EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Basic earnings per share:
Net income	$ 152,899	$ 145,157	$ 465,689	$ 322,619
Shares used in computation:
Weighted-average ordinary shares outstanding	577,157	606,724	583,383	614,539
Basic (in dollars per share)	$ 0.26	$ 0.24	$ 0.80	$ 0.52
Diluted earnings per share:
Net income	$ 152,899	$ 145,157	$ 465,689	$ 322,619
Shares used in computation:
Weighted-average ordinary shares outstanding	577,157	606,724	583,383	614,539
Weighted-average ordinary share equivalents from stock options and awards (1) (2)	10,044	11,953	11,408	12,860
Weighted-average ordinary shares and ordinary share equivalents outstanding	587,201	618,677	594,791	627,399
Diluted (in dollars per share)	$ 0.26	$ 0.23	$ 0.78	$ 0.51