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STOCK-BASED COMPENSATION, Additional Disclosures (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 11 Months Ended | 1 Months Ended | 11 Months Ended | 12 Months Ended | 1 Months Ended | 11 Months Ended | 1 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2011
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Dec. 31, 2011
Y
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Dec. 31, 2010
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Dec. 31, 2010
Selling, general, and administrative expenses [Member]
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Dec. 31, 2010
Corporate expenses [Member]
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Dec. 31, 2010
Employee Severance [Member]
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Jan. 25, 2010
Ticketmaster [Member]
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Dec. 31, 2010
Ticketmaster [Member]
Employee Severance [Member]
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Dec. 31, 2010
Ticketmaster [Member]
Employees with change in control provisions in employment contracts [Member]
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Dec. 31, 2010
Front Line [Member]
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Jan. 31, 2010
Stock Incentive Plan [Member]
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Jan. 25, 2010
Stock Incentive Plan [Member]
Ticketmaster [Member]
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Jan. 31, 2010
Stock Bonus Plan [Member]
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Dec. 31, 2010
Azoff Trust Note [Member]
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Dec. 31, 2011
Azoff Trust Note [Member]
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Dec. 31, 2010
Azoff Trust Note [Member]
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Jan. 31, 2010
Stock Options [Member]
Ticketmaster [Member]
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Jan. 31, 2010
Stock Options [Member]
IAC and the Spincos [Member]
|
Dec. 31, 2010
Restricted Stock [Member]
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Jan. 25, 2010
Restricted Stock [Member]
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Jan. 31, 2010
Restricted Stock [Member]
Ticketmaster [Member]
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Jan. 31, 2010
RSUs [Member]
Ticketmaster [Member]
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Jan. 31, 2010
RSUs [Member]
IAC and the Spincos [Member]
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| Stock-based compensation, aggregate disclosures [Abstract] | |||||||||||||||||||||||
| Additional shares registered (in shares) | 10,000,000 | 4,900,000 | 16,700,000 | 1,500,000 | |||||||||||||||||||
| Final exchange ratio as part of Merger Agreement | 1.4743728 | 1.4743728 | |||||||||||||||||||||
| Shares issued as part of Merger Agreement (in shares) | 13,000,000 | 2,500,000 | 1,500,000 | 900,000 | 200,000 | ||||||||||||||||||
| Shares held by the Azoff Trust with guaranteed minimum value (in shares) | 1,500,000 | ||||||||||||||||||||||
| Guaranteed minimum value of shares held in Azoff Trust | $ 15.0 | ||||||||||||||||||||||
| Stock-based compensation expense of shares held by the Azoff Trust | 3.4 | 3.2 | |||||||||||||||||||||
| Stock-based awards not exchanged or modified as a result of the Merger (in shares) | 23,825 | ||||||||||||||||||||||
| Stock-based compensation expense of awards not exchanged or modified as a result of the Merger | 6.9 | ||||||||||||||||||||||
| Shares accelerated and modified vesting (in shares) | 3,400,000 | 1,400,000 | 1,100,000 | ||||||||||||||||||||
| Azoff Trust Note [Abstract] | |||||||||||||||||||||||
| Interest rate on note issued (in hundredths) | 3.00% | 3.00% | |||||||||||||||||||||
| Payable in monthly installments | 0.8 | ||||||||||||||||||||||
| Consideration transferred | 14.4 | 14.4 | |||||||||||||||||||||
| Total stock-based compensation expense to be recognized | 24.0 | 24.0 | |||||||||||||||||||||
| Face value of note issued | 38.4 | 38.4 | |||||||||||||||||||||
| Initial carrying value of the Azoff Trust note payable | 14.4 | 14.4 | |||||||||||||||||||||
| Corporate expenses recognized | 5.9 | 6.4 | |||||||||||||||||||||
| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | |||||||||||||||||||||||
| Stock-based compensation expense resulting from accelerated and modified vesting | 18.1 | 10.1 | 8.0 | ||||||||||||||||||||
| Total unrecognized compensation cost | $ 64.10 | ||||||||||||||||||||||
| Amortization period of unrecognized compensation cost (in years) | 2.4 | ||||||||||||||||||||||