Frontier Funds 10-Q 15 Nov 21 2021 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 10, 2021
Document Information Line Items
Entity Registrant Name	FRONTIER FUNDS
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		0
Amendment Flag	false
Entity Central Index Key	0001261379
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	000-51274
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-6815533
Entity Address, Address Line One	25568 Genesee Trail Road
Entity Address, City or Town	Golden
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80401
City Area Code	(303)
Local Phone Number	454-5500
Entity Interactive Data Current	Yes

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Frontier Funds [Member]
ASSETS
Cash and cash equivalents	$ 183,390	$ 468,466
U.S. Treasury securities, at fair value	143,896	2,282,606
Open trade equity, at fair value	84,329	100,440
Receivable from futures commission merchants	788,667	233,973
Investments in private investment companies, at fair value	22,075,333	23,089,312
Interest receivable	1,022	45,578
Receivable from related parties	38,202	26,129
Redemptions receivable from private investment companies		181,323
Total Assets	23,314,839	26,427,827
LIABILITIES
Incentive fees payable to Managing Owner	54,924
Management fees payable to Managing Owner	1,610	8,854
Risk analysis fees payable	10,470	9,513
Payables to related parties	38,202	26,129
LIABILITIES
Redemptions payable	50,041	38,128
Interest payable to Managing Owner	1,978	2,107
Service fees payable to Managing Owner	32,805	36,705
Trading fees payable to Managing Owner	75,283	81,698
Subscriptions in advance for service fee rebates	665,217	638,962
Other liabilities	17,555	16,592
Total Liabilities	948,085	858,688
CAPITAL
Managing Owner Units	237,234	283,217
Limited Owner Units	22,129,520	25,285,922
Total Owners’ Capital	22,366,754	25,569,139
Total Capital	22,366,754	25,569,139
Total Liabilities and Capital	23,314,839	26,427,827
Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents	42,657	87,715
U.S. Treasury securities, at fair value	33,471	427,393
Investments in private investment companies, at fair value	3,061,135	3,644,603
Investments in unconsolidated trading companies, at fair value	30,579	16,669
Interest receivable	238	8,534
Receivable from related parties	8,886	4,892
Redemptions receivable from private investment companies		31,886
Total Assets	3,176,966	4,221,692
LIABILITIES
Redemptions payable
Interest payable to Managing Owner
Service fees payable to Managing Owner	85	385
Trading fees payable to Managing Owner	9,894	12,576
Subscriptions in advance for service fee rebates	22,650	22,650
Other liabilities	3,668	3,110
Total Liabilities	36,297	38,721
CAPITAL
Total Owners’ Capital	3,140,669	4,182,971
Non-Controlling Interests
Total Capital	3,140,669	4,182,971
Total Liabilities and Capital	3,176,966	4,221,692
Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents	22,653	4,771
U.S. Treasury securities, at fair value	17,774	23,245
Investments in private investment companies, at fair value	782,240	1,014,591
Investments in unconsolidated trading companies, at fair value	16,239	907
Interest receivable	126	464
Receivable from related parties	4,719	266
Redemptions receivable from private investment companies		24,837
Total Assets	843,751	1,069,081
LIABILITIES
Redemptions payable		38,128
Interest payable to Managing Owner
Service fees payable to Managing Owner	44	70
Trading fees payable to Managing Owner	4,220	5,460
Subscriptions in advance for service fee rebates	31,725	31,725
Other liabilities	1,948	171
Total Liabilities	37,937	75,554
CAPITAL
Total Owners’ Capital	805,814	993,527
Non-Controlling Interests
Total Capital	805,814	993,527
Total Liabilities and Capital	843,751	1,069,081
Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents	29,728	93,327
U.S. Treasury securities, at fair value	23,326	454,738
Investments in private investment companies, at fair value	1,335,596	738,053
Investments in unconsolidated trading companies, at fair value	21,311	17,736
Interest receivable	166	9,080
Receivable from related parties	6,193	5,205
Redemptions receivable from private investment companies		1,251
Total Assets	1,416,320	1,319,390
LIABILITIES
Redemptions payable
Interest payable to Managing Owner	37	87
Service fees payable to Managing Owner	19	18
Trading fees payable to Managing Owner	3,295	2,281
Subscriptions in advance for service fee rebates	393	393
Other liabilities	2,557	3,308
Total Liabilities	6,301	6,087
CAPITAL
Total Owners’ Capital	1,410,019	1,313,303
Non-Controlling Interests
Total Capital	1,410,019	1,313,303
Total Liabilities and Capital	1,416,320	1,319,390
Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents		261,803
U.S. Treasury securities, at fair value		1,275,641
Open trade equity, at fair value	84,329	100,440
Receivable from futures commission merchants	788,667	233,973
Investments in private investment companies, at fair value	9,842,164	10,528,252
Investments in unconsolidated trading companies, at fair value		49,755
Interest receivable		25,471
Receivable from related parties		14,602
Redemptions receivable from private investment companies		55,473
Total Assets	10,715,160	12,545,410
LIABILITIES
Incentive fees payable to Managing Owner	54,924
Management fees payable to Managing Owner	1,610	8,854
Risk analysis fees payable	10,470	9,513
Payables to related parties	38,202
LIABILITIES
Redemptions payable	50,041
Interest payable to Managing Owner	1,063	1,376
Service fees payable to Managing Owner	18,384	21,381
Trading fees payable to Managing Owner	35,169	37,894
Subscriptions in advance for service fee rebates	363,825	346,855
Other liabilities	1,780	9,258
Total Liabilities	575,468	435,131
CAPITAL
Total Owners’ Capital	10,139,692	12,110,279
Non-Controlling Interests
Total Capital	10,139,692	12,110,279
Total Liabilities and Capital	10,715,160	12,545,410
Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents	21,764
U.S. Treasury securities, at fair value	17,077
Open trade equity, at fair value
Receivable from futures commission merchants
Investments in private investment companies, at fair value	1,555,606	1,638,665
Investments in unconsolidated trading companies, at fair value	15,601
Interest receivable	121
Receivable from related parties	4,534
Redemptions receivable from private investment companies		67,876
Total Assets	1,614,703	1,706,541
LIABILITIES
Management fees payable to Managing Owner
Risk analysis fees payable
Payables to related parties		26,129
LIABILITIES
Interest payable to Managing Owner	249	179
Service fees payable to Managing Owner	3,698	3,709
Trading fees payable to Managing Owner	4,003	3,933
Subscriptions in advance for service fee rebates	20,766	19,463
Other liabilities	1,872
Total Liabilities	30,588	53,413
CAPITAL
Total Owners’ Capital	1,584,115	1,653,128
Non-Controlling Interests
Total Capital	1,584,115	1,653,128
Total Liabilities and Capital	1,614,703	1,706,541
Frontier Global Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents	25,316	5,694
U.S. Treasury securities, at fair value	19,864	27,742
Investments in private investment companies, at fair value	2,802,754	3,068,656
Investments in unconsolidated trading companies, at fair value	18,148	1,083
Interest receivable	141	554
Receivable from related parties	5,273	319
Total Assets	2,871,496	3,104,048
LIABILITIES
Redemptions payable
Interest payable to Managing Owner	261	326
Service fees payable to Managing Owner	5,525	6,348
Trading fees payable to Managing Owner	10,585	11,849
Subscriptions in advance for service fee rebates	157,782	154,671
Other liabilities	2,178	205
Total Liabilities	176,331	173,399
CAPITAL
Total Owners’ Capital	2,695,165	2,930,649
Non-Controlling Interests
Total Capital	2,695,165	2,930,649
Total Liabilities and Capital	2,871,496	3,104,048
Frontier Heritage Fund [Member] | The Series of Frontier Funds [Member]
ASSETS
Cash and cash equivalents	41,272	15,156
U.S. Treasury securities, at fair value	32,384	73,847
Investments in private investment companies, at fair value	2,564,374	2,367,462
Investments in unconsolidated trading companies, at fair value	29,586	2,880
Interest receivable	230	1,475
Receivable from related parties	8,597	845
Total Assets	2,676,443	2,461,665
LIABILITIES
Redemptions payable
Interest payable to Managing Owner	368	139
Service fees payable to Managing Owner	5,050	4,794
Trading fees payable to Managing Owner	8,117	7,705
Subscriptions in advance for service fee rebates	68,076	63,205
Other liabilities	3,552	540
Total Liabilities	85,163	76,383
CAPITAL
Total Owners’ Capital	2,591,280	2,385,282
Non-Controlling Interests
Total Capital	2,591,280	2,385,282
Total Liabilities and Capital	2,676,443	2,461,665
Class 2 [Member] | Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	8,048	2,212
Limited Owner Units	$ 390,873	$ 464,012
Units Outstanding
Units Outstanding (in Shares)	4,384	5,241
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 90.99	$ 88.95
Class 2 [Member] | Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 4,047	$ 6,265
Limited Owner Units	$ 211,953	$ 257,673
Units Outstanding
Units Outstanding (in Shares)	2,876	3,908
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 75.1	$ 67.54
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 4,539	$ 3,939
Limited Owner Units	$ 27,428	$ 30,334
Units Outstanding
Units Outstanding (in Shares)	323	399
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 99.09	$ 85.99
Class 2 [Member] | Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 50,098	$ 51,810
Limited Owner Units	$ 1,550,494	$ 1,906,359
Units Outstanding
Units Outstanding (in Shares)	11,324	15,000
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 141.34	$ 130.54
Class 2 [Member] | Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 17,177	$ 17,210
Limited Owner Units	$ 59,135	$ 50,769
Units Outstanding
Units Outstanding (in Shares)	689	722
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 110.77	$ 94.2
Class 2 [Member] | Frontier Global Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 29,027	$ 31,366
Limited Owner Units	$ 173,450	$ 157,311
Units Outstanding
Units Outstanding (in Shares)	1,096	1,126
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 184.75	$ 167.56
Class 2 [Member] | Frontier Heritage Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 27,691	$ 24,105
Limited Owner Units	$ 219,179	$ 183,565
Units Outstanding
Units Outstanding (in Shares)	1,326	1,332
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 186.17	$ 155.92
Class 2a [Member] | Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 2a [Member] | Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 9,628	$ 8,274
Limited Owner Units	$ 83,512	$ 76,583
Units Outstanding
Units Outstanding (in Shares)	1,447	1,535
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 64.35	$ 55.29
Class 2a [Member] | Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 57,105	$ 75,416
Limited Owner Units		$ 30,961
Units Outstanding
Units Outstanding (in Shares)	466	940
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 122.65	$ 113.2
Class 2a [Member] | Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 3 [Member] | Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 24,446	$ 54,405
Limited Owner Units	$ 2,717,302	$ 3,508,082
Units Outstanding
Units Outstanding (in Shares)	32,107	42,754
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 85.39	$ 83.33
Class 3 [Member] | Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 4,207	$ 7,167
Limited Owner Units	$ 585,607	$ 712,682
Units Outstanding
Units Outstanding (in Shares)	8,336	11,333
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 70.76	$ 63.52
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units
Limited Owner Units	$ 1,056,949	$ 976,771
Units Outstanding
Units Outstanding (in Shares)	10,168	10,828
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 103.95	$ 90.21
Class 3a [Member] | Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 3a [Member] | Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Managing Owner Units	$ 1,221	$ 1,048
Limited Owner Units	$ 226,742	$ 216,354
Units Outstanding
Units Outstanding (in Shares)	3,350	3,725
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 68.04	$ 58.37
Class 3a [Member] | Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 481,733	$ 507,148
Units Outstanding
Units Outstanding (in Shares)	3,941	4,495
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 122.23	$ 112.81
Class 3a [Member] | Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 1 [Member] | Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units		$ 154,260
Units Outstanding
Units Outstanding (in Shares)		2,122
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)		$ 72.68
Class 1 [Member] | Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units		$ 9,740
Units Outstanding
Units Outstanding (in Shares)		177
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)		$ 55.18
Class 1 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 1 [Member] | Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 7,933,315	$ 9,430,532
Units Outstanding
Units Outstanding (in Shares)	93,754	117,991
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 84.62	$ 79.93
Class 1 [Member] | Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 1,496,992	$ 1,575,328
Units Outstanding
Units Outstanding (in Shares)	22,238	26,906
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 67.32	$ 58.55
Class 1 [Member] | Frontier Global Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 2,492,688	$ 2,741,972
Units Outstanding
Units Outstanding (in Shares)	20,849	24,725
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 119.56	$ 110.9
Class 1 [Member] | Frontier Heritage Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 2,335,536	$ 2,169,152
Units Outstanding
Units Outstanding (in Shares)	20,816	22,572
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 112.2	$ 96.1
Class 1AP [Member] | Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
Units Outstanding
Units Outstanding (in Shares)
Class 1AP [Member] | Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
Units Outstanding
Units Outstanding (in Shares)
Class 1AP [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
Units Outstanding
Units Outstanding (in Shares)
Class 1AP [Member] | Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 66,947	$ 108,053
Units Outstanding
Units Outstanding (in Shares)	639	1,116
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 104.82	$ 96.81
Class 1AP [Member] | Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 10,811	$ 9,821
Units Outstanding
Units Outstanding (in Shares)	130	138
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 83.47	$ 70.99
Class 1AP [Member] | Frontier Global Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units
Units Outstanding
Units Outstanding (in Shares)
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)
Class 1AP [Member] | Frontier Heritage Fund [Member] | The Series of Frontier Funds [Member]
CAPITAL
Limited Owner Units	$ 8,874	$ 8,460
Units Outstanding
Units Outstanding (in Shares)	64	73
Net Asset Value per Unit
Net Asset Value per Unit (in Dollars per share)	$ 139.1	$ 116.5

Statements of Operations (Unaud

Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Frontier Funds [Member]
Investment income:
Interest - net	$ 2,520	$ 2,941	$ 8,437	$ 12,721
Total Income/(loss)	2,520	2,941	8,437	12,721
Expenses:
Incentive Fees (rebate)	54,924		104,764
Management Fees	4,764	5,029	13,978	14,753
Service Fees - Class 1	110,307	128,178	342,856	483,402
Risk analysis Fees	1,429	1,509	4,193	4,426
Due Diligence Fees	1,347	2,268	4,392	9,111
Trading Fees	231,958	285,835	716,291	1,057,985
Total Expenses	404,729	422,864	1,186,474	1,569,760
Investment (loss) - net	(402,209)	(419,923)	(1,178,037)	(1,557,039)
Other Fees		45		83
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	93,883	167,553	574,605	588,112
Net unrealized gain/(loss) on private investment companies	(66,860)	(2,356,309)	1,868,317	(626,550)
Net realized gain/(loss) on private investment companies	109,705	11,991	793,346	(3,962,286)
Net change in open trade equity/(deficit)	153,295	(53,834)	(16,668)	(130,869)
Net realized gain/(loss) on swap contracts		(10,318)		(200,052)
Net unrealized gain/(loss) on swap contracts		(248,865)		(7,490,322)
Net realized gain/(loss) on U.S. Treasury securities	(13,512)	(1,058)	(23,832)	44,673
Net unrealized gain/(loss) on U.S. Treasury securities	8,702	(1,105)	(1,798)	3,476
Trading commissions	(4,164)	(5,477)	(10,529)	(17,535)
Net gain/(loss) on investments	281,048	(2,497,422)	3,183,440	(11,791,353)
NET INCREASE/(DECREASE) IN OWNERS’ CAPITAL RESULTING FROM OPERATIONS	(121,161)	(2,917,345)	2,005,403	(13,348,392)
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net			2,429	2,329
Total Income/(loss)			2,429	2,329
Expenses:
Service Fees - Class 1			492	1,501
Due Diligence Fees			790	1,641
Trading Fees			40,507	83,524
Total Expenses			41,789	86,666
Investment (loss) - net			(39,360)	(84,337)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies			124,384	280,814
Net realized gain/(loss) on private investment companies			1,561	(696,820)
Net realized gain/(loss) on U.S. Treasury securities			(2,145)	6,092
Net unrealized gain/(loss) on U.S. Treasury securities			(96)	(2,674)
Change in fair value of investments in unconsolidated trading companies			12,123	(6,972)
Net gain/(loss) on investments			135,827	(419,560)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			96,467	(503,897)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			96,467	(503,897)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net			2,931	2,025
Total Income/(loss)			2,931	2,025
Expenses:
Service Fees - Class 1			170	330
Due Diligence Fees			285	275
Trading Fees			28,870	25,089
Total Expenses			29,325	25,694
Investment (loss) - net			(26,394)	(23,669)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies			195,759	206,081
Net realized gain/(loss) on private investment companies			21,756	(394,032)
Net unrealized gain/(loss) on swap contracts				215,753
Net realized gain/(loss) on U.S. Treasury securities			(3,513)	6,224
Net unrealized gain/(loss) on U.S. Treasury securities			131	(1,476)
Change in fair value of investments in unconsolidated trading companies			13,296	(9,851)
Net gain/(loss) on investments			227,429	22,699
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			201,035	(970)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			201,035	(970)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net			245	6,361
Total Income/(loss)			245	6,361
Expenses:
Incentive Fees (rebate)			104,764
Management Fees			13,978	14,753
Service Fees - Class 1			195,972	284,736
Risk analysis Fees			4,193	4,426
Trading Fees			332,131	465,170
Total Expenses			651,038	769,168
Investment (loss) - net			(650,793)	(762,807)
Other Fees				83
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options			574,605	588,112
Net unrealized gain/(loss) on private investment companies			570,451	(325,724)
Net realized gain/(loss) on private investment companies			304,097	(1,666,467)
Net change in open trade equity/(deficit)			(16,668)	(130,869)
Net unrealized gain/(loss) on swap contracts				(5,804,030)
Net realized gain/(loss) on U.S. Treasury securities			(6,663)	28,151
Net unrealized gain/(loss) on U.S. Treasury securities			(1,089)	(5,409)
Trading commissions			(10,529)	(17,535)
Change in fair value of investments in unconsolidated trading companies			(28,390)	(31,836)
Net gain/(loss) on investments			1,385,814	(7,365,607)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			735,021	(8,128,414)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			735,021	(8,128,414)
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
Expenses:
Service Fees - Class 1			35,191	51,117
Trading Fees			35,541	42,791
Total Expenses			70,732	93,908
Investment (loss) - net			(70,732)	(93,908)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies			152,712	(49,653)
Net realized gain/(loss) on private investment companies			145,302	(285,836)
Net realized gain/(loss) on swap contracts				(102,307)
Net realized gain/(loss) on U.S. Treasury securities			(2,430)	3,374
Net unrealized gain/(loss) on U.S. Treasury securities			385	(3,372)
Change in fair value of investments in unconsolidated trading companies			9,001	87,721
Net gain/(loss) on investments			304,970	(350,073)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			234,238	(443,981)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			234,238	(443,981)
Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
Expenses:
Service Fees - Class 1			58,383	81,204
Trading Fees			106,684	150,154
Total Expenses			165,067	231,358
Investment (loss) - net			(165,067)	(231,358)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies			216,899	(970,042)
Net realized gain/(loss) on private investment companies			150,153	448,127
Net realized gain/(loss) on U.S. Treasury securities			(2,920)	11,338
Net unrealized gain/(loss) on U.S. Treasury securities			(531)	(3,645)
Change in fair value of investments in unconsolidated trading companies			16,611	(10,687)
Net gain/(loss) on investments			380,212	(524,909)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			215,145	(756,267)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			215,145	(756,267)
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
Expenses:
Service Fees - Class 1			50,788	51,802
Trading Fees			75,071	83,036
Total Expenses			125,859	134,838
Investment (loss) - net			(125,859)	(134,838)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies			418,547	(75,695)
Net realized gain/(loss) on private investment companies			86,630	(56,727)
Net realized gain/(loss) on swap contracts				(97,745)
Net unrealized gain/(loss) on swap contracts				197,829
Net realized gain/(loss) on U.S. Treasury securities			(3,082)	9,015
Net unrealized gain/(loss) on U.S. Treasury securities			(178)	(7,369)
Change in fair value of investments in unconsolidated trading companies			14,708	(7,250)
Net gain/(loss) on investments			516,625	(37,942)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			390,766	(172,780)
Less: Operations attributable to non-controlling interests				(95,914)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			390,766	(268,694)
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	1,208	1,143
Total Income/(loss)	1,208	1,143
Expenses:
Service Fees - Class 1	310	2,062
Due Diligence Fees	1,008	1,740
Trading Fees	29,513	50,536
Total Expenses	30,831	54,338
Investment (loss) - net	(29,623)	(53,195)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	(140,588)	(397,041)
Net realized gain/(loss) on private investment companies	2,163	(51,059)
Net unrealized gain/(loss) on swap contracts		(75,700)
Net realized gain/(loss) on U.S. Treasury securities	(1,761)	509
Net unrealized gain/(loss) on U.S. Treasury securities	1,246	80
Change in fair value of investments in unconsolidated trading companies	66	(1,015)
Net gain/(loss) on investments	(138,874)	(524,226)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(168,497)	(577,421)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	(168,497)	(577,421)
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	597	851
Total Income/(loss)	597	851
Expenses:
Service Fees - Class 1	135	407
Due Diligence Fees	241	438
Trading Fees	12,339	21,879
Total Expenses	12,715	22,724
Investment (loss) - net	(12,118)	(21,873)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	42,074	(226,881)
Net realized gain/(loss) on private investment companies	(12,631)	14,487
Net realized gain/(loss) on U.S. Treasury securities	(906)	(269)
Net unrealized gain/(loss) on U.S. Treasury securities	534	(76)
Change in fair value of investments in unconsolidated trading companies	322	(934)
Net gain/(loss) on investments	29,393	(213,673)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	17,275	(235,546)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	17,275	(235,546)
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	628	906
Total Income/(loss)	628	906
Expenses:
Service Fees - Class 1	58	108
Due Diligence Fees	98	90
Trading Fees	10,055	7,777
Total Expenses	10,211	7,975
Investment (loss) - net	(9,583)	(7,069)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	20,671	29,022
Net realized gain/(loss) on private investment companies	(1,340)	(44,189)
Net unrealized gain/(loss) on swap contracts		(4,244)
Net realized gain/(loss) on U.S. Treasury securities	(1,169)	(994)
Net unrealized gain/(loss) on U.S. Treasury securities	774	25
Change in fair value of investments in unconsolidated trading companies	388	(1,058)
Net gain/(loss) on investments	19,324	(21,438)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	9,741	(28,507)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	9,741	(28,507)
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net	87	41
Total Income/(loss)	87	41
Expenses:
Incentive Fees (rebate)	54,924
Management Fees	4,764	5,029
Service Fees - Class 1	62,976	73,754
Risk analysis Fees	1,429	1,509
Trading Fees	108,142	127,677
Total Expenses	232,235	208,014
Investment (loss) - net	(232,148)	(207,973)
Other Fees		45
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	93,883	167,553
Net unrealized gain/(loss) on private investment companies	(184,050)	(961,993)
Net realized gain/(loss) on private investment companies	54,931	139,086
Net change in open trade equity/(deficit)	153,295	(53,834)
Net realized gain/(loss) on swap contracts		(168,921)
Net unrealized gain/(loss) on swap contracts	(6,033)	2,036
Net unrealized gain/(loss) on U.S. Treasury securities	4,214	(384)
Trading commissions	(4,164)	(5,477)
Change in fair value of investments in unconsolidated trading companies	(6,073)	(1,283)
Net gain/(loss) on investments	106,003	(883,217)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(126,145)	(1,091,190)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	(126,145)	(1,091,190)
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net
Total Income/(loss)
Expenses:
Incentive Fees (rebate)
Management Fees
Service Fees - Class 1	11,949	13,025
Trading Fees	12,176	10,391
Total Expenses	24,125	23,416
Investment (loss) - net	(24,125)	(23,416)
Other Fees
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	51,089	(193,003)
Net realized gain/(loss) on private investment companies	2,569	(3,202)
Net unrealized gain/(loss) on swap contracts	(1,088)	(374)
Net unrealized gain/(loss) on U.S. Treasury securities	707	(417)
Change in fair value of investments in unconsolidated trading companies	312	(728)
Net gain/(loss) on investments	53,589	(197,724)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	29,464	(221,140)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	29,464	(221,140)
Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net
Total Income/(loss)
Expenses:
Service Fees - Class 1	17,993	22,977
Trading Fees	34,334	42,481
Total Expenses	52,327	65,458
Investment (loss) - net	(52,327)	(65,458)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	72,902	(465,994)
Net realized gain/(loss) on private investment companies	26,154	30,501
Net realized gain/(loss) on U.S. Treasury securities	(1,041)	(1,194)
Net unrealized gain/(loss) on U.S. Treasury securities	422	69
Change in fair value of investments in unconsolidated trading companies	1,448	(1,415)
Net gain/(loss) on investments	99,885	(438,033)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	47,558	(503,491)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	47,558	(503,491)
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net
Total Income/(loss)
Expenses:
Service Fees - Class 1	16,886	15,845
Trading Fees	25,399	25,094
Total Expenses	42,285	40,939
Investment (loss) - net	(42,285)	(40,939)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies	78,399	(150,921)
Net realized gain/(loss) on private investment companies	32,348	(55,592)
Net realized gain/(loss) on U.S. Treasury securities	(1,514)	(772)
Net unrealized gain/(loss) on U.S. Treasury securities	805	(402)
Change in fair value of investments in unconsolidated trading companies	1,690	(1,106)
Net gain/(loss) on investments	111,728	(208,793)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	69,443	(249,732)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 69,443	$ (249,732)
Frontier Funds [Member] | The Series of the Frontier Funds [Member]
Investment income:
Interest - net			2,832	2,006
Total Income/(loss)			2,832	2,006
Expenses:
Service Fees - Class 1			1,860	12,712
Due Diligence Fees			3,317	7,195
Trading Fees			97,487	208,221
Total Expenses			102,664	228,128
Investment (loss) - net			(99,832)	(226,122)
Realized and unrealized gain/(loss) on investments:
Net unrealized gain/(loss) on private investment companies			163,133	372,285
Net realized gain/(loss) on private investment companies			67,391	(1,295,055)
Net unrealized gain/(loss) on swap contracts				(2,099,874)
Net realized gain/(loss) on U.S. Treasury securities			(3,079)	(19,521)
Net unrealized gain/(loss) on U.S. Treasury securities			(420)	27,421
Change in fair value of investments in unconsolidated trading companies			5,538	(5,303)
Net gain/(loss) on investments			232,563	(3,020,047)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS			132,731	(3,246,169)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS			$ 132,731	$ (3,246,169)
Class 1 [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)			$ (55.18)	$ (20.13)
Class 1 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)
Class 1 [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)			4.69	(45.41)
Class 1 [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)			8.77	(13.21)
Class 1 [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)			8.66	(27.34)
Class 1 [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)			16.1	(10.65)
Class 1 [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)	$ (1.78)	$ (7.61)
Class 1 [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)		(9.77)
Class 1 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)
Class 1 [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)	(1.24)	(6.77)
Class 1 [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)	1.15	(7.69)
Class 1 [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)	2.28	(17.5)
Class 1 [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)	2.94	(9.63)
Class 1 [Member] | Frontier Funds [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1 (in Dollars per share)			3.68	(34.62)
Class 1AP [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)
Class 1AP [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)				(44.2)
Class 1AP [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)			8.01	(51.47)
Class 1AP [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)			12.48	(14.31)
Class 1AP [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)				(29.04)
Class 1AP [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)			22.6	(9.62)
Class 1AP [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)
Class 1AP [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)
Class 1AP [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)		(44.58)
Class 1AP [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)	(0.73)	(7.42)
Class 1AP [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)	2.03	(8.7)
Class 1AP [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)		(19.96)
Class 1AP [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)	4.66	(10.72)
Class 1AP [Member] | Frontier Funds [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 1AP (in Dollars per share)
Class 2 [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			7.56	(23.63)
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			13.1	(0.19)
Class 2 [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			10.8	(69.4)
Class 2 [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			16.57	(18.74)
Class 2 [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			17.19	(36.6)
Class 2 [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			30.25	(13.69)
Class 2 [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	(4.91)	(8.88)
Class 2 [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	1.58	(11.58)
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	0.6	(1.86)
Class 2 [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	(1)	(10.02)
Class 2 [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	2.7	(11.55)
Class 2 [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	4.9	(24.87)
Class 2 [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)	6.24	(14.34)
Class 2 [Member] | Frontier Funds [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2 (in Dollars per share)			2.04	(40.58)
Class 2a [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)			9.06	(0.17)
Class 2a [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)			9.45	(60.14)
Class 2a [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)
Class 2a [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)
Class 2a [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)	0.62	(1.11)
Class 2a [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)	(0.82)	(8.71)
Class 2a [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)
Class 2a [Member] | Frontier Funds [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 2a (in Dollars per share)
Class 3 [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3 (in Dollars per share)			7.24	(22.05)
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3 (in Dollars per share)			13.74	(0.24)
Class 3 [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3 (in Dollars per share)	(4.56)	(8.26)
Class 3 [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3 (in Dollars per share)	1.53	(10.83)
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3 (in Dollars per share)	0.63	(1.95)
Class 3 [Member] | Frontier Funds [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3 (in Dollars per share)			2.06	(37.78)
Class 3a [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)			9.67	0.05
Class 3a [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)			9.42	(59.9)
Class 3a [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)
Class 3a [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)
Class 3a [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)	0.68	(1.12)
Class 3a [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)	(0.82)	(8.64)
Class 3a [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)
Class 3a [Member] | Frontier Funds [Member] | The Series of the Frontier Funds [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
Class 3a (in Dollars per share)

