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