Shareholders' Equity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 29, 2016 USD ($) $ / shares shares	Apr. 24, 2015 $ / shares shares	Apr. 29, 2016 € / shares shares	Jun. 30, 2015 shares
Class of Stock [Line Items]
Common stock, authorized (shares)	2,600,000,000	2,600,000,000	2,600,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001
Deferred stock, shares authorized	40,000		40,000
Deferred stock, par value (in euros per share) | € / shares			€ 1.00
Preferred stock, authorized (in shares)	128,000,000		128,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.20
Stock issued during period (in shares)	1,872
Stock issued to advisors (in shares)	624
Stock issued during period | $	$ 75
Shares repurchased (in shares)	38,000,000	30,000,000
Average repurchase price (in dollars per share) | $ / shares	$ 74.92	$ 64.53
Common stock authorized to be repurchased (in shares)	80,000,000		80,000,000	80,000,000
June 2013 Share Repurchase Program [Member]
Class of Stock [Line Items]
Shares repurchased (in shares)	8,000,000
Common stock available for future repurchases (in shares)	72,000,000		72,000,000
Series A Preferred Shares [Member]
Class of Stock [Line Items]
Preferred stock, authorized (in shares)	500,000		500,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 1.00
Euro Deferred Shares [Member]
Class of Stock [Line Items]
Stock issued during period (in shares)	40,000