Compensation Plans - Stock Based Compensation (Details) - USD ($) $ in Billions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Share-Based Payment Arrangement [Abstract] | |||
| Total stock-based compensation expense | $ 19.5 | $ 15.7 | $ 13.4 |
| Stock-based compensation expense, awards we expect to settle in Alphabet stock | 18.8 | 15.0 | 12.8 |
| Tax benefits on total stock-based compensation expense | 3.9 | 3.1 | 2.7 |
| Tax benefit realized related to awards vested or exercised | $ 4.7 | $ 5.9 | $ 3.6 |