Shareholders' Equity - Additional Information (Detail) (USD $)	12 Months Ended		1 Months Ended					12 Months Ended	0 Months Ended	1 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Feb. 28, 2013	Oct. 31, 2012	Sep. 30, 2012	Apr. 30, 2012	Mar. 31, 2012	Mar. 30, 2013	Nov. 14, 2014	Jan. 31, 2015	May 20, 2015
Equity [Line Items]
Ordinary shares repurchased, value	$ 495,277,000	$ 2,447,000
Secondary Offering
Equity [Line Items]
Issuance of new shares, shares			25,000,000	3,450,000	23,000,000	3,750,000	25,000,000
Issuance of new shares, price per share			$ 61.50	$ 53.00	$ 53.00	$ 47.00	$ 47.00
Fees related to secondary offering								1,700,000
Accelerated Share Repurchase Program
Equity [Line Items]
Ordinary shares repurchased, shares	4,718,335								4,437,516	280,819
Ordinary shares repurchased, value									355,000,000
Ordinary shares repurchased, cash paid									355,000,000
ASR program, percentage of shares expected to be repurchased									100.00%
Share repurchase agreement, completion date									Jan. 29, 2015
Share Repurchase Program
Equity [Line Items]
Ordinary shares repurchased, shares	2,040,979
Ordinary shares repurchased, value	136,900,000
Ordinary shares repurchased, remaining availability	508,100,000
Share Repurchase Program | Subsequent Event | Maximum
Equity [Line Items]
Ordinary shares repurchased, additional authorized amount											500,000,000
Withholding Taxes
Equity [Line Items]
Ordinary shares repurchased, shares	40,787
Ordinary shares repurchased, value	$ 3,300,000