SHARE-BASED COMPENSATION (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2013
Share-based compensation
Shares available for grants	43.4
Share options
Share-based compensation
Expiration period of options issued	7 years
Vesting period	4 years
Share options \| Non-Employee Directors
Share-based compensation
Expiration period of options issued	5 years
Stock Options
Share-based compensation
Unrecognized compensation expense	1.9
Share weighted-average amortization period	1 year 10 months 24 days
Share Bonus Awards with Market Conditions
Share-based compensation
Unrecognized compensation expense	8.0
Vesting period	3 years
Share Bonus Awards with Market Conditions \| Minimum
Share-based compensation
Vesting period	3 years
Share Bonus Awards with Market Conditions \| Maximum
Share-based compensation
Vesting period	5 years
Share bonus awards
Share-based compensation
Unrecognized compensation expense	71.4
Share weighted-average amortization period	2 years 6 months

Expiration period of options granted to employees and non-employee Directors.

No definition available.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Period Type:	instant