Stock-based compensation - Schedule of Stock-based Compensation Expense by Award Type (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Total stock-based compensation expense | $ 30 | $ 40 |
| Time-Based Restricted Stock Unit Awards | ||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Total stock-based compensation expense | 15 | 16 |
| Performance-Based Restricted Stock Unit Awards | ||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Total stock-based compensation expense | 2 | 2 |
| Time-Based Long-Term Incentive Plant (LTIP) Awards | ||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Total stock-based compensation expense | 9 | 14 |
| Performance-Based Long-Term Incentive Plan (LTIP) Awards | ||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Total stock-based compensation expense | $ 4 | $ 8 |