Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (HSN Tradename Impairment) (Details)

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Goodwill and Other Intangible Assets (HSN Tradename Impairment) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
HSN | Trade Names  
Indefinite-lived Intangible Assets [Line Items]  
Impairment of intangible assets $ 30