CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 25, 2013	Jan. 27, 2012	Jan. 25, 2013	Jan. 27, 2012
Net income	$ 158.1	$ 119.6	$ 331.5	$ 424.7
Other comprehensive income (loss):
Foreign currency translation adjustments	1.5	(4.3)	(0.1)	(7.4)
Defined benefit obligation adjustments	0	(3.0)	0.2	(3.0)
Unrealized holding gains (losses) arising during the period	(1.9)	4.3	4.7	(2.5)
Income tax effect on unrealized holding gains (losses)	0.3	(0.8)	0	1.1
Reclassification adjustments for gains (losses) included in net income	0.1	0	(0.5)	(0.5)
Unrealized holding gains (losses) arising during the period	(2.7)	11.9	(1.8)	22.2
Reclassification adjustments for losses (gains) included in net income	3.1	(10.5)	1.2	(18.1)
Other comprehensive income (loss)	0.4	(2.4)	3.7	(8.2)
Comprehensive income	$ 158.5	$ 117.2	$ 335.2	$ 416.5