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John Hancock Managed Account Shares High Yield Municipal Bond Portfolio Average Annual Total Returns
12 Months Ended 35 Months Ended
May 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent   4.25% 3.07%
Bloomberg High Yield Municipal Bond Index (reflects no deduction for fees, expenses, or taxes)[Member]      
Prospectus [Line Items]      
Average Annual Return, Percent   2.46% 4.58%
None or SAME      
Prospectus [Line Items]      
Average Annual Return, Percent   2.73% 4.89%
Performance Inception Date Feb. 08, 2023    
None or SAME | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent   0.67% 2.85%
None or SAME | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent   1.82% 2.87%