Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies Common control transaction (Details)

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Summary of Significant Accounting Policies Common control transaction (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2018
Dec. 29, 2017
Business Acquisition [Line Items]                          
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed                 $ 60 $ 39      
Cash and cash equivalents $ 543       $ 282       543 282      
Accounts receivable, less allowance for doubtful accounts of $112 at December 31, 2018 and $91 at December 31, 2017 1,787       1,680       1,787 1,680      
Inventories 1,280       1,204       1,280 1,204   $ 1,182  
Property and equipment, net 1,165       1,170       1,165 1,170      
Goodwill 5,972       5,979       5,972 5,979 $ 4,995    
Other intangible assets, net 3,666       3,770       3,666 3,770      
Deferred income taxes (700)       (730)       (700) (730)      
Other long-term liabilities 173       128       173 128      
Business Combination, Consideration Transferred                   1,671      
Operating income 461 $ 305 $ 390 $ 356 458 $ 274 $ 306 $ 271 1,512 1,309 1,203    
HSN, Inc.                          
Business Acquisition [Line Items]                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Technology                         $ 105
Business Acquisition, Pro Forma Revenue                   11,114 11,161    
Cash and cash equivalents                         22
Accounts receivable, less allowance for doubtful accounts of $112 at December 31, 2018 and $91 at December 31, 2017                         292
Inventories                         185
Property and equipment, net                         165
Goodwill $ 922       $ 904       922 904 0   904
Other intangible assets, net                         1,165
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles                         425
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capitalized Software                         7
Other Assets                         37
Accounts Payable and Accrued Liabilities                         (366)
Long-term Debt                         (460)
Deferred income taxes                         (263)
Other long-term liabilities                         $ (10)
Business Acquisition, Pro Forma Operating Income (Loss)                   1,163 $ 1,222    
Business Combination, Consideration Transferred                   $ 1,671      
Operating income                 $ 38        
Purchased and internally developed software                          
Business Acquisition [Line Items]                          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life                 3 years        
Customer Relationships [Member]                          
Business Acquisition [Line Items]                          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life                 9 years        
Technology [Member]                          
Business Acquisition [Line Items]                          
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life                 7 years