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Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
Interactive Group
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Sep. 30, 2013
Interactive Group
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Sep. 30, 2014
Ventures Group
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Sep. 30, 2013
Ventures Group
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Sep. 30, 2014
Common Class A
Interactive Group
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Dec. 31, 2013
Common Class A
Interactive Group
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Sep. 30, 2014
Common Class A
Ventures Group
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Dec. 31, 2013
Common Class A
Ventures Group
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Options granted | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 1,824 | Ìý | 1 | Ìý |
| WAEP of grants in the period | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 29.20 | Ìý | $ 73.05 | Ìý |
| Weighted average grant-date fair value of options | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 12.05 | Ìý | Ìý | Ìý |
| Award vesting period | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 4 years | Ìý | Ìý | Ìý |
| Issuance of common stock upon exercise of stock options | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 2,547 | Ìý | 115 | Ìý |
| WAEP exercised | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 14.60 | Ìý | $ 24.92 | Ìý |
| Outstanding options | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 28,884 | 30,607 | 1,845 | 1,932 |
| Exercisable options | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 16,340 | Ìý | 1,034 | Ìý |
| Outstanding WAEP | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 18.88 | $ 17.98 | $ 14.64 | $ 28.71 |
| Exercisable WAEP | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 17.61 | Ìý | $ 14.30 | Ìý |
| Aggregate intrinsic value of options outstanding | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 280 | Ìý | $ 43 | Ìý |
| Aggregate intrinsic value of options exercisable | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 179 | Ìý | 24 | Ìý |
| Stock-based compensation | 20 | 23 | 71 | 80 | 66 | 75 | 5 | 5 | Ìý | Ìý | Ìý | Ìý |
| Total unrecognized compensation cost related to unvested Liberty equity awards | $ 89 | Ìý | $ 89 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Weighted average period of recognition related to unvested equity awards (in years) | Ìý | Ìý | 2 years 3 months 18 days | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | Ìý | Ìý | 0.00% | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| X | ||||||||||
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- Definition
Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. 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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| X | ||||||||||
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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| X | ||||||||||
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- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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