v3.26.1
S000034097 [Member] Shareholder Fees - Loomis Sayles Senior Floating Rate and Fixed Income Fund
Nov. 30, 2025
Class A  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.50%
Maximum Deferred Sales Charge (as a percentage) 0.00% [1]
Redemption Fee (as a percentage of Amount Redeemed) 0.00%
Class C  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 1.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00%
Class Y  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00%
Class N  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
Redemption Fee (as a percentage of Amount Redeemed) 0.00%
[1] A 1.00% contingent deferred sales charge (“CDSC”) may apply to certain purchases of Class A shares of $1,000,000 or more that are redeemed within eighteen months of the date of purchase.