Restructuring (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 27, 2012	Apr. 29, 2011	Apr. 27, 2012	Apr. 29, 2011	Oct. 28, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,418	$ 1,462	$ 9,515	$ 2,858
Restructuring charges per share after tax	$ 0.04	$ 0.01	$ 0.07	$ 0.02
2008 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		98		1,494
2011 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4,418	1,364	9,515	1,364
Restructuring charges per share after tax	$ 0.04	$ 0.01	$ 0.07	$ 0.01	$ 0.24
2011 Restructuring Initiatives [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges per share after tax			$ 0.35
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,706	529	4,660	1,925
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,712	$ 933	$ 4,855	$ 933