Shareholder Fees	Oct. 31, 2025
Eaton Vance Floating-Rate Fund | Eaton Vance Floating-Rate Fund Advisers Class
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%
Eaton Vance Floating-Rate Fund | Eaton Vance Floating-Rate Fund Class A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	3.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%	[1]
Eaton Vance Floating-Rate Fund | Eaton Vance Floating-Rate Fund 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 of Offering Price)	1.00%
Eaton Vance Floating-Rate Fund | Eaton Vance Floating-Rate Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%
Eaton Vance Floating-Rate Fund | Eaton Vance Floating-Rate Fund Class R6
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%
Eaton Vance Floating-Rate & High Income Fund | Eaton Vance Floating-Rate & High Income Fund Advisers Class
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%
Eaton Vance Floating-Rate & High Income Fund | Eaton Vance Floating-Rate & High Income Fund Class A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	3.25%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%	[2]
Eaton Vance Floating-Rate & High Income Fund | Eaton Vance Floating-Rate & High Income Fund 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 of Offering Price)	1.00%
Eaton Vance Floating-Rate & High Income Fund | Eaton Vance Floating-Rate & High Income Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%
Eaton Vance Floating-Rate & High Income Fund | Eaton Vance Floating-Rate & High Income Fund Class R6
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price)	0.00%

[1] Class A shares purchased at net asset value in amounts of $500,000 or more are subject to a 0.75% contingent deferred sales charge if redeemed within 12 months of purchase.

[2] Class A shares purchased at net asset value in amounts of $500,000 or more are subject to a 0.75% contingent deferred sales charge if redeemed within 12 months of purchase.