Commitments and contingencies - Narrative (Details) - USD ($) |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
Jan. 12, 2026 |
Oct. 21, 2025 |
Oct. 16, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Litigation And Other Matters [Line Items] | ||||||
| Contingency reserves for litigation liabilities | $ 0 | $ 0 | ||||
| Examination Of Business Tax | ||||||
| Litigation And Other Matters [Line Items] | ||||||
| Loss contingency accrual | 0 | |||||
| FTC Act, Telemarketing Sales Rule | ||||||
| Litigation And Other Matters [Line Items] | ||||||
| Settlement amount awarded to other party | $ 45,000,000.0 | |||||
| Payments for legal settlements | $ 11,500,000 | $ 33,500,000 | ||||
| Loss contingency accrual | $ 11,500,000 | |||||
| Loss reserve established | $ 5,000,000.0 | |||||
| Legal fees incurred | $ 0 | $ 1,900,000 | ||||