Stock Options and Other Share-Based Awards Stock Options and Other Share-Based Awards (Stock Options Valuations Assumptions) (Details) - Liberty Incentive Plan - QVCA - Stock options |
12 Months Ended | ||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Black- Scholes option pricing model valuation assumptions | |||
| Expected volatility | 30.30% | 27.40% | 39.70% |
| Expected term (years) | 5 years 11 months | 6 years 1 month | 5 years 11 months |
| Risk free interest rate | 2.10% | 1.60% | 1.70% |
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- References No definition available.
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average expected volatility rate of share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Expected term of share-based compensation awards, 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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