EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Basic earnings per share:
Net income	$ 148,910	$ 152,899	$ 382,737	$ 465,689
Shares used in computation:
Weighted-average ordinary shares outstanding (in shares)	554,919	577,157	561,070	583,383
Basic earnings per share (in dollars per share)	$ 0.27	$ 0.26	$ 0.68	$ 0.80
Diluted earnings per share:
Net income	$ 148,910	$ 152,899	$ 382,737	$ 465,689
Shares used in computation:
Weighted-average ordinary shares outstanding (in shares)	554,919	577,157	561,070	583,383
Weighted-average ordinary share equivalents from stock options and awards (in shares)	6,077	10,044	7,856	11,408
Weighted-average ordinary shares and ordinary share equivalents outstanding (in shares)	560,996	587,201	568,926	594,791
Diluted earnings per share (in dollars per share)	$ 0.27	$ 0.26	$ 0.67	$ 0.78