Expense Example	Nov. 21, 2024 USD ($)
Calamos Convertible Equity Alternative ETF \| Calamos Convertible Equity Alternative ETF \| Calamos Convertible Equity Alternative ETF
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 70
Expense Example, with Redemption, 3 Years	221
Expense Example, with Redemption, 5 Years	384
Expense Example, with Redemption, 10 Years	859
Calamos CEF Income & Arbitrage ETF \| Calamos CEF Income & Arbitrage ETF \| Calamos CEF Income & Arbitrage ETF
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	406
Expense Example, with Redemption, 3 Years	1,230
Expense Example, with Redemption, 5 Years	2,069
Expense Example, with Redemption, 10 Years	4,239
Calamos Alternative Nasdaq & Bond ETF \| Calamos Alternative Nasdaq & Bond ETF \| Calamos Alternative Nasdaq & Bond ETF
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	97
Expense Example, with Redemption, 3 Years	303
Expense Example, with Redemption, 5 Years	525
Expense Example, with Redemption, 10 Years	$ 1,166

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear01
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear03
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear05
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear10
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a

Name:	dei_DocumentInformationDocumentAxis=ck0001579881_doc_Calamos_Convertible_Equity_Alternative_ETFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=ck0001579881_S000081270Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_DocumentInformationDocumentAxis=ck0001579881_doc_Calamos_CEF_Income_Arbitrage_ETFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=ck0001579881_S000083148Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_DocumentInformationDocumentAxis=ck0001579881_doc_Calamos_Alternative_Nasdaq_Bond_ETFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=ck0001579881_S000083476Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: