%)
Total operating expenses (%)	2.00%	0.70%
Operating income (%)	13.80%	25.40%
Other income (expense):
Investment and other income - net (%)	1080.20%	127.20%
Interest expense (%)	(0.90%)	7.50%
Income before income taxes (%)	20.40%	30.30%
Income taxes (%)	19.70%	28.50%
Net income (%)	20.70%	31.00%
Class A Nonvoting Common Stock
Per Class Common Share:
Basic net income (%)	20.00%	30.40%
Diluted net income (%)	20.00%	30.70%
Dividends (%)	2.90%	2.90%
Class B voting common stock
Per Class Common Share:
Basic net income (%)	20.00%	31.00%
Diluted net income (%)	20.00%	31.30%
Dividends (%)	2.90%	3.00%