Intangible Assets (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 29, 2017 |
Nov. 04, 2016 |
Jul. 22, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Finite-Lived Intangible Assets [Line Items] | ||||||
| Weighted average useful life at time of acquisition | 9 years | |||||
| Amortization of Intangible Assets | $ 549 | $ 703 | $ 550 | |||
| Goodwill, Impaired, Accumulated Impairment Loss | $ 56 | |||||
| Goodwill, Purchase Accounting Adjustments | 57 | |||||
| Liberty Expedia Holdings | ||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||
| Decrease to goodwill due to spin-off | $ 57 | |||||
| CommerceHub | ||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||
| Decrease to goodwill due to spin-off | $ 21 | |||||
| zulily | ||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||
| Goodwill, Purchase Accounting Adjustments | $ 57 | |||||
| HSNi | ||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||
| Percentage of equity method investee not currently owned | 62.00% | |||||