Annual report pursuant to Section 13 and 15(d)

STOCK COMPENSATION PLANS (Stock Options, Restricted Stock, Deferred Stock Allocation And Performance Share Activity Under Incentive Equity Plans And Nonemployee Directors' Compensation Plans) (Details)

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STOCK COMPENSATION PLANS (Stock Options, Restricted Stock, Deferred Stock Allocation And Performance Share Activity Under Incentive Equity Plans And Nonemployee Directors' Compensation Plans) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Restricted Awards and Performance Shares [Roll Forward]      
Outstanding at beginning of year 1,305,212    
Granted during the year 655,038    
Vested (737,813)    
Forfeited/cancelled/expired (53,286)    
Outstanding at end of year 1,169,151    
Reserved for future grants or awards at end of year:      
Reserved for future grants or awards 11,663,567    
Restricted Awards and Performance Shares, Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding, beginning of year 43.19    
Granted 68.85    
Vested 11.70    
Forfeited/expired 76.44    
Outstanding, end of year 61.81    
Employee Plans [Member]
      
Reserved for future grants or awards at end of year:      
Reserved for future grants or awards 11,568,719    
ICE Plan and 2012 Equity Plan [Member]
      
Additional disclosures      
Payout rate, as a percentage of the original grant 50.00%    
Directors' Plan [Member]
      
Reserved for future grants or awards at end of year:      
Reserved for future grants or awards 94,848    
Grants Associated with a Prior Period Payout Exceeding Target [Member] | ICE Plan and 2012 Equity Plan [Member]
      
Restricted Awards and Performance Shares [Roll Forward]      
Granted during the year 191,506 71,956 114,371
Restricted Awards [Member]
      
Restricted Awards and Performance Shares [Roll Forward]      
Outstanding at beginning of year 425,166 371,712 290,702
Granted during the year 151,869 125,059 133,666
Vested (161,741) (61,330) (50,156)
Forfeited/cancelled/expired (21,507) (10,275) (2,500)
Outstanding at end of year 393,787 425,166 371,712
Performance Shares [Member]
      
Restricted Awards and Performance Shares [Roll Forward]      
Outstanding at beginning of year 877,435 843,238 823,393
Granted during the year 501,346 [1] 263,816 [1] 376,524 [1]
Vested (574,518) [2] (215,870) [2] (343,321) [2]
Forfeited/cancelled/expired (31,779) (13,749) (13,358)
Outstanding at end of year 772,484 877,435 843,238
Vested or expected to vest as of December 31, 2012 743,907    
Restricted Awards and Performance Shares, Weighted Average Grant Date Fair Value [Roll Forward]      
Granted 77.78    
Directors Retainer and Voluntary Shares [Member]
      
Restricted Awards and Performance Shares [Roll Forward]      
Outstanding at beginning of year 2,611 2,509 4,596
Granted during the year 1,823 1,815 2,075
Vested (1,554) (1,713) (4,162)
Outstanding at end of year 2,880 2,611 2,509
[1] The shares granted during the year include 191,506 shares, 71,956 shares and 114,371 shares for each year presented, respectively, related to the 50 percent payout associated with the prior-year pool as actual payout exceeded target.
[2] For each year presented, the shares vested on December 31, 2011, December 31, 2010 and December 31, 2009, respectively, and were valued on February 13, 2012, February 14, 2011 and February 19, 2010, respectively.