SUMMARY OF ACCOUNTING POLICIES (Details ) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
SUMMARY OF ACCOUNTING POLICIES
Proceeds and repayment of bank borrowings				$ 975,700,000
Cash and Cash Equivalents
Cash and bank balances	1,210,284,000		1,210,284,000		1,174,423,000
Money market funds and time deposits	495,829,000		495,829,000		343,906,000
Cash and cash equivalents	1,706,113,000	1,545,765,000	1,706,113,000	1,545,765,000	1,518,329,000	1,748,471,000
Inventories
Raw materials	1,837,670,000		1,837,670,000		1,952,358,000
Work-in-progress	433,561,000		433,561,000		537,753,000
Finished goods	639,350,000		639,350,000		810,680,000
Inventories, total	2,910,581,000		2,910,581,000		3,300,791,000
Property and Equipment
Depreciation expense	103,300,000	103,100,000	301,500,000	304,200,000
Activity in goodwill account
Balance, beginning of the year			101,670,000
Acquisitions			172,417,000
Foreign currency translation adjustments			(267,000)
Balance, end of the quarter	273,820,000		273,820,000
Components of acquired intangible assets
Gross Carrying Amount	379,050,000		379,050,000		266,421,000
Accumulated Amortization	(237,054,000)		(237,054,000)		(208,167,000)
Total amortization expense	141,996,000		141,996,000		58,254,000
Total intangible amortization expense	13,000,000	12,900,000	28,900,000	36,500,000
Amortization expense recorded in cost of sales	6,900,000		7,700,000
Estimated future annual amortization expense for acquired intangible assets
2013	13,998,000		13,998,000
2014	49,970,000		49,970,000
2015	53,334,000		53,334,000
2016	12,749,000		12,749,000
2017	6,901,000		6,901,000
Thereafter	5,044,000		5,044,000
Other Current Liabilities
Customer working capital advances included in other current liabilities	194,300,000		194,300,000		326,600,000
Deferred revenue	277,000,000		277,000,000		329,600,000
Customer-related intangibles
Components of acquired intangible assets
Gross Carrying Amount	268,310,000		268,310,000		243,681,000
Accumulated Amortization	(217,490,000)		(217,490,000)		(199,238,000)
Total amortization expense	50,820,000		50,820,000		44,443,000
Intangible asset impairment			10,000,000
Other intangible assets related to Saturn acquisition	24,700,000		24,700,000
Licenses and other intangibles
Components of acquired intangible assets
Gross Carrying Amount	110,740,000		110,740,000		22,740,000
Accumulated Amortization	(19,564,000)		(19,564,000)		(8,929,000)
Total amortization expense	91,176,000		91,176,000		13,811,000
Increase in intangible assets relating to exclusive manufacturing rights and certain manufacturing technologies and processes, in connection with an acquisition			$ 88,000,000