Statements of Changes in Owners

Statements of Changes in Owners’ Capital (Unaudited) - USD ($)		3 Months Ended	9 Months Ended
		Sep. 30, 2021	Sep. 30, 2021
Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 23,382,228	$ 25,569,139
Owners’ Capital, Ending balance		22,366,754	22,366,754
Payment made by Related Party
Payment made by Managing Owner
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (121,161)	$ 2,005,403
Sale of Units (including transfers) (in Shares)		7,000	7,000
Redemption of Units (including transfers) (in Shares)		(901,313)	(5,214,788)
Limited Owners [Member] | Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 23,140,723	$ 25,285,922
Owners’ Capital, Ending balance		22,129,520	22,129,520
Payment made by Related Party
Payment made by Managing Owner
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (120,890)	$ 1,982,086
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)		(890,313)	(5,138,488)
Managing Owner [Member] | Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 241,505	$ 283,217
Owners’ Capital, Ending balance		237,234	237,234
Payment made by Related Party
Payment made by Managing Owner
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (271)	$ 23,317
Sale of Units (including transfers) (in Shares)		7,000	7,000
Redemption of Units (including transfers) (in Shares)		(11,000)	(76,300)
Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 3,408,767	$ 4,182,971
Owners’ Capital, Ending balance		3,140,669	3,140,669
Sale of Units		6,000	6,000
Redemption of Units		(105,601)	(1,181,033)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		(168,497)	132,731
Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		807,738	993,527
Owners’ Capital, Ending balance		805,814	805,814
Sale of Units		1,000	1,000
Redemption of Units		(20,199)	(285,180)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		17,275	96,467
Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		1,412,443	1,313,303
Owners’ Capital, Ending balance		1,410,019	1,410,019
Redemption of Units		(12,165)	(104,319)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		9,741	201,035
Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		10,804,759	12,110,279
Owners’ Capital, Ending balance		10,139,692	10,139,692
Redemption of Units		(538,922)	(2,705,608)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		(126,145)	735,021
Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		1,621,807	1,653,128
Owners’ Capital, Ending balance		1,584,115	1,584,115
Redemption of Units		(67,156)	(303,251)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		29,464	234,238
Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		2,781,113	2,930,649
Owners’ Capital, Ending balance		2,695,165	2,695,165
Redemption of Units		(133,506)	(450,629)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		47,558	215,145
Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		2,545,601	2,385,282
Owners’ Capital, Ending balance		2,591,280	2,591,280
Redemption of Units		(23,764)	(184,768)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		69,443	390,766
Class 1 [Member] | Frontier Diversified Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		40,171	154,260
Owners’ Capital, Ending balance
Owners' Capital - Units, Beginning balance		517	2,122
Owners’ Capital - Units, Ending balance
Sale of Units
Redemption of Units		(39,485)	(161,099)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (686)	$ 6,839
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)		(517)	(2,122)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 77.68	$ 72.68
Change in net asset value per unit (in Dollars per share)		(77.68)	(72.68)
Net asset value per unit, Ending balance (in Dollars per share)	[1]
Class 1 [Member] | Frontier Masters Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance			$ 9,740
Owners’ Capital, Ending balance
Owners' Capital - Units, Beginning balance			177
Owners’ Capital - Units, Ending balance
Sale of Units
Redemption of Units
Transfer of Units In(Out)			(10,187)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests			$ 447
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)			(177)
Net asset value per unit, Beginning balance (in Dollars per share)			$ 55.18
Change in net asset value per unit (in Dollars per share)			(55.18)
Net asset value per unit, Ending balance (in Dollars per share)	[1]
Class 1 [Member] | Frontier Balanced Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 8,386,018	$ 9,430,532
Owners’ Capital, Ending balance		7,933,315	7,933,315
Owners' Capital - Units, Beginning balance		97,671	117,991
Owners’ Capital - Units, Ending balance		93,754	93,754
Redemption of Units		(337,506)	(2,028,537)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (115,197)	$ 531,320
Redemption of Units (including transfers) (in Shares)		(3,917)	(24,237)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 85.86	$ 79.93
Change in net asset value per unit (in Dollars per share)		(1.24)	4.69
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 84.62	$ 84.62
Class 1 [Member] | Frontier Select Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 1,535,828	$ 1,575,328
Owners’ Capital, Ending balance		1,496,992	1,496,992
Owners' Capital - Units, Beginning balance		23,209	26,906
Owners’ Capital - Units, Ending balance		22,238	22,238
Redemption of Units		(66,156)	(299,314)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 27,320	$ 220,978
Redemption of Units (including transfers) (in Shares)		(971)	(4,668)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 66.17	$ 58.55
Change in net asset value per unit (in Dollars per share)		1.15	8.77
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 67.32	$ 67.32
Class 1 [Member] | Frontier Global Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 2,580,738	$ 2,741,972
Owners’ Capital, Ending balance		2,492,688	2,492,688
Owners' Capital - Units, Beginning balance		22,006	24,725
Owners’ Capital - Units, Ending balance		20,849	20,849
Redemption of Units		(130,506)	(445,629)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 42,456	$ 196,345
Redemption of Units (including transfers) (in Shares)		(1,157)	(3,876)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 117.28	$ 110.9
Change in net asset value per unit (in Dollars per share)		2.28	8.66
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 119.56	$ 119.56
Class 1 [Member] | Frontier Heritage Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 2,297,366	$ 2,169,152
Owners’ Capital, Ending balance		2,335,536	2,335,536
Owners' Capital - Units, Beginning balance		21,026	22,572
Owners’ Capital - Units, Ending balance		20,816	20,816
Redemption of Units		(22,764)	(182,668)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 60,934	$ 349,052
Redemption of Units (including transfers) (in Shares)		(210)	(1,756)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 109.26	$ 96.1
Change in net asset value per unit (in Dollars per share)		2.94	16.1
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 112.2	$ 112.2
Class 2 [Member] | Frontier Diversified Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 428,426	$ 464,012
Owners’ Capital, Ending balance		390,873	390,873
Owners' Capital - Units, Beginning balance		4,467	5,216
Owners’ Capital - Units, Ending balance		4,295	4,295
Sale of Units		6,000
Redemption of Units		(16,316)	(82,184)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (27,237)	$ 9,045
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)		(172)	(921)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 95.9	$ 88.95
Change in net asset value per unit (in Dollars per share)		(4.91)	2.04
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 90.99	$ 90.99
Class 2 [Member] | Frontier Diversified Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 2,384	$ 2,212
Owners’ Capital, Ending balance		8,048	8,048
Owners' Capital - Units, Beginning balance		25	25
Owners’ Capital - Units, Ending balance		89	89
Sale of Units			6,000
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 5,664	$ (164)
Sale of Units (including transfers) (in Shares)		64	64
Redemption of Units (including transfers) (in Shares)
Class 2 [Member] | Frontier Masters Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 220,435	$ 257,673
Owners’ Capital, Ending balance		211,953	211,953
Owners' Capital - Units, Beginning balance		2,998	3,815
Owners’ Capital - Units, Ending balance		2,822	2,822
Sale of Units		1,000
Redemption of Units		(12,849)	(70,949)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 3,367	$ 25,229
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)		(176)	(993)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 73.52	$ 67.54
Change in net asset value per unit (in Dollars per share)		1.58	7.56
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 75.1	$ 75.1
Class 2 [Member] | Frontier Masters Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 2,943	$ 6,265
Owners’ Capital, Ending balance		4,047	4,047
Owners' Capital - Units, Beginning balance		40	93
Owners’ Capital - Units, Ending balance		54	54
Sale of Units			1,000
Redemption of Units			(3,500)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 1,104	$ 282
Sale of Units (including transfers) (in Shares)		14	14
Redemption of Units (including transfers) (in Shares)			(53)
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 34,265	$ 30,334
Owners’ Capital, Ending balance		27,428	27,428
Owners' Capital - Units, Beginning balance		348	353
Owners’ Capital - Units, Ending balance		277	277
Redemption of Units		(6,890)	(7,313)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 53	$ 4,407
Redemption of Units (including transfers) (in Shares)		(71)	(76)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 98.49	$ 85.99
Change in net asset value per unit (in Dollars per share)		0.6	13.1
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 99.09	$ 99.09
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 4,511	$ 3,939
Owners’ Capital, Ending balance		4,539	4,539
Owners' Capital - Units, Beginning balance		46	46
Owners’ Capital - Units, Ending balance		46	46
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 28	$ 600
Redemption of Units (including transfers) (in Shares)
Class 2 [Member] | Frontier Balanced Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 1,644,977	$ 1,906,359
Owners’ Capital, Ending balance		1,550,494	1,550,494
Owners' Capital - Units, Beginning balance		11,557	14,603
Owners’ Capital - Units, Ending balance		10,969	10,969
Redemption of Units		(85,706)	(495,213)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (8,777)	$ 139,348
Redemption of Units (including transfers) (in Shares)		(588)	(3,634)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 142.34	$ 130.54
Change in net asset value per unit (in Dollars per share)		(1)	10.8
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 141.34	$ 141.34
Class 2 [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 56,491	$ 51,810
Owners’ Capital, Ending balance		50,098	50,098
Owners' Capital - Units, Beginning balance		397	397
Owners’ Capital - Units, Ending balance		355	355
Redemption of Units		(6,000)	(6,000)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (393)	$ 4,288
Redemption of Units (including transfers) (in Shares)		(42)	(42)
Class 2 [Member] | Frontier Select Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 57,694	$ 50,769
Owners’ Capital, Ending balance		59,135	59,135
Owners' Capital - Units, Beginning balance		534	539
Owners’ Capital - Units, Ending balance		534	534
Redemption of Units			(481)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 1,441	$ 8,847
Redemption of Units (including transfers) (in Shares)			(5)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 108.07	$ 94.2
Change in net asset value per unit (in Dollars per share)		2.7	16.57
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 110.77	$ 110.77
Class 2 [Member] | Frontier Select Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 17,737	$ 17,210
Owners’ Capital, Ending balance		17,177	17,177
Owners' Capital - Units, Beginning balance		164	183
Owners’ Capital - Units, Ending balance		155	155
Redemption of Units		(1,000)	(2,800)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 440	$ 2,767
Redemption of Units (including transfers) (in Shares)		(9)	(28)
Class 2 [Member] | Frontier Global Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 168,853	$ 157,311
Owners’ Capital, Ending balance		173,450	173,450
Owners' Capital - Units, Beginning balance		939	939
Owners’ Capital - Units, Ending balance		939	939
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 4,597	$ 16,139
Redemption of Units (including transfers) (in Shares)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 179.85	$ 167.56
Change in net asset value per unit (in Dollars per share)		4.9	17.19
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 184.75	$ 184.75
Class 2 [Member] | Frontier Global Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 31,522	$ 31,366
Owners’ Capital, Ending balance		29,027	29,027
Owners' Capital - Units, Beginning balance		175	187
Owners’ Capital - Units, Ending balance		157	157
Redemption of Units		(3,000)	(5,000)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 505	$ 2,661
Redemption of Units (including transfers) (in Shares)		(18)	(30)
Class 2 [Member] | Frontier Heritage Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 211,840	$ 183,565
Owners’ Capital, Ending balance		219,179	219,179
Owners' Capital - Units, Beginning balance		1,177	1,177
Owners’ Capital - Units, Ending balance		1,177	1,177
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 7,339	$ 35,614
Redemption of Units (including transfers) (in Shares)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 179.93	$ 155.92
Change in net asset value per unit (in Dollars per share)		6.24	30.25
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 186.17	$ 186.17
Class 2 [Member] | Frontier Heritage Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 27,818	$ 24,105
Owners’ Capital, Ending balance		27,691	27,691
Owners' Capital - Units, Beginning balance		155	155
Owners’ Capital - Units, Ending balance		149	149
Redemption of Units		(1,000)	(1,000)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 873	$ 4,586
Redemption of Units (including transfers) (in Shares)		(6)	(6)
Class 3 [Member] | Frontier Diversified Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 2,912,036	$ 3,508,082
Owners’ Capital, Ending balance		2,717,302	2,717,302
Owners' Capital - Units, Beginning balance		32,374	42,100
Owners’ Capital - Units, Ending balance		31,820	31,820
Sale of Units
Redemption of Units		(49,800)	(906,750)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (144,934)	$ 115,970
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)		(554)	(10,280)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 89.95	$ 83.33
Change in net asset value per unit (in Dollars per share)		(4.56)	2.06
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 85.39	$ 85.39
Class 3 [Member] | Frontier Diversified Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 25,750	$ 54,405
Owners’ Capital, Ending balance		24,446	24,446
Owners' Capital - Units, Beginning balance		287	654
Owners’ Capital - Units, Ending balance		287	287
Sale of Units
Redemption of Units			(31,000)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (1,304)	$ 1,041
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)			(367)
Class 3 [Member] | Frontier Masters Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 580,243	$ 712,682
Owners’ Capital, Ending balance		585,607	585,607
Owners' Capital - Units, Beginning balance		8,381	11,220
Owners’ Capital - Units, Ending balance		8,276	8,276
Sale of Units
Redemption of Units		(7,350)	(207,231)
Transfer of Units In(Out)			10,187
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 12,714	$ 69,969
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)		(105)	(2,944)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 69.23	$ 63.52
Change in net asset value per unit (in Dollars per share)		1.53	7.24
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 70.76	$ 70.76
Class 3 [Member] | Frontier Masters Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 4,117	$ 7,167
Owners’ Capital, Ending balance		4,207	4,207
Owners' Capital - Units, Beginning balance		60	113
Owners’ Capital - Units, Ending balance		60	60
Sale of Units
Redemption of Units			(3,500)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 90	$ 540
Sale of Units (including transfers) (in Shares)
Redemption of Units (including transfers) (in Shares)			(53)
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 1,050,928	$ 976,771
Owners’ Capital, Ending balance		1,056,949	1,056,949
Owners' Capital - Units, Beginning balance		10,172	10,828
Owners’ Capital - Units, Ending balance		10,168	10,168
Redemption of Units		(415)	(69,099)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 6,436	$ 149,277
Redemption of Units (including transfers) (in Shares)		(4)	(660)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 103.32	$ 90.21
Change in net asset value per unit (in Dollars per share)		0.63	13.74
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 103.95	$ 103.95
Noncontrolling Interest [Member] | Frontier Diversified Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Sale of Units
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Noncontrolling Interest [Member] | Frontier Masters Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Sale of Units
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Noncontrolling Interest [Member] | Frontier Long/Short Commodity Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Noncontrolling Interest [Member] | Frontier Balanced Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Noncontrolling Interest [Member] | Frontier Select Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Noncontrolling Interest [Member] | Frontier Global Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Noncontrolling Interest [Member] | Frontier Heritage Fund [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance
Owners’ Capital, Ending balance
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		82,724	76,583
Owners’ Capital, Ending balance		83,512	83,512
Owners' Capital - Units, Beginning balance		1,298	1,386
Owners’ Capital - Units, Ending balance		1,298	1,298
Redemption of Units			(4,963)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 788	$ 11,892
Redemption of Units (including transfers) (in Shares)			(88)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 63.74	$ 55.29
Change in net asset value per unit (in Dollars per share)		0.61	9.06
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 64.35	$ 64.35
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 9,537	$ 8,274
Owners’ Capital, Ending balance		9,628	9,628
Owners' Capital - Units, Beginning balance		149	149
Owners’ Capital - Units, Ending balance		149	149
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 91	$ 1,354
Redemption of Units (including transfers) (in Shares)
Class 2a [Member] | Frontier Balanced Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 25,378	$ 30,961
Owners’ Capital, Ending balance
Owners' Capital - Units, Beginning balance		206	274
Owners’ Capital - Units, Ending balance		0	0
Redemption of Units		(25,751)	(34,162)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 373	$ 3,201
Redemption of Units (including transfers) (in Shares)		(206)	(274)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 123.47	$ 113.2
Change in net asset value per unit (in Dollars per share)		(0.82)	9.45
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 122.65	$ 122.65
Class 2a [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 57,486	$ 75,416
Owners’ Capital, Ending balance		57,105	57,105
Owners' Capital - Units, Beginning balance		465	666
Owners’ Capital - Units, Ending balance		466	466
Redemption of Units			(23,500)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (381)	$ 5,189
Redemption of Units (including transfers) (in Shares)		1	(200)
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 229,269	$ 216,354
Owners’ Capital, Ending balance		226,742	226,742
Owners' Capital - Units, Beginning balance		3,404	3,707
Owners’ Capital - Units, Ending balance		3,332	3,332
Redemption of Units		(4,860)	(22,944)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 2,333	$ 33,332
Redemption of Units (including transfers) (in Shares)		(72)	(375)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 67.36	$ 58.37
Change in net asset value per unit (in Dollars per share)		0.68	9.67
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 68.04	$ 68.04
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 1,209	$ 1,048
Owners’ Capital, Ending balance		1,221	1,221
Owners' Capital - Units, Beginning balance		18	18
Owners’ Capital - Units, Ending balance		18	18
Redemption of Units
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 12	$ 173
Redemption of Units (including transfers) (in Shares)
Class 3a [Member] | Frontier Balanced Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 517,629	$ 507,148
Owners’ Capital, Ending balance		481,733	481,733
Owners' Capital - Units, Beginning balance		4,207	4,495
Owners’ Capital - Units, Ending balance		3,941	3,941
Redemption of Units		(33,772)	(67,043)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ (2,124)	$ 41,628
Redemption of Units (including transfers) (in Shares)		(266)	(554)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 123.05	$ 112.81
Change in net asset value per unit (in Dollars per share)		(0.82)	9.42
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 122.23	$ 122.23
Class 1AP [Member] | Frontier Balanced Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 116,780	$ 108,053
Owners’ Capital, Ending balance		66,947	66,947
Owners' Capital - Units, Beginning balance		1,106	1,116
Owners’ Capital - Units, Ending balance		639	639
Redemption of Units		(50,187)	(51,153)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 354	$ 10,047
Redemption of Units (including transfers) (in Shares)		(467)	(477)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 105.55	$ 96.81
Change in net asset value per unit (in Dollars per share)		(0.73)	8.01
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 104.82	$ 104.82
Class 1AP [Member] | Frontier Select Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 10,548	$ 9,821
Owners’ Capital, Ending balance		10,811	10,811
Owners' Capital - Units, Beginning balance		130	138
Owners’ Capital - Units, Ending balance		130	130
Redemption of Units			(656)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 263	$ 1,646
Redemption of Units (including transfers) (in Shares)			(8)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 81.44	$ 70.99
Change in net asset value per unit (in Dollars per share)		2.03	12.48
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 83.47	$ 83.47
Class 1AP [Member] | Frontier Heritage Fund [Member] | Limited Owners [Member] | The Series of the Frontier Funds [Member]
Owners' Capital, Beginning balance		$ 8,577	$ 8,460
Owners’ Capital, Ending balance		8,874	8,874
Owners' Capital - Units, Beginning balance		64	73
Owners’ Capital - Units, Ending balance		64	64
Redemption of Units			(1,100)
Transfer of Units In(Out)
Net increase/(decrease) in Owners’ Capital resulting from operations attributable to controlling interests		$ 297	$ 1,514
Redemption of Units (including transfers) (in Shares)			(9)
Net asset value per unit, Beginning balance (in Dollars per share)		$ 134.45	$ 116.5
Change in net asset value per unit (in Dollars per share)		4.65	22.6
Net asset value per unit, Ending balance (in Dollars per share)	[1]	$ 139.1	$ 139.1
[1]	Values are for both the Managing Owner and Limited Owners.

