v3.25.2
S000026835 [Member] Annual Total Returns
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
TWEEDY, BROWNE INTERNATIONAL VALUE FUND II - CURRENCY UNHEDGED | TWEEDY BROWNE INTERNATIONAL VALUE FUND II - CURRENCY UNHEDGED                    
Prospectus [Line Items]                    
Annual Return [Percent] [1] (2.40%) 12.70% (8.18%) 10.76% (0.02%) 13.66% (8.99%) 21.60% 2.34% (5.39%)
[1] The 2025 year‑to‑date return for the International Value Fund II – Currency Unhedged through June 30, 2025 was 21.53%.