EQUITY AND STOCK-BASED COMPENSATION (Details 2)	1 Months Ended	6 Months Ended
Jan. 31, 2012	Mar. 31, 2011	Jun. 30, 2012 Y
Assumptions in determining the fair value of awards granted
Annual expected stock price volatility (as a percent)	44.30%	61.00%
Annual expected dividend yield (as a percent)	1.60%	1.27%
Risk free interest rate (as a percent)	0.44%	1.03%
Correlation between total shareholder return for SPX and S&P 500 Composite Index	0.7365	0.7559
Historical period upon which annual expected stock price volatility is based (in years)			3
Minimum
Assumptions in determining the fair value of awards granted
Daily treasury yield curve period upon which average risk-free interest rate is based (in years)			1
Maximum
Assumptions in determining the fair value of awards granted
Daily treasury yield curve period upon which average risk-free interest rate is based (in years)			3
S&P 500 Composite Index
Assumptions in determining the fair value of awards granted
Annual expected stock price volatility (as a percent)	23.10%	30.30%
Risk free interest rate (as a percent)	0.44%	1.03%

Represents the historical period upon which annual expected stock price volatility is based.

No definition available.

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- Definition

Represents the daily treasury yield curve period, in years, upon which average risk-free interest rate is based.

+ References

No definition available.

+ Details

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- Definition

Represents the assumed correlation between the total shareholder return for the entities stock and the S&P 500 Composite Index.

+ References

No definition available.

+ Details

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iii)

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

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(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

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(ii)

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

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(d)

-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

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iv)

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

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