Shareholder Fees	Sep. 30, 2021
Prospectus #1 | Calvert High Yield Bond Fund | Class A
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	3.75%
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert High Yield Bond Fund | Class C
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	1.00%
Prospectus #1 | Calvert High Yield Bond Fund | Class I
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert High Yield Bond Fund | Class R6
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Income Fund | Class A
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	3.75%
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Income Fund | Class C
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	1.00%
Prospectus #1 | Calvert Income Fund | Class I
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Core Bond Fund | Class A
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	3.75%
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Core Bond Fund | Class I
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Short Duration Income Fund | Class A
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	2.75%
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Short Duration Income Fund | Class C
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	1.00%
Prospectus #1 | Calvert Short Duration Income Fund | Class I
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #1 | Calvert Short Duration Income Fund | Class R6
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #2 | Calvert Ultra-Short Duration Income Fund | Class A
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #2 | Calvert Ultra-Short Duration Income Fund | Class I
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none
Prospectus #2 | Calvert Ultra-Short Duration Income Fund | Class R6
Shareholder Fees:
Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)	none
Maximum Deferred Sales Charge (load) (as a percentage of the lower of net asset value at purchase or redemption)	none