Statements of Cash Flows (Unaud

Statements of Cash Flows (Unaudited) - Series of Frontier Funds [Member] - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	$ 2,005,403	$ (13,348,392)
Change in:
Net change in open trade equity	16,111	175,959
Change in:
Net realized (gain)/loss on swap contracts		97,745
(Purchases) sale of:
Sales of swap contracts		1,491,965
Reduction of collateral in Swap Contracts		1,496,127
Increase and/or decrease in:
Advance on unrealized Swap Appreciation		(1,900,000)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	(8,606)
Net unrealized (gain)/loss on swap contracts		7,490,322
Net unrealized (gain)/loss on private investment companies	(1,868,317)	615,670
Net realized (gain)/loss on private investment companies	(793,346)	3,962,286
Net realized (gain)/loss on U.S. Treasury securities	23,832	(44,673)
Net unrealized (gain)/loss on U.S. Treasury securities	1,798	(3,476)
(Purchases) of swap contracts		(1,447,843)
(Purchases) of U.S. Treasury securities	(1,987,803)	(9,398,221)
Sales of U.S. Treasury securities	4,101,053	9,989,663
U.S. Treasury interest and premium paid/amortized	8,437	12,721
(Purchases) of Private Investment Companies	(4,904,551)	(11,118,853)
Sales of Private Investment Companies	8,580,192	19,488,768
Receivable from futures commission merchants	(554,694)	1,745,358
Interest receivable	44,556	12,660
Receivable from related parties	(12,073)	(164,351)
Incentive fees payable to Managing Owner	54,924
Management fees payable to Managing Owner	(7,244)	108
Other assets		5,700
Redemptions receivable from private investment companies	181,323	70,705
Interest payable to Managing Owner	(129)	1,092
Service fees payable to Managing Owner	(3,900)	(32,413)
Risk analysis fees payable	957	1,564
Payables to related parties	12,073	175,803
Trading fees payable to Managing Owner	(6,415)	(67,963)
Subscriptions in advance for service fee rebates	26,255	32,951
Other liabilities	963	(5,260)
Net cash provided by operating activities	4,910,799	9,335,722
Cash Flows from Financing Activities:
Proceeds from sale of capital	7,000
Payment for redemption of capital	(5,214,788)	(9,374,045)
Redemptions payable	11,913	(79,403)
Cash Flows from Financing Activities:
Net cash provided by (used in) financing activities	(5,195,875)	(9,453,448)
Net increase (decrease) in cash and cash equivalents	(285,076)	(117,726)
Cash and cash equivalents, beginning of period	468,466	367,568
Cash and cash equivalents, end of period	183,390	249,842
Frontier Diversified Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	132,731	(3,246,169)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	142,851	1,348,473
Net unrealized (gain)/loss on swap contracts		2,099,874
Net unrealized (gain)/loss on private investment companies	(163,133)	(372,285)
Net realized (gain)/loss on private investment companies	(67,391)	1,295,055
Net realized (gain)/loss on U.S. Treasury securities	3,079	19,521
Net unrealized (gain)/loss on U.S. Treasury securities	420	(27,421)
(Purchases) of swap contracts		(269,146)
(Purchases) of U.S. Treasury securities	(256,617)	(1,723,974)
Sales of U.S. Treasury securities	501,356	461,162
U.S. Treasury interest and premium paid/amortized	2,832	2,006
(Purchases) of Private Investment Companies	(865,067)	(2,011,773)
Sales of Private Investment Companies	1,679,059	5,931,748
Investments in unconsolidated trading companies, at fair value	(13,910)	9,618
Interest receivable	8,296	1,895
Receivable from related parties	(3,994)	(21,575)
Other assets		5,700
Redemptions receivable from private investment companies	31,886	60,241
Interest payable to Managing Owner
Service fees payable to Managing Owner	(300)	(2,760)
Trading fees payable to Managing Owner	(2,682)	(19,191)
Subscriptions in advance for service fee rebates		119
Other liabilities	558	3,054
Net cash provided by operating activities	1,129,974	3,544,172
Cash Flows from Financing Activities:
Proceeds from sale of units	6,000
Payment for redemption of units	(1,181,033)	(3,553,498)
Change in owner redemptions payable
Net cash provided by (used in) financing activities	(1,175,033)	(3,553,498)
Net increase (decrease) in cash and cash equivalents	(45,058)	(9,326)
Cash and cash equivalents, beginning of period	87,715	56,263
Cash and cash equivalents, end of period	42,657	46,937
Frontier Masters Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	96,467	(503,897)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	(112,616)	(386,057)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on private investment companies	(124,384)	(280,814)
Net realized (gain)/loss on private investment companies	(1,561)	694,341
Net realized (gain)/loss on U.S. Treasury securities	2,145	(6,092)
Net unrealized (gain)/loss on U.S. Treasury securities	96	2,674
(Purchases) of swap contracts
(Purchases) of U.S. Treasury securities	(127,722)	(780,910)
Sales of U.S. Treasury securities	241,139	1,199,617
U.S. Treasury interest and premium paid/amortized	2,429	2,329
(Purchases) of Private Investment Companies	(138,239)	(1,149,732)
Sales of Private Investment Companies	496,535	1,743,952
Investments in unconsolidated trading companies, at fair value	(15,332)	872
Interest receivable	338	832
Receivable from related parties	(4,453)	(23,029)
Other assets
Redemptions receivable from private investment companies	24,837	(44,070)
Interest payable to Managing Owner
Service fees payable to Managing Owner	(26)	(79)
Trading fees payable to Managing Owner	(1,240)	(4,313)
Subscriptions in advance for service fee rebates		184
Other liabilities	1,777	1,630
Net cash provided by operating activities	340,190	467,438
Cash Flows from Financing Activities:
Proceeds from sale of units	1,000
Payment for redemption of units	(285,180)	(460,350)
Change in owner redemptions payable	(38,128)
Net cash provided by (used in) financing activities	(322,308)	(460,350)
Net increase (decrease) in cash and cash equivalents	17,882	7,088
Cash and cash equivalents, beginning of period	4,771	25,639
Cash and cash equivalents, end of period	22,653	32,727
Frontier Long/Short Commodity Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	201,035	(970)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	(78,990)	(286,463)
Net unrealized (gain)/loss on swap contracts		(215,753)
Net unrealized (gain)/loss on private investment companies	(195,759)	(206,081)
Net realized (gain)/loss on private investment companies	(21,756)	394,032
Net realized (gain)/loss on U.S. Treasury securities	3,513	(6,224)
Net unrealized (gain)/loss on U.S. Treasury securities	(131)	1,476
(Purchases) of swap contracts
(Purchases) of U.S. Treasury securities	(154,028)	(536,710)
Sales of U.S. Treasury securities	658,117	866,588
U.S. Treasury interest and premium paid/amortized	2,931	2,025
(Purchases) of Private Investment Companies	(664,939)	(173,665)
Sales of Private Investment Companies	284,911	277,921
Investments in unconsolidated trading companies, at fair value	(3,575)	74
Interest receivable	8,914	1,163
Receivable from related parties	(988)	(33,267)
Other assets
Redemptions receivable from private investment companies	1,251	(1,250)
Interest payable to Managing Owner	(50)	44
Service fees payable to Managing Owner	1
Trading fees payable to Managing Owner	1,014	(769)
Subscriptions in advance for service fee rebates		189
Other liabilities	(751)	2,409
Net cash provided by operating activities	40,720	84,769
Cash Flows from Financing Activities:
Proceeds from sale of units
Payment for redemption of units	(104,319)	(67,488)
Change in owner redemptions payable		(4,276)
Net cash provided by (used in) financing activities	(104,319)	(71,764)
Net increase (decrease) in cash and cash equivalents	(63,599)	13,005
Cash and cash equivalents, beginning of period	93,327	34,272
Cash and cash equivalents, end of period	29,728	47,277
Frontier Balanced Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	735,021	(8,128,414)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	600,692	179,457
Net unrealized (gain)/loss on swap contracts		5,804,030
Net unrealized (gain)/loss on private investment companies	(570,451)	325,724
Net realized (gain)/loss on private investment companies	(304,097)	1,666,467
Net realized (gain)/loss on U.S. Treasury securities	6,663	(28,151)
Net unrealized (gain)/loss on U.S. Treasury securities	1,089	5,409
(Purchases) of swap contracts		(1,178,697)
(Purchases) of U.S. Treasury securities	(902,849)	(3,570,232)
Sales of U.S. Treasury securities	1,569,802	3,616,957
U.S. Treasury interest and premium paid/amortized	245	6,361
(Purchases) of Private Investment Companies	(2,196,236)	(4,464,511)
Sales of Private Investment Companies	3,756,872	6,308,097
Open trade equity/(deficit), at fair value	16,111	175,959
Receivable from futures commission merchants	(554,694)	1,745,358
Control of ownership of Private Investment Companies
Investments in unconsolidated trading companies, at fair value	49,755	50,867
Interest receivable	25,471	4,270
Receivable from related parties	52,804
Incentive fees payable to Managing Owner	54,924
Management fees payable to Managing Owner	(7,244)	108
Redemptions receivable from private investment companies	55,473	184,180
Interest payable to Managing Owner	(313)	256
Service fees payable to Managing Owner	(2,997)	(21,057)
Risk analysis fees payable	957	1,564
Payables to related parties		175,803
Trading fees payable to Managing Owner	(2,725)	(28,699)
Subscriptions in advance for service fee rebates	16,970	21,905
Other liabilities	(7,478)	(1,819)
Net cash provided by operating activities	2,393,765	2,851,192
Cash Flows from Financing Activities:
Proceeds from sale of units
Payment for redemption of units	(2,705,608)	(2,955,837)
Change in owner redemptions payable	50,040	(13,861)
Net cash provided by (used in) financing activities	(2,655,568)	(2,969,698)
Net increase (decrease) in cash and cash equivalents	(261,803)	(118,506)
Cash and cash equivalents, beginning of period	261,803	118,506
Cash and cash equivalents, end of period
Frontier Select Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	234,238	(443,981)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	(207,641)	(218,192)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on private investment companies	(152,712)	49,653
Net realized (gain)/loss on private investment companies	(145,302)	285,836
Net realized (gain)/loss on U.S. Treasury securities	2,430	(3,374)
Net unrealized (gain)/loss on U.S. Treasury securities	(385)	3,372
(Purchases) of swap contracts
(Purchases) of U.S. Treasury securities	(130,240)	(1,401,667)
Sales of U.S. Treasury securities	318,759	1,721,835
U.S. Treasury interest and premium paid/amortized
(Purchases) of Private Investment Companies	(235,774)	(1,911,902)
Sales of Private Investment Companies	616,847	2,323,820
Open trade equity/(deficit), at fair value
Receivable from futures commission merchants
Control of ownership of Private Investment Companies
Investments in unconsolidated trading companies, at fair value	(15,601)	500,499
Interest receivable	(121)	2,224
Receivable from related parties	(4,534)	(11,037)
Management fees payable to Managing Owner
Redemptions receivable from private investment companies	67,876	(128,396)
Interest payable to Managing Owner	70	458
Service fees payable to Managing Owner	(11)	(3,205)
Risk analysis fees payable
Payables to related parties	(26,129)
Trading fees payable to Managing Owner	70	(1,912)
Subscriptions in advance for service fee rebates	1,303	2,115
Other liabilities	1,872	(7,486)
Net cash provided by operating activities	325,015	758,660
Cash Flows from Financing Activities:
Proceeds from sale of units
Payment for redemption of units	(303,251)	(805,113)
Change in owner redemptions payable		793
Net cash provided by (used in) financing activities	(303,251)	(804,320)
Net increase (decrease) in cash and cash equivalents	21,764	(45,660)
Cash and cash equivalents, beginning of period		61,345
Cash and cash equivalents, end of period	21,764	15,685
Frontier Global Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	215,145	(756,267)
Change in:
Net realized (gain)/loss on swap contracts
(Purchases) sale of:
Sales of swap contracts
Reduction of collateral in Swap Contracts
Increase and/or decrease in:
Advance on unrealized Swap Appreciation
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	(225,147)	(572,676)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on private investment companies	(216,899)	970,042
Net realized (gain)/loss on private investment companies	(150,153)	(448,127)
Net realized (gain)/loss on U.S. Treasury securities	2,920	(11,338)
Net unrealized (gain)/loss on U.S. Treasury securities	531	3,645
(Purchases) of U.S. Treasury securities	(225,077)	(580,333)
Sales of U.S. Treasury securities	454,651	1,191,317
U.S. Treasury interest and premium paid/amortized
(Purchases) of Private Investment Companies	(410,446)	(463,750)
Sales of Private Investment Companies	1,043,400	1,924,065
Investments in unconsolidated trading companies, at fair value	(17,065)	(1,461)
Interest receivable	413	871
Receivable from related parties	(4,954)	(30,180)
Other assets
Redemptions receivable from private investment companies
Interest payable to Managing Owner	(65)	174
Service fees payable to Managing Owner	(823)	(4,494)
Trading fees payable to Managing Owner	(1,264)	(9,477)
Subscriptions in advance for service fee rebates	3,111	3,718
Other liabilities	1,973	(5,750)
Net cash provided by operating activities	470,251	1,209,979
Cash Flows from Financing Activities:
Proceeds from sale of units
Payment for redemption of units	(450,629)	(1,142,297)
Change in non-controlling interest
Change in owner redemptions payable		(52,324)
Net cash provided by (used in) financing activities	(450,629)	(1,194,621)
Net increase (decrease) in cash and cash equivalents	19,622	15,358
Cash and cash equivalents, beginning of period	5,694	27,532
Cash and cash equivalents, end of period	25,316	42,890
Frontier Heritage Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	390,766	(268,694)
Change in:
Net realized (gain)/loss on swap contracts		97,745
(Purchases) sale of:
Sales of swap contracts		1,491,965
Reduction of collateral in Swap Contracts		1,496,127
Increase and/or decrease in:
Advance on unrealized Swap Appreciation		(1,900,000)
Adjustments to reconcile net increase/(decrease) in capital resulting from operations to net cash provided by (used in) operating activities:
Net change in ownership allocation of U.S. Treasury Securities	(127,756)	(75,421)
Net unrealized (gain)/loss on swap contracts		(197,829)
Net unrealized (gain)/loss on private investment companies	(418,547)	75,695
Net realized (gain)/loss on private investment companies	(86,630)	56,727
Net realized (gain)/loss on U.S. Treasury securities	3,082	(9,015)
Net unrealized (gain)/loss on U.S. Treasury securities	178	7,369
(Purchases) of U.S. Treasury securities	(191,271)	(804,397)
Sales of U.S. Treasury securities	357,230	932,192
U.S. Treasury interest and premium paid/amortized
(Purchases) of Private Investment Companies	(394,302)	(941,369)
Sales of Private Investment Companies	702,567	979,165
Investments in unconsolidated trading companies, at fair value	(26,706)	(1,025)
Interest receivable	1,245	1,405
Receivable from related parties	(7,752)	(45,263)
Other assets
Redemptions receivable from private investment companies
Interest payable to Managing Owner	229	160
Service fees payable to Managing Owner	256	(818)
Trading fees payable to Managing Owner	412	(3,602)
Subscriptions in advance for service fee rebates	4,871	4,721
Other liabilities	3,012	2,701
Net cash provided by operating activities	210,884	898,539
Cash Flows from Financing Activities:
Proceeds from sale of units
Payment for redemption of units	(184,768)	(389,465)
Change in non-controlling interest		(479,024)
Change in owner redemptions payable		(9,735)
Net cash provided by (used in) financing activities	(184,768)	(878,224)
Net increase (decrease) in cash and cash equivalents	26,116	20,315
Cash and cash equivalents, beginning of period	15,156	44,011
Cash and cash equivalents, end of period	$ 41,272	$ 64,326

Condensed Schedules of Investme

Condensed Schedules of Investments (Unaudited)	9 Months Ended
	Sep. 30, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Schedules of Investments (Unaudited)	Frontier Frontier Frontier Diversified Fund Masters Fund Long/Short Commodity Fund Fair % of Total Capital Fair % of Total Capital Fair % of Total Capital Description Value Value) Value Value) Value Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 726,697 23.14 % $ - 0.00 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 216,565 6.90 % - 0.00 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 573,120 18.25 % - 0.00 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 742,805 23.65 % 353,746 43.90 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 477,374 15.20 % 252,047 31.28 % 554,077 39.30 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 324,574 10.33 % 176,447 21.90 % - 0.00 % Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) - 0.00 % - 0.00 % 302,145 21.43 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC - 0.00 % - 0.00 % 479,374 34.00 % Total Private Investment Companies $ 3,061,135 97.47 % $ 782,240 97.07 % $ 1,335,596 94.72 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 30,579 0.97 % $ 16,239 2.02 % $ 21,311 1.51 % Total Investment in Unconsolidated Trading Companies $ 30,579 0.97 % $ 16,239 2.02 % $ 21,311 1.51 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value Fair Value $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ 33,471 1.07 % $ 17,774 2.21 % $ 23,326 1.65 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 27,099 $ 14,390 $ 18,885 Additional Disclosure on U.S. Treasury Securities Cost Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 34,116 $ 18,117 $ 23,775 Frontier Frontier Balanced Fund Select Fund Fair % of Total Capital Fair % of Total Capital Description Value (Net Asset Value) Value (Net Asset Value) LONG FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ (9,652 ) -0.10 % $ - 0.00 % Various agriculture futures contracts (Europe) 85,119 0.84 % - 0.00 % Various agriculture futures contracts (U.S.) 43,697 0.43 % - 0.00 % Various base metals futures contracts (U.S.) (39,727 ) -0.39 % - 0.00 % Various currency futures contracts (Europe) (481 ) 0.00 % - 0.00 % Various currency futures contracts (Far East) (15,984 ) -0.16 % - 0.00 % Various currency futures contracts (Latin America) (9,108 ) -0.09 % - 0.00 % Various currency futures contracts (U.S.) 7,388 0.07 % - 0.00 % Various energy futures contracts (U.S.) 79,410 0.78 % - 0.00 % Various interest rates futures contracts (Europe) (334,215 ) -3.30 % - 0.00 % Various interest rates futures contracts (Far East) (24,169 ) -0.24 % - 0.00 % Various interest rates futures contracts (U.S.) (14,625 ) -0.14 % - 0.00 % Various precious metal futures contracts (U.S.) (5,456 ) -0.05 % - 0.00 % Various stock index futures contracts (Europe) (5,437 ) -0.05 % - 0.00 % Various stock index futures contracts (Far East) (3,432 ) -0.03 % - 0.00 % Various stock index futures contracts (Oceanic) (1,626 ) -0.02 % - 0.00 % Various stock index futures contracts (U.S.) (10,558 ) -0.10 % - 0.00 % Various stock index futures contracts (Canada) (3,951 ) -0.04 % - 0.00 % Total Long Futures Contracts $ (262,807 ) -2.59 % $ - 0.00 % SHORT FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ 3,818 0.04 % $ - 0.00 % Various agriculture futures contracts (Europe) (55,212 ) -0.54 % - 0.00 % Various agriculture futures contracts (U.S.) 1,372 0.01 % - 0.00 % Various base metals futures contracts (U.S.) 9,982 0.10 % - 0.00 % Various currency futures contracts (Europe) 30,456 0.30 % - 0.00 % Various currency futures contracts (Far East) 828 0.01 % - 0.00 % Various currency futures contracts (Latin America) 20,698 0.20 % - 0.00 % Various currency futures contracts (U.S.) (4,750 ) -0.05 % - 0.00 % Various energy futures contracts (U.S.) (43,480 ) -0.43 % - 0.00 % Various interest rates futures contracts (Europe) 264,970 2.61 % - 0.00 % Various interest rates futures contracts (Far East) 35,149 0.35 % - 0.00 % Various interest rates futures contracts (U.S.) 5,313 0.05 % - 0.00 % Various precious metal futures contracts (U.S.) 67,448 0.67 % - 0.00 % Various stock index futures contracts (Canada) 2,986 0.03 % - 0.00 % Various stock index futures contracts (Europe) 8,521 0.08 % - 0.00 % Various stock index futures contracts (U.S.) (963 ) -0.01 % - 0.00 % Total Short Futures Contracts $ 347,136 3.42 % $ - 0.00 % Total Open Trade Equity (Deficit) $ 84,329 0.83 % $ - 0.00 % PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 1,692,724 16.69 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 968,038 9.55 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 1,326,119 13.08 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 1,765,668 17.41 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 2,613,293 25.77 % 982,926 62.05 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC 1,476,322 14.56 % 572,680 36.15 % Total Private Investment Companies $ 9,842,164 97.06 % $ 1,555,606 98.20 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ - 0.00 % $ 15,601 0.98 % Total Investment in Unconsolidated Trading Companies $ - 0.00 % $ 15,601 0.98 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ - 0.00 % $ 17,077 1.08 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ - $ 13,826 Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ - $ 17,406 Frontier Global Frontier Fund Heritage Fund Fair % of Total Capital Fair % of Total Capital Description Value (Net Asset Value) Value (Net Asset Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ 2,802,754 103.99 % $ 1,657,316 63.96 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC - - 907,058 35.00 % Total Private Investment Companies $ 2,802,754 103.99 % $ 2,564,374 98.96 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 18,148 0.67 % $ 29,586 1.14 % Total Investment in Unconsolidated Trading Companies $ 18,148 0.67 % $ 29,586 1.14 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ 19,864 0.74 % $ 32,384 1.25 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 16,082 $ 26,218 Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 20,246 $ 33,007 Frontier Frontier Frontier Diversified Fund Masters Fund Fund Fair % of Total Fair % of Total Fair % of Total Description Value Value) Value Value) Value Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 1,066,074 25.49 % $ - 0.00 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 414,692 9.91 % - 0.00 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 672,766 16.08 % - 0.00 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 732,066 17.50 % 486,659 48.98 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 435,119 10.40 % 258,609 26.03 % 272,294 20.73 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 323,886 7.74 % 269,323 27.11 % - 0.00 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC - 0.00 % - 0.00 % 465,759 35.46 % Total Private Investment Companies $ 3,644,603 87.12 % $ 1,014,591 102.12 % $ 738,053 56.19 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 16,669 0.40 % $ 907 0.09 % $ 17,736 1.35 % Total Investment in Unconsolidated Trading Companies $ 16,669 0.40 % $ 907 0.09 % $ 17,736 1.35 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value Fair Value $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 427,393 10.22 % $ 23,245 2.34 % $ 454,738 34.63 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 328,604 $ 17,872 $ 349,629 Additional Disclosure on U.S. Treasury Securities Cost Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 427,509 $ 23,251 $ 454,862 Frontier Frontier Balanced Fund Select Fund Fair % of Total Capital Fair % of Total Capital Description Value Value) Value Value) LONG FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ 72,005 0.59 % $ - 0.00 % Various agriculture futures contracts (Europe) 9,803 0.08 % - 0.00 % Various agriculture futures contracts (U.S.) 87,496 0.72 % - 0.00 % Various base metals futures contracts (U.S.) 22,858 0.19 % - 0.00 % Various currency futures contracts (Europe) 10,573 0.09 % - 0.00 % Various currency futures contracts (Latin America) 5,833 0.05 % - 0.00 % Various currency futures contracts (U.S.) (100 ) 0.00 % - 0.00 % Various interest rates futures contracts (Europe) 148,949 1.23 % - 0.00 % Various interest rates futures contracts (Far East) 2,882 0.02 % - 0.00 % Various interest rates futures contracts (U.S.) 2,438 0.02 % - 0.00 % Various precious metal futures contracts (U.S.) 28,625 0.24 % - 0.00 % Various soft futures contracts (U.S.) 52,349 0.43 % - 0.00 % Various stock index futures contracts (Far East) 5,312 0.04 % - - Total Long Futures Contracts $ 449,023 3.70 % $ - 0.00 % SHORT FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ (30,963 ) -0.26 % $ - 0.00 % Various agriculture futures contracts (Europe) (10,797 ) -0.09 % - 0.00 % Various agriculture futures contracts (U.S.) (92,738 ) -0.77 % - 0.00 % Various base metals futures contracts (U.S.) (10,289 ) -0.08 % - 0.00 % Various currency futures contracts (Europe) (10,381 ) -0.09 % - 0.00 % Various currency futures contracts (Latin America) 2,512 0.02 % - 0.00 % Various currency futures contracts (U.S.) 2,300 0.02 % - 0.00 % Various interest rates futures contracts (Europe) (127,832 ) -1.06 % - 0.00 % Various interest rates futures contracts (Far East) (2,482 ) -0.02 % - 0.00 % Various interest rates futures contracts (U.S.) 3,656 0.03 % - 0.00 % Various precious metal futures contracts (U.S.) (25,560 ) -0.21 % - 0.00 % Various soft futures contracts (U.S.) (42,669 ) -0.35 % - 0.00 % Various stock index futures contracts (Far East) (3,340 ) -0.03 % - 0.00 % Total Short Futures Contracts $ (348,583 ) -2.89 % $ - 0.00 % Total Open Trade Equity (Deficit) $ 100,440 0.81 % $ - 0.00 % PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 2,311,240 19.08 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 1,581,941 13.06 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 982,020 8.11 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 1,600,611 13.22 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 2,612,336 21.57 % 956,968 57.89 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 1,440,104 11.89 % 681,697 41.24 % Total Private Investment Companies $ 10,528,252 86.93 % $ 1,638,665 99.13 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 49,755 0.41 % $ - 0.00 % Total Investment in Unconsolidated Trading Companies $ 49,755 0.41 % $ - 0.00 % U.S. TREASURY SECURITIES (2) FACE VALU E Fair Value Fair Value $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 1,275,641 10.53 % $ - 0.00 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 980,787 $ - Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 1,275,989 $ - Frontier Frontier Global Fund Heritage Fund Fair % of Total Capital Fair % of Total Capital Description Value Value) Value Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ 3,068,656 104.71 % $ 1,539,331 64.53 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC - - 828,131 34.72 % Total Private Investment Companies $ 3,068,656 104.71 % $ 2,367,462 99.25 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 1,083 0.04 % $ 2,880 0.12 % Total Investment in Unconsolidated Trading Companies $ 1,083 0.04 % $ 2,880 0.12 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 27,742 0.95 % $ 73,847 3.10 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 21,330 $ 56,778 Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 27,750 $ 73,867 Fair % of Total Capital Description Value Value) LONG FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ (9,652 ) -0.04 % Various agriculture futures contracts (Europe) 85,119 0.38 % Various agriculture futures contracts (U.S.) 43,697 0.20 % Various base metals futures contracts (U.S.) (39,727 ) -0.18 % Various currency futures contracts (Europe) (481 ) 0.00 % Various currency futures contracts (Far East) (15,984 ) -0.07 % Various currency futures contracts (Latin America) (9,108 ) -0.04 % Various currency futures contracts (U.S.) 7,388 0.03 % Various energy futures contracts (U.S.) 79,410 0.36 % Various interest rates futures contracts (Europe) (334,215 ) -1.49 % Various interest rates futures contracts (Far East) (24,169 ) -0.11 % Various interest rates futures contracts (U.S.) (14,625 ) -0.07 % Various precious metal futures contracts (U.S.) (5,456 ) -0.02 % Various stock index futures contracts (Europe) (5,437 ) -0.02 % Various stock index futures contracts (Far East) (3,432 ) -0.02 % Various stock index futures contracts (Oceanic) (1,626 ) -0.01 % Various stock index futures contracts (U.S.) (10,558 ) -0.05 % Various stock index futures contracts (Canada) (3,951 ) -0.02 % Total Long Futures Contracts $ (262,807 ) -1.17 % SHORT FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ 3,818 0.02 % Various agriculture futures contracts (Europe) (55,212 ) -0.25 % Various agriculture futures contracts (U.S.) 1,372 0.01 % Various base metals futures contracts (U.S.) 9,982 0.04 % Various currency futures contracts (Europe) 30,456 0.14 % Various currency futures contracts (Far East) 828 0.00 % Various currency futures contracts (Latin America) 20,698 0.09 % Various currency futures contracts (U.S.) (4,750 ) -0.02 % Various energy futures contracts (U.S.) (43,480 ) -0.19 % Various interest rates futures contracts (Europe) 264,970 1.18 % Various interest rates futures contracts (Far East) 35,149 0.16 % Various interest rates futures contracts (U.S.) 5,313 0.02 % Various precious metal futures contracts (U.S.) 67,448 0.30 % Various stock index futures contracts (Canada) 2,986 0.01 % Various stock index futures contracts (Europe) 8,521 0.04 % Various stock index futures contracts (U.S.) (963 ) 0.00 % Total Short Futures Contracts $ 347,136 1.55 % Total Open Trade Equity (Deficit) $ 84,329 0.38 % Fair % of Total Capital Value Value) PRIVATE INVESTMENT COMPANIES (1) Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) $ 302,146 1.35 % Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 2,419,421 10.82 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 1,184,603 5.30 % Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC 131,464 0.59 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 1,899,239 8.49 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 7,322,291 32.74 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 5,786,775 25.87 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 2,550,021 11.40 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC 479,373 2.14 % Total Private Investment Companies $ 22,075,333 98.70 % U.S. TREASURY SECURITIES FACE VALUE $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ 143,896 0.64 % Total U.S. Treasury Securities $ 143,896 0.64 % Fair % of Total Capital Description Value Value) LONG FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ 72,005 0.28 % Various agriculture futures contracts (Europe) 9,803 0.04 % Various agriculture futures contracts (U.S.) 87,496 0.34 % Various base metals futures contracts (U.S.) 22,858 0.09 % Various currency futures contracts (U.S.) (100 ) 0.00 % Various currency futures contracts (Europe) 10,573 0.04 % Various currency futures contracts (Latin America) 5,833 0.02 % Various interest rates futures contracts (Europe) 148,949 0.58 % Various interest rates futures contracts (Far East) 2,882 0.01 % Various interest rates futures contracts (U.S.) 2,438 0.01 % Various precious metal futures contracts (U.S.) 28,625 0.11 % Various soft futures contracts (U.S.) 52,349 0.20 % Various stock index futures contracts (Far East) 5,312 0.02 % Total Long Futures Contracts $ 449,023 1.74 % SHORT FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ (30,963 ) -0.12 % Various agriculture futures contracts (Europe) (10,797 ) -0.04 % Various agriculture futures contracts (U.S.) (92,738 ) -0.36 % Various base metals futures contracts (U.S.) (10,289 ) -0.04 % Various currency futures contracts (U.S.) 2,300 0.01 % Various currency futures contracts (Europe) (10,381 ) -0.04 % Various currency futures contracts (Latin America) 2,512 0.01 % Various interest rates futures contracts (Europe) (127,832 ) -0.50 % Various interest rates futures contracts (Far East) (2,482 ) -0.01 % Various interest rates futures contracts (U.S.) 3,656 0.01 % Various precious metal futures contracts (U.S.) (25,560 ) -0.10 % Various soft futures contracts (U.S.) (42,669 ) -0.17 % Various stock index futures contracts (Far East) (3,340 ) -0.01 % Total Short Futures Contracts $ (348,583 ) -1.36 % Total Open Trade Equity (Deficit) $ 100,440 0.38 % PRIVATE INVESTMENT COMPANIES (1) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 3,377,314 13.21 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 1,996,633 7.81 % Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC 89,029 0.35 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 1,654,786 6.47 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 7,427,324 29.05 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 5,363,456 20.98 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 2,715,008 10.62 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC 465,759 1.82 % Total Private Investment Companies $ 23,089,312 90.31 % U.S. TREASURY SECURITIES FACE VALUE $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 2,282,606 8.93 % Total U.S. Treasury Securities $ 2,282,606 8.93 %

Organization and Purpose

Organization and Purpose	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Organization and Purpose [Line Items]
Organization and Purpose	1. Organization and Purpose Frontier Funds, which is referred to in this report as the “Trust”, was formed on August 8, 2003, as a Delaware statutory trust. Please refer to the consolidated financial statements of the Trust included within this periodic report. The Trust is a multi-advisor commodity pool, as described in Commodity Futures Trading Commission (“CFTC”) Regulation § 4.10(d)(2). The Trust has authority to issue separate series, or each, a Series, of units of beneficial interest (the “Units”) pursuant to the requirements of the Delaware Statutory Trust Act, as amended (the “Trust Act”). The assets of each Series are valued and accounted for separately from the assets of other Series. The Trust is not registered as an investment company under the Investment Company Act of 1940, as amended (the “Investment Company Act”). It is managed by Frontier Fund Management LLC (the “Managing Owner”). Purchasers of Units are limited owners of the Trust (“Limited Owners”) with respect to beneficial interests of the Series’ Units purchased. The Trust Act provides that, except as otherwise provided in the second amended and restated declaration of trust and trust agreement dated December 9, 2013, as further amended, by and among the Managing Owner, Wilmington Trust Company as trustee and the unitholders, as may be amended from time to time (“Trust Agreement”), unitholders of the Trust will have the same limitation of liability as do stockholders of private corporations organized under the General Corporation Law of the State of Delaware. The Trust Agreement confers substantially the same limited liability, and contains the same limited exceptions thereto, as would a limited partnership agreement for a Delaware limited partnership engaged in like transactions as the Trust. In addition, pursuant to the Trust Agreement, the Managing Owner of the Trust is liable for obligations of a Series in excess of that Series’ assets. Limited Owners do not have any such liability. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of the combined Series of the Trust. The Trust has been organized to pool investor funds for the purpose of trading in the United States (“U.S.”) and international markets for currencies, interest rates, stock indices, agricultural and energy products, precious and base metals and other commodities. The Trust may also engage in futures contracts, forwards, option contracts and other interest in derivative instruments, including swap contracts. The Trust has seven (7) separate and distinct Series of Units issued and outstanding: Frontier Diversified Fund, Frontier Masters Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund, and Frontier Heritage Fund, (each a “Series” and collectively, the “Series”). The Trust, with respect to the Series, may issue additional Series of Units. The Trust, with respect to each Series: ● engages in the speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts), and may, from time to time, engage in cash and spot transactions; ● allocates funds to a limited liability trading company or companies (“Trading Company” or “Trading Companies”) and Galaxy Plus (as defined below) entities. Except as otherwise described in these notes, each Trading Company and Galaxy Plus entity has one-year renewable contracts with its own independent commodity trading advisor (s), or each, a Trading Advisor, that will manage all or a portion of such Trading Company’s and Galaxy Plus assets and make the trading decisions for the assets of each Series invested in such Trading Company and Galaxy Plus entity. Each Trading Company and Galaxy Plus entity will segregate its assets from any other Trading Company and Galaxy Plus entity; ● maintains separate, distinct records for each Series, and accounts for the assets of each Series separately from the other Series; ● calculates the Net Asset Value (“NAV”) of its Units for each Series separately from the other Series; ● has an investment objective of increasing the value of each Series’ Units over the long term (capital appreciation), while managing risk and volatility; further, to offer exposure to the investment programs of individual Trading Advisors and to specific instruments; ● maintains each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 or Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund, and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series. Class 1AP was created as a sub-class of Class 1 and it has been presented separately because the fees applicable to it are different from those applicable to Class 1. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents; and ● all payments made to selling agents who are members of the Financial Industry Regulatory Authority, Inc. (“FINRA”) and their associated persons that constitute underwriting compensation will be subject to the limitations set forth in Rule 2310(b)(4)(B)(ii) (formerly Rule 2810(b)(4)(B)(ii)) of the Conduct Rules of FINRA (“Rule 2310”). An investor’s Class 1 Units or Class 2 Units of any Series, or Class 1a Units or Class 2a Units of the Frontier Long/Short Commodity Fund or Frontier Balanced Fund will be classified as Class 3 or Class 3a Units of such Series, as applicable, when the Managing Owner determines that the fee limitation set forth in Rule 2310 with respect to such Units has been reached or will be reached. The service fee limit applicable to each unit sold is reached upon the earlier of when (i) the aggregate initial and ongoing service fees received by the selling agent with respect to such unit equals 9% of the purchase price of such unit or (ii) the aggregate underwriting compensation (determined in accordance with FINRA Rule 2310) paid in respect of such unit totals 10% of the purchase price of such unit. No service fees are paid with respect to Class 3 or Class 3a Units. Units of any Class in a Series may be redeemed, in whole or in part, on a daily basis, at the then current NAV per Unit for such Series on the day of the week after the date the Managing Owner is in receipt of a redemption request for at least one (1) business day to be received by the Managing Owner prior to 4:00 PM in New York. The assets of any particular Series include only those funds and other assets that are paid to, held by or distributed to the Trust, with respect to the Series, on account of and for the benefit of that Series. Under the “Inter-Series Limitation on Liability” expressly provided for under Section 3804(a) of the Trust Act, separate and distinct records of the cash and equivalents, although pooled for maximizing returns, are maintained in the books and records of each Series. As of September 30, 2021, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund, separates Units into two separate Classes—Class 2 and Class 3. The Trust, with respect to the Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund separates Units into a maximum of three separate Classes- Class 1, Class 2 and Class 1AP. The Trust, with respect to the Frontier Balanced Fund separates Units into a maximum of five separate Classes—Class 1, Class 1AP, Class 2, Class 2A and Class 3A. The Trust, with respect to the Frontier Long/Short Commodity Fund separates Units into a maximum of five separate Classes—Class 1A, Class 2A, Class 2, Class 3A and Class 3. Frontier Masters Fund Class 1 was closed as of April 1, 2021, and Frontier Diversified Fund Class 1 was closed as of July 21, 2021. Between April 15, 2016 and May 10, 2017, a portion of the interests in Frontier Trading Company I, LLC and all of the interests in Frontier Trading Company VII, LLC, Frontier Trading Company XV, LLC, and Frontier Trading Company XXIII LLC held by Frontier Diversified Fund, Frontier Masters Fund, Frontier Select Fund, Frontier Balanced Fund and Frontier Long/Short Commodity Fund were exchanged for equivalent interests in the Galaxy Plus Managed Account Platform (“Galaxy Plus”) which is an unaffiliated, third-party managed account platform. The assets of Frontier Trading Company I, LLC, which included exposure to Quantmetrics Capital Management LLP’s Multi-Strategy Program, Quantitative Investment Management, LLC’s Quantitative Global Program, Quest Partners LLC’s Quest Tracker Index Program, Chesapeake Capital Management, LLC’s Diversified Program, and Doherty Advisors LLC’s Relative Value Moderate Program, the assets of Frontier Trading Company VII, LLC, which included exposure to Emil van Essen LLC’s Multi-Strategy Program, Red Oak Commodity Advisors, Inc.’s Fundamental Diversified Program, Rosetta Capital Management, LLC’s Rosetta Trading Program, and Landmark Trading Company’s Landmark Program, the assets of Frontier Trading Company XV, LLC, which included exposure to Transtrend B.V.’s TT Enhanced Risk (USD) Program, and the assets of Frontier Trading Company XXIII, LLC which included exposure to Fort L.P.’s Global Contrarian Program have been transferred to individual Delaware limited liability companies (“Master Funds”) in Galaxy Plus. Each Master Fund is sponsored and operated by Gemini Alternative Funds, LLC (“Sponsor”). The Sponsor has contracted with the Trading Advisors to manage the portfolios of the Master Funds pursuant to the advisors’ respective program. For those Series that invest in Galaxy Plus, approximately 30-70% of those Series assets are used to support the margin requirements of the Master Funds. The remaining assets of the Series are split between investments in Trading Companies and a pooled cash management account that invests primarily in U.S. Treasury securities. All the funds are invested in Galaxy Plus entities. Each of the Series has invested a portion of its assets in several different Trading Companies or Galaxy Plus entities and one or more Trading Advisors may manage the assets invested in such Trading Companies or Galaxy Plus entities. The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, currency trading companies, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct.
Frontier Funds [Member]
Organization and Purpose [Line Items]
Organization and Purpose	1. Organization and Purpose Frontier Funds, which is referred to in this report as the “Trust”, was formed on August 8, 2003, as a Delaware statutory trust and is set to expire on December 31, 2053. The Trust is a multi-advisor commodity pool, as described in CFTC Regulation § 4.10(d)(2). The Trust has authority to issue separate Series of Units pursuant to the requirements of the Trust Act. The assets of each Series are valued and accounted for separately from the assets of other Series. The Trust is not registered as an investment company under the Investment Company Act. It is managed by the Managing Owner. Purchasers of Units are Limited Owners of the Trust with respect to beneficial interests of the Series’ Units purchased. The Trust Act provides that, except as otherwise provided in the second amended and restated declaration of trust and trust agreement dated December 9, 2013, as further amended, by and among the Managing Owner, Wilmington Trust Company as trustee and the unitholders, as amended from time to time (the “Trust Agreement”), unitholders of the Trust will have the same limitation of liability as do stockholders of private corporations organized under the General Corporation Law of the State of Delaware. The Trust Agreement confers substantially the same limited liability, and contains the same limited exceptions thereto, as would a limited partnership agreement for a Delaware limited partnership engaged in like transactions as the Trust. In addition, pursuant to the Trust Agreement, the Managing Owner of the Trust is liable for obligations of a Series in excess of that Series’ assets. Limited Owners do not have any such liability. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of all Series. The Trust has been organized to pool investor funds for the purpose of trading in the U.S. and international markets for currencies, interest rates, stock indices, agricultural and energy products, precious and base metals and other commodities. The Trust may also engage in futures contracts, forwards, option contracts and other interest in derivative instruments, including swap contracts. The Trust has seven (7) separate and distinct Series of Units issued and outstanding: Frontier Diversified Fund, Frontier Masters Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, Frontier Global Fund, and Frontier Heritage Fund. The Trust financial statements are comprised of unitized Series which are consolidated into the Trust financial statements. However, the consolidated Trust does not issue units. The Trust, with respect to each Series: ● engages in the speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts), and may, from time to time, engage in cash and spot transactions; ● allocates funds to a limited liability trading company or companies (“Trading Company” or “Trading Companies”) and Galaxy Plus (as defined below) entities. Except as otherwise described in these notes, each Trading Company and Galaxy Plus entity has one-year renewable contracts with its own independent commodity trading advisor (s), or each, a Trading Advisor, that will manage all or a portion of such Trading Company’s and Galaxy Plus assets and make the trading decisions for the assets of each Series invested in such Trading Company and Galaxy Plus entity. Each Trading Company and Galaxy Plus entity will segregate its assets from any other Trading Company and Galaxy Plus entity. ● maintains separate, distinct records for each Series, and accounts for the assets of each Series separately from the other Series; ● calculates the Net Asset Value (“NAV”) of its Units for each Series separately from the other Series; ● has an investment objective of increasing the value of each Series’ Units over the long term (capital appreciation), while managing risk and volatility; further, to offer exposure to the investment programs of individual Trading Advisors and to specific instruments; ● maintains each Series of Units in three to seven sub-classes—Class 1, Class 1AP, Class 1a, Class 2, Class 2a, Class 3, and Class 3a. Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 or Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2 Units of the Frontier Diversified Fund, and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series. Class 1AP was created as a sub-class of Class 1 and it has been presented separately because the fees applicable to it are different from those applicable to Class 1. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents; and ● all payments made to selling agents who are members of the Financial Industry Regulatory Authority, Inc. (“FINRA”) and their associated persons that constitute underwriting compensation will be subject to the limitations set forth in Rule 2310(b)(4)(B)(ii) (formerly Rule 2810(b)(4)(B)(ii)) of the Conduct Rules of FINRA (“Rule 2310”). An investor’s Class 1 Units or Class 2 Units of any Series, or Class 1a Units or Class 2a Units of the Frontier Long/Short Commodity Fund or Frontier Balanced Fund will be classified as Class 3 or Class 3a Units of such Series, as applicable, when the Managing Owner determines that the fee limitation set forth in Rule 2310 with respect to such Units has been reached or will be reached. The service fee limit applicable to each unit sold is reached upon the earlier of when (i) the aggregate initial and ongoing service fees received by the selling agent with respect to such unit equals 9% of the purchase price of such unit or (ii) the aggregate underwriting compensation (determined in accordance with FINRA Rule 2310) paid in respect of such unit totals 10% of the purchase price of such unit. No service fees are paid with respect to Class 3 or Class 3a Units. Units of any Class in a Series may be redeemed, in whole or in part, on a daily basis, at the then current NAV per Unit for such Series on the day of the week after the date the Managing Owner is in receipt of a redemption request for at least one (1) business day to be received by the Managing Owner prior to 4:00 PM in New York. Frontier Masters Fund Class 1 was closed as of April 1, 2021 and Frontier Diversified Fund Class 1 was closed as of July 21, 2021 The assets of any particular Series include only those funds and other assets that are paid to, held by or distributed to the Trust on account of and for the benefit of that Series. Under the “Inter-Series Limitation on Liability” expressly provided for under Section 3804(a) of the Trust Act, separate and distinct records of the cash and equivalents, although pooled for maximizing returns, are maintained in the books and records of each Series. As of September 30, 2021, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund, separates Units into two separate Classes—Class 2 and Class 3. The Trust, with respect to the Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund separates Units into a maximum of three separate Classes—Class 1, Class 2 and Class 1AP. The Trust, with respect to the Frontier Balanced Fund separates Units into a maximum of five separate Classes—Class 1, Class 1AP, Class 2, Class 2A and Class 3A. The Trust, with respect to the Frontier Long/Short Commodity Fund separates Units into a maximum of five separate Classes—Class 1A, Class 2A, Class 2, Class 3A and Class 3. Between April 15, 2016 and May 10, 2017, a portion of the interests in Frontier Trading Company I, LLC and all of the interests in Frontier Trading Company VII, LLC, Frontier Trading Company XV, LLC, and Frontier Trading Company XXIII LLC held by Frontier Diversified Fund, Frontier Masters Fund, Frontier Select Fund, Frontier Balanced Fund and Frontier Long/Short Commodity Fund were exchanged for equivalent interests in the Galaxy Plus Managed Account Platform (“Galaxy Plus”) which is an unaffiliated, third-party managed account platform. The assets of Frontier Trading Company I, LLC, which included exposure to Quantmetrics Capital Management LLP’s Multi-Strategy Program, Quantitative Investment Management, LLC’s Quantitative Global Program, Quest Partners LLC’s Quest Tracker Index Program, Chesapeake Capital Management, LLC’s Diversified Program, and Doherty Advisors LLC’s Relative Value Moderate Program, the assets of Frontier Trading Company VII, LLC, which included exposure to Emil van Essen LLC’s Multi-Strategy Program, Red Oak Commodity Advisors, Inc.’s Fundamental Diversified Program, Rosetta Capital Management, LLC’s Rosetta Trading Program, and Landmark Trading Company’s Landmark Program, the assets of Frontier Trading Company XV, LLC, which included exposure to Transtrend B.V.’s TT Enhanced Risk (USD) Program, and the assets of Frontier Trading Company XXIII, LLC which included exposure to Fort L.P.’s Global Contrarian Program have been transferred to individual Delaware limited liability companies (“Master Funds”) in Galaxy Plus. Each Master Fund is sponsored and operated by Gemini Alternative Funds, LLC (“Sponsor”). The Sponsor has contracted with the Trading Advisors to manage the portfolios of the Master Funds pursuant to the advisors’ respective program. For those Series that invest in Galaxy Plus, approximately 30-70% of those Series assets are used to support the margin requirements of the Master Funds. The remaining assets of the Series are split between investments in Trading Companies and a pooled cash management account that invests primarily in U.S. Treasury securities. For those Series that do not invest in Galaxy Plus, their assets are split between investments in Trading Companies and investments in the pooled cash management account. Each of the Series has invested a portion of its assets in several different Trading Companies or Galaxy Plus entities and one or more Trading Advisors may manage the assets invested in such Trading Companies or Galaxy Plus entities. The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, currency trading companies, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct.

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Significant Accounting Policies [Line Items]
Significant Accounting Policies	2. Significant Accounting Policies The following are the significant accounting policies of the Series of the Trust. Basis of Presentation Consolidation Galaxy Plus entities are co-mingled investment vehicles. In addition to the Series, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series’ ownership percentage in Galaxy Plus entities. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies. Use of Estimates— Cash and Cash Equivalents— Interest Income U U.S. Treasury Securities— Fair Value Measurements and Disclosures (“ Receivable From Futures Commission Merchants Investment Transactions— Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest is recognized in the period earned and the instruments are marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the statements of operations. Purchase and Sales of Private Investment Companies Foreign Currency Transactions— Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific Series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities. Investments and Swaps Income Taxes Income Taxes The 2017 through 2020 tax years generally remain subject to examination by U.S. federal and most state tax authorities. In the opinion of the Managing Owner, (i) the Trust, with respect to the Series, is treated as a partnership for federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Units of the Trust. Fees and Expenses Incentive Fee (rebate) Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2018, 2019 and 2020 the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2021 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $22,650, $393, $31,725, $363,825, $20,766, $157,782 and $68,076 for the Frontier Diversified, Long/Short Commodity, Masters, Balanced, Select, Global and Heritage Funds, respectively, as of September 30, 2021. These service fees are part of the offering costs of the Trust, with respect to the Series, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. Pending Owner Additions— Owner redemptions payable— Recently Adopted Accounting Pronouncements— Subsequent Events—The Series follow the provisions of ASC 855, Subsequent Events
Frontier Funds [Member]
Significant Accounting Policies [Line Items]
Significant Accounting Policies	2. Significant Accounting Policies The following are the significant accounting policies of the Trust. Basis of Presentation Consolidation The income or loss attributable thereto in proportion of investment level is shown in the statements of operations as change in fair value of investments in unconsolidated Trading Companies or net unrealized gain/(loss) on private investment companies. The Trading Companies and Series of the Trust are consolidated by the Trust. All intercompany transactions have been eliminated in consolidation. Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust’s ownership percentage in Galaxy Plus entities. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies. Use of Estimates— Cash and Cash Equivalents— Interest Income U.S. Treasury Securities— Fair Value Measurements and Disclosures (“ Receivable from Futures Commission Merchants Investment Transactions—Futures, options on futures, forward and swap contracts are recorded on a trade date basis and realized gains or losses are recognized when contracts are settled. Unrealized gains or losses on open contracts (the difference between contract trade price and market price) are reported in the consolidated statements of financial condition as a net unrealized gain or loss, as there exists a right of offset of unrealized gains or losses in accordance with FASB ASC 210, Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the consolidated statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest was recognized in the period earned and the instruments were marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the consolidated statements of operations. Purchase and Sales of Private Investment Companies Foreign Currency Transactions— Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust, or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities. Investments and Swaps— Income Taxes In the opinion of the Managing Owner, (i) the Trust is treated as a partnership for Federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material Federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Series Units of the Trust. Fees and Expenses— Incentive Fee (rebate)— Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2020, 2019 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2021 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $665,217 and $638,962 as of September 30, 2021 and December 31, 2020, respectively. These service fees are part of the offering costs of the Trust, which include registration and filing fees, legal and blue1 sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. Pending Owner Additions— Owner redemptions payable— Recently Adopted Accounting Pronouncements— Subsequent Events Subsequent Events

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Fair Value Measurements [Line Items]
Fair Value Measurements	3. Fair Value Measurements In connection with the valuation of investments the Series apply ASC 820. ASC 820 provides clarification that when a quoted price in an active market for the identical asset or liability is not available, a reporting entity is required to measure fair value using certain techniques. ASC 820 also clarifies that when estimating the fair value of an asset or liability, a reporting entity is not required to include a separate input or adjustment to other inputs relating to the existence of a restriction that prevents the transfer of an asset or liability. ASC 820 also clarifies that both a quoted price in an active market for the identical asset or liability at the measurement date and the quoted price for the identical asset or liability when traded as an asset in an active market when no adjustments to the quoted price of the asset are required are Level 1 fair value measurements. Level 1 Inputs Unadjusted quoted prices in active markets for identical financial assets that the reporting entity has the ability to access at the measurement date. Level 2 Inputs Inputs other than quoted prices included in Level 1 that are observable for the financial assets or liabilities, either directly or indirectly. These might include quoted prices for similar financial assets in active markets, quoted prices for identical or similar financial assets in markets that are not active, inputs other than quoted prices that are observable for the financial assets or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs Unobservable inputs for determining the fair value of financial assets that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the financial asset. The Trust, with respect to the Series, uses the following methodologies to value instruments within its financial asset portfolio at fair value: Trading Securities Swap Contracts. Swap contracts are reported at fair value. Valuation reports are generated and disseminated daily from the swap counterparty to the third-party administrator. The fair value is applied by the third-party administrator to calculate the daily performance. The Managing Owner reviews the third-party administrator performance reports and any noticeable exceptions are investigated. Unexplained exceptions are escalated to the Managing Owner’s Valuation Committee for further evaluation and resolution. Swap contracts are reported at fair value using Level 3 inputs. For the quarter ended September 30, 2021, the Trust did not have any total return swap investments. Investment in Unconsolidated Trading Companies Investments in Private Investment Companies The following table summarizes investment in each Series measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. September 30, 2021 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 30,579 $ - $ - $ 30,579 U.S. Treasury Securities 33,471 - - 33,471 Frontier Masters Fund Investment in Unconsolidated Trading Companies 16,239 - - 16,239 U.S. Treasury Securities 17,774 - - 17,774 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 21,311 - - 21,311 U.S. Treasury Securities 23,326 - - 23,326 Frontier Balanced Fund Open Trade Equity (Deficit) 84,329 - - 84,329 Frontier Select Fund - Investment in Unconsolidated Trading Companies 15,601 - - 15,601 U.S. Treasury Securities 17,077 - - 17,077 Frontier Global Fund - Investment in Unconsolidated Trading Companies 18,148 - - 18,148 U.S. Treasury Securities 19,864 - - 19,864 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 29,586 - - 29,586 U.S. Treasury Securities 32,384 - - 32,384 December 31, 2020 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 16,669 $ - $ - $ 16,669 U.S. Treasury Securities 427,393 - - 427,393 Frontier Masters Fund Investment in Unconsolidated Trading Companies 907 - - 907 U.S. Treasury Securities 23,245 - - 23,245 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 17,736 - - 17,736 U.S. Treasury Securities 454,738 - - 454,738 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 49,755 - - 49,755 Open Trade Equity (Deficit) 100,440 - - 100,440 U.S. Treasury Securities 1,275,641 - - 1,275,641 Frontier Global Fund Investment in Unconsolidated Trading Companies 1,083 - - 1,083 U.S. Treasury Securities 27,742 - - 27,742 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 2,880 - - 2,880 U.S. Treasury Securities 73,847 - - 73,847 The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses included in earnings are classified in “realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts” on the statements of operations. Investment in unconsolidated trading company asset gains and losses (realized/unrealized) included in earnings are classified in “Change in fair value of investments in unconsolidated trading companies”. During year ended December 2020, all identified Level 3 assets were components of the Frontier Diversified Fund, Frontier Long/Short Commodity Fund, Frontier Balanced Fund, Frontier Select Fund, and Frontier Heritage Fund. During the year ended December 31, 2020, the entire investments in the swaps were sold. For the Year Ended December 31, 2020 Swaps Frontier Frontier Balance of recurring Level 3 assets as of January 1, 2020 $ 11,944,753 $ 362,521 Total gains or losses (realized/unrealized): Included in earnings-realized (2,448,166 ) 188,100 Included in earnings-unrealized (3,088,917 ) 44,277 Proceeds from collateral reduction (6,176,555 ) (115,000 ) Sale of investments (7,586,366 ) (594,898 ) Purchase of investments 7,355,251 115,000 Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2020 $ - $ - Frontier Frontier Balance of recurring Level 3 assets as of January 1, 2020 $ 6,384,583 $ 2,888,009 Total gains or losses (realized/unrealized): Included in earnings-realized (446,306 ) (97,745 ) Included in earnings-unrealized (1,537,399 ) 197,829 Proceeds from collateral reduction (4,000,000 ) (2,474,937 ) Sale of investments (4,870,025 ) (1,491,965 ) Purchase of investments 4,469,147 978,809 Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2020 $ - $ - Investments in Unconsolidated Trading Companies Frontier Balance of recurring Level 3 assets as of January 1, 2020 $ 479,024 Change in fair value of investments in unconsolidated trading companies 95,915 Proceeds from sales of investments of unconsolidated trading companies (574,939 ) Purchases of investments of unconsolidated trading companies - Change in ownership allocation - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2020 $ - The Series of the Trust assess the levels of the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Series’ accounting policy regarding the recognition of transfers between levels of the fair value hierarchy. During the nine months ended September 30, 2021, the Trust did not transfer any assets between Levels 1, 2 or 3. The amounts reflected in the change in ownership allocation result from changes in ownership in the underlying Trading Companies at the Series level, which have resulted in changes in consolidation or de-consolidation by the Series. The ownership in the Trading Companies is accounted for under the equity method, which approximates fair value. The Frontier Heritage Fund and the Frontier Select Fund jointly owned the Frontier Brevan Howard swap. The Frontier Heritage Fund owned the majority interest in the Frontier Brevan Howard swap. The Frontier Select Fund (through its investment in an unconsolidated trading company) and Frontier Heritage Fund Brevan Howard swap investments were liquidated on May 30, 2020 and Frontier Balanced Fund, Frontier Long/Short Commodity Fund, Frontier Diversified Fund TRS swap investments were liquidated on December 21, 2020. The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2020. Frontier Frontier Frontier Frontier Swap Contracts $ (1,537,399 ) $ 44,277 $ (3,088,917 ) $ 197,829 Frontier Investments in Unconsolidated Trading Companies $ (91,989 )
Frontier Funds [Member]
Fair Value Measurements [Line Items]
Fair Value Measurements	3. Fair Value Measurements In connection with the valuation of investments the Trust applies ASC 820, Fair Value Measurement (“ASC 820”) Level 1 Inputs Unadjusted quoted prices in active markets for identical financial assets that the reporting entity has the ability to access at the measurement date. Level 2 Inputs Inputs other than quoted prices included in Level 1 that are observable for the financial assets or liabilities, either directly or indirectly. These might include quoted prices for similar financial assets in active markets, quoted prices for identical or similar financial assets in markets that are not active, inputs other than quoted prices that are observable for the financial assets or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs Unobservable inputs for determining the fair value of financial assets that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the financial asset. The Trust uses the following methodologies to value instruments within its financial asset portfolio at fair value: Trading Securities. Swap Contracts. Investments in Private Investment Companies The following table summarizes the instruments that comprise the Trust’s financial asset portfolio, in aggregate, measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value: September 30, 2021 Level 1 Level 2 Level 3 Total Fair Open Trade Equity (Deficit) $ 84,329 $ - $ - $ 84,329 U.S. Treasury Securities 143,896 - - 143,896 December 31, 2020 Level 1 Level 2 Level 3 Total Fair Open Trade Equity (Deficit) $ 100,440 $ - $ - $ 100,440 U.S. Treasury Securities 2,282,606 - - 2,282,606 The changes in Level 3 assets measured at fair value on a recurring basis are summarized in the following tables. Swap contract asset gains and losses (realized/unrealized) included in earnings are classified in “realized and unrealized gain (loss) on investments – net unrealized gain/(loss) on swap contracts” on the statements of operations. Swaps For the Year Balance of recurring Level 3 assets as of January 1, 2020 $ 21,579,865 Total gains or losses (realized/unrealized): Included in earnings-realized (2,896,106 ) Included in earnings-unrealized (4,384,210 ) Proceeds from collateral reduction (12,674,502 ) Purchase of investments 12,918,207 Sale of investments (14,543,254 ) Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2020 $ - The Trust assesses the levels of the investments at each measurement date, and transfers between levels are recognized on the actual date of the event or change in circumstances that caused the transfer in accordance with the Trust’s accounting policy regarding the recognition of transfers between levels of the fair value hierarchy. During the nine months ended September 30, 2021 and December 31, 2020, the Trust did not transfer any assets between Levels 1, 2 and 3. The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2020: Swaps $(4,384,210).

