v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Advisors' Inner Circle Fund II
Entity Central Index Key 0000890540
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
C000255966  
Shareholder Report [Line Items]  
Fund Name Frontier Asset Absolute Return ETF
Class Name Frontier Asset Absolute Return ETF
Trading Symbol FARX
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about the Frontier Asset Absolute Return ETF (the "Fund") for the period from November 1, 2025 to April 30, 2026. You can find additional information about the Fund at https://funds.frontierasset.com/absolute-return-etf. You can also request this information by contacting us at 866-326-3837.
Additional Information Phone Number 866-326-3837
Additional Information Website https://funds.frontierasset.com/absolute-return-etf
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Frontier Asset Absolute Return ETF
$32
0.62%Footnote Reference(1)
FootnoteDescription
Footnote(1)
The expense ratio includes an excise tax fee expense. Had this expense been excluded the ratio would have been 0.60%.
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.62% [1]
AssetsNet $ 12,787,714
Holdings Count | Holding 12
Advisory Fees Paid, Amount $ 35,001
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of April 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$12,787,714
12
$35,001
0%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Percentage of Total Net Assets
Vanguard Short-Term Bond ETF
22.0%
American Beacon AHL Trend ETF
21.0%
Harbor Commodity All Weather Strategy ETF
16.6%
WisdomTree Floating Rate Treasury Fund ETF
8.7%
iMGP DBi Managed Futures Strategy ETF
6.7%
iShares High Yield Systematic Bond ETF
4.5%
iShares U.S. Small-Capital Equity Factor ETF
4.5%
JPMorgan Ultra-Short Income ETF
4.3%
Janus Henderson AAA CLO ETF
3.4%
iShares MSCI USA Momentum Factor ETF
2.9%
Updated Prospectus Phone Number 866-326-3837
Updated Prospectus Web Address https://funds.frontierasset.com/absolute-return-etf
C000255967  
Shareholder Report [Line Items]  
Fund Name Frontier Asset Core Bond ETF
Class Name Frontier Asset Core Bond ETF
Trading Symbol FCBD
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about the Frontier Asset Core Bond ETF (the "Fund") for the period from November 1, 2025 to April 30, 2026. You can find additional information about the Fund at https://funds.frontierasset.com/core-bond-etf. You can also request this information by contacting us at 866-326-3837.
Additional Information Phone Number 866-326-3837
Additional Information Website https://funds.frontierasset.com/core-bond-etf
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Frontier Asset Core Bond ETF
$38
0.77%Footnote Reference(1)
FootnoteDescription
Footnote(1)
The expense ratio includes an excise tax fee expense. Had this expense been excluded the ratio would have been 0.60%.
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.77% [2]
AssetsNet $ 40,673,623
Holdings Count | Holding 7
Advisory Fees Paid, Amount $ 130,329
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of April 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$40,673,623
7
$130,329
0%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.3%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Holdings

Table Summary
Holding Name
Percentage of Total Net Assets
Vanguard Intermediate-Term Treasury ETF
24.9%
TCW Flexible Income ETF
24.3%
JPMorgan Core Plus Bond ETF
18.5%
Regan Floating Rate MBS ETF
10.0%
WisdomTree Floating Rate Treasury Fund ETF
9.9%
JPMorgan Ultra-Short Income ETF
6.5%
iShares Investment Grade Systematic Bond ETF
5.3%
Updated Prospectus Phone Number 866-326-3837
Updated Prospectus Web Address https://funds.frontierasset.com/core-bond-etf
C000255969  
Shareholder Report [Line Items]  
Fund Name Frontier Asset Opportunistic Credit ETF
Class Name Frontier Asset Opportunistic Credit ETF
Trading Symbol FOPC
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about the Frontier Asset Opportunistic Credit ETF (the "Fund") for the period from November 1, 2025 to April 30, 2026. You can find additional information about the Fund at https://funds.frontierasset.com/opportunistic-credit-etf. You can also request this information by contacting us at 866-326-3837.
Additional Information Phone Number 866-326-3837
Additional Information Website https://funds.frontierasset.com/opportunistic-credit-etf
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Frontier Asset Opportunistic Credit ETF
$30
0.60%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
AssetsNet $ 33,169,555
Holdings Count | Holding 8
Advisory Fees Paid, Amount $ 103,169
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of April 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$33,169,555
8
$103,169
4%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.4%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Holdings

