BANK BORROWINGS AND LONG-TERM DEBT (Details) (USD $)	9 Months Ended
	Dec. 31, 2012	Mar. 31, 2012
Bank borrowings and long-term debt
Carrying Amount	$ 2,079,833,000	$ 2,188,673,000
Current portion	(230,495,000)	(39,340,000)
Non-current portion	1,849,338,000	2,149,333,000
Amount available under revolving line of credit facility	1,500,000,000
Term Loan, including current portion, due in installments through October 2014
Bank borrowings and long-term debt
Carrying Amount	1,170,340,000	1,179,595,000
New Term Loan, including current portion, due in installments through October 2016
Bank borrowings and long-term debt
Carrying Amount	517,500,000	487,500,000
Increase limit	50,000,000
Principal amount repaid	20,000,000
Asia Term Loans
Bank borrowings and long-term debt
Carrying Amount	375,500,000	377,000,000
Current portion	(175,500,000)
Outstanding under revolving line of credit
Bank borrowings and long-term debt
Carrying Amount		140,000,000
Other
Bank borrowings and long-term debt
Carrying Amount	$ 16,493,000	$ 4,578,000