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Stock Compensation Plans (Narrative) (Details) (USD $)
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6 Months Ended | 8 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2009
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Dec. 31, 2011
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2011
Portion Of Salary Payable In Stock Units [Member]
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Dec. 31, 2011
Ice Plan2007 [Member]
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Mar. 08, 2010
Ice Plan2007 [Member]
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Dec. 31, 2011
Ice Plan2007 [Member]
Long Term Performance Plan20112013 [Member]
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Dec. 17, 2009
Ice Plan2007 [Member]
Long Term Performance Plan20112013 [Member]
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Dec. 31, 2011
Directors Plan [Member]
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Dec. 31, 2011
Upper Limit [Member]
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Dec. 31, 2010
Upper Limit [Member]
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Dec. 31, 2009
Upper Limit [Member]
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| Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Compensation cost that has been charged against income | Ìý | Ìý | $ 15,900,000 | $ 15,500,000 | $ 12,200,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Share-based compensation arrangements portion of income tax benefit | Ìý | Ìý | 5,600,000 | 5,400,000 | 4,300,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Excess tax benefits classified as cash from financing activities | Ìý | Ìý | 4,500,000 | 3,300,000 | 3,500,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Maximum number of shares to be authorized | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 11,000,000 | Ìý | Ìý | Ìý | 800,000 | Ìý | Ìý | Ìý |
| Market value of common shares to be owned by Director by the end of a four-year period | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 250,000 | Ìý | Ìý | Ìý |
| Percentage of the target award pool that is granted based on performance | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 200.00% | 150.00% | 150.00% |
| Number of shares granted under the Plan | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 307,940 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Share Based Compensation Arrangement Share Based Payment Award Additional Shares Authorized | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 18,720 | Ìý | 67,009 | Ìý | Ìý | Ìý | Ìý |
| Committees targeted payout | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 12,480 | Ìý | 44,673 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Nonemployee Directors annual retainer | Ìý | 60,000 | Ìý | Ìý | Ìý | 24,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Nonemployee Directors annual equity award | Ìý | 80,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Directors' annual retainer fee reduction | 10.00% | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Total compensation cost related to outstanding awards not yet recognized | Ìý | Ìý | $ 26,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Weighted average remaining period for the awards outstanding (in years) | Ìý | 2.0 | 2.0 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Increase Decrease | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 500,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
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- Definition
Reduction in Compensation, Percentage No definition available.
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- Definition
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Increase Decrease No definition available.
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- Definition
Share Based Compensation Arrangement by Share Based Payment Award, Target Award No definition available.
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| X | ||||||||||
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- Definition
Share Based Compensation, Arrangement Share Based Payment Award, Additional Shares Authorized No definition available.
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| X | ||||||||||
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- Definition
Share Based Compensation Arrangement Share Based Payment Award Additional Shares Target Payout No definition available.
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| X | ||||||||||
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- Definition
Share Based Compensation Awards Outstanding Weighted Average Remaining Contractual Term. No definition available.
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- Definition
Value of reissuance of treasury stock for Director stock awards. No definition available.
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| X | ||||||||||
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The compensation expense recognized during the period pertaining to the deferred compensation arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total fair value of shares issued during the period under a deferred compensation arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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