Goodwill - Summary of Carrying Amount of Goodwill by Cash Generating Unit (Detail) - USD ($) $ in Millions |
Dec. 31, 2021 |
Oct. 01, 2021 |
Dec. 31, 2020 |
|---|---|---|---|
| Disclosure of information for cash-generating units [Line Items] | |||
| Goodwill | $ 5,940 | $ 5,976 | |
| Legal Professionals [member] | |||
| Disclosure of information for cash-generating units [Line Items] | |||
| Goodwill | $ 3,364 | ||
| Corporates [member] | |||
| Disclosure of information for cash-generating units [Line Items] | |||
| Goodwill | 1,306 | ||
| Tax & Accounting Professionals [member] | |||
| Disclosure of information for cash-generating units [Line Items] | |||
| Goodwill | 877 | ||
| Reuters News [member] | |||
| Disclosure of information for cash-generating units [Line Items] | |||
| Goodwill | 138 | ||
| Global Print [member] | |||
| Disclosure of information for cash-generating units [Line Items] | |||
| Goodwill | $ 250 |