SUMMARY OF ACCOUNTING POLICIES - Tangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Cash and Cash Equivalents
Cash and bank balances	$ 763,834	$ 533,438
Money market funds and time deposits	1,066,841	1,074,132
Cash and cash equivalents	1,830,675	1,607,570	$ 1,628,408	$ 1,593,728
Inventories
Raw materials	2,537,623	2,234,512
Work-in-progress	279,493	561,282
Finished goods	579,346	695,862
Inventories, total	3,396,462	3,491,656
Property, Plant and Equipment
Property and equipment, gross	5,727,006	5,513,709
Accumulated depreciation and amortization	(3,409,980)	(3,256,076)
Property and equipment, net	2,317,026	2,257,633
Depreciation expense associated with property and equipment	432,238	425,729	$ 496,825
Machinery and equipment
Property, Plant and Equipment
Property and equipment, gross	$ 3,233,392	3,187,590
Machinery and equipment | Minimum
Property, Plant and Equipment
Depreciable Life	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Depreciable Life	10 years
Buildings
Property, Plant and Equipment
Depreciable Life	30 years
Property and equipment, gross	$ 1,237,739	1,144,798
Leasehold improvements
Property, Plant and Equipment
Property and equipment, gross	$ 395,663	397,340
Leasehold improvements | Maximum
Property, Plant and Equipment
Depreciable Life	30 years
Furniture, fixtures, computer equipment and software
Property, Plant and Equipment
Property and equipment, gross	$ 502,223	477,203
Furniture, fixtures, computer equipment and software | Minimum
Property, Plant and Equipment
Depreciable Life	3 years
Furniture, fixtures, computer equipment and software | Maximum
Property, Plant and Equipment
Depreciable Life	7 years
Land
Property, Plant and Equipment
Property and equipment, gross	$ 145,663	127,927
Construction-in-progress
Property, Plant and Equipment
Property and equipment, gross	$ 212,326	$ 178,851