Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation Adoption of new accounting pronouncements (Details)

v3.10.0.1
Basis of Presentation Adoption of new accounting pronouncements (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jan. 01, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net revenue $ 2,058 $ 2,010 $ 6,234 $ 5,954    
Inventories 1,173   1,173   $ 997 $ 1,019
Prepaid expenses and other current assets 114   114   50 51
Accrued liabilities 679   679   836 872
Accumulated deficit (2,481)   (2,481)   (2,759) (2,772)
Cost of goods sold (exclusive of depreciation and amortization shown separately below) 1,300 1,282 3,906 3,755    
Operating 144 145 433 419    
Selling, general and administrative, including transaction related costs and stock-based compensation 235 180 652 489    
Income tax expense 69 58 224 225    
Net income 173 $ 166 616 $ 452    
Allowance for sales returns 140   140     $ 96
Calculated under Revenue Guidance in Effect before Topic 606 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net revenue 2,020   6,126      
Cost of goods sold (exclusive of depreciation and amortization shown separately below) 1,295   3,892      
Operating 142   430      
Selling, general and administrative, including transaction related costs and stock-based compensation 209   574      
Income tax expense 68   221      
Net income 169   606      
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net revenue 38   108      
Inventories         (22)  
Prepaid expenses and other current assets 58   58   0  
Accrued liabilities         (36)  
Accumulated deficit         14  
Cost of goods sold (exclusive of depreciation and amortization shown separately below) 5   14      
Operating 2   3      
Selling, general and administrative, including transaction related costs and stock-based compensation 26   78      
Income tax expense 1   3      
Net income $ 4   $ 10      
Adjustments for New Accounting Pronouncement [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Inventories         0  
Prepaid expenses and other current assets         (1)  
Accrued liabilities         0  
Accumulated deficit         $ (1)