Expense Example, No Redemption - First Eagle Core Plus Municipal Fund	Oct. 31, 2025 USD ($)
Class A
Prospectus [Line Items]
Expense Example, No Redemption, 1 Year	$ 319
Expense Example, No Redemption, 3 Years	584
Class C
Prospectus [Line Items]
Expense Example, No Redemption, 1 Year	147
Expense Example, No Redemption, 3 Years	575
Class I
Prospectus [Line Items]
Expense Example, No Redemption, 1 Year	45
Expense Example, No Redemption, 3 Years	264
Class R6
Prospectus [Line Items]
Expense Example, No Redemption, 1 Year	45
Expense Example, No Redemption, 3 Years	$ 264