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Class A C R R6 Y [Member] Annual Fund Operating Expenses - Class A C R R6 Y - PUTNAM CONVERTIBLE SECURITIES FUND
Oct. 31, 2025
Class C Shares  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 1.00%
Other Expenses (as a percentage of Assets): 0.17%
Expenses (as a percentage of Assets) 1.77%
Class A Shares  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 0.16%
Expenses (as a percentage of Assets) 1.01%
Class R Shares  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 0.50%
Other Expenses (as a percentage of Assets): 0.16%
Expenses (as a percentage of Assets) 1.26%
Class Y Shares  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.16%
Expenses (as a percentage of Assets) 0.76%
Class R6 Shares  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.60%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.11%
Expenses (as a percentage of Assets) 0.71%