| Transactions with Officers and Directors (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended | 60 Months Ended | 3 Months Ended | ||||
|---|---|---|---|---|---|---|---|
| Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2014 | Dec. 31, 2012
 Chief Executive Officer [Member] | Dec. 31, 2009
 Segment, Liberty Interactive [Member]
 Chief Executive Officer [Member] | Dec. 31, 2009
 Segment, Liberty Starz [Member]
 Chief Executive Officer [Member] | Dec. 31, 2009
 Segment, Liberty Capital [Member]
 Chief Executive Officer [Member] | |
| Officers' Compensation | $ 1.5 | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | 6,200,000 | 10,600,000 | 8,743,000 | 760,000 | 1,353,000 | ||
| Annual base salary increase | 5.00% | ||||||
| Annual target cash bonus | 200.00% | ||||||
| Officer compensation upon death or termination without cause | $ 7.8 | ||||||
| Termination Benefit Period (months) | 18 | ||||||
| Equity Method Investment, Ownership Percentage | 1.00% | ||||||
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- Definition Annual base salary increase No definition available. 
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- Definition Annual target cash bonus No definition available. 
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- Definition Officer compensation upon death or termination without cause No definition available. 
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- Definition Termination Benefit Period No definition available. 
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Expenditures for salaries of officers. Does not include allocated share-based compensation, pension and post-retirement benefit expense or other labor-related non-salary expense. For commercial and industrial companies, excludes any direct and overhead labor that is included in cost of goods sold. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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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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