OTHER ASSETS (Details Narrative) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012 1.00% Convertible Senior Notes Due March 2018 [Member]	Mar. 31, 2012 1.00% Convertible Senior Notes Due March 2018 [Member]	Oct. 31, 2011 Revolving credit facility [Member]	Mar. 31, 2010 1.25% Convertible Senior Notes due March 2015 [Member]	Sep. 30, 2013 0.35 % Senior Convertible Notes Due June 2020 [Member]	May 31, 2013 0.35 % Senior Convertible Notes Due June 2020 [Member]
Debt Instrument
Aggregate principal amount	$ 1,000.0	$ 1,000.0	$ 1,000.0	$ 575.0	$ 1,000.0	$ 1,000.0
Interest rate on Convertible Senior Notes	1.00%	1.00%		1.25%	0.35%	0.35%

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant