Stock-based compensation - Summary of Stock-based Compensation Expense in the Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | $ 29 | $ 6 | $ 69 | $ 11 |
| Cost of operations | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | 4 | 0 | 5 | 0 |
| General and administrative expense | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | 23 | 6 | 59 | 11 |
| Acquisition, transaction, and other expense | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | $ 2 | $ 0 | $ 5 | $ 0 |