Table Summary
Holding Name
Percentage of Total Net Assets
TCW Flexible Income ETF
25.3%
Vanguard Intermediate-Term Treasury ETF
16.7%
iShares Investment Grade Systematic Bond ETF
16.1%
JPMorgan Core Plus Bond ETF
15.2%
Schwab US TIPS ETF
8.0%
iShares MBS ETF
7.0%
Vanguard Short-Term Inflation-Protected Securities ETF
6.4%
PIMCO Multisector Bond Active ETF
4.8%
Updated Prospectus Phone Number 866-326-3837
Updated Prospectus Web Address https://funds.frontierasset.com/opportunistic-credit-etf
C000255968  
Shareholder Report [Line Items]  
Fund Name Frontier Asset Global Small Cap Equity ETF
Class Name Frontier Asset Global Small Cap Equity ETF
Trading Symbol FGSM
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about the Frontier Asset Global Small Cap Equity ETF (the "Fund") for the period from November 1, 2025 to April 30, 2026. You can find additional information about the Fund at https://funds.frontierasset.com/global-small-cap-equity-etf. You can also request this information by contacting us at 866-326-3837.
Additional Information Phone Number 866-326-3837
Additional Information Website https://funds.frontierasset.com/global-small-cap-equity-etf
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Frontier Asset Global Small Cap Equity ETF
$32
0.60%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.60%
AssetsNet $ 59,296,426
Holdings Count | Holding 6
Advisory Fees Paid, Amount $ 182,345
InvestmentCompanyPortfolioTurnover 3.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of April 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$59,296,426
6
$182,345
3%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.6%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Holdings

Table Summary
Holding Name
Percentage of Total Net Assets
Avantis International Small Capital Value ETF
28.0%
iShares Core S&P Small-Capital ETF
21.9%
iShares U.S. Small-Capital Equity Factor ETF
21.8%
Avantis U.S. Small Capital Value ETF
11.7%
iShares International Small-Capital Equity Factor ETF
10.3%
Neuberger Small-Mid Capital ETF
5.9%
Updated Prospectus Phone Number 866-326-3837
Updated Prospectus Web Address https://funds.frontierasset.com/global-small-cap-equity-etf
C000255970  
Shareholder Report [Line Items]  
Fund Name Frontier Asset Total International Equity ETF
Class Name Frontier Asset Total International Equity ETF
Trading Symbol FINT
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about the Frontier Asset Total International Equity ETF (the "Fund") for the period from November 1, 2025 to April 30, 2026. You can find additional information about the Fund at https://funds.frontierasset.com/total-intl-equity-etf. You can also request this information by contacting us at 866-326-3837.
Additional Information Phone Number 866-326-3837
Additional Information Website https://funds.frontierasset.com/total-intl-equity-etf
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Frontier Asset Total International Equity ETF
$32
0.60%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.60%
AssetsNet $ 69,587,916
Holdings Count | Holding 8
Advisory Fees Paid, Amount $ 178,729
InvestmentCompanyPortfolioTurnover 5.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of April 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$69,587,916
8
$178,729
5%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.7%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Holdings

Table Summary
Holding Name
Percentage of Total Net Assets
Avantis Emerging Markets Equity ETF
21.8%
iShares MSCI International Quality Factor ETF
15.6%
iShares International Equity Factor ETF
15.2%
iShares Emerging Markets Equity Factor ETF
10.8%
Vanguard International Dividend Appreciation ETF
10.2%
First Eagle Overseas Equity ETF
9.9%
Cambria Foreign Shareholder Yield ETF
9.1%
Franklin International Low Volatility High Dividend Index ETF
7.2%
Updated Prospectus Phone Number 866-326-3837
Updated Prospectus Web Address https://funds.frontierasset.com/total-intl-equity-etf
C000255971  
Shareholder Report [Line Items]  
Fund Name Frontier Asset U.S. Large Cap Equity ETF
Class Name Frontier Asset U.S. Large Cap Equity ETF
Trading Symbol FLCE
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about the Frontier Asset U.S. Large Cap Equity ETF (the "Fund") for the period from November 1, 2025 to April 30, 2026. You can find additional information about the Fund at https://funds.frontierasset.com/us-large-cap-equity-etf. You can also request this information by contacting us at 866-326-3837.
Additional Information Phone Number 866-326-3837
Additional Information Website https://funds.frontierasset.com/us-large-cap-equity-etf
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Frontier Asset U.S. Large Cap Equity ETF
$31
0.60%
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.60%
AssetsNet $ 71,340,584
Holdings Count | Holding 7
Advisory Fees Paid, Amount $ 183,888
InvestmentCompanyPortfolioTurnover 18.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of April 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$71,340,584
7
$183,888
18%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Exchange-Traded Funds
99.8%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Holdings

Table Summary
Holding Name
Percentage of Total Net Assets
T Rowe Price US Equity Research ETF
26.1%
iShares U.S. Equity Factor ETF
18.8%
JPMorgan Active Value ETF
15.4%
Vanguard Dividend Appreciation ETF
12.0%
JPMorgan Active Growth ETF
11.3%
T Rowe Price Capital Appreciation Equity ETF
11.1%
GMO US Quality ETF
5.1%
Updated Prospectus Phone Number 866-326-3837
Updated Prospectus Web Address https://funds.frontierasset.com/us-large-cap-equity-etf
[1] The expense ratio includes an excise tax fee expense. Had this expense been excluded the ratio would have been 0.60%.
[2] The expense ratio includes an excise tax fee expense. Had this expense been excluded the ratio would have been 0.60%.