SUPPLEMENTAL GUARANTOR AND NON-GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Condensed consolidating statements of cash flows
Net cash provided by (used in) operating activities		$ 669,424	$ 1,118,307
Cash flows from investing activities:
Purchases of property and equipment, net of proceeds from disposal		(164,394)	(461,153)
Acquisition of businesses, net of cash acquired		(52,639)	(238,031)
Proceeds from divestitures of business, net of cash held in divested business		(5,493)	4,599
Other investing activities, net		(11,517)	(12,067)
Net cash provided by (used in) investing activities		(234,043)	(706,652)
Cash flows from financing activities:
Proceeds from bank borrowings and long-term debt		234,523	1,003,294
Repayments of bank borrowings, long-term debt and capital lease obligations		(251,337)	(518,549)
Payments for early retirement of long-term debt			(544,840)
Payments for repurchases of ordinary shares		(290,752)	(362,693)
Net proceeds from issuance of ordinary shares		12,341	21,106
Other financing activities, net	7,400	(29,135)	46,298
Net cash provided by (used in) financing activities		(324,360)	(355,384)
Effect of exchange rates on cash and cash equivalents		2,472	(26,113)
Net increase (decrease) in cash and cash equivalents		113,493	30,158
Cash and cash equivalents, beginning of period		1,593,728	1,587,087
Cash and cash equivalents, end of period	1,707,221	1,707,221	1,617,245
Parent | Reportable legal entities
Condensed consolidating statements of cash flows
Net cash provided by (used in) operating activities		(4,319)	477,036
Cash flows from investing activities:
Investing cash flows from (to) affiliates		(1,163,617)	(306,254)
Other investing activities, net		(1,500)
Net cash provided by (used in) investing activities		(1,165,117)	(306,254)
Cash flows from financing activities:
Proceeds from bank borrowings and long-term debt		223,000	1,003,000
Repayments of bank borrowings, long-term debt and capital lease obligations		(245,500)	(489,365)
Payments for early retirement of long-term debt			(503,423)
Payments for repurchases of ordinary shares		(290,752)	(362,693)
Net proceeds from issuance of ordinary shares		12,341	21,106
Financing cash flows from (to) affiliates		1,575,271	(29,135)
Net cash provided by (used in) financing activities		1,274,360	(360,510)
Effect of exchange rates on cash and cash equivalents		(137,117)	53,341
Net increase (decrease) in cash and cash equivalents		(32,193)	(136,387)
Cash and cash equivalents, beginning of period		638,714	740,515
Cash and cash equivalents, end of period	606,521	606,521	604,128
Guarantor Subsidiaries | Reportable legal entities
Condensed consolidating statements of cash flows
Net cash provided by (used in) operating activities		369,594	(1,062,723)
Cash flows from investing activities:
Purchases of property and equipment, net of proceeds from disposal		(76,042)	(184,907)
Acquisition of businesses, net of cash acquired		(20,092)	(61,587)
Investing cash flows from (to) affiliates		(2,455,910)	(307,423)
Other investing activities, net		(10,597)	(832)
Net cash provided by (used in) investing activities		(2,562,641)	(554,749)
Cash flows from financing activities:
Proceeds from bank borrowings and long-term debt			277
Repayments of bank borrowings, long-term debt and capital lease obligations		(1,686)	(1,068)
Payments for early retirement of long-term debt			(41,417)
Financing cash flows from (to) affiliates		2,180,326	1,537,804
Net cash provided by (used in) financing activities		2,178,640	1,495,596
Effect of exchange rates on cash and cash equivalents		(5,893)	546
Net increase (decrease) in cash and cash equivalents		(20,300)	(121,330)
Cash and cash equivalents, beginning of period		210,462	226,372
Cash and cash equivalents, end of period	190,162	190,162	105,042
Non-Guarantor Subsidiaries | Reportable legal entities
Condensed consolidating statements of cash flows
Net cash provided by (used in) operating activities		304,149	1,704,001
Cash flows from investing activities:
Purchases of property and equipment, net of proceeds from disposal		(88,340)	(276,246)
Acquisition of businesses, net of cash acquired		(32,547)	(176,444)
Proceeds from divestitures of business, net of cash held in divested business		(5,493)	4,599
Investing cash flows from (to) affiliates		805,143	(3,512,640)
Other investing activities, net		580	(11,235)
Net cash provided by (used in) investing activities		679,343	(3,971,966)
Cash flows from financing activities:
Proceeds from bank borrowings and long-term debt		11,523	17
Repayments of bank borrowings, long-term debt and capital lease obligations		(4,151)	(28,116)
Financing cash flows from (to) affiliates		(941,225)	2,617,641
Other financing activities, net		(29,135)	46,298
Net cash provided by (used in) financing activities		(962,988)	2,635,840
Effect of exchange rates on cash and cash equivalents		145,482	(80,000)
Net increase (decrease) in cash and cash equivalents		165,986	287,875
Cash and cash equivalents, beginning of period		744,552	620,200
Cash and cash equivalents, end of period	910,538	910,538	908,075
Eliminations
Condensed consolidating statements of cash flows
Net cash provided by (used in) operating activities			(7)
Cash flows from investing activities:
Purchases of property and equipment, net of proceeds from disposal		(12)
Investing cash flows from (to) affiliates		2,814,384	4,126,317
Net cash provided by (used in) investing activities		2,814,372	4,126,317
Cash flows from financing activities:
Financing cash flows from (to) affiliates		(2,814,372)	(4,126,310)
Net cash provided by (used in) financing activities		$ (2,814,372)	$ (4,126,310)