Goodwill and Other Intangible Assets - Zulily Impairment (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Indefinite-lived Intangible Assets [Line Items] | |||
| Impairments of goodwill | $ 440 | ||
| Accumulated goodwill impairment losses | 440 | ||
| Zulily | |||
| Indefinite-lived Intangible Assets [Line Items] | |||
| Impairments of goodwill | $ 440 | 440 | |
| Accumulated goodwill impairment losses | 440 | ||
| Zulily | Trade Names | |||
| Indefinite-lived Intangible Assets [Line Items] | |||
| Impairment of intangible assets | $ 580 | ||
| HSN, Inc. | |||
| Indefinite-lived Intangible Assets [Line Items] | |||
| Impairments of goodwill | $ 0 | ||
| HSN, Inc. | Trade Names | |||
| Indefinite-lived Intangible Assets [Line Items] | |||
| Impairment of intangible assets | $ 147 | $ 30 | |