|
Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2012
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Aug. 09, 2012
|
Jun. 24, 2010
|
May 01, 2007
|
Dec. 31, 2000
|
Dec. 31, 2012
Minimum [Member]
|
Dec. 31, 2012
Maximum [Member]
|
Dec. 31, 2012
Interactive Group [Member]
|
Dec. 31, 2012
Interactive Group [Member]
|
Dec. 31, 2012
Ventures Group [Member]
|
Dec. 31, 2012
Ventures Group [Member]
|
Dec. 31, 2011
Ventures Group [Member]
|
Dec. 31, 2012
TripAdvisor, Inc. [Member]
|
Dec. 04, 2012
Unvested Option Exchange [Member]
Interactive Group [Member]
|
Dec. 04, 2012
Unvested Option Exchange [Member]
Ventures Group [Member]
|
Dec. 04, 2012
Unvested Option Exchange Incremental [Member]
Interactive Group [Member]
|
Dec. 04, 2012
Unvested Option Exchange Incremental [Member]
Ventures Group [Member]
|
Dec. 31, 2012
Option Exchange [Member]
Interactive Group [Member]
|
Dec. 31, 2012
Option Exchange [Member]
Ventures Group [Member]
|
Dec. 31, 2012
Option Exchange [Member]
|
|
| Stockholders' Equity Note, Stock Split, Conversion Ratio | 0.05 | ||||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 50,000,000 | 42,900,000 | 7,300,000 | 7,800,000 | |||||||||||||||||||
| Options granted | 6,200,000 | 10,600,000 | 20,100,000 | 3,413,000 | 900,000 | 36,000 | 3,700,000 | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 1 year 3 months 19 days | 9 years | |||||||||||||||||||||
| Weighted average grant-date fair value of options | $ 7.32 | $ 7.11 | $ 7.15 | $ 8.44 | $ 26.58 | $ 27.29 | |||||||||||||||||
| Weighted average period of recognition related to unvested Liberty equity awards (in years) | 1 year 8 months 12 days | 3 years | |||||||||||||||||||||
| Dividend rate to estimate fair value | 0.00% | ||||||||||||||||||||||
| Total unrecognized compensation cost related to unvested Liberty equity awards | $ 170 | $ 60 | $ 55 | $ 7 | $ 54 | $ 10 | |||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost | 17 | 4 | |||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value | 339 | 33 | 23 | 242 | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | 2,200,000 | 2,200,000 | 100,000 | 100,000 | 4,600,000 | 300,000 | |||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ 13.13 | $ 13.13 | $ 4.82 | $ 4.82 | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value | $ 12 | $ 14 | $ 10 | ||||||||||||||||||||
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ 58.49 | $ 20.36 | |||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 1,155,000 | 1,155,000 | 0 | 8,700,000 | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | 449,000 | 449,000 | 3,300,000 | ||||||||||||||||||||