Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue Recognition (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Revenue Recognition (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
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Inventories $ 1,474       $ 1,411       $ 1,474 $ 1,411   $ 1,384
Other current assets 224       125       224 125   114
Other current liabilities 155       169       155 169   123
Deferred income tax liabilities 1,925       2,500       1,925 2,500   2,502
Retained earnings 5,675       9,068       5,675 9,068   9,074
Net revenue                 14,070      
Cost of retail sales                 9,209 6,789 $ 6,908  
Selling, general and administrative, including stock-based compensation and transaction related costs                 1,897 1,188 1,190  
Operating expenses                 970 659 707  
Income tax (expense) benefit                 (60) 985 (316)  
Net income 273 $ 72 $ 187 $ 142 $ 887 $ 119 $ 111 $ 91 916 $ 2,441 $ 1,235  
Other Current Assets                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Inventory expected return current 121               121      
Other Current Liabilities                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Sales return liability current $ 266               266      
Before Adoption                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Net revenue                 13,916      
Cost of retail sales                 9,196      
Selling, general and administrative, including stock-based compensation and transaction related costs                 1,771      
Operating expenses                 968      
Income tax (expense) benefit                 (58)      
Net income                 905      
ASU 2014-09 | Adjustment                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Inventories                       (27)
Other current assets                       (11)
Other current liabilities                       (46)
Deferred income tax liabilities                       2
Retained earnings                       $ 6
Net revenue                 (154)      
Cost of retail sales                 (13)      
Selling, general and administrative, including stock-based compensation and transaction related costs                 (126)      
Operating expenses                 (2)      
Income tax (expense) benefit                 2      
Net income                 $ (11)