DEBT - Convertible Bonds (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
Mar. 31, 2012	Dec. 31, 2012	Dec. 05, 2012
Debt:
Declared dividend per share (USD per share)			$ 1.60
Number of shares issuable if bonds are converted		4,780,901
Convertible debt \| Convertible bonds
Debt:
Proceeds from issuance of convertible bonds	$ 250.0
Convertible debt	221.9
Carrying amount of equity component	$ 25
Percentage of prinipal amount convertible	100.00%
Coupon rate	3.75%
Conversion price	$ 55	$ 52.29	$ 52.29

Debt Instrument, Convertible Debt, Amount of Principal Convertible

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- Definition

Debt Instrument, Convertible, Number of Shares Issued if Converted

+ References

No definition available.

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- Definition

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Publisher SEC

-Name Regulation S-X (SX)

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-Section 03

-Paragraph 16

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a)(2))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

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-Publisher FASB

-Name FASB Staff Position (FSP)

-Number APB14-1

-Paragraph 31

-Subparagraph a

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

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-Subparagraph (b)

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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-Paragraph 3

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 19

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-Name Accounting Standards Codification

-Glossary Financing Activities

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