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Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
Common Class A [Member]
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Dec. 31, 2012
Common Class A [Member]
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Sep. 30, 2013
SIRIUS XM [Member]
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Sep. 30, 2013
SIRIUS XM [Member]
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| Outstanding options | Ìý | Ìý | Ìý | Ìý | 3,881,000 | 5,219,000 | 277,000,000 | 277,000,000 |
| Options granted | Ìý | Ìý | Ìý | Ìý | 0 | Ìý | Ìý | Ìý |
| Total unrecognized compensation cost related to unvested Liberty equity awards | $ 75 | Ìý | $ 75 | Ìý | Ìý | Ìý | $ 339 | $ 339 |
| Weighted average period of recognition related to unvested Liberty equity awards (in years) | Ìý | Ìý | 2 years 2 months 12 days | Ìý | Ìý | Ìý | Ìý | 3 years |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | Ìý | Ìý | Ìý | Ìý | 1,811,000 | Ìý | 121,000,000 | 121,000,000 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | Ìý | Ìý | Ìý | Ìý | $ 91.36 | $ 98.77 | $ 2.34 | $ 2.34 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | Ìý | Ìý | Ìý | Ìý | $ 87.87 | Ìý | $ 2.21 | $ 2.21 |
| Share-based Compensation | $ 52 | $ 7 | $ 141 | $ 18 | Ìý | Ìý | $ 38 | $ 97 |
| X | ||||||||||
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- Definition
As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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
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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- Definition
The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including 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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