Summary of Significant Accounting Policies - Allowance for Sales Returns (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Sales returns, beginning balance | $ 215 | $ 274 | $ 300 |
| Additions, charged to earnings | 1,898 | 1,917 | 2,145 |
| Deductions | (1,894) | (1,976) | (2,171) |
| Sales returns, ending balance | 219 | 215 | 274 |
| Stock-based compensation | 53 | 60 | 72 |
| Selling, General and Administrative Expenses | |||
| Advertising Expense | $ 509 | $ 548 | $ 560 |