Earnings Per Share (Schedule Of Basic Weighted-Average Ordinary Shares Outstanding And Diluted Weighted-Average Ordinary Share Equivalents Used To Calculate Basic And Diluted Income From Continuing Operations Per Share) (Details) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
	Aug. 02, 2010	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jul. 01, 2011	Mar. 31, 2011	Dec. 31, 2010	Oct. 01, 2010	Jul. 02, 2010	Mar. 31, 2012		Mar. 31, 2011		Mar. 31, 2010
Earnings Per Share [Abstract]
Income from continuing operations		$ 141,422,000	$ 103,747,000	$ 130,069,000	$ 135,407,000	$ 134,687,000	$ 201,994,000	$ 149,598,000	$ 120,066,000	$ 510,645,000		$ 606,345,000		$ 25,002,000
Loss from discontinued operations		(16,689,000)	(1,570,000)	(189,000)	(3,432,000)	648,000	(3,704,000)	(5,182,000)	(1,888,000)	(21,880,000)		(10,126,000)		(6,408,000)
Weighted-average ordinary shares outstanding										716,247,000		777,315,000		811,677,000
Basic earnings from continuing operations per share		$ 0.21	$ 0.15	$ 0.18	$ 0.18	$ 0.18	$ 0.26	$ 0.19	$ 0.15	$ 0.71		$ 0.78		$ 0.03
Basic loss from discontinued operations per share		$ (0.02)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ (0.03)		$ (0.01)		$ (0.01)
Weighted-average ordinary share equivalents from stock options and awards										11,560,000	[1]	12,877,000	[1]	9,435,000	[1]
Weighted-average ordinary shares and ordinary share equivalents outstanding										727,807,000	[2]	790,192,000	[2]	821,112,000	[2]
Diluted earnings from continuing operations per share		$ 0.20	$ 0.14	$ 0.18	$ 0.18	$ 0.17	$ 0.26	$ 0.19	$ 0.15	$ 0.70		$ 0.77		$ 0.03
Diluted loss from discontinued operations per share		$ (0.02)	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ (0.03)		$ (0.01)		$ (0.01)
Ordinary share equivalents from stock options excluded from the computation of diluted earnings per share										24,200,000		25,500,000		38,100,000
Amount paid for redemption of Convertible Subordinated Notes	$ 240,000,000
Subordinated Notes interest rate	1.00%
Conversion price of Convertible Subordinated Notes	$ 15.525

[1] Ordinary share equivalents of approximately 24.2 million, 25.5 million and 38.1 million shares to purchase stock options during fiscal years 2012, 2011 and 2010, respectively, were excluded from the computation of diluted earnings per share primarily because the exercise price of these options was greater than the average market price of the Company's ordinary shares during the respective periods.

[2] On August 2, 2010 the Company paid approximately $240.0 million to redeem its 1% Convertible Subordinated Notes upon maturity. The notes carried conversion provisions to issue shares to settle any conversion spread (excess of the conversion value over the conversion price) in stock. The conversion price was $15.525 per share (subject to certain adjustments). On the maturity date, the Company's stock price was less than the conversion spread, and therefore no shares were issued. For the year ended March 31, 2011, the conversion obligation was less than the principal portion of these notes and accordingly, no additional shares were included as ordinary share equivalents.