SHARE-BASED COMPENSATION (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended
Dec. 31, 2012
Share options
Share-based compensation
Unrecognized compensation expense	$ 2.4
Share weighted-average amortization period	2 years
Share options outstanding (in shares)	36.5
Share options exercisable (in shares)	35.5
Options outstanding, weighted-average exercise price (in dollars per share)	$ 8.06
Options exercisable, weighted-average exercise price (in dollars per share)	$ 8.09
Unvested share bonus awards
Share-based compensation
Unrecognized compensation expense	82.7
Share weighted-average amortization period	2 years 8 months 12 days
Additional disclosure
Unvested share bonus awards	9.3
Average grant date price of unvested share bonus awards (in dollars per share)	$ 6.74
Number of shares outstanding	22.1
Unvested share bonus awards, market-based \| Minimum
Additional disclosure
Number of shares that can be issued	0
Unvested share bonus awards, market-based \| Maximum
Additional disclosure
Number of shares that can be issued	7.4
Unvested share bonus awards, market-based \| Key employees
Share-based compensation
Unrecognized compensation expense	$ 10.0
Additional disclosure
Unvested share bonus awards	2.2
Average grant date price of unvested share bonus awards (in dollars per share)	$ 7.64
Number of shares outstanding	4.2
Vesting period	3 years
Unvested share bonus awards, market-based \| Key employees \| Minimum
Additional disclosure
Number of shares that can be issued	0
Unvested share bonus awards, market-based \| Key employees \| Maximum
Additional disclosure
Number of shares that can be issued	4.4

The number of shares that can be issued, whereby vesting is contingent upon achievement of market conditions.

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.

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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.

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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.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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-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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(b)

-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.

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

-Publisher FASB

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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