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STOCK COMPENSATION PLANS (Narrative) (Details) (USD $)
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12 Months Ended | 12 Months Ended | 8 Months Ended | 12 Months Ended | 15 Months Ended | 21 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||
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Dec. 31, 2012
Agreement
Plan
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Minimum [Member]
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Dec. 31, 2012
ICE Plan and 2012 Equity Plan [Member]
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Dec. 31, 2012
ICE Plan [Member]
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Mar. 08, 2010
ICE Plan [Member]
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Dec. 17, 2009
ICE Plan [Member]
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Dec. 31, 2011
ICE Plan [Member]
Maximum [Member]
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May 11, 2010
ICE Plan [Member]
Maximum [Member]
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Dec. 31, 2012
2012 Equity Plan [Member]
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Dec. 31, 2012
2012 Equity Plan [Member]
Maximum [Member]
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Dec. 31, 2012
Directors' Plan [Member]
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Dec. 31, 2012
Directors' Plan [Member]
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May 07, 2012
Directors' Plan [Member]
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Dec. 31, 2010
Directors' Plan [Member]
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Mar. 31, 2011
Directors' Plan [Member]
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Dec. 31, 2012
Directors' Plan [Member]
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Dec. 31, 2012
Directors' Plan [Member]
Minimum [Member]
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Dec. 31, 2012
Directors' Plan [Member]
Maximum [Member]
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Dec. 31, 2012
2011 – 2013 and 2012 – 2014 Performance Periods [Member]
ICE Plan [Member]
Minimum [Member]
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Dec. 31, 2012
2011 – 2013 and 2012 – 2014 Performance Periods [Member]
ICE Plan [Member]
Maximum [Member]
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Dec. 31, 2012
2010 – 2012 Performance Period [Member]
ICE Plan [Member]
Minimum [Member]
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Dec. 31, 2012
2010 – 2012 Performance Period [Member]
ICE Plan [Member]
Maximum [Member]
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Dec. 31, 2012
Portion of Salary Payable in Stock Units [Member]
Directors' Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Plan Year Agreements | 3 | ||||||||||||||||||||||||
| Number of share-based compensation plans | 2 | ||||||||||||||||||||||||
| Compensation cost that has been charged against income | $ 20,600,000 | $ 15,900,000 | $ 15,500,000 | ||||||||||||||||||||||
| Share-based compensation arrangements, total income tax benefit recognized | 7,200,000 | 5,600,000 | 5,400,000 | ||||||||||||||||||||||
| Excess tax benefits classified as cash from financing activities | 12,700,000 | 4,500,000 | 3,300,000 | ||||||||||||||||||||||
| Increase in authorized number of shares available for issuance, and annual limitation on number of shares available to grant to any one participant in any fiscal year | 500,000 | ||||||||||||||||||||||||
| Maximum number of shares authorized | 11,000,000 | 800,000 | |||||||||||||||||||||||
| Performance/vesting period | 1 year | 3 years | |||||||||||||||||||||||
| Number of shares each stock option and SAR will reduce common shares available for grant | 1 | ||||||||||||||||||||||||
| Number of shares each other award will reduce common shares available for grant | 2 | ||||||||||||||||||||||||
| Payout rate, as a percentage of the original grant | 50.00% | 0.00% | 200.00% | 0.00% | 150.00% | ||||||||||||||||||||
| Number of shares granted under the award | 426,610 | ||||||||||||||||||||||||
| Number of performance shares granted | 312,540 | ||||||||||||||||||||||||
| Number of restricted shares granted | 114,070 | ||||||||||||||||||||||||
| Additional number of shares awarded based on additional performance criteria, actual | 18,720 | 67,009 | |||||||||||||||||||||||
| Additional number of shares awarded based on additional performance criteria, target | 12,480 | 44,673 | |||||||||||||||||||||||
| Maximum number of shares that may be issued (in shares) | 6,000,000 | ||||||||||||||||||||||||
| Number of shares granted | 23,575 | ||||||||||||||||||||||||
| Period from date of election, at end of which Director is required to hold specified number of shares | 5 years | ||||||||||||||||||||||||
| Market value of common shares to be owned by Director at end of specified period | 250,000 | ||||||||||||||||||||||||
| Nonemployee Directors, annual retainer | 50,000 | 60,000 | 24,000 | ||||||||||||||||||||||
| Nonemployee Directors, annual equity award | 85,000 | 80,000 | 75,000 | ||||||||||||||||||||||
| Age of Director on Equity Grant date, at which Director will receive common shares with no restrictions (in years) | 69 years | ||||||||||||||||||||||||
| Total compensation cost related to outstanding awards not yet recognized | $ 28,000,000 | ||||||||||||||||||||||||
| Weighted average remaining period for recognition of compensation costs on awards outstanding (in years) | 1 year 11 months | ||||||||||||||||||||||||