v3.26.1
Annual Total Returns
 12 Months Ended
Dec. 31, 2025
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
Baillie Gifford China Equities Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 36.53% 9.76% (18.03%) (28.43%)            
Baillie Gifford Emerging Markets Equities Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 40.60% 5.89% 14.21% (26.52%) (8.82%) 28.91% 27.94% (14.98%) 52.95% 2.93%
Baillie Gifford Emerging Markets ex China Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 43.26% 6.07% 23.87% (25.07%)            
Baillie Gifford Global Alpha Equities Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 17.27% 10.76% 19.50% (29.14%) 7.53% 36.22% 32.56% (9.42%) 34.53% 4.79%
Baillie Gifford International Alpha Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 19.45% 4.93% 18.60% (28.67%) (0.74%) 26.29% 32.11% (16.68%) 34.92% 5.08%
Baillie Gifford International Concentrated Growth Equities Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 16.56% 18.34% 14.75% (39.58%) 0.69% 97.09% 45.32% (13.23%)    
Baillie Gifford International Growth Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 17.23% 7.80% 14.20% (34.49%) (9.49%) 62.84% 37.25% (17.34%) 46.00% 1.19%
Baillie Gifford Long Term Global Growth Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 16.26% 24.92% 36.43% (46.08%) 2.40% 101.61% 33.40% (1.47%) 54.01% (3.95%)
Baillie Gifford U.S. Equity Growth Fund - Institutional & K Class Prospectus | Institutional Class                    
Prospectus [Line Items]                    
Annual Return [Percent] 10.25% 30.44% 45.93% (55.63%) (4.25%) 125.43% 30.01% 8.30% 34.72%  
Baillie Gifford Emerging Markets Equities Fund - Class 2,3,4 & 5 Prospectus | Class 5                    
Prospectus [Line Items]                    
Annual Return [Percent] 40.92% 6.12% 14.48% (26.33%) (8.61%) 29.25% 28.19% (14.80%) 53.25% 3.24%
Baillie Gifford Global Alpha Equities Fund - Class 2,3,4 & 5 Prospectus | Class 2                    
Prospectus [Line Items]                    
Annual Return [Percent] 17.46% 10.92% 19.61% (29.08%) 7.65% 36.31% 32.56% (9.44%) 34.56% 4.95%
Baillie Gifford International Alpha Fund - Class 2,3,4 & 5 Prospectus | Class 2                    
Prospectus [Line Items]                    
Annual Return [Percent] 19.58% 5.05% 18.72% (28.64%) (0.65%) 26.45% 32.14% (16.57%) 34.96% 5.24%
Baillie Gifford International Growth Fund - Class 2,3,4 & 5 Prospectus | Class 2                    
Prospectus [Line Items]                    
Annual Return [Percent] 17.28% 7.86% 14.31% (34.43%) (9.40%) 62.95% 37.34% (17.33%) 46.09% 1.34%
Baillie Gifford Long Term Global Growth Fund - Class 2,3,4 & 5 Prospectus | Class 2                    
Prospectus [Line Items]                    
Annual Return [Percent] 16.38% 25.01% 36.60% (46.04%) 2.50% 101.77% 33.49% (1.42%) 54.07% (3.80%)