Employee Benefit Plans - Summary of Defined Benefit Obligation Analyzed by Participant Group and Geography (Detail) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Thomson Reuters Group Pension Plan [Member] | ||
| Disclosure Of Net Defined Benefit Liability Asset [Line Items] | ||
| Weighted average duration of defined benefit obligation | 12 years | 12 years |
| The Thomson Corporation PLC Pension Scheme [Member] | ||
| Disclosure Of Net Defined Benefit Liability Asset [Line Items] | ||
| Weighted average duration of defined benefit obligation | 12 years | 13 years |