| Information About Liberty's Operating Segments (Other Information By Segment) (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended | ||
|---|---|---|---|
| Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011 | |
| Total assets | $ 17,031 | $ 17,339 | |
| Investments in affiliates, accounted for using the equity method | 1,213 | 1,135 | |
| Capital expenditures | 151 | 103 | |
| QVC [Member] | |||
| Total assets | 12,924 | ||
| Investments in affiliates, accounted for using the equity method | 11 | ||
| Capital expenditures | 101 | ||
| E-commerce [Member] | |||
| Total assets | 1,536 | ||
| Investments in affiliates, accounted for using the equity method | 10 | ||
| Capital expenditures | 50 | ||
| Expedia [Member] | |||
| Investments in affiliates, accounted for using the equity method | 0 | ||
| Capital expenditures | 117 | ||
| Corporate And Other [Member] | |||
| Total assets | 2,571 | ||
| Investments in affiliates, accounted for using the equity method | 1,192 | ||
| Capital expenditures | 0 | ||
| equity method elimination [Member] | |||
| Total assets | (7,505) | ||
| Investments in affiliates, accounted for using the equity method | 0 | ||
| Capital expenditures | $ (117) | ||