Swap Contracts

Swap Contracts	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Swap Contracts [Line Items]
Swap Contracts	4. Swap Contracts In addition to authorizing Trading Advisors to manage predetermined investment levels of futures, option on futures and forward contracts, certain Series of the Trust will strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Total return swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical total return swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount or value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. Each Series’ investment in swaps will likely differ substantially over time due to cash flows, portfolio management decisions and market movements. The swaps serve to diversify the investment holdings of each Series and to provide access to programs and advisors that would not be otherwise available to the Series, and are not used for hedging purposes. The Managing Owner follows a procedure in selecting well-established financial institutions which the Managing Owner, in its sole discretion, considers to be reputable, reliable, financially responsible and well established to act as swap counterparties. The procedure includes due diligence review of documentation on all new and existing financial institution counterparties prior to initiation of the relationship, and quarterly ongoing review during the relationship, to ensure that counterparties meet the Managing Owner’s minimum credit requirements, the counterparty average rating being no less than an investment grade rating as defined by the rating agencies. As of December 31, 2020, none of the Trust’s assets were deposited with over-the-counter counterparties in order to initiate and maintain swaps and is recorded as collateral within the swap fair value within the Statements of Financial Condition. The cash held with the counterparty is not restricted. The Series may strategically invest assets in one or more swaps linked to certain underlying investments or indices at the direction of the Managing Owner. The Trading Company in which the assets of these Series will be invested will not own any of the investments or indices referenced by any swap entered into by these Series. In addition, neither the swap counterparty to the Trading Company of these Series nor any advisor referenced by any such swap is a Trading Advisor to these Series. To help to reduce counterparty risk on the Series, the Managing Owner has the right to reduce the Series’ exposure and remove cash from the Series’ total return swaps with Deutsche Bank AG. This cash holding shall be in excess of $250,000 and may not exceed 40% of the index exposure in total. Index exposure is defined as the total notional amount plus any profit. The Series are charged interest on this cash holding and any amount removed will be offset against the final settlement value of the swap. The Frontier Select Fund (through its investment in an unconsolidated trading company) and Frontier Heritage Fund Brevan Howard swap investments were liquidated on May 30, 2020 and Frontier Balanced Fund, Frontier Long/Short Commodity Fund, Frontier Diversified Fund TRS swap investments were liquidated on December 21, 2020. The Series have invested in the following swaps as of and for the year ended December 31, 2020: Frontier Frontier Frontier Frontier Total Total Total Total Counterparty Deutsche Deutsche Deutsche Deutsche Realized Gain/(Loss) $ (2,448,166 ) $ (446,306 ) $ 188,100 $ (97,745 ) Change in Unrealized Gain/(Loss) $ (3,088,917 ) $ (1,537,399 ) $ 44,277 $ 197,829 Fair Value as of December 31, 2020 $ 0 $ 0 $ 0 $ 0 Advance on swap appreciation $ 0 $ 0 $ 0 $ 0
Frontier Funds [Member]
Swap Contracts [Line Items]
Swap Contracts	4. Swap Contracts In addition to authorizing Trading Advisors to manage predetermined investment levels of futures and forward contracts, certain Series of the Trust will strategically invest a portion or all of their assets in total return swaps, selected at the direction of the Managing Owner. Total return swaps are privately negotiated contracts designed to provide investment returns linked to those produced by one or more investment products or indices. In a typical total return swap, two parties agree to exchange the returns (or differentials in rates of return) earned or realized on one or more particular predetermined investments or instruments. The gross returns to be exchanged or “swapped” between the parties are calculated with respect to a “notional amount” (i.e., the amount or value of the underlying asset used in computing the particular interest rate, return, or other amount to be exchanged) in a particular investment, or in a “basket” of securities. The Trust’s investment in swaps will likely differ substantially over time due to cash flows, portfolio management decisions and market movements. The swaps serve to diversify the investment holdings of the Trust and to provide access to programs and advisors that would not be otherwise available to the Trust and are not used for hedging purposes. The Managing Owner follows a procedure in selecting well-established financial institutions which the Managing Owner, in its sole discretion, considers to be reputable, reliable, financially responsible and well established to act as swap counterparties. The procedure includes due diligence review of documentation on all new and existing financial institution counterparties prior to initiation of the relationship, and quarterly ongoing review during the relationship, to ensure that counterparties meet the Managing Owner’s minimum credit requirements, the counterparty average rating being no less than an investment grade rating as defined by the rating agencies. As of December 31, 2020, all swaps were sold so that no Trust’s assets were deposited with over-the-counter counterparties. The Trust strategically invests assets in one or more swaps linked to certain underlying investments or indices at the direction of the Managing Owner. The Trading Company in which the assets of the Trust will be invested will not own any of the investments or indices referenced by any swap entered into by the Trust. In addition, neither the swap counterparty nor any advisor referenced by any such swap is a Trading Advisor to the Trust. To help to reduce counterparty risk on the Series, the Managing Owner has the right to reduce the Series’ exposure and remove cash from the Series’ total return swaps with Deutsche Bank AG. This cash holding shall be in excess of $250,000 and may not exceed 40% of the index exposure in total. Index exposure is defined as the total notional amount plus any profit. The Series are charged interest on this cash holding and any amount removed will be offset against the final settlement value of the swap. The Frontier Select Fund (through its investment in an unconsolidated trading company) and Frontier Heritage Fund Brevan Howard swap investments were liquidated on May 30, 2020 and Frontier Balanced Fund, Frontier Long/Short Commodity Fund, Frontier Diversified Fund TRS swap investment were liquidated on December 21, 2020. The Trust had invested in the following swaps as of and for the year ended December 31, 2020: XXXIV XXXV XXXVII L/S Brevan Howard Total Total Total Total Counterparty Deutsche Deutsche Deutsche Deutsche Realized Gain/(Loss) $ (2,448,166 ) $ (446,306 ) $ 188,100 $ (189,734 ) Change in Unrealized Gain/(Loss) $ (3,088,917 ) $ (1,537,399 ) $ 44,277 $ 197,829 Fair Value as of December 31, 2020 $ 0 $ 0 $ 0 $ 0 Advance on swap appreciation $ 0 $ 0 $ 0 $ 0

Investments in Unconsolidated T

Investments in Unconsolidated Trading Companies and Private Investment Companies	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies [Line Items]
Investments in Unconsolidated Trading Companies and Private Investment Companies	5. Investments in Unconsolidated Trading Companies and Private Investment Companies Investments in unconsolidated Trading Companies and private investment companies represent cash and open trade equity invested in the Trading Companies and private investment companies and cumulative trading profits or losses allocated to each Series by the Trading Companies and private investment companies. Trading Companies and private investment companies allocate trading profits or losses on the basis of the proportion of each Series’ capital allocated for trading to each respective Trading Company, which bears no relationship to the amount of cash invested by a Series in the Trading Company and private investment companies. The Trading Companies are valued using the equity method of accounting, which approximates fair value. Investments in private investment companies are valued using the NAV provided by the underlying private investment. The Galaxy Plus entities are made up a feeder funds in which the Series invest and master trading entities into which the feeder funds invest. No investment held by the Galaxy Plus master trading entity is greater than 5% of the Series’ total capital. The following table summarizes each of the Series’ investments in unconsolidated Trading Companies as of September 30, 2021 and December 31, 2020: As of September 30, 2021 As of December 31, 2020 Percentage of Percentage of Series Total Series Total Capital Invested in Capital Invested in Series Unconsolidated Trading Companies Fair Value Unconsolidated Trading Companies Fair Value Frontier Diversified Series — Frontier Trading Company XXXVIII 0.97 % $ 30,579 0.40 % $ 16,669 Frontier Masters Fund --- Frontier Trading Company XXXVIII 2.02 % $ 16,239 0.09 % $ 907 Frontier Long/Short Commodity Fund --- Frontier Trading Company XXXVIII 1.51 % $ 21,311 1.35 % $ 17,736 Frontier Balanced Fund --- Frontier Trading Company XXXVIII 0.00 % $ - 0.41 % $ 49,755 Frontier Select Fund --- Frontier Trading Companies XXXVIII 0.98 % $ 15,601 0.00 % $ - Frontier Global Fund --- Frontier Trading Company XXXVIII 0.67 % $ 18,148 0.04 % $ 1,083 Frontier Heritage Fund --- Frontier Trading Company XXXVIII 1.14 % $ 29,586 0.12 % $ 2,880 The following tables summarize each of the Series’ equity in earnings from unconsolidated Trading Companies and private investment companies for the three and nine months ended September 30, 2021 and September 30, 2020. Three months ended September 30, 2021 and 2020 Three Months Ended September, 2021 Three Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (7,892 ) $ (7,892 ) $ - $ - $ 371 $ 371 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (1,527 ) 17,408 55,124 71,005 (1,694 ) (175,943 ) (21,260 ) (198,897 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - 105 105 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (5,782 ) (5,782 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (5,970 ) 169,823 (627,689 ) (463,836 ) (4,862 ) (3,470 ) (33,133 ) (41,465 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - - - - - (21,170 ) (21,170 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (3,803 ) (30,844 ) 222,902 188,255 (709 ) (231,484 ) 107,025 (125,168 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (4,627 ) 4,082 (85,162 ) (85,707 ) (3,539 ) (27,771 ) 22,238 (9,072 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (13,098 ) 183,530 (9,760 ) 160,672 (10,562 ) 101,830 (36,659 ) 54,609 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (1,703 ) (20,009 ) 22,204 492 (1,279 ) (396,950 ) (62,845 ) (461,074 ) Total $ (30,728 ) $ 323,990 $ (430,273 ) $ (137,011 ) $ (22,645 ) $ (733,788 ) $ (51,110 ) $ (807,543 ) Frontier Global Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 829 $ 829 $ - $ - $ (2,540 ) $ (2,540 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (2,503 ) 28,130 73,429 99,056 (3,236 ) (317,392 ) (114,867 ) (435,495 ) Total $ (2,503 ) $ 28,130 $ 74,258 $ 99,885 $ (3,236 ) $ (317,392 ) $ (117,407 ) $ (438,035 ) Frontier Select Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (69 ) $ (69 ) $ - $ - $ (1,518 ) $ (1,518 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - (587 ) (587 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (4,877 ) 67,663 (7,516 ) 55,270 (3,352 ) 33,407 (19,556 ) 10,499 Galaxy Plus Fund - TT Feeder Fund (531) LLC - - - - - - (2,763 ) (2,763 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (686 ) (8,299 ) 7,373 (1,612 ) - - (205,413 ) (205,413 ) Total $ (5,563 ) $ 59,364 $ (212 ) $ 53,589 $ (3,352 ) $ 33,407 $ (229,837 ) $ (199,782 ) Frontier Heritage Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 981 $ 981 $ - $ - $ 1,742 $ 1,742 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (1,439 ) 16,356 41,181 56,098 (1,524 ) (149,796 ) 275,381 124,061 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (4,691 ) 66,486 (7,146 ) 54,649 (3,338 ) 34,047 (22,669 ) 8,040 Total $ (6,130 ) $ 82,842 $ 35,016 $ 111,728 $ (4,862 ) $ (115,749 ) $ 254,454 $ 133,843 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (7 ) $ (7 ) $ - $ - $ (2,028 ) $ (2,028 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (882 ) (882 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (120 ) 26,360 (23,799 ) 2,441 (306 ) 40,222 (55,994 ) (16,078 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (2,730 ) 38,119 (5,606 ) 29,783 (1,198 ) 12,151 (9,162 ) 1,791 Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (3,298 ) 86,851 (96,446 ) (12,893 ) - - - - Total $ (6,148 ) $ 151,330 $ (125,858 ) $ 19,324 $ (1,504 ) $ 52,373 $ (68,066 ) $ (17,197 ) Frontier Diversified Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (449 ) $ (449 ) $ - $ - $ (426 ) $ (426 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (640 ) 7,312 23,964 30,636 (1,068 ) (107,528 ) (19,659 ) (128,255 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - 182 182 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (3,544 ) (3,544 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (2,513 ) 71,506 (271,402 ) (202,409 ) (2,034 ) (1,729 ) (18,808 ) (22,571 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - - - - - (9,084 ) (9,084 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (870 ) (6,983 ) 50,260 42,407 (271 ) (4,480 ) (47,525 ) (52,276 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - - - - - - - Galaxy Plus Fund - Quest Feeder Fund (517) LLC (2,008 ) 1,764 (37,507 ) (37,751 ) (2,406 ) (18,673 ) 13,323 (7,756 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (2,389 ) 33,745 (2,180 ) 29,176 (3,320 ) 40,922 (22,756 ) 14,846 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (379 ) (4,507 ) 4,402 (484 ) (639 ) (198,372 ) (32,551 ) (231,562 ) Total $ (8,799 ) $ 102,837 $ (232,912 ) $ (138,874 ) $ (9,738 ) $ (289,860 ) $ (140,848 ) $ (440,446 ) Frontier Masters Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (50 ) $ (50 ) $ - $ - $ (1,279 ) $ (1,279 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (296 ) 3,396 11,798 14,898 (608 ) (62,539 ) (9,877 ) (73,024 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - (147 ) (147 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (1,242 ) (1,242 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (1,258 ) 17,769 (1,385 ) 15,126 (1,164 ) 13,859 (11,510 ) 1,185 Galaxy Plus Fund - TT Feeder Fund (531) LLC - - - - - - (1,002 ) (1,002 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (208 ) (2,486 ) 2,113 (581 ) (365 ) (113,226 ) (22,157 ) (135,748 ) Total $ (1,762 ) $ 18,679 $ 12,476 $ 29,393 $ (2,137 ) $ (161,906 ) $ (47,214 ) $ (211,257 ) Nine months ended September 30, 2021 and 2020 Nine Months Ended September, 2021 Nine Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (36,142 ) $ (36,142 ) $ - $ - $ (9,094 ) $ (9,094 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (4,108 ) 173,578 114,603 284,073 (6,794 ) (163,459 ) (16,563 ) (186,816 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (433 ) - (433 ) (2,152 ) (55,735 ) 25,629 (32,258 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 252 - 252 (6,408 ) (718,397 ) 75,749 (649,056 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (19,136 ) 464,263 (786,970 ) (341,843 ) (20,836 ) (327,914 ) 156,749 (192,001 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (1,910 ) - (1,910 ) (502 ) (232,245 ) (42,835 ) (275,582 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (9,204 ) (233,955 ) 56,175 (186,984 ) (9,264 ) (899,303 ) 157,923 (750,644 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (13,536 ) 121,430 (7,184 ) 100,710 (5,240 ) 28,824 (6,624 ) 16,960 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (39,426 ) 996,949 146,910 1,104,433 (23,203 ) 698,761 (196,095 ) 479,463 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (3,787 ) (448,411 ) 368,448 (83,750 ) (1,279 ) (396,950 ) (62,845 ) (461,074 ) Total $ (89,197 ) $ 1,071,763 $ (144,160 ) $ 838,406 $ (75,678 ) $ (2,066,418 ) $ 81,994 $ (2,060,102 ) Frontier Global Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 13,159 $ 13,159 $ - $ - $ (2,994 ) $ (2,994 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (6,827 ) 293,622 80,258 367,053 (11,634 ) (316,235 ) (194,046 ) (521,915 ) Total $ (6,827 ) $ 293,622 $ 93,417 $ 380,212 $ (11,634 ) $ (316,235 ) $ (197,040 ) $ (524,909 ) Frontier Select Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 6,956 $ 6,956 $ - $ - $ (8,190 ) $ (8,190 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - 387 - 387 - - (2,203 ) (2,203 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (13,325 ) 321,795 38,851 347,321 (7,477 ) 228,470 (72,058 ) 148,935 Galaxy Plus Fund - TT Feeder Fund (531) LLC - 864 - 864 (5,392 ) (237,723 ) (35,753 ) (278,868 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (1,599 ) (198,484 ) 149,525 (50,558 ) - - (205,413 ) (205,413 ) Total $ (14,924 ) $ 124,562 $ 195,332 $ 304,970 $ (12,869 ) $ (9,253 ) $ (323,617 ) $ (345,739 ) Frontier Heritage Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 11,448 $ 11,448 $ - $ - $ (1,582 ) $ (1,582 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (3,865 ) 161,521 26,673 184,329 (4,298 ) (151,155 ) 238,686 83,233 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (12,655 ) 302,134 31,369 320,848 (7,216 ) 215,524 (85,350 ) 122,958 Total $ (16,520 ) $ 463,655 $ 69,490 $ 516,625 $ (11,514 ) $ 64,369 $ 151,754 $ 204,609 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 9,914 $ 9,914 $ - $ - $ (5,104 ) $ (5,104 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 36 - 36 (938 ) (103,100 ) 7,770 (96,268 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (543 ) 152,407 (126,776 ) 25,088 (978 ) (76,740 ) (71,464 ) (149,182 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (7,233 ) 173,929 14,090 180,786 (2,824 ) 88,947 (28,627 ) 57,496 Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (7,807 ) 107,810 (88,398 ) 11,605 - - - - Total $ (15,583 ) $ 434,182 $ (191,170 ) $ 227,429 $ (4,740 ) $ (90,893 ) $ (97,425 ) $ (193,058 ) Frontier Diversified Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 2,039 $ 2,039 $ - $ - $ 2,597 $ 2,597 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (2,057 ) 83,740 55,185 136,868 (4,438 ) (76,179 ) (9,500 ) (90,117 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (245 ) - (245 ) (1,348 ) (39,612 ) 17,858 (23,102 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 157 - 157 (4,119 ) (463,144 ) 50,394 (416,869 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (8,665 ) 136,292 (259,205 ) (131,578 ) (13,164 ) (203,387 ) 60,454 (156,097 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (1,166 ) - (1,166 ) (309 ) (144,282 ) (21,773 ) (166,364 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (2,224 ) (57,849 ) 6,460 (53,613 ) (4,112 ) (248,715 ) (1,085 ) (253,912 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,103 ) 62,491 48,289 103,677 (3,920 ) 35,081 (6,574 ) 24,587 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (6,964 ) 172,937 30,463 196,436 (10,591 ) 416,995 (40,991 ) 365,413 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (858 ) (104,890 ) 85,736 (20,012 ) (639 ) (198,372 ) (32,551 ) (231,562 ) Total $ (27,871 ) $ 291,467 $ (31,033 ) $ 232,563 $ (42,640 ) $ (921,615 ) $ 18,829 $ (945,426 ) Frontier Masters Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 9,882 $ 9,882 $ - $ - $ (3,554 ) $ (3,554 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - - - - - Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (1,068 ) 39,319 11,837 50,088 (2,657 ) (64,127 ) (37,949 ) (104,733 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (58 ) - (58 ) - - (59 ) (59 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 52 - 52 (1,540 ) (190,409 ) 30,438 (161,511 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (3,592 ) 91,267 10,976 98,651 (3,172 ) 109,775 (20,607 ) 85,996 Galaxy Plus Fund - TT Feeder Fund (531) LLC - 520 - 520 (1,851 ) (84,259 ) (11,424 ) (97,534 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (536 ) (72,777 ) 50,005 (23,308 ) (365 ) (113,226 ) (22,157 ) (135,748 ) Total $ (5,196 ) $ 58,323 $ 82,700 $ 135,827 $ (9,585 ) $ (342,246 ) $ (65,312 ) $ (417,143 ) The Series’ investments in private investment companies as of September 30, 2021 have certain redemption and liquidity restrictions which are described in the following table: Redemptions Redemptions Liquidity Notice Period Permitted Restrictions Frontier Diversified Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Frontier Masters Fund Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Frontier Long/Short Commodity Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) 24 hours Daily None Frontier Balanced Fund Multi-Strategy Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Frontier Select Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Frontier Global Fund Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Frontier Heritage Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None
Frontier Funds [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies [Line Items]
Investments in Unconsolidated Trading Companies and Private Investment Companies	5. Investments in Private Investment Companies Investments in private investment companies represent cash and open trade equity invested in the private investment companies as well as the cumulative trading profits or losses allocated to the Trust by the private investment companies. Private investment companies allocate trading profits or losses on the basis of the proportion of the Trust’s capital allocated for trading to each respective private investment company, which bears no relationship to the amount of cash invested by the Trust in the private investment companies. Investments in private investment companies are valued using the NAV provided by the underlying private investment. The Galaxy Plus structure is made up of feeder funds in which the Trust invests and master trading entities into which the feeder funds invest. No investment held by a Galaxy Plus master trading entity is greater than 5% of the Trust’s total capital. The following table summarizes the Trust’s equity in earnings from each of the private investment companies during the three and nine months ended September 30, 2021 and 2020: Three months ended September 30, 2021 and 2020 Three Months Ended September, 2021 Three Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (6,405 ) $ 72,602 $ 205,496 $ 271,693 $ (8,130 ) $ (813,198 ) $ 109,718 $ (711,610 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - (447 ) (447 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (11,450 ) (11,450 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (8,483 ) 241,329 (899,091 ) (666,245 ) (6,896 ) (5,199 ) (51,941 ) (64,036 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (120 ) 26,360 (23,799 ) 2,441 (306 ) 40,222 (86,248 ) (46,332 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (4,673 ) (37,827 ) 273,162 230,662 (980 ) (235,964 ) 59,500 (177,444 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - - - - - - - Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,635 ) 5,846 (122,669 ) (123,458 ) (5,945 ) (46,444 ) 35,561 (16,828 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (1,847 ) (1,847 ) - - (80,092 ) (80,092 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC - - - - - - (3,765 ) (3,765 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (29,043 ) 407,312 (33,593 ) 344,676 (22,934 ) 236,216 (122,312 ) 90,970 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (2,976 ) (35,301 ) 36,092 (2,185 ) (2,283 ) (708,548 ) (322,966 ) (1,033,797 ) Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (3,298 ) 86,851 (96,446 ) (12,893 ) - - - - Total $ (61,633 ) $ 767,172 (662,695 ) 42,844 $ (47,474 ) $ (1,532,915 ) $ (474,442 ) $ (2,054,831 ) Nine months ended September 30, 2021 and 2020 Nine Months Ended September, 2021 Nine Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (17,925 ) $ 751,780 $ 288,555 $ 1,022,410 $ (29,821 ) $ (771,155 ) $ (19,372 ) $ (820,348 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (349 ) - (349 ) (3,500 ) (95,347 ) 41,225 (57,622 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 497 - 497 (13,005 ) (1,475,050 ) 164,351 (1,323,704 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (27,801 ) 600,555 (1,046,175 ) (473,421 ) (34,000 ) (531,301 ) 217,203 (348,098 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (543 ) 149,331 (126,776 ) 22,012 (1,789 ) (453,267 ) (136,072 ) (591,128 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (11,428 ) (291,804 ) 62,635 (240,597 ) (13,376 ) (1,148,018 ) 156,838 (1,004,556 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (20,639 ) 183,921 41,105 204,387 (9,160 ) 63,905 (13,198 ) 41,547 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - 42,887 42,887 - - (80,092 ) (80,092 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC - 1,384 - 1,384 (7,243 ) (321,982 ) (47,177 ) (376,402 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (83,195 ) 2,059,011 272,659 2,248,475 (54,483 ) 1,758,472 (443,728 ) 1,260,261 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (6,780 ) (824,562 ) 653,714 (177,628 ) (2,283 ) (708,548 ) (322,966 ) (1,033,797 ) Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (7,807 ) 107,810 (88,398 ) 11,605 - - - - Total $ (176,118 ) $ 2,737,574 $ 100,206 $ 2,661,662 $ (168,660 ) $ (3,682,291 ) $ (482,988 ) $ (4,333,939 ) The Trust’s investments in private investment companies have certain redemption and liquidity restrictions which are described in the following table: Redemptions Redemptions Liquidity Notice Period Permitted Restrictions Frontier Funds Multi-Strategy Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None

