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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Jan. 01, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net revenue $ 2,083 $ 1,979 $ 4,176 $ 3,944    
Inventories 1,038   1,038   $ 997 $ 1,019
Prepaid expenses and other current assets 114   114   50 51
Accrued liabilities 651   651   836 872
Accumulated deficit (2,583)   (2,583)   (2,759) (2,772)
Cost of goods sold (exclusive of depreciation and amortization shown separately below) 1,286 1,230 2,606 2,473    
Operating 144 137 289 274    
Selling, general and administrative, including transaction related costs and stock-based compensation 209 152 417 309    
Income tax expense (76) (90) (155) (167)    
Net income 236 $ 151 443 $ 286    
Allowance for sales returns 123   123     $ 96
Calculated under Revenue Guidance in Effect before Topic 606 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net revenue 2,062   4,106      
Cost of goods sold (exclusive of depreciation and amortization shown separately below) 1,287   2,597      
Operating 144   288      
Selling, general and administrative, including transaction related costs and stock-based compensation 183   365      
Income tax expense (77)   (153)      
Net income 239   437      
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Net revenue 21   70      
Inventories         (22)  
Prepaid expenses and other current assets 51   51   0  
Accrued liabilities         (36)  
Accumulated deficit         14  
Cost of goods sold (exclusive of depreciation and amortization shown separately below) (1)   9      
Operating 0   1      
Selling, general and administrative, including transaction related costs and stock-based compensation 26   52      
Income tax expense (1)   2      
Net income $ (3)   $ 6      
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)