v3.26.1
Average Annual Total Returns
 12 Months Ended 52 Months Ended 60 Months Ended 98 Months Ended
Apr. 30, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Global Atlantic BlackRock Allocation Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   15.77%   7.47% 8.32%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Allocation Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   15.42%   7.20% 8.05%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Core Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   20.22%   14.90% 14.69%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Core Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   19.83%   14.60% 14.39%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Growth Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   22.55% 13.49%    
Performance Inception Date Aug. 20, 2021        
Global Atlantic BlackRock Disciplined Growth Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   22.27%   14.95% 17.03%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined International Core Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   32.60%   8.36% 6.93%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined International Core Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   32.33%   8.12% 6.67%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Mid Cap Growth Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   10.12%   6.96% 12.12%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Mid Cap Growth Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   9.90%   6.69% 11.85%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Value Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   17.17%   12.42% 10.45%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock Disciplined Value Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   16.90%   12.12% 10.19%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock High Yield Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   6.87%   4.15% 4.35%
Performance Inception Date Nov. 01, 2017        
Global Atlantic BlackRock High Yield Portfolio Class II Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   6.64%   3.90% 4.10%
Performance Inception Date Nov. 01, 2017        
Global Atlantic Goldman Sachs Core Fixed Income Portfolio Class I Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   7.80%   (0.53%) 1.82%
Performance Inception Date Nov. 01, 2017        
S&P Target Risk® Growth Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   16.59%   7.05% 7.50%
MSCI ACWI Index (Net Total Return, USD) (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   22.34%   11.19% 10.98%
S&P 500® Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   17.88%   14.42% 14.58%
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   18.56%   15.32% 18.29%
Russell 1000® Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   17.37%   13.59% 14.30%
MSCI ACWI ex-USA Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   32.39%   7.91% 6.96%
Russell Midcap® Growth Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   8.66%   6.65% 11.96%
Russell 1000® Value Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   15.91%   11.33% 9.69%
ICE BofA BB-B U.S. High Yield Constrained Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   8.73%   4.11% 4.78%
Bloomberg US Universal Bond Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   7.58%   0.06% 2.04%
Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes)          
Prospectus [Line Items]          
Average Annual Return, Percent   7.30%   (0.36%) 1.74%