Transactions with Affiliates

Transactions with Affiliates	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Transactions with Affiliates [Line Items]
Transactions with Affiliates	6. Transactions with Affiliates The Managing Owner contributes funds to the Trust, with respect to the Series, in order to have a 1% interest (“Minimum Purchase Commitment”) in the aggregate capital, profits and losses of all Series and in return will receive units designated as general units in the Series in which the Managing Owner invests such funds. The general units may only be purchased by the Managing Owner and may be subject to no management fees or management fees at reduced rates. Otherwise, the general units hold the same rights as the limited units. The Managing Owner will make contributions to the Series of the Trust necessary to maintain at least a 1% interest in the aggregate capital, profits and losses of the combined Series of the Trust. Such contribution was made by the Managing Owner before trading commenced for the Trust and will be maintained throughout the existence of the Trust, and the Managing Owner will make such purchases as are necessary to effect this requirement. Additionally, the Managing Owner agreed with certain regulatory bodies to maintain a 1% interest specifically in the Frontier Balanced Fund Class 1AP and 2a Units, aggregated, and each of the Frontier Long/Short Commodity Fund, Frontier Diversified Fund and Frontier Masters Fund. The 1% interest in these specific Series is included in computing the Minimum Purchase Commitment in aggregate capital. In addition to the general units the Managing Owner receives in respect of its Minimum Purchase Commitment, the Managing Owner may purchase limited units in any Series as a Limited Owner. Principals of the Managing Owner or affiliates are allowed to own beneficial interests in the Trust, with respect to the Series, as well. All Units purchased by the Managing Owner are held for investment purposes only and not for resale. The Managing Owner may make purchases or redemptions at any time on the same terms as any Limited Owner. The Trust has and will continue to have certain relationships with the Managing Owner and its affiliates. Expenses Management Fees— As of the date of this report, for a Series that was invested in a swap, a Trading Advisor did not receive any management fees directly from the Series for such swap, and instead the relevant Trading Advisor received compensation via the fees embedded in the swap. For the year ended December 31, 2020, the management fee embedded in (i) swaps owned by Frontier Diversified Fund was 1.00% per annum, (ii) swaps owned by Frontier Balanced Fund was 1.00% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 1.50% per annum, (iv) swaps owned by Frontier Select Fund was 1.00% per annum, and (v) swaps owned by Frontier Heritage Fund was 1.00% per annum, and the Managing Owner waived the entire management fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded management fee was accrued on the relevant notional amount of the swap. The management fee as a percentage of the applicable Series’ notional assets will be greater than the percentage of the applicable Series’ net asset value to the extent that the notional assets of the Series exceeds its net asset value. The Managing Owner expects that the notional assets of each Series will generally be maintained at a level in excess of the net asset value of such Series and such excess may be substantial to the extent the Managing Owner deems necessary to achieve the desired level of volatility. Trading Fees— Incentive Fees— Service Fees— Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents. The Managing Owner has determined that the purchase of additional units of the relevant series will commence in 2021. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $22,650, $393, $31,725, $363,825, $20,766, $157,782 and $68,076 for the Frontier Diversified, Long/Short Commodity, Masters, Balanced, Select, Global and Heritage Funds, respectively, as of September 30, 2021. The following table summarizes fees earned by the Managing Owner for the three and nine months ended September 30, 2021 and September 30, 2020, respectively. Three Months Ended September 30, 2021 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 310 $ 29,513 Frontier Masters Fund - - 135 12,339 Frontier Long/Short Commodity Fund - - 58 10,055 Frontier Balanced Fund 54,924 4,764 62,976 108,142 Frontier Select Fund - - 11,949 12,176 Frontier Global Fund - - 17,993 34,334 Frontier Heritage Fund - - 16,886 25,399 Three Months Ended September 30, 2020 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 2,062 $ 50,536 Frontier Masters Fund - - 407 21,879 Frontier Long/Short Commodity Fund - - 108 7,777 Frontier Balanced Fund - 5,029 73,754 127,677 Frontier Select Fund - - 13,025 10,391 Frontier Global Fund - - 22,977 42,481 Frontier Heritage Fund - - 15,845 25,094 Nine Months Ended September 30, 2021 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 1,860 $ 97,487 Frontier Masters Fund - - 492 40,507 Frontier Long/Short Commodity Fund - - 170 28,870 Frontier Balanced Fund 104,764 13,978 195,972 332,131 Frontier Select Fund - - 35,191 35,541 Frontier Global Fund - - 58,383 106,684 Frontier Heritage Fund - - 50,788 75,071 Nine Months Ended September 30, 2020 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 12,712 $ 208,221 Frontier Masters Fund - - 1,501 83,524 Frontier Long/Short Commodity Fund - - 330 25,089 Frontier Balanced Fund - 14,753 284,736 465,170 Frontier Select Fund - - 51,117 42,791 Frontier Global Fund - - 81,204 150,154 Frontier Heritage Fund - - 51,802 83,036 The following table summarizes fees payable to the Managing Owner as of September 30, 2021 and December 31, 2020. As of September 30, 2021 Incentive Management Interest Service Trading Frontier Diversified Fund $ - $ - $ - $ 85 $ 9,894 Frontier Masters Fund - - - 44 4,220 Frontier Long/Short Commodity Fund - - 37 19 3,295 Frontier Balanced Fund 54,924 1,610 1,063 18,384 35,169 Frontier Select Fund - - 249 3,698 4,003 Frontier Global Fund - - 261 5,525 10,585 Frontier Heritage Fund - - 368 5,050 8,117 As of December 31, 2020 Incentive Management Interest Service Trading Frontier Diversified Fund $ - $ - $ - $ 385 $ 12,576 Frontier Masters Fund - - - 70 5,460 Frontier Long/Short Commodity Fund - - 87 18 2,281 Frontier Balanced Fund - 8,854 1,376 21,381 37,894 Frontier Select Fund - - 179 3,709 3,933 Frontier Global Fund - - 326 6,348 11,849 Frontier Heritage Fund - - 139 4,794 7,705 With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed therefore by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk and the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) of average net assets less any fair market value related to swaps is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. Frontier Masters Fund Class 1 was closed as of April 1, 2021 and Frontier Diversified Fund Class 1 was closed as of July 21, 2021. All swaps were sold as of December 31, 2020. The following table outlines the interest paid by each series to the Managing owner and its ratio to average net assets for the three and nine months ended September 30, 2021 and 2020. Three Months Ended September 30, September 30, September 30, September 30, Gross Amount Gross Amount Ratio to Average Ratio to Average Frontier Long/Short Commodity Fund Class 2 4 6 0.01 % 0.02 % Frontier Long/Short Commodity Fund Class 3 111 158 0.01 % 0.02 % Frontier Balanced Fund Class 1 3,661 1,019 0.04 % 0.01 % Frontier Balanced Fund Class 1AP 48 16 0.05 % 0.01 % Frontier Balanced Fund Class 2 738 215 0.04 % 0.01 % Frontier Balanced Fund Class 2a 7 2 0.01 % 0.00 % Frontier Balanced Fund Class 3a 45 11 0.01 % 0.00 % Frontier Select Fund Class 1 640 1,349 0.04 % 0.08 % Frontier Select Fund Class 1AP 4 8 0.04 % 0.08 % Frontier Select Fund Class 2 32 54 0.04 % 0.08 % Frontier Global Fund Class 1 388 901 0.02 % 0.03 % Frontier Global Fund Class 1AP - 9 0.00 % 0.03 % Frontier Global Fund Class 2 31 57 0.02 % 0.03 % Frontier Heritage Fund Class 1 660 1,151 0.03 % 0.05 % Frontier Heritage Fund Class 1AP 2 4 0.02 % 0.05 % Frontier Heritage Fund Class 2 69 235 0.03 % 0.06 % Total $ 6,440 $ 5,195 Nine months ended September 30, September 30, September 30, September 30, Gross Amount Gross Amount Ratio to Average Ratio to Average Frontier Long/Short Commodity Fund Class 2 18 14 0.05 % 0.04 % Frontier Long/Short Commodity Fund Class 3 518 354 0.05 % 0.04 % Frontier Balanced Fund Class 1 7,208 5,419 0.08 % 0.04 % Frontier Balanced Fund Class 1AP 96 79 0.09 % 0.04 % Frontier Balanced Fund Class 2 1,456 1,074 0.08 % 0.04 % Frontier Balanced Fund Class 2a 14 12 0.02 % 0.01 % Frontier Balanced Fund Class 3a 87 58 0.02 % 0.01 % Frontier Select Fund Class 1 2,208 3,081 0.14 % 0.14 % Frontier Select Fund Class 1AP 15 15 0.14 % 0.14 % Frontier Select Fund Class 2 104 112 0.14 % 0.14 % Frontier Global Fund Class 1 2,492 2,649 0.10 % 0.07 % Frontier Global Fund Class 1AP - 24 0.00 % 0.07 % Frontier Global Fund Class 2 183 208 0.09 % 0.07 % Frontier Heritage Fund Class 1 2,708 2,800 0.12 % 0.12 % Frontier Heritage Fund Class 1AP 10 11 0.12 % 0.12 % Frontier Heritage Fund Class 2 277 623 0.12 % 0.12 % Total $ 17,394 $ 16,533
Frontier Funds [Member]
Transactions with Affiliates [Line Items]
Transactions with Affiliates	6. Transactions with Affiliates The Managing Owner contributes funds to the Trust in order to have a 1% interest in the aggregate capital, profits and losses and in return will receive units designated as general units in the Series of the Trust in which the Managing Owner invests such funds. The general units may only be purchased by the Managing Owner and may be subject to no advisory fees or management advisory fees at reduced rates. Otherwise, the general units hold the same rights as the limited units. The Managing Owner is required to maintain at least a 1% interest (“Minimum Purchase Commitment”) in the aggregate capital, profits and losses of the Trust so long as it is acting as the Managing Owner of the Trust. Such contribution was made by the Managing Owner before trading commenced for the Trust and will be maintained throughout the existence of the Trust, and the Managing Owner will make such purchases as are necessary to effect this requirement. Additionally, the Managing Owner agreed with certain regulatory bodies to maintain a 1% interest specifically in the Frontier Balanced Fund Class 1AP Units and Frontier Balanced Fund Class 2a Units, aggregated, and each of the Frontier Long/Short Commodity Fund, Frontier Diversified Fund, and Frontier Masters Fund. The 1% interest in these specific Series of the Trust is included in computing the Minimum Purchase Commitment in aggregate capital. In addition to the general units the Managing Owner receives in respect of its Minimum Purchase Commitment, the Managing Owner may purchase limited units in any Series as a Limited Owner. Principals of the Managing Owner or affiliates are allowed to own beneficial interests in the Trust, as well. All units purchased by the Managing Owner are held for investment purposes only and not for resale. The Managing Owner may make purchases or redemptions at any time on the same terms as any Limited Owner. The Trust has and will continue to have certain relationships with the Managing Owner and its affiliates. Expenses Management Fees— The management fee as a percentage of the applicable Series’ notional assets will be greater than the percentage of the applicable Series’ net asset value to the extent that the notional assets of the Series exceeds its net asset value. The Managing Owner expects that the notional assets of each Series will generally be maintained at a level in excess of the net asset value of such Series and such excess may be substantial to the extent the Managing Owner deems necessary to achieve the desired level of volatility. Trading Fees— Incentive Fees— It is therefore possible that in any given period the Series may pay incentive fees to the Managing Owner for one or more Trading Advisors while each of these Series as a whole experiences losses. The incentive fee is 25% for the Frontier Balanced Fund and the Frontier Diversified Fund and 20% for the Frontier Global Fund, Frontier Heritage Fund, Frontier Select Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund. The Managing Owner may pay all or a portion of such incentive fees to the Trading Advisor(s) for such Series. As of the date of this report, for a Series that was invested in a swap, the Managing Owner or Trading Advisor(s) did not receive any incentive fees directly from the Series for such swap, and instead the relevant Trading Advisor received compensation via the fees embedded in the swap. As of December 31, 2020, the range of incentive fees as a percentage of net new trading profits on swaps embedded in (i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap. Service Fees— As of September 30, 2021, the Trust had a payable to the Managing Owner in the amounts of $54,924, $1,610, $1,978, $75,283 and $32,805 for incentive fees, management fees, interest, trading fees, and service fees, respectively. As of December 31, 2020, the Trust had a payable to the Managing Owner in the amounts of $0, $8,854, $2,107, $81,698, and $36,705 for incentive fees, management fees, interest, trading fees, and service fees, respectively. For the three months ended September 30, 2021, the Managing Owner earned $54,924, $4,764, $1,429, $110,307 and $231,958 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the three months ended September 30, 2020, the Managing Owner earned $0, $5,029, $1,509, $128,178 and $285,835 for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the nine months ended September 30, 2021, the Managing Owner earned $104,764, 13,978, 4,193, 342,856, and $716,291, for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. For the nine months ended September 30, 2020, the Managing Owner earned $0, $14,753, $4,426, $483,402, and $1,057,985, for incentive fees, management fees, risk analysis fees, service fees, and trading fees, respectively. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed therefore by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months. Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (for the three months ended September 30, 2021, and September 30, 2020 amounts received or receivable from the Managing Owner for the difference in monthly service fees from the prepaid initial service fees Class 1a, Class 2a and Class 3a), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. During the three months ended September 30, 2021 and September 30, 2020 and, the Trust paid $6,809, and $5,196, respectively of such interest income to the Managing Owner. Such amounts are not included in the consolidated statements of operations of the Trust. All other interest income is recorded by the Trust on the consolidated statements of operations.

