Label

Element

Value

Prospectus [Line Items]

rr_ProspectusLineItems

Document Type

dei_DocumentType

497

Document Period End Date

dei_DocumentPeriodEndDate

Jul. 31, 2019

Entity Registrant Name

dei_EntityRegistrantName

Advisors' Inner Circle Fund II

Entity Central Index Key

dei_EntityCentralIndexKey

0000890540

Amendment Flag

dei_AmendmentFlag

false

Entity Inv Company Type

dei_EntityInvCompanyType

N-1A

Document Creation Date

dei_DocumentCreationDate

Mar. 25, 2020

Document Effective Date

dei_DocumentEffectiveDate

Mar. 25, 2020

Prospectus Date

rr_ProspectusDate

Nov. 28, 2019

CHAMPLAIN SMALL COMPANY FUND

Prospectus [Line Items]

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Supplement to Prospectus [Text Block]

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THE ADVISORS’ INNER CIRCLE FUND II

Champlain Small Company Fund (the “Small Company Fund”)
Champlain Mid Cap Fund (the “Mid Cap Fund”)
Champlain Emerging Markets Fund (the “Emerging Markets Fund” and, together with
the Small Company Fund and Mid Cap Fund, the “Funds”)

Supplement dated March 25, 2020 to:

• each Fund’s Summary Prospectus, dated November 28, 2019 (collectively, the “Summary Prospectuses”); and

• the Funds’ Statutory Prospectus, dated November 28, 2019 (the “Statutory Prospectus,” and, together with the Summary Prospectuses, the “Prospectuses”).

This supplement provides new and additional information beyond that contained in the Prospectuses and should be read in conjunction with the Prospectuses.

The Funds’ after-tax returns have been revised. Accordingly, the Prospectuses are hereby amended and supplemented as follows:

1. In the “Performance Information” section of the Small Company Fund’s Summary Prospectus, and the corresponding section of the Statutory Prospectus, the “Average Annual Total Returns” table is hereby deleted and replaced with the following:

	1 Year	5 Years	10 Years	Since Inception (11.30.04)
Fund Returns Before Taxes
Advisor Shares	-3.18%	7.10%	13.01%	9.66%
Institutional Shares	-2.97%	7.23%	13.07%	9.70%
Fund Returns After Taxes on Distributions
Advisor Shares	-6.23%	5.31%	11.42%	8.28%
Fund Returns After Taxes on Distributions and Sale of Fund Shares
Advisor Shares	-0.29%	5.33%	10.63%	7.78%
Russell 2000 Index (reflects no deduction for fees, expenses or taxes)	-11.01%	4.41%	11.97%	6.94%

Please retain this supplement for future reference.

CSC-SK-016-0100

CHAMPLAIN MID CAP FUND

Prospectus [Line Items]

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Supplement to Prospectus [Text Block]

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THE ADVISORS’ INNER CIRCLE FUND II

Champlain Small Company Fund (the “Small Company Fund”)
Champlain Mid Cap Fund (the “Mid Cap Fund”)
Champlain Emerging Markets Fund (the “Emerging Markets Fund” and, together with
the Small Company Fund and Mid Cap Fund, the “Funds”)

Supplement dated March 25, 2020 to:

• each Fund’s Summary Prospectus, dated November 28, 2019 (collectively, the “Summary Prospectuses”); and

• the Funds’ Statutory Prospectus, dated November 28, 2019 (the “Statutory Prospectus,” and, together with the Summary Prospectuses, the “Prospectuses”).

This supplement provides new and additional information beyond that contained in the Prospectuses and should be read in conjunction with the Prospectuses.

The Funds’ after-tax returns have been revised. Accordingly, the Prospectuses are hereby amended and supplemented as follows:

2.  In the “Performance Information” section of the Mid Cap Fund’s Summary Prospectus, and the corresponding section of the Statutory Prospectus, the “Average Annual Total Returns” table is hereby deleted and replaced with the following:

	1 Year	5 Years	10 Years	Since Inception
Fund Returns Before Taxes
Advisor Shares1	3.53%	9.75%	14.41%	10.81%
Institutional Shares2	3.76%	10.01%	14.64%	11.02%
Fund Returns After Taxes on Distributions
Advisor Shares	1.67%	7.73%	12.72%	9.24%
Fund Returns After Taxes on Distributions and Sale of Fund Shares
Advisor Shares	2.89%	7.14%	11.57%	8.43%
Russell Midcap Index (reflects no deduction for fees, expenses or taxes)3	-9.06%	6.26%	14.03%	8.48%

1 Advisor Shares of the Fund were offered beginning June 30, 2008.

2 Institutional Shares of the Fund were offered beginning January 3, 2011.

3 Index comparison begins June 30, 2008.

Please retain this supplement for future reference.

CSC-SK-016-0100

CHAMPLAIN EMERGING MARKETS FUND

Prospectus [Line Items]

rr_ProspectusLineItems

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

THE ADVISORS’ INNER CIRCLE FUND II

Champlain Small Company Fund (the “Small Company Fund”)
Champlain Mid Cap Fund (the “Mid Cap Fund”)
Champlain Emerging Markets Fund (the “Emerging Markets Fund” and, together with
the Small Company Fund and Mid Cap Fund, the “Funds”)

Supplement dated March 25, 2020 to:

• each Fund’s Summary Prospectus, dated November 28, 2019 (collectively, the “Summary Prospectuses”); and

• the Funds’ Statutory Prospectus, dated November 28, 2019 (the “Statutory Prospectus,” and, together with the Summary Prospectuses, the “Prospectuses”).

This supplement provides new and additional information beyond that contained in the Prospectuses and should be read in conjunction with the Prospectuses.

The Funds’ after-tax returns have been revised. Accordingly, the Prospectuses are hereby amended and supplemented as follows:

3. In the “Performance Information” section of the Emerging Market Fund’s Summary Prospectus, and the corresponding section of the Statutory Prospectus, the “Average Annual Total Returns” table is hereby deleted and replaced with the following:

	1 Year	Since Inception (09.08.14)
Fund Returns Before Taxes
Advisor Shares	-17.37%	-3.12%
Fund Returns After Taxes on Distributions
Advisor Shares	-17.37%	-3.22%
Fund Returns After Taxes on Distributions and Sale of Fund Shares
Advisor Shares	-10.29%	-2.34%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)1	-14.58%	-0.61%

1 Index comparison begins September 30, 2014.

Please retain this supplement for future reference.

CSC-SK-016-0100