S000050481 [Member] Expense Example - S000050481 [Member] - C000159357 [Member]	Mar. 31, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 16
Expense Example, with Redemption, 3 Years	52
Expense Example, with Redemption, 5 Years	90
Expense Example, with Redemption, 10 Years	$ 205

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

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

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

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

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Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	oef_ClassAxis=cetftii_C000159357Member
Namespace Prefix:
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Balance Type:
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