Financial Highlights

Financial Highlights	9 Months Ended
	Sep. 30, 2021
The Series of the Frontier Funds [Member]
Financial Highlights [Line Items]
Financial Highlights	7. Financial Highlights The following information presents the financial highlights of the Series, for the three and nine months ended September 30, 2021 and 2020. This data has been derived from the information presented in the financial statements. For the three months ended September 30, 2021 Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, June 30, 2021 $ 77.68 $ 95.90 $ 89.95 $ - $ 73.52 $ 69.23 $ 98.49 $ 63.74 $ 103.32 $ 67.36 Net operating results: Interest income 0.03 0.03 0.03 - 0.05 0.05 0.04 0.03 0.05 0.03 Expenses (1.30 ) (0.87 ) (0.81 ) - (1.10 ) (1.09 ) (0.71 ) (0.46 ) (0.74 ) (0.49 ) Net gain/(loss) on investments, net of non-controlling interests (76.41 ) (4.08 ) (3.77 ) - * 2.63 2.57 1.27 1.04 1.33 1.14 Net income/(loss) (77.68 ) (4.91 ) (4.56 ) - * 1.58 1.53 0.60 0.61 0.63 0.68 Net asset value, September 30, 2021 $ - $ 90.99 $ 85.39 $ - * $ 75.10 $ 70.76 $ 99.09 $ 64.35 $ 103.95 $ 68.04 Ratios to average net assets Net investment income/(loss) -6.53 % -3.45 % -3.45 % 0.00 % -5.88 % -5.88 % -2.67 % -2.67 % -2.67 % -2.67 % Expenses before incentive fees (3)(4) 6.67 % 3.60 % 3.60 % 0.00 % 6.17 % 6.17 % 2.85 % 2.85 % 2.85 % 2.85 % Expenses after incentive fees (3)(4) 6.67 % 3.60 % 3.60 % 0.00 % 6.17 % 6.17 % 2.85 % 2.85 % 2.85 % 2.85 % Total return before incentive fees (2) -1.71 %* -5.12 % -5.07 % 0.00 %* 2.15 % 2.21 % 0.61 % 0.96 % 0.61 % 1.01 % Total return after incentive fees (2) -1.71 %* -5.12 % -5.07 % 0.00 %* 2.15 % 2.21 % 0.61 % 0.96 % 0.61 % 1.01 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2021 $ 85.86 $ 105.55 $ 142.34 $ 123.47 $ 123.05 $ 66.17 $ 81.44 $ 108.07 Net operating results: Interest income 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 Expenses (2.03 ) (1.70 ) (46.17 ) (1.99 ) (1.98 ) (1.03 ) (0.62 ) (0.83 ) Net gain/(loss) on investments, net of non-controlling interests 0.79 0.96 45.15 1.17 1.16 2.18 2.66 3.52 Net income/(loss) (1.24 ) (0.73 ) (1.00 ) (0.82 ) (0.82 ) 1.15 2.03 2.70 Net asset value, September 30, 2021 $ 84.62 $ 104.82 $ 141.34 $ 122.65 $ 122.23 $ 67.32 $ 83.47 $ 110.77 Ratios to average net assets Net investment income/(loss) -7.75 % -4.75 % -4.75 % -4.75 % -4.75 % -5.89 % -2.89 % -2.89 % Expenses before incentive fees (3)(4) 7.24 % 4.24 % 4.24 % 4.24 % 4.24 % 5.89 % 2.89 % 2.89 % Expenses after incentive fees (3)(4) 7.75 % 4.75 % 4.75 % 4.75 % 4.75 % 5.89 % 2.89 % 2.89 % Total return before incentive fees (2) -0.93 % -0.18 % -0.19 % -0.15 % -0.15 % 1.73 % 2.49 % 2.49 % Total return after incentive fees (2) -1.45 % -0.70 % -0.70 % -0.66 % -0.67 % 1.73 % 2.49 % 2.49 % Incentive fee per share 0.45 0.55 14.98 0.64 0.64 - - - Incentive Fee to ANA 0.51 % 0.51 % 0.51 % 0.51 % 0.51 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2021 $ 117.28 $ 179.85 $ 109.26 $ 134.44 $ 179.93 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 Expenses (2.33 ) (2.29 ) (1.90 ) (1.45 ) (1.81 ) Net gain/(loss) on investments, net of non-controlling interests 4.61 7.19 4.84 6.12 8.04 Net income/(loss) 2.28 4.90 2.94 4.66 6.24 Net asset value, September 30, 2021 $ 119.56 $ 184.75 $ 112.20 $ 139.10 $ 186.17 Ratios to average net assets Net investment income/(loss) -8.28 % -5.29 % -7.05 % -4.06 % -4.06 % Expenses before incentive fees (3)(4) 8.28 % 5.29 % 7.05 % 4.06 % 4.06 % Expenses after incentive fees (3)(4) 8.28 % 5.29 % 7.05 % 4.06 % 4.06 % Total return before incentive fees (2) 1.95 % 2.72 % 2.69 % 3.47 % 3.47 % Total return after incentive fees (2) 1.95 % 2.72 % 2.69 % 3.47 % 3.47 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. * Class 1 of Frontier Master Fund was closed as of April 1, 2021 and Frontier Diversified Fund Class 1 was closed as of July 21, 2021. For the three months ended September 30, 2020 Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, June 30, 2020 $ 74.09 $ 89.88 $ 84.09 $ 61.92 $ 75.13 $ 70.56 $ 44.58 $ 83.27 $ 53.49 $ 87.35 $ 56.38 Net operating results: Interest income 0.01 0.02 0.02 0.03 0.04 0.04 0.03 0.06 0.04 0.06 0.04 Expenses (1.46 ) (0.76 ) (0.71 ) (3.18 ) (1.05 ) (1.00 ) (0.69 ) (0.50 ) (0.32 ) (0.52 ) (0.34 ) Net gain/(loss) on investments, net of non-controlling interests (6.17 ) (8.14 ) (7.57 ) (6.62 ) (10.57 ) (9.87 ) (43.93 )* (1.42 ) (0.82 ) (1.49 ) 0.82 Net income/(loss) (7.61 ) (8.88 ) (8.26 ) (9.77 ) (11.58 ) (10.83 ) (44.58 )* (1.86 ) (1.11 ) (1.95 ) (1.12 ) Net asset value, September 30, 2020 $ 66.48 $ 81.00 $ 75.83 $ 52.15 $ 63.55 $ 59.73 $ - * $ 81.41 $ 52.39 $ 85.40 $ 55.27 Ratios to average net assets Net investment income/(loss) -8.16 % -3.45 % -3.45 % -21.78 % -5.83 % -5.83 % -6.06 % -2.17 % -2.17 % -2.17 % -2.17 % Expenses before incentive fees (3)(4) 8.24 % 3.53 % 3.53 % 22.02 % 6.06 % 6.06 % 6.34 % 2.45 % 2.45 % 2.45 % 2.45 % Expenses after incentive fees (3)(4) 8.24 % 3.53 % 3.53 % 22.02 % 6.06 % 6.06 % 6.34 % 2.45 % 2.45 % 2.45 % 2.45 % Total return before incentive fees (2) -10.28 % -9.88 % -9.83 % -15.78 % -15.41 % -15.35 % -2.46 %* -2.23 % -2.07 % -2.23 % -1.98 % Total return after incentive fees (2) -10.28 % -9.88 % -9.83 % -15.78 % -15.41 % -15.35 % -2.46 %* -2.23 % -2.07 % -2.23 % -1.98 % Incentive fee per share - - - - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2020 $ 78.59 $ 93.76 $ 126.44 $ 109.61 $ 109.24 $ 61.04 $ 72.91 $ 96.75 Net operating results: Interest income 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 Expenses (1.39 ) (0.97 ) (20.94 ) (1.13 ) (1.13 ) (0.78 ) (0.41 ) (0.54 ) Net gain/(loss) on investments, net of non-controlling interests (5.38 ) (6.46 ) 10.92 (7.58 ) (7.51 ) (6.91 ) (8.30 ) (11.01 ) Net income/(loss) (6.77 ) (7.42 ) (10.02 ) (8.71 ) (8.64 ) (7.69 ) (8.70 ) (11.55 ) Net asset value, September 30, 2020 $ 71.82 $ 86.34 $ 116.42 $ 100.90 $ 100.60 $ 53.35 $ 64.20 $ 85.20 Ratios to average net assets Net investment income/(loss) -7.30 % -4.27 % -4.27 % -4.27 % -4.27 % -5.35 % -2.32 % -2.32 % Expenses before incentive fees (3)(4) 7.31 % 4.27 % 4.27 % 4.27 % 4.27 % 5.35 % 2.32 % 2.32 % Expenses after incentive fees (3)(4) 7.31 % 4.27 % 4.27 % 4.27 % 4.27 % 5.35 % 2.32 % 2.32 % Total return before incentive fees (2) -8.61 % -7.92 % -7.92 % -7.95 % -7.91 % -12.60 % -11.93 % -11.93 % Total return after incentive fees (2) -8.61 % -7.92 % -7.92 % -7.95 % -7.91 % -12.60 % -11.93 % -11.93 % Incentive fee per share - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2020 $ 121.68 $ 145.35 $ 181.09 $ 96.51 $ 115.25 $ 154.24 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (2.33 ) (1.77 ) (2.20 ) (1.62 ) (1.10 ) (1.49 ) Net gain/(loss) on investments, net of non-controlling interests (15.17 ) (18.19 ) (22.67 ) (8.01 ) (9.62 ) (12.85 ) Net income/(loss) (17.50 ) (19.96 ) (24.87 ) (9.63 ) (10.72 ) (14.34 ) Net asset value, September 30, 2020 $ 104.18 $ 125.39 $ 156.22 $ 86.88 $ 104.53 $ 139.90 Ratios to average net assets Net investment income/(loss) -8.26 % -5.23 % -5.23 % -7.04 % -4.01 % -4.01 % Expenses before incentive fees (3)(4) 8.26 % 5.23 % 5.23 % 7.04 % 4.01 % 4.01 % Expenses after incentive fees (3)(4) 8.26 % 5.23 % 5.23 % 7.04 % 4.01 % 4.01 % Total return before incentive fees (2) -14.38 % -13.73 % -13.74 % -9.98 % -9.30 % -9.29 % Total return after incentive fees (2) -14.38 % -13.73 % -13.74 % -9.98 % -9.30 % -9.29 % Incentive fee per share - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. * Class 1a of Frontier Long/Short Commodity Fund was liquidated as of September 30, 2020. For the nine months ended September 30, 2021 Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2020 $ 72.68 $ 88.95 $ 83.33 $ 55.18 $ 67.54 $ 63.52 $ 85.99 $ 55.29 $ 90.21 $ 58.37 Net operating results: Interest income 0.06 0.07 0.07 0.15 0.20 0.19 0.20 0.13 0.21 0.14 Expenses (3.52 ) (2.49 ) (2.39 ) (5.34 ) (3.37 ) (3.16 ) (2.03 ) (1.28 ) (2.10 ) (1.36 ) Net gain/(loss) on investments, net of non-controlling interests (69.21 )* 4.46 4.38 (49.99 )* 10.73 10.21 14.92 10.22 15.63 10.89 Net income/(loss) (72.68 )* 2.04 2.06 (55.18 )* 7.56 7.24 13.10 9.06 13.74 9.67 Net asset value, September 30, 2021 $ - * $ 90.99 $ 85.39 $ - * $ 75.10 $ 70.76 $ 99.09 $ 64.35 $ 103.95 $ 68.04 Ratios to average net assets Net investment income/(loss) -8.89 % -5.12 % -5.12 % -18.61 % -8.50 % -8.50 % -3.80 % -3.80 % -3.80 % -3.80 % Expenses before incentive fees (3)(4) 9.04 % 5.27 % 5.27 % 19.14 % 9.03 % 9.03 % 4.22 % 4.22 % 4.22 % 4.22 % Expenses after incentive fees (3)(4) 9.04 % 5.27 % 5.27 % 19.14 % 9.03 % 9.03 % 4.22 % 4.22 % 4.22 % 4.22 % Total return before incentive fees (2) 5.06 %* 2.29 % 2.48 % 4.59 %* 11.19 % 11.39 % 15.24 % 16.39 % 15.23 % 16.57 % Total return after incentive fees (2) 5.06 %* 2.29 % 2.48 % 4.59 %* 11.19 % 11.39 % 15.24 % 16.39 % 15.23 % 16.57 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2020 $ 79.93 $ 96.81 $ 130.54 $ 113.20 $ 112.81 $ 58.55 $ 70.99 $ 94.20 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (5.36 ) (4.24 ) (5.68 ) (5.25 ) (4.83 ) (2.85 ) (1.67 ) (2.22 ) Net gain/(loss) on investments, net of non-controlling interests 10.04 12.24 16.48 14.69 14.25 11.62 14.15 18.78 Net income/(loss) 4.69 8.01 10.80 9.45 9.42 8.77 12.48 16.57 Net asset value, September 30, 2021 $ 84.62 $ 104.82 $ 141.34 $ 122.65 $ 122.23 $ 67.32 $ 83.47 $ 110.77 Ratios to average net assets Net investment income/(loss) -11.56 % -7.12 % -7.12 % -7.12 % -7.12 % -8.94 % -4.38 % -4.38 % Expenses before incentive fees (3)(4) 10.65 % 6.21 % 6.21 % 6.21 % 6.21 % 8.94 % 4.38 % 4.38 % Expenses after incentive fees (3)(4) 11.57 % 7.13 % 7.13 % 7.13 % 7.13 % 8.94 % 4.38 % 4.38 % Total return before incentive fees (2) 6.78 % 9.19 % 9.19 % 9.27 % 9.27 % 14.97 % 17.58 % 17.59 % Total return after incentive fees (2) 5.87 % 8.27 % 8.28 % 8.35 % 8.35 % 14.97 % 17.58 % 17.59 % Incentive fee per share 0.79 0.98 1.31 1.21 1.11 - - - Incentive Fee to ANA 0.92 % 0.92 % 0.92 % 0.92 % 0.92 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2020 $ 110.90 $ 167.56 $ 96.10 $ 116.50 $ 155.92 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 Expenses (6.99 ) (6.57 ) (5.57 ) (3.91 ) (5.18 ) Net gain/(loss) on investments, net of non-controlling interests 15.65 23.76 21.67 26.52 35.42 Net income/(loss) 8.66 17.19 16.10 22.60 30.25 Net asset value, September 30, 2021 $ 119.56 $ 184.75 $ 112.20 $ 139.10 $ 186.17 Ratios to average net assets Net investment income/(loss) -11.77 % -7.42 % -10.56 % -6.04 % -6.04 % Expenses before incentive fees (3)(4) 11.77 % 7.42 % 10.56 % 6.04 % 6.04 % Expenses after incentive fees (3)(4) 11.77 % 7.42 % 10.56 % 6.04 % 6.04 % Total return before incentive fees (2) 7.81 % 10.26 % 16.75 % 19.40 % 19.40 % Total return after incentive fees (2) 7.81 % 10.26 % 16.75 % 19.40 % 19.40 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. * Class 1 of Frontier Masters Fund was closed as of April 1, 2021. Frontier Diversified Fund Class 1 was closed as of July 21, 2021. For the nine months ended September 30, 2020 Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2019 $ 101.10 $ 121.58 $ 113.61 $ 72.28 $ 87.18 $ 81.78 $ 44.20 $ 81.60 $ 52.55 $ 85.64 $ 55.31 Net operating results: Interest income 0.02 0.03 0.02 0.08 0.10 0.10 0.07 0.13 0.08 0.13 0.09 Expenses (4.88 ) (2.82 ) (2.50 ) (11.57 ) (3.75 ) (3.52 ) (2.13 ) (1.59 ) (1.02 ) (1.67 ) (1.08 ) Net gain/(loss) on investments, net of non-controlling interests (29.76 ) (37.79 ) (35.30 ) (8.64 ) (19.99 ) (18.63 ) (42.14 )* 1.27 0.78 1.30 0.94 Net income/(loss) (34.62 ) (40.58 ) (37.78 ) (20.13 ) (23.63 ) (22.05 ) (44.20 )* (0.19 ) (0.17 ) (0.24 ) (0.05 ) Net asset value, September 30, 2020 $ 66.48 $ 81.00 $ 75.83 $ 52.15 $ 63.55 $ 59.73 $ - * $ 81.41 $ 52.39 $ 85.40 $ 55.27 Ratios to average net assets Net investment income/(loss) -10.89 % -5.35 % -5.35 % -35.07 % -9.11 % -9.11 % -9.27 % -3.53 % -3.53 % -3.53 % -3.53 % Expenses before incentive fees (3)(4) 10.94 % 5.40 % 5.40 % 35.33 % 9.37 % 9.37 % 9.58 % 3.84 % 3.84 % 3.84 % 3.84 % Expenses after incentive fees (3)(4) 10.94 % 5.40 % 5.40 % 35.33 % 9.37 % 9.37 % 9.58 % 3.84 % 3.84 % 3.84 % 3.84 % Total return before incentive fees (2) -34.25 % -33.38 % -33.25 % -27.85 % -27.11 % -26.97 % -1.62 %* -0.23 % -0.31 % -0.28 % -0.08 % Total return after incentive fees (2) -34.25 % -33.38 % -33.25 % -27.85 % -27.11 % -26.97 % -1.62 %* -0.23 % -0.31 % -0.28 % -0.08 % Incentive fee per share - - - - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2019 $ 117.23 $ 137.81 $ 185.82 $ 161.04 $ 160.50 $ 66.56 $ 78.51 $ 103.94 Net operating results: Interest income 0.04 0.04 0.06 0.05 0.05 0.00 0.00 0.00 Expenses (4.79 ) (3.21 ) (4.34 ) (3.79 ) (3.76 ) (2.61 ) (1.37 ) (1.83 ) Net gain/(loss) on investments, net of non-controlling interests (40.66 ) (48.31 ) (65.11 ) (56.40 ) (56.20 ) (10.60 ) (12.93 ) (16.92 ) Net income/(loss) (45.41 ) (51.47 ) (69.40 ) (60.14 ) (59.90 ) (13.21 ) (14.31 ) (18.74 ) Net asset value, September 30, 2020 $ 71.82 $ 86.34 $ 116.42 $ 100.90 $ 100.60 $ 53.35 $ 64.20 $ 85.20 Ratios to average net assets Net investment income/(loss) -10.42 % -5.92 % -5.92 % -5.92 % -5.92 % -8.15 % -3.64 % -3.64 % Expenses before incentive fees (3)(4) 10.50 % 6.00 % 6.00 % 6.00 % 6.00 % 8.15 % 3.64 % 3.64 % Expenses after incentive fees (3)(4) 10.50 % 6.00 % 6.00 % 6.00 % 6.00 % 8.15 % 3.64 % 3.64 % Total return before incentive fees (2) -38.74 % -37.35 % -37.35 % -37.34 % -37.32 % -19.84 % -18.22 % -18.03 % Total return after incentive fees (2) -38.74 % -37.35 % -37.35 % -37.34 % -37.32 % -19.84 % -18.22 % -18.03 % Incentive fee per share - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2019 $ 131.52 $ 154.43 $ 192.82 $ 97.54 $ 114.15 $ 153.59 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (7.81 ) (5.84 ) (7.38 ) (5.22 ) (3.52 ) (4.74 ) Net gain/(loss) on investments, net of non-controlling interests (19.53 ) (23.20 ) (29.22 ) (5.44 ) (6.11 ) (8.95 ) Net income/(loss) (27.34 ) (29.04 ) (36.60 ) (10.65 ) (9.62 ) (13.69 ) Net asset value, September 30, 2020 $ 104.18 $ 125.39 $ 156.22 $ 86.88 $ 104.53 $ 139.90 Ratios to average net assets Net investment income/(loss) -12.20 % -7.68 % -7.68 % -10.42 % -5.90 % -5.90 % Expenses before incentive fees (3)(4) 12.20 % 7.68 % 7.68 % 10.42 % 5.90 % 5.90 % Expenses after incentive fees (3)(4) 12.20 % 7.68 % 7.68 % 10.42 % 5.90 % 5.90 % Total return before incentive fees (2) -20.79 % -18.80 % -18.98 % -10.92 % -8.43 % -8.91 % Total return after incentive fees (2) -20.79 % -18.80 % -18.98 % -10.92 % -8.43 % -8.91 % Incentive fee per share - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % (1) Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information. (2) Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6. (4) Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return. * Class 1a of Frontier Long/Short Commodity Fund was liquidated as of September 30, 2020.
Frontier Funds [Member]
Financial Highlights [Line Items]
Financial Highlights	7. Financial Highlights The following information presents the financial highlights of the Trust for the nine months and three months ended September 30, 2021 and September 30, 2020. This data has been derived from the information presented in the consolidated financial statements. Three months ended September 30 2021 2020 Ratios to average net assets (1) Net investment income/(loss) (1) -6.27 % -5.84 % Expenses before incentive fees (3) 6.07 % -5.88 % Expenses after incentive fees (3) 6.32 % -5.88 % Total return before incentive fees (2) -0.29 % -10.08 % Total return after incentive fees (2) -0.53 % -10.08 % Nine months ended September 30 2021 2020 Ratios to average net assets (1) Net investment income/(loss) (1) -6.43 % -5.70 % Expenses before incentive fees (3) 6.04 % -5.69 % Expenses after incentive fees (3) 6.47 % -5.74 % Total return before incentive fees (2) 8.81 % -36.52 % Total return after incentive fees (2) 8.37 % -36.56 % (1) Annualized with the exception of incentive fees. (2) Total returns are not annualized. (3) Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5. The Trust financial highlights are calculated based upon the Trust’s consolidated financial statements. The consolidated Trust does not issue units and therefore the financial highlights do not disclose any unitized data.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Derivative Instruments and Hedging Activities [Line Items]
Derivative Instruments and Hedging Activities	8. Derivative Instruments and Hedging Activities The Series’ primary business is to engage in speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts). The Series do not enter into or hold positions for hedging purposes as defined under ASC 815, Derivatives and Hedging (“ASC 815”). The detail of the fair value of the Series’ derivatives by instrument types as of September 30, 2021 and December 31, 2020 is included in the Condensed Schedules of Investments. See Note 4 for further disclosure related to each Series’ position in swap contracts. The following tables summarize the monthly averages of futures contracts bought and sold for each respective Series of the Trust: For the three months ended September 30, 2021 Monthly average contracts: Bought Sold Frontier Balanced Fund 307 392 For the three months ended September 30, 2020 Monthly average contracts: Bought Sold Frontier Balanced Fund 600 726 For the nine months ended September 30, 2021 Monthly average contracts: Bought Sold Frontier Balanced Fund 293 322 For the nine Months ended September 30, 2020 Monthly average contracts: Bought Sold Frontier Balanced Fund 578 568 The following tables summarize the trading revenues for the three and nine months ended September 30, 2021, and 2020 by sector: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2021 Type of contract Frontier Balanced Fund Agriculturals $ 13,487 Currencies (20,259 ) Energies 82,010 Interest rates 5,987 Metals 155 Stock indices 12,503 Realized trading income/(loss) (1) $ 93,883 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2020 Type of contract Frontier Balanced Fund Agriculturals $ 107,606 Currencies 36,116 Energies (29,190 ) Interest rates (80,947 ) Metals 105,688 Stock indices 28,280 Realized trading income/(loss) (1) $ 167,553 (1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures forwards and options. Realized Trading Revenue from Futures, Forwards and Options for the Nine Months Ended September 30, 2021 Type of contract Frontier Balanced Fund Agriculturals $ 87,183 Currencies (75,797 ) Energies 133,440 Interest rates 127,666 Metals 88,709 Stock indices 213,404 Realized trading income/(loss) (1) $ 574,605 Realized Trading Revenue from Futures, Forwards and Options for the Nine Months Ended September 30, 2020 Type of contract Frontier Balanced Fund Agriculturals $ 132,659 Currencies 15,372 Energies (15,120 ) Interest rates 56,888 Metals 427,135 Stock indices (28,822 ) Realized trading income/(loss) (1) $ 588,112 (1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures forwards and options. Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended September 30, 2021 Type of contract Frontier Balanced Fund Agriculturals $ 62,335 Currencies 8,416 Energies 22,030 Interest rates (1,144 ) Metals 72,161 Stock indices (10,502 ) Change in unrealized trading income/(loss) (1) $ 153,295 Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended September 30, 2020 Type of contract Frontier Balanced Fund Agriculturals $ (73,529 ) Currencies (12,856 ) Energies (35,050 ) Interest rates 46,611 Metals 28,731 Stock indices (7,741 ) Change in unrealized trading income/(loss) (1) $ (53,834 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Nine Months Ended September 30, 2021 Type of contract Frontier Balanced Fund Agriculturals $ 34,336 Currencies (89,833 ) Energies 35,930 Interest rates (13,046 ) Metals 30,003 Stock indices (14,058 ) Change in unrealized trading income/(loss) (1) $ (16,668 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit) Net Change in Open Trade Equity from Futures, Forwards and Options for the Nine Months Ended September 30, 2020 Type of contract Frontier Balanced Fund Agriculturals $ (58,614 ) Currencies (27,439 ) Energies (39,325 ) Interest rates 76,647 Metals (91,914 ) Stock indices 9,775 Change in unrealized trading income/(loss) (1) $ (130,870 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit) Certain financial instruments and derivative instruments are eligible for offset in the statements of financial condition under GAAP. The Series’ open trade equity/(deficit), options written, and receivables from FCMs are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. The Series’ policy is to recognize amounts subject to master netting arrangements on a net basis on the statements of financial condition. The following tables present gross and net information about the Series’ assets and liabilities subject to master netting arrangements as disclosed on the statements of financial condition as of September 30, 2021 and December 31, 2020. As of September 30, 2021 Frontier Balanced Fund Gross Gross Net Open Trade Equity/(Deficit) $ 1,246,031 $ (1,161,702 ) $ 84,329 As of December 31, 2020 Frontier Balanced Fund Gross Gross Net Open Trade Equity/(Deficit) $ 814,743 $ (714,303 ) $ 100,440
Frontier Funds [Member]
Derivative Instruments and Hedging Activities [Line Items]
Derivative Instruments and Hedging Activities	8. Derivative Instruments and Hedging Activities The Trust’s primary business is to engage in speculative trading of a diversified portfolio of futures, forwards (including interbank foreign currencies), options contracts and other derivative instruments (including swap contracts). The Trust does not enter into or hold positions for hedging purposes as defined under ASC 815. The detail of the fair value of the Trust’s derivatives by instrument types as of September 30, 2021 and December 31, 2020 is included in the Consolidated Condensed Schedules of Investments. See Note 4 for further disclosure related to the Trust’s positions in swap contracts. There are embedded management fees in transacting these swaps ranging from 1% to 1.5% based on fair value of swaps and the embedded incentive fees ranging from 15% to 25% based on net new trading profits on swaps. For the three months ended September 30, 2021 and September 30, 2020, the monthly average of futures, forwards and options contracts bought was approximately 307 and 600, respectively and sold was approximately 392 and 726, respectively. For the nine months ended September 30, 2021 and September 30, 2020, the monthly average of futures, forwards and options contracts bought was approximately 293 and 578, respectively and sold was approximately 322 and 568, respectively. The following tables summarize the trading revenues for the three months ended September 30, 2021 and September 30, 2020 by contract type: Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2021 Type of contract Agriculturals $ 13,487 Currencies (20,259 ) Energies 82,010 Interest rates 5,987 Metals 155 Stock indices 12,503 Realized trading income/(loss) (1) $ 93,883 Realized Trading Revenue from Futures, Forwards and Options for the Three Months Ended September 30, 2020 Type of contract Agriculturals $ 107,606 Currencies 36,116 Energies (29,190 ) Interest rates (80,947 ) Metals 105,688 Stock indices 28,280 Realized trading income/(loss) (1) $ 167,553 85 Realized Trading Revenue from Futures, Forwards and Options for the Nine Months Ended September 30, 2021 Type of contract Agriculturals $ 87,183 Currencies (75,797 ) Energies 133,440 Interest rates 127,666 Metals 88,709 Stock indices 213,404 Realized trading income/(loss) (1) $ 574,605 Realized Trading Revenue from Futures, Forwards and Options for the Nine Months Ended September 30, 2020 Type of contract Agriculturals $ 132,659 Currencies 15,372 Energies (15,120 ) Interest rates 56,888 Metals 427,135 Stock indices (28,822 ) Realized trading income/(loss) (1) $ 588,112 (1) Amounts recorded in the Statements of Operations under Net realized gain/(loss) on futures forwards and options. Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended September 30, 2021 Type of contract Agriculturals $ 62,335 Currencies 8,416 Energies 22,030 Interest rates (1,144 ) Metals 72,161 Stock indices (10,502 ) Change in unrealized trading income/(loss) (1) $ 153,295 Net Change in Open Trade Equity from Futures, Forwards and Options for the Three Months Ended September 30, 2020 Type of contract Agriculturals $ (73,529 ) Currencies (12,856 ) Energies (35,050 ) Interest rates 46,611 Metals 28,731 Stock indices (7,741 ) Change in unrealized trading income/(loss) (1) $ (53,834 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Nine Months Ended September 30, 2021 Type of contract Agriculturals $ 34,336 Currencies (89,833 ) Energies 35,930 Interest rates (13,046 ) Metals 30,003 Stock indices (14,058 ) Change in unrealized trading income/(loss) (1) $ (16,668 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Nine Months Ended September 30, 2020 Type of contract Agriculturals $ (58,614 ) Currencies (27,439 ) Energies (39,325 ) Interest rates 76,647 Metals (91,914 ) Stock indices 9,775 Change in unrealized trading income/(loss) (1) $ (130,870 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit) Certain financial instruments and derivative instruments are eligible for offset in the statements of financial condition under GAAP. The Trust’s open trade equity/(deficit), options written, and receivables from FCMs are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. The Trust’s policy is to recognize amounts subject to master netting arrangements on a net basis on the consolidated statements of financial condition. The following tables present gross and net information about the Trust’s assets and liabilities subject the master netting arrangements as disclosed on the consolidated statements of financial condition as of September 30, 2021 and December 31, 2020: As of September 30, 2021 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented Open Trade Equity/(Deficit) $ 1,246,031 $ (1,161,702 ) $ 84,329 As of December 31, 2020 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented Open Trade Equity/(Deficit) $ 814,743 $ (714,303 ) $ 100,440

Trading Activities and Related

Trading Activities and Related Risks	9 Months Ended
	Sep. 30, 2021
The Series of the Frontier Funds [Member]
Trading Activities and Related Risks [Line Items]
Trading Activities and Related Risks	9. Trading Activities and Related Risks The purchase and sale of futures and options on futures contracts require margin deposits with FCMs. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act, as amended (“CEA”), requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. A customer’s cash and other property (for example, U.S. treasury bills) deposited with an FCM are considered commingled with all other customer funds subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the statements of financial condition, may result in future obligation or loss in excess of the amount paid by the Series for a particular investment. Each Trading Company expects to trade in futures, options, forward and swap contracts and will therefore be a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, there exists a market risk that such contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time. In addition to market risk, trading futures, forward and swap contracts entails credit risk that a counterparty will not be able to meet its obligations to a Trading Company or Galaxy Plus entity. The counterparty for futures contracts traded in the United States and on most foreign exchanges is the clearinghouse associated with such exchange. In general, clearinghouses are backed by the corporate members of the clearinghouse who are required to share any financial burden resulting from the non-performance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearinghouse is not backed by the clearing members, like some foreign exchanges, it is normally backed by a consortium of banks or other financial institutions. Some non-U.S. exchanges, in contrast to U.S. exchanges, are principals’ markets in which performance is the responsibility only of the individual counterparty with whom the Trading Company has entered into the transaction, and not of the exchange or clearing corporation. In these kinds of markets, there is risk of bankruptcy or other failure or refusal to perform by the counterparty. In the case of forward contracts traded on the interbank market and swaps, neither is traded on exchanges. The counterparty is generally a single bank or other financial institution, rather than a group of financial institutions; thus there may be a greater counterparty credit risk. The Managing Owner expects the Trading Advisors to trade only with those counterparties which it believes to be creditworthy. All positions of each Trading Company will be valued each day on a mark-to-market basis. There can be no assurance that any clearing member, clearinghouse or other counterparty will be able to meet its obligations to any Trading Company. The Managing Owner has established procedures to actively monitor and minimize market and credit risks. The Limited Owners bear the risk of loss only to the extent of the market value of their respective investments and, in certain specific circumstances, distributions and redemptions received.
Frontier Funds [Member]
Trading Activities and Related Risks [Line Items]
Trading Activities and Related Risks	9. Trading Activities and Related Risks The purchase and sale of futures and options on futures contracts require margin deposits with FCMs. Additional deposits may be necessary for any loss on contract value. The CEA requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. A customer’s cash and other property (for example, U.S. treasury bills) deposited with an FCM are considered commingled with all other customer funds subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the statements of financial condition, may result in future obligation or loss in excess of the amount paid by the Series for a particular investment. Each Trading Company and Galaxy Plus entity expects to trade in futures, options, forward and swap contracts and will therefore be a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, there exists a market risk that such contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin- to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time. In addition to market risk, trading futures, forward and swap contracts entails credit risk that a counterparty will not be able to meet its obligations to a Trading Company or Galaxy Plus entity. The counterparty for futures contracts traded in the United States and on most foreign exchanges is the clearinghouse associated with such exchange. In general, clearinghouses are backed by the corporate members of the clearinghouse who are required to share any financial burden resulting from the non-performance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearinghouse is not backed by the clearing members, like some foreign exchanges, it is normally backed by a consortium of banks or other financial institutions. Some non-U.S. exchanges, in contrast to U.S. exchanges, are principals’ markets in which performance is the responsibility only of the individual counterparty with whom the Trading Company has entered into the transaction, and not of the exchange or clearing corporation. In these kinds of markets, there is risk of bankruptcy or other failure or refusal to perform by the counterparty. In the case of forward contracts traded on the interbank market and swaps, neither is traded on exchanges. The counterparty is generally a single bank or other financial institution, rather than a group of financial institutions; thus there may be a greater counterparty credit risk. The Managing Owner expects the Trading Advisors to trade only with those counterparties which it believes to be creditworthy. All positions of each Trading Company will be valued each day on a mark-to-market basis. There can be no assurance that any clearing member, clearinghouse or other counterparty will be able to meet its obligations to any Trading Company. The Managing Owner has established procedures to actively monitor and minimize market and credit risks. The Limited Owners bear the risk of loss only to the extent of the market value of their respective investments and, in certain specific circumstances, distributions and redemptions received.

Indemnifications and Guarantees

Indemnifications and Guarantees noted in Management Discussion and Analysis	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Indemnifications and Guarantees noted in Management Discussion and Analysis [Line Items]
Indemnifications and Guarantees noted in Management Discussion and Analysis	10. Indemnifications and Guarantees noted in Management Discussion and Analysis The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct. The Trust has had no prior claims or payments pursuant to these agreements. The Trust’s individual maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Trust that have not yet occurred. However, based on experience the Trust expects the risk of loss to be remote. Maximum exposure is unfulfilled obligations of the Series up to the amount of equity at risk with the custodian of the referenced Series as allocated from the Trading Company. The Series have not recorded any liability for the indemnifications in the accompanying financial statements as it expects any possibility of losses to be remote.
Frontier Funds [Member]
Indemnifications and Guarantees noted in Management Discussion and Analysis [Line Items]
Indemnifications and Guarantees noted in Management Discussion and Analysis	10. Indemnifications and Guarantees The Trust has entered into agreements, which provide for the indemnification of futures clearing brokers, and commodity trading advisers, among others, against losses, costs, claims and liabilities arising from the performance of their individual obligations under such agreements, except for gross negligence, bad faith or willful misconduct. The Trust has had no prior claims or payments pursuant to these agreements. The Trust’s individual maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Trust that have not yet occurred. However, based on experience the Trust expects the risk of loss to be remote. Maximum exposure is unfulfilled obligations of the Trust up to the amount of equity at risk with the custodian of the referenced Series, as allocated from the Trading Company. The Trust has not recorded any liability for the guarantees in the accompanying financial statements as it expects any possibility of losses to be remote. The Trust has not recorded any liability for the indemnifications in the accompanying financial statements as it expects any possibility of losses to be remote.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
The Series of the Frontier Funds [Member]
Subsequent Events [Line Items]
Subsequent Events	11. Subsequent Events The Managing Owner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The Managing Owner has assessed the subsequent events through the date that the financial statements were issued and has determined that, except as set forth below, there were no subsequent events requiring adjustment to or disclosure in the financial statements. From October 1, 2021 through November 10, 2021, Frontier Balanced Fund, Frontier Diversified Fund, Frontier Heritage Fund, Frontier Long/Short Commodity Fund, Frontier Masters Fund, Frontier Select Fund and Frontier Global Fund paid $110,778, $19,386, $2,000, $ 1,300, $3,885, $43,866 and, $49,473 respectively, in redemptions.
Frontier Funds [Member]
Subsequent Events [Line Items]
Subsequent Events	11. Subsequent Events The Managing Owner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The Managing Owner has assessed the subsequent events through the date that the financial statements were issued and has determined that, except as set forth below, there were no subsequent events requiring adjustment to or disclosure in the financial statements. From October 1, 2021 through November 10, 2021, the Trust paid $230,687 in redemptions.

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies)	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Accounting Policies, by Policy (Policies) [Line Items]
Basis of Presentation	Basis of Presentation
Consolidation	Consolidation Galaxy Plus entities are co-mingled investment vehicles. In addition to the Series, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series’ ownership percentage in Galaxy Plus entities. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.
Use of Estimates	Use of Estimates—
Cash and Cash Equivalents	Cash and Cash Equivalents—
Interest Income	S. Treasury Securities are pooled for purposes of maximizing returns on these assets to investors of all Series. Interest income from pooled cash management assets is recognized on the accrual basis and allocated daily to each Series based upon its daily proportion of ownership of the pool. Aggregate interest income from all sources, including U.S. Treasury securities and assets held at a futures commission merchant (“FCM”), of up to two percentage points of the aggregate percentage yield (annualized) of net asset value less any fair market value related to swaps, is paid to the Managing Owner by the Frontier Balanced Fund (Class 1, and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Select Fund, Frontier Global Fund and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series. All interest not paid to the Managing Owner is interest income to the Series and shown net on the statement of operations. The amount reflected in the financial statements of the Series are disclosed on a net basis. Due to some classes not exceeding the 2% paid to the Managing Owner, amounts earned by those Series may be zero.
U.S. Treasury Securities	U.S. Treasury Securities— Fair Value Measurements and Disclosures (“
Receivable from Futures Commission Merchants	Receivable From Futures Commission Merchants
Investment Transactions	Investment Transactions— Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest is recognized in the period earned and the instruments are marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the statements of operations.
Purchase and Sales of Private Investment Companies	Purchase and Sales of Private Investment Companies
Foreign Currency Transactions	Foreign Currency Transactions—
Allocation of Earnings	Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific Series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.
Investments and Swaps	Investments and Swaps
Income Taxes	Income Taxes Income Taxes The 2017 through 2020 tax years generally remain subject to examination by U.S. federal and most state tax authorities. In the opinion of the Managing Owner, (i) the Trust, with respect to the Series, is treated as a partnership for federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Units of the Trust.
Fees and Expenses	Fees and Expenses
Incentive Fee (rebate)	Incentive Fee (rebate)
Service Fees	Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2018, 2019 and 2020 the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2021 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $22,650, $393, $31,725, $363,825, $20,766, $157,782 and $68,076 for the Frontier Diversified, Long/Short Commodity, Masters, Balanced, Select, Global and Heritage Funds, respectively, as of September 30, 2021. These service fees are part of the offering costs of the Trust, with respect to the Series, which include registration and filing fees, legal and blue sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.
Pending Owner Additions	Pending Owner Additions—
Owner redemptions payable	Owner redemptions payable—
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements—
Subsequent Events	Subsequent Events—The Series follow the provisions of ASC 855, Subsequent Events
Frontier Funds [Member]
Accounting Policies, by Policy (Policies) [Line Items]
Basis of Presentation	Basis of Presentation
Consolidation	Consolidation The income or loss attributable thereto in proportion of investment level is shown in the statements of operations as change in fair value of investments in unconsolidated Trading Companies or net unrealized gain/(loss) on private investment companies. The Trading Companies and Series of the Trust are consolidated by the Trust. All intercompany transactions have been eliminated in consolidation. Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus entities. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust’s ownership percentage in Galaxy Plus entities. It is expected that ownership percentage will fluctuate (sometimes significantly) on a week by week basis which could also result in frequent changes in the consolidating Series. Such fluctuations make consolidating the financial statements of the Galaxy Plus entities both impractical and misleading. Non-consolidation of these Galaxy Plus entities presents a more useful financial statement for the readers. As such, management has decided that presenting Galaxy Plus entities on a non-consolidated basis as investments in other investments companies (a “fund of funds” approach) is appropriate and preferable to the users of these financial statements. Refer to Note 5 for additional disclosures related to these private investment companies.
Use of Estimates	Use of Estimates—
Cash and Cash Equivalents	Cash and Cash Equivalents—
Interest Income	Interest Income
U.S. Treasury Securities	U.S. Treasury Securities— Fair Value Measurements and Disclosures (“
Receivable from Futures Commission Merchants	Receivable from Futures Commission Merchants
Investment Transactions	Investment Transactions—Futures, options on futures, forward and swap contracts are recorded on a trade date basis and realized gains or losses are recognized when contracts are settled. Unrealized gains or losses on open contracts (the difference between contract trade price and market price) are reported in the consolidated statements of financial condition as a net unrealized gain or loss, as there exists a right of offset of unrealized gains or losses in accordance with FASB ASC 210, Balance Sheet (“ASC 210” Balance Sheet (Topic 210 Any change in net unrealized gain or loss from the preceding period is reported in the consolidated statements of operations. Fair value of exchange-traded contracts is based upon exchange settlement prices. Fair value of non-exchange-traded contracts is based on third party quoted dealer values on the interbank market. For U.S. Treasury securities, interest was recognized in the period earned and the instruments were marked-to-market daily based on third party information. Transaction costs are recognized as incurred and reflected separately in the consolidated statements of operations.
Purchase and Sales of Private Investment Companies	Purchase and Sales of Private Investment Companies
Foreign Currency Transactions	Foreign Currency Transactions—
Allocation of Earnings	Allocation of Earnings— Each Series allocates funds to an affiliated Trading Company, or Companies, of the Trust, or unaffiliated Galaxy Plus entity. Each Trading Company allocates all of its daily trading gains or losses to the Series in proportion to each Series’ ownership trading level interest in the Trading Company, adjusted on a daily basis (except for Trading Advisors and other investments such as swaps that are directly allocated to a specific series). Likewise, trading gains and losses earned and incurred by the Series through their investments in Galaxy Plus entities are allocated to those Series on a daily basis. The allocation of gains and losses in Galaxy Plus entities are based on each Series pro-rata shares of the trading level of that entity which is updated at the beginning of each month or more frequently if there is a subscription or redemption activity in the entity. The value of all open contracts and cash held at clearing brokers is similarly allocated to the Series in proportion to each Series’ funds allocated to the Trading Companies or Galaxy Plus entities.
Investments and Swaps	Investments and Swaps—
Income Taxes	Income Taxes In the opinion of the Managing Owner, (i) the Trust is treated as a partnership for Federal income tax purposes and, assuming that at least 90% of the gross income of the Trust constitutes “qualifying income” within the meaning of Section 7704(d) of the Code, (ii) the Trust is not a publicly traded partnership treated as a corporation, and (iii) the discussion set forth in the Prospectus under the heading “U.S. Federal Income Tax Consequences” correctly summarizes the material Federal income tax consequences as of the date of the Prospectus to potential U.S. Limited Owners of the purchase, ownership and disposition of Series Units of the Trust.
Fees and Expenses	Fees and Expenses—
Incentive Fee (rebate)	Incentive Fee (rebate)—
Service Fees	Service Fees Each Series is charged service fees as outlined above. In some cases, amounts paid to selling agents might be less than the amount charged to the Series. When this occurs, the service fee is rebated back to the investor in the form of additional units. During 2020, 2019 and 2018, the Series were not allowed to issue additional units. The Managing Owner has determined that the purchase of additional units of the relevant Series will commence in 2021 when the Series are allowed to sell shares again. As such, the Managing Owner has calculated the amounts for additional units of the relevant series which will be purchased and classified such amounts as Subscriptions in advance for service fee rebates of $665,217 and $638,962 as of September 30, 2021 and December 31, 2020, respectively. These service fees are part of the offering costs of the Trust, which include registration and filing fees, legal and blue1 sky expenses, accounting and audit, printing, marketing support and other offering costs which are borne by the Managing Owner. With respect to the service fees, the initial service fee (for the first 12 months) relating to a purchase of Class 1 and Class 1a Units by an investor is prepaid by the Managing Owner to the relevant selling agent in the month following such purchase and is reimbursed for such payment by the Series monthly in arrears in an amount based upon a corresponding percentage of NAV, calculated daily. Consequently, the Managing Owner bears the risk of the downside and enjoys the benefit of the upside potential of any difference between the amount of the initial service fee prepaid by it and the amount of the reimbursement thereof, which may result from variations in NAV over the following 12 months.
Pending Owner Additions	Pending Owner Additions—
Owner redemptions payable	Owner redemptions payable—
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements—
Subsequent Events	Subsequent Events Subsequent Events

Condensed Schedules of Invest_2

Condensed Schedules of Investments (Unaudited) (Tables)	9 Months Ended
	Sep. 30, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Schedule of investment companies (Unaudited)	Frontier Frontier Frontier Diversified Fund Masters Fund Long/Short Commodity Fund Fair % of Total Capital Fair % of Total Capital Fair % of Total Capital Description Value Value) Value Value) Value Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 726,697 23.14 % $ - 0.00 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 216,565 6.90 % - 0.00 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 573,120 18.25 % - 0.00 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 742,805 23.65 % 353,746 43.90 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 477,374 15.20 % 252,047 31.28 % 554,077 39.30 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 324,574 10.33 % 176,447 21.90 % - 0.00 % Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) - 0.00 % - 0.00 % 302,145 21.43 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC - 0.00 % - 0.00 % 479,374 34.00 % Total Private Investment Companies $ 3,061,135 97.47 % $ 782,240 97.07 % $ 1,335,596 94.72 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 30,579 0.97 % $ 16,239 2.02 % $ 21,311 1.51 % Total Investment in Unconsolidated Trading Companies $ 30,579 0.97 % $ 16,239 2.02 % $ 21,311 1.51 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value Fair Value $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ 33,471 1.07 % $ 17,774 2.21 % $ 23,326 1.65 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 27,099 $ 14,390 $ 18,885 Additional Disclosure on U.S. Treasury Securities Cost Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 34,116 $ 18,117 $ 23,775 Frontier Global Frontier Fund Heritage Fund Fair % of Total Capital Fair % of Total Capital Description Value (Net Asset Value) Value (Net Asset Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ 2,802,754 103.99 % $ 1,657,316 63.96 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC - - 907,058 35.00 % Total Private Investment Companies $ 2,802,754 103.99 % $ 2,564,374 98.96 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 18,148 0.67 % $ 29,586 1.14 % Total Investment in Unconsolidated Trading Companies $ 18,148 0.67 % $ 29,586 1.14 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ 19,864 0.74 % $ 32,384 1.25 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 16,082 $ 26,218 Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 20,246 $ 33,007 Frontier Frontier Frontier Diversified Fund Masters Fund Fund Fair % of Total Fair % of Total Fair % of Total Description Value Value) Value Value) Value Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 1,066,074 25.49 % $ - 0.00 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 414,692 9.91 % - 0.00 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 672,766 16.08 % - 0.00 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 732,066 17.50 % 486,659 48.98 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 435,119 10.40 % 258,609 26.03 % 272,294 20.73 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 323,886 7.74 % 269,323 27.11 % - 0.00 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC - 0.00 % - 0.00 % 465,759 35.46 % Total Private Investment Companies $ 3,644,603 87.12 % $ 1,014,591 102.12 % $ 738,053 56.19 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 16,669 0.40 % $ 907 0.09 % $ 17,736 1.35 % Total Investment in Unconsolidated Trading Companies $ 16,669 0.40 % $ 907 0.09 % $ 17,736 1.35 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value Fair Value $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 427,393 10.22 % $ 23,245 2.34 % $ 454,738 34.63 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 328,604 $ 17,872 $ 349,629 Additional Disclosure on U.S. Treasury Securities Cost Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 427,509 $ 23,251 $ 454,862 Frontier Frontier Global Fund Heritage Fund Fair % of Total Capital Fair % of Total Capital Description Value Value) Value Value) PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ 3,068,656 104.71 % $ 1,539,331 64.53 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC - - 828,131 34.72 % Total Private Investment Companies $ 3,068,656 104.71 % $ 2,367,462 99.25 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 1,083 0.04 % $ 2,880 0.12 % Total Investment in Unconsolidated Trading Companies $ 1,083 0.04 % $ 2,880 0.12 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 27,742 0.95 % $ 73,847 3.10 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 21,330 $ 56,778 Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 27,750 $ 73,867 Fair % of Total Capital Value Value) PRIVATE INVESTMENT COMPANIES (1) Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) $ 302,146 1.35 % Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 2,419,421 10.82 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 1,184,603 5.30 % Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC 131,464 0.59 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 1,899,239 8.49 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 7,322,291 32.74 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 5,786,775 25.87 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 2,550,021 11.40 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC 479,373 2.14 % Total Private Investment Companies $ 22,075,333 98.70 % U.S. TREASURY SECURITIES FACE VALUE $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ 143,896 0.64 % Total U.S. Treasury Securities $ 143,896 0.64 %
Condensed Schedule of futures contracts and investment companies (Unaudited)	Frontier Frontier Balanced Fund Select Fund Fair % of Total Capital Fair % of Total Capital Description Value (Net Asset Value) Value (Net Asset Value) LONG FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ (9,652 ) -0.10 % $ - 0.00 % Various agriculture futures contracts (Europe) 85,119 0.84 % - 0.00 % Various agriculture futures contracts (U.S.) 43,697 0.43 % - 0.00 % Various base metals futures contracts (U.S.) (39,727 ) -0.39 % - 0.00 % Various currency futures contracts (Europe) (481 ) 0.00 % - 0.00 % Various currency futures contracts (Far East) (15,984 ) -0.16 % - 0.00 % Various currency futures contracts (Latin America) (9,108 ) -0.09 % - 0.00 % Various currency futures contracts (U.S.) 7,388 0.07 % - 0.00 % Various energy futures contracts (U.S.) 79,410 0.78 % - 0.00 % Various interest rates futures contracts (Europe) (334,215 ) -3.30 % - 0.00 % Various interest rates futures contracts (Far East) (24,169 ) -0.24 % - 0.00 % Various interest rates futures contracts (U.S.) (14,625 ) -0.14 % - 0.00 % Various precious metal futures contracts (U.S.) (5,456 ) -0.05 % - 0.00 % Various stock index futures contracts (Europe) (5,437 ) -0.05 % - 0.00 % Various stock index futures contracts (Far East) (3,432 ) -0.03 % - 0.00 % Various stock index futures contracts (Oceanic) (1,626 ) -0.02 % - 0.00 % Various stock index futures contracts (U.S.) (10,558 ) -0.10 % - 0.00 % Various stock index futures contracts (Canada) (3,951 ) -0.04 % - 0.00 % Total Long Futures Contracts $ (262,807 ) -2.59 % $ - 0.00 % SHORT FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ 3,818 0.04 % $ - 0.00 % Various agriculture futures contracts (Europe) (55,212 ) -0.54 % - 0.00 % Various agriculture futures contracts (U.S.) 1,372 0.01 % - 0.00 % Various base metals futures contracts (U.S.) 9,982 0.10 % - 0.00 % Various currency futures contracts (Europe) 30,456 0.30 % - 0.00 % Various currency futures contracts (Far East) 828 0.01 % - 0.00 % Various currency futures contracts (Latin America) 20,698 0.20 % - 0.00 % Various currency futures contracts (U.S.) (4,750 ) -0.05 % - 0.00 % Various energy futures contracts (U.S.) (43,480 ) -0.43 % - 0.00 % Various interest rates futures contracts (Europe) 264,970 2.61 % - 0.00 % Various interest rates futures contracts (Far East) 35,149 0.35 % - 0.00 % Various interest rates futures contracts (U.S.) 5,313 0.05 % - 0.00 % Various precious metal futures contracts (U.S.) 67,448 0.67 % - 0.00 % Various stock index futures contracts (Canada) 2,986 0.03 % - 0.00 % Various stock index futures contracts (Europe) 8,521 0.08 % - 0.00 % Various stock index futures contracts (U.S.) (963 ) -0.01 % - 0.00 % Total Short Futures Contracts $ 347,136 3.42 % $ - 0.00 % Total Open Trade Equity (Deficit) $ 84,329 0.83 % $ - 0.00 % PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 1,692,724 16.69 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 968,038 9.55 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 1,326,119 13.08 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 1,765,668 17.41 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 2,613,293 25.77 % 982,926 62.05 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC 1,476,322 14.56 % 572,680 36.15 % Total Private Investment Companies $ 9,842,164 97.06 % $ 1,555,606 98.20 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ - 0.00 % $ 15,601 0.98 % Total Investment in Unconsolidated Trading Companies $ - 0.00 % $ 15,601 0.98 % U.S. TREASURY SECURITIES (2) FACE VALUE Fair Value Fair Value $ 116,500 US Treasury Note 6.875% due 08/15/2025 (Cost $146,667) $ - 0.00 % $ 17,077 1.08 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ - $ 13,826 Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ - $ 17,406 Frontier Frontier Balanced Fund Select Fund Fair % of Total Capital Fair % of Total Capital Description Value Value) Value Value) LONG FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ 72,005 0.59 % $ - 0.00 % Various agriculture futures contracts (Europe) 9,803 0.08 % - 0.00 % Various agriculture futures contracts (U.S.) 87,496 0.72 % - 0.00 % Various base metals futures contracts (U.S.) 22,858 0.19 % - 0.00 % Various currency futures contracts (Europe) 10,573 0.09 % - 0.00 % Various currency futures contracts (Latin America) 5,833 0.05 % - 0.00 % Various currency futures contracts (U.S.) (100 ) 0.00 % - 0.00 % Various interest rates futures contracts (Europe) 148,949 1.23 % - 0.00 % Various interest rates futures contracts (Far East) 2,882 0.02 % - 0.00 % Various interest rates futures contracts (U.S.) 2,438 0.02 % - 0.00 % Various precious metal futures contracts (U.S.) 28,625 0.24 % - 0.00 % Various soft futures contracts (U.S.) 52,349 0.43 % - 0.00 % Various stock index futures contracts (Far East) 5,312 0.04 % - - Total Long Futures Contracts $ 449,023 3.70 % $ - 0.00 % SHORT FUTURES CONTRACTS* Various agriculture futures contracts (Far East) $ (30,963 ) -0.26 % $ - 0.00 % Various agriculture futures contracts (Europe) (10,797 ) -0.09 % - 0.00 % Various agriculture futures contracts (U.S.) (92,738 ) -0.77 % - 0.00 % Various base metals futures contracts (U.S.) (10,289 ) -0.08 % - 0.00 % Various currency futures contracts (Europe) (10,381 ) -0.09 % - 0.00 % Various currency futures contracts (Latin America) 2,512 0.02 % - 0.00 % Various currency futures contracts (U.S.) 2,300 0.02 % - 0.00 % Various interest rates futures contracts (Europe) (127,832 ) -1.06 % - 0.00 % Various interest rates futures contracts (Far East) (2,482 ) -0.02 % - 0.00 % Various interest rates futures contracts (U.S.) 3,656 0.03 % - 0.00 % Various precious metal futures contracts (U.S.) (25,560 ) -0.21 % - 0.00 % Various soft futures contracts (U.S.) (42,669 ) -0.35 % - 0.00 % Various stock index futures contracts (Far East) (3,340 ) -0.03 % - 0.00 % Total Short Futures Contracts $ (348,583 ) -2.89 % $ - 0.00 % Total Open Trade Equity (Deficit) $ 100,440 0.81 % $ - 0.00 % PRIVATE INVESTMENT COMPANIES (3) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 2,311,240 19.08 % $ - 0.00 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 1,581,941 13.06 % - 0.00 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 982,020 8.11 % - 0.00 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 1,600,611 13.22 % - 0.00 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 2,612,336 21.57 % 956,968 57.89 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 1,440,104 11.89 % 681,697 41.24 % Total Private Investment Companies $ 10,528,252 86.93 % $ 1,638,665 99.13 % INVESTMENT IN UNCONSOLIDATED TRADING COMPANIES (3) Frontier Trading Company XXXVIII, LLC $ 49,755 0.41 % $ - 0.00 % Total Investment in Unconsolidated Trading Companies $ 49,755 0.41 % $ - 0.00 % U.S. TREASURY SECURITIES (2) FACE VALU E Fair Value Fair Value $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 1,275,641 10.53 % $ - 0.00 % Additional Disclosure on U.S. Treasury Securities Face Value Face Value US Treasury Note 6.875% due 08/15/2025 (2) $ 980,787 $ - Additional Disclosure on U.S. Treasury Securities Cost Cost US Treasury Note 6.875% due 08/15/2025 (2) $ 1,275,989 $ - Fair % of Total Capital Description Value Value) LONG FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ (9,652 ) -0.04 % Various agriculture futures contracts (Europe) 85,119 0.38 % Various agriculture futures contracts (U.S.) 43,697 0.20 % Various base metals futures contracts (U.S.) (39,727 ) -0.18 % Various currency futures contracts (Europe) (481 ) 0.00 % Various currency futures contracts (Far East) (15,984 ) -0.07 % Various currency futures contracts (Latin America) (9,108 ) -0.04 % Various currency futures contracts (U.S.) 7,388 0.03 % Various energy futures contracts (U.S.) 79,410 0.36 % Various interest rates futures contracts (Europe) (334,215 ) -1.49 % Various interest rates futures contracts (Far East) (24,169 ) -0.11 % Various interest rates futures contracts (U.S.) (14,625 ) -0.07 % Various precious metal futures contracts (U.S.) (5,456 ) -0.02 % Various stock index futures contracts (Europe) (5,437 ) -0.02 % Various stock index futures contracts (Far East) (3,432 ) -0.02 % Various stock index futures contracts (Oceanic) (1,626 ) -0.01 % Various stock index futures contracts (U.S.) (10,558 ) -0.05 % Various stock index futures contracts (Canada) (3,951 ) -0.02 % Total Long Futures Contracts $ (262,807 ) -1.17 % SHORT FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ 3,818 0.02 % Various agriculture futures contracts (Europe) (55,212 ) -0.25 % Various agriculture futures contracts (U.S.) 1,372 0.01 % Various base metals futures contracts (U.S.) 9,982 0.04 % Various currency futures contracts (Europe) 30,456 0.14 % Various currency futures contracts (Far East) 828 0.00 % Various currency futures contracts (Latin America) 20,698 0.09 % Various currency futures contracts (U.S.) (4,750 ) -0.02 % Various energy futures contracts (U.S.) (43,480 ) -0.19 % Various interest rates futures contracts (Europe) 264,970 1.18 % Various interest rates futures contracts (Far East) 35,149 0.16 % Various interest rates futures contracts (U.S.) 5,313 0.02 % Various precious metal futures contracts (U.S.) 67,448 0.30 % Various stock index futures contracts (Canada) 2,986 0.01 % Various stock index futures contracts (Europe) 8,521 0.04 % Various stock index futures contracts (U.S.) (963 ) 0.00 % Total Short Futures Contracts $ 347,136 1.55 % Total Open Trade Equity (Deficit) $ 84,329 0.38 % Fair % of Total Capital Description Value Value) LONG FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ 72,005 0.28 % Various agriculture futures contracts (Europe) 9,803 0.04 % Various agriculture futures contracts (U.S.) 87,496 0.34 % Various base metals futures contracts (U.S.) 22,858 0.09 % Various currency futures contracts (U.S.) (100 ) 0.00 % Various currency futures contracts (Europe) 10,573 0.04 % Various currency futures contracts (Latin America) 5,833 0.02 % Various interest rates futures contracts (Europe) 148,949 0.58 % Various interest rates futures contracts (Far East) 2,882 0.01 % Various interest rates futures contracts (U.S.) 2,438 0.01 % Various precious metal futures contracts (U.S.) 28,625 0.11 % Various soft futures contracts (U.S.) 52,349 0.20 % Various stock index futures contracts (Far East) 5,312 0.02 % Total Long Futures Contracts $ 449,023 1.74 % SHORT FUTURES CONTRACTS * Various agriculture futures contracts (Far East) $ (30,963 ) -0.12 % Various agriculture futures contracts (Europe) (10,797 ) -0.04 % Various agriculture futures contracts (U.S.) (92,738 ) -0.36 % Various base metals futures contracts (U.S.) (10,289 ) -0.04 % Various currency futures contracts (U.S.) 2,300 0.01 % Various currency futures contracts (Europe) (10,381 ) -0.04 % Various currency futures contracts (Latin America) 2,512 0.01 % Various interest rates futures contracts (Europe) (127,832 ) -0.50 % Various interest rates futures contracts (Far East) (2,482 ) -0.01 % Various interest rates futures contracts (U.S.) 3,656 0.01 % Various precious metal futures contracts (U.S.) (25,560 ) -0.10 % Various soft futures contracts (U.S.) (42,669 ) -0.17 % Various stock index futures contracts (Far East) (3,340 ) -0.01 % Total Short Futures Contracts $ (348,583 ) -1.36 % Total Open Trade Equity (Deficit) $ 100,440 0.38 % PRIVATE INVESTMENT COMPANIES (1) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC $ 3,377,314 13.21 % Galaxy Plus Fund - QIM Feeder Fund (526) LLC 1,996,633 7.81 % Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC 89,029 0.35 % Galaxy Plus Fund - Quest Feeder Fund (517) LLC 1,654,786 6.47 % Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 7,427,324 29.05 % Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 5,363,456 20.98 % Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 2,715,008 10.62 % Galaxy Plus Fund - LRR Feeder Fund (522) LLC 465,759 1.82 % Total Private Investment Companies $ 23,089,312 90.31 % U.S. TREASURY SECURITIES FACE VALUE $ 1,755,000 US Treasury Note 6.875% due 08/15/2025 (Cost $2,283,228) $ 2,282,606 8.93 % Total U.S. Treasury Securities $ 2,282,606 8.93 %

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Fair Value Measurements (Tables) [Line Items]
Schedule of financial asset portfolio measured at fair value	September 30, 2021 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 30,579 $ - $ - $ 30,579 U.S. Treasury Securities 33,471 - - 33,471 Frontier Masters Fund Investment in Unconsolidated Trading Companies 16,239 - - 16,239 U.S. Treasury Securities 17,774 - - 17,774 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 21,311 - - 21,311 U.S. Treasury Securities 23,326 - - 23,326 Frontier Balanced Fund Open Trade Equity (Deficit) 84,329 - - 84,329 Frontier Select Fund - Investment in Unconsolidated Trading Companies 15,601 - - 15,601 U.S. Treasury Securities 17,077 - - 17,077 Frontier Global Fund - Investment in Unconsolidated Trading Companies 18,148 - - 18,148 U.S. Treasury Securities 19,864 - - 19,864 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 29,586 - - 29,586 U.S. Treasury Securities 32,384 - - 32,384 December 31, 2020 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 16,669 $ - $ - $ 16,669 U.S. Treasury Securities 427,393 - - 427,393 Frontier Masters Fund Investment in Unconsolidated Trading Companies 907 - - 907 U.S. Treasury Securities 23,245 - - 23,245 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 17,736 - - 17,736 U.S. Treasury Securities 454,738 - - 454,738 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 49,755 - - 49,755 Open Trade Equity (Deficit) 100,440 - - 100,440 U.S. Treasury Securities 1,275,641 - - 1,275,641 Frontier Global Fund Investment in Unconsolidated Trading Companies 1,083 - - 1,083 U.S. Treasury Securities 27,742 - - 27,742 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 2,880 - - 2,880 U.S. Treasury Securities 73,847 - - 73,847
Schedule of change in Level 3 assets measured at fair value on recurring basis	Frontier Frontier Balance of recurring Level 3 assets as of January 1, 2020 $ 11,944,753 $ 362,521 Total gains or losses (realized/unrealized): Included in earnings-realized (2,448,166 ) 188,100 Included in earnings-unrealized (3,088,917 ) 44,277 Proceeds from collateral reduction (6,176,555 ) (115,000 ) Sale of investments (7,586,366 ) (594,898 ) Purchase of investments 7,355,251 115,000 Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2020 $ - $ - Frontier Frontier Balance of recurring Level 3 assets as of January 1, 2020 $ 6,384,583 $ 2,888,009 Total gains or losses (realized/unrealized): Included in earnings-realized (446,306 ) (97,745 ) Included in earnings-unrealized (1,537,399 ) 197,829 Proceeds from collateral reduction (4,000,000 ) (2,474,937 ) Sale of investments (4,870,025 ) (1,491,965 ) Purchase of investments 4,469,147 978,809 Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2020 $ - $ - Frontier Balance of recurring Level 3 assets as of January 1, 2020 $ 479,024 Change in fair value of investments in unconsolidated trading companies 95,915 Proceeds from sales of investments of unconsolidated trading companies (574,939 ) Purchases of investments of unconsolidated trading companies - Change in ownership allocation - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2020 $ -
Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments	Frontier Frontier Frontier Frontier Swap Contracts $ (1,537,399 ) $ 44,277 $ (3,088,917 ) $ 197,829 Frontier Investments in Unconsolidated Trading Companies $ (91,989 )
Frontier Funds [Member]
Fair Value Measurements (Tables) [Line Items]
Schedule of financial asset portfolio measured at fair value	September 30, 2021 Level 1 Level 2 Level 3 Total Fair Open Trade Equity (Deficit) $ 84,329 $ - $ - $ 84,329 U.S. Treasury Securities 143,896 - - 143,896 December 31, 2020 Level 1 Level 2 Level 3 Total Fair Open Trade Equity (Deficit) $ 100,440 $ - $ - $ 100,440 U.S. Treasury Securities 2,282,606 - - 2,282,606
Schedule of change in unrealized appreciation (depreciation)	For the Year Balance of recurring Level 3 assets as of January 1, 2020 $ 21,579,865 Total gains or losses (realized/unrealized): Included in earnings-realized (2,896,106 ) Included in earnings-unrealized (4,384,210 ) Proceeds from collateral reduction (12,674,502 ) Purchase of investments 12,918,207 Sale of investments (14,543,254 ) Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2020 $ -

Swap Contracts (Tables)

Swap Contracts (Tables)	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Swap Contracts (Tables) [Line Items]
Schedule of Investments in following swap	Frontier Frontier Frontier Frontier Total Total Total Total Counterparty Deutsche Deutsche Deutsche Deutsche Realized Gain/(Loss) $ (2,448,166 ) $ (446,306 ) $ 188,100 $ (97,745 ) Change in Unrealized Gain/(Loss) $ (3,088,917 ) $ (1,537,399 ) $ 44,277 $ 197,829 Fair Value as of December 31, 2020 $ 0