CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 26, 2012	Oct. 28, 2011	Oct. 26, 2012	Oct. 28, 2011
Net income	$ 109.6	$ 165.6	$ 173.4	$ 305.1
Other comprehensive income:
Foreign currency translation adjustments	3.6	(2.1)	(1.6)	(3.1)
Defined benefit obligation adjustments	0.1	0	0.2	0
Unrealized holding gains (losses) arising during the period	2.5	(7.8)	6.6	(6.8)
Income tax effect on unrealized holding gains (losses)	0.2	1.6	(0.3)	1.9
Reclassification adjustments for gains included in net income	(0.5)	0	(0.6)	(0.5)
Unrealized holding gains (losses) arising during the period	(5.5)	5.9	0.9	10.3
Reclassification adjustments for (gains) losses included in net income	2.6	(5.8)	(1.9)	(7.6)
Other comprehensive income (loss)	3.0	(8.2)	3.3	(5.8)
Comprehensive income	$ 112.6	$ 157.4	$ 176.7	$ 299.3