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Shareholder Report
 6 Months Ended
Dec. 31, 2024
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Frontier Funds, Inc.
Entity Central Index Key 0001014913
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2024
Institutional Class  
Shareholder Report [Line Items]  
Fund Name Frontier MFG Global Sustainable Fund
Class Name Institutional Class
Trading Symbol FMSGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Frontier MFG Global Sustainable Fund for the period of July 1, 2024, to December 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at   https://frontiermutualfunds.com/resources/. You can also request this information by contacting us at 888-825-2100.
Additional Information Phone Number 888-825-2100
Additional Information Website https://frontiermutualfunds.com/resources/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class
$41
0.80%
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.80%
Net Assets $ 27,887,886
Holdings Count | $ / shares 26
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2024)
Net Assets
$27,887,886
Number of Holdings
26
Portfolio Turnover
30%
Holdings [Text Block]
Top Sectors
(%)
Consumer Staples
18.8%
Information Technology
17.6%
Consumer Discretionary
13.8%
Financials
12.8%
Communication Services
11.6%
Health Care
10.8%
Utilities
4.0%
Real Estate
2.8%
Industrials
2.5%
Cash & Other
5.3%
Top Issuers
(%)
Microsoft Corp.
7.2%
Nestle SA
6.9%
Amazon.com, Inc.
5.9%
Alphabet, Inc.
5.6%
Mastercard, Inc.
4.8%
Taiwan Semiconductor Manufacturing Co. Ltd.
4.4%
Reckitt Benckiser Group PLC
4.0%
UnitedHealth Group, Inc.
4.0%
Dollar General Corp.
4.0%
SAP SE
3.9%
Top Countries
(%)
United States
59.7%
Switzerland
10.8%
United Kingdom
6.0%
Taiwan, Province of China
4.5%
Netherlands
4.3%
Germany
3.9%
Hong Kong
3.0%
Spain
2.5%
Cash & Other
5.3%
Updated Prospectus Web Address https://frontiermutualfunds.com/resources/
Service Class  
Shareholder Report [Line Items]  
Fund Name Frontier MFG Global Sustainable Fund
Class Name Service Class
Trading Symbol FMSRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Frontier MFG Global Sustainable Fund for the period of July 1, 2024, to December 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at   https://frontiermutualfunds.com/resources/. You can also request this information by contacting us at 888-825-2100.
Additional Information Phone Number 888-825-2100
Additional Information Website https://frontiermutualfunds.com/resources/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$47
0.90%
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.90%
Net Assets $ 27,887,886
Holdings Count | $ / shares 26
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2024)
Net Assets
$27,887,886
Number of Holdings
26
Portfolio Turnover
30%
Holdings [Text Block]
Top Sectors
(%)
Consumer Staples
18.8%
Information Technology
17.6%
Consumer Discretionary
13.8%
Financials
12.8%
Communication Services
11.6%
Health Care
10.8%
Utilities
4.0%
Real Estate
2.8%
Industrials
2.5%
Cash & Other
5.3%
Top Issuers
(%)
Microsoft Corp.
7.2%
Nestle SA
6.9%
Amazon.com, Inc.
5.9%
Alphabet, Inc.
5.6%
Mastercard, Inc.
4.8%
Taiwan Semiconductor Manufacturing Co. Ltd.
4.4%
Reckitt Benckiser Group PLC
4.0%
UnitedHealth Group, Inc.
4.0%
Dollar General Corp.
4.0%
SAP SE
3.9%
Top Countries
(%)
United States
59.7%
Switzerland
10.8%
United Kingdom
6.0%
Taiwan, Province of China
4.5%
Netherlands
4.3%
Germany
3.9%
Hong Kong
3.0%
Spain
2.5%
Cash & Other
5.3%
Updated Prospectus Web Address https://frontiermutualfunds.com/resources/
Institutional Class  
Shareholder Report [Line Items]  
Fund Name Frontier MFG Core Infrastructure Fund
Class Name Institutional Class
Trading Symbol FMGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Frontier MFG Core Infrastructure Fund for the period of July 1, 2024, to December 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at   https://frontiermutualfunds.com/resources/. You can also request this information by contacting us at 888-825-2100.
Additional Information Phone Number 888-825-2100
Additional Information Website https://frontiermutualfunds.com/resources/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Institutional Class
$26
0.50%
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.50%
Net Assets $ 145,840,121
Holdings Count | $ / shares 92
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2024)
Net Assets
$145,840,121
Number of Holdings
92
Portfolio Turnover
5%
Holdings [Text Block]
Top Sectors
(%)
Integrated Power
28.2%
Transmission and Distribution
19.3%
Toll Roads
11.8%
Airports
10.0%
Energy Infrastructure
8.3%
Communications
7.7%
Gas Utilities
7.1%
Water Utilities
5.6%
Social
0.9%
Cash & Other
1.1%
Top Issuers
(%)
National Grid PLC
3.1%
Enbridge, Inc.
3.1%
Vinci SA
3.1%
Transurban Group
3.1%
Ferrovial SE
3.0%
TC Energy Corp.
3.0%
Aena SME SA
3.0%
Cellnex Telecom SA
2.9%
Fortis, Inc.
2.7%
Hydro One Ltd.
2.4%
Top Countries
(%)
United States
40.2%
Canada
15.0%
Spain
10.6%
United Kingdom
6.8%
France
5.7%
Italy
5.6%
Australia
4.4%
Mexico
2.8%
Hong Kong
1.9%
Cash & Other
7.0%
Updated Prospectus Web Address https://frontiermutualfunds.com/resources/
Service Class  
Shareholder Report [Line Items]  
Fund Name Frontier MFG Core Infrastructure Fund
Class Name Service Class
Trading Symbol FCIVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Frontier MFG Core Infrastructure Fund for the period of July 1, 2024, to December 31, 2024.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at   https://frontiermutualfunds.com/resources/. You can also request this information by contacting us at 888-825-2100.
Additional Information Phone Number 888-825-2100
Additional Information Website https://frontiermutualfunds.com/resources/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Service Class
$31
0.60%
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.60%
Net Assets $ 145,840,121
Holdings Count | $ / shares 92
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2024)
Net Assets
$145,840,121
Number of Holdings
92
Portfolio Turnover
5%
Holdings [Text Block]
Top Sectors
(%)
Integrated Power
28.2%
Transmission and Distribution
19.3%
Toll Roads
11.8%
Airports
10.0%
Energy Infrastructure
8.3%
Communications
7.7%
Gas Utilities
7.1%
Water Utilities
5.6%
Social
0.9%
Cash & Other
1.1%
Top Issuers
(%)
National Grid PLC
3.1%
Enbridge, Inc.
3.1%
Vinci SA
3.1%
Transurban Group
3.1%
Ferrovial SE
3.0%
TC Energy Corp.
3.0%
Aena SME SA
3.0%
Cellnex Telecom SA
2.9%
Fortis, Inc.
2.7%
Hydro One Ltd.
2.4%
Top Countries
(%)
United States
40.2%
Canada
15.0%
Spain
10.6%
United Kingdom
6.8%
France
5.7%
Italy
5.6%
Australia
4.4%
Mexico
2.8%
Hong Kong
1.9%
Cash & Other
7.0%
Updated Prospectus Web Address https://frontiermutualfunds.com/resources/