Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Narrative) (Details)

v3.10.0.1
Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 29, 2017
Finite-Lived Intangible Assets [Line Items]        
Weighted average useful life at time of acquisition 9 years      
Amortization of Intangible Assets $ 426 $ 549 $ 703  
Goodwill, Impaired, Accumulated Impairment Loss $ 0      
HSN, Inc.        
Finite-Lived Intangible Assets [Line Items]        
Business Acquisition, Percentage of Voting Interests Acquired       62.00%