Annual report pursuant to Section 13 and 15(d)

Revenue Valuation Allowances and Reserves (Details)

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Revenue Valuation Allowances and Reserves (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]        
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount     $ 119  
Sales Returns and Allowances [Member]        
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]        
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount $ 238 $ 242 243 $ 93
Additions- charged to earnings 2,138 2,213 982  
Deductions $ (2,142) (2,214) (979)  
Business Combination [Domain]        
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]        
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount     $ 23  
HSN, Inc. | Sales Returns and Allowances [Member]        
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]        
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired   $ 0