Average Annual Total Returns - Putnam Floating Rate Income Fund

12 Months Ended

60 Months Ended

120 Months Ended

Dec. 31, 2024

Dec. 31, 2024

Dec. 31, 2024

Bloomberg U.S. Aggregate Index (no deduction for fees, expenses or taxes)

Prospectus [Line Items]

Average Annual Return, Percent

1.25%

(0.33%)

1.35%

Morningstar LSTA U.S. Leveraged Loan Index (no deduction for fees, expenses or taxes)

Prospectus [Line Items]

Average Annual Return, Percent

9.01%

5.86%

5.15%

Class A

Prospectus [Line Items]

Average Annual Return, Percent

5.32%

3.91%

3.73%

Class A | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

2.28%

1.69%

1.74%

Class A | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

3.09%

2.00%

1.95%

Class C

Prospectus [Line Items]

Average Annual Return, Percent

6.08%

3.63%

3.34%

Class R

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

7.62%

4.15%

3.71%

Class R6

Prospectus [Line Items]

Average Annual Return, Percent

8.23%

4.75%

4.28%

C 0000022821 [Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.16%

4.65%

4.23%

[1]	Performance for class R6 shares prior to their inception (5/22/18) is derived from the historical performance of class Y and has not been adjusted for the lower investor servicing fees applicable to class R6 shares; had it been adjusted, returns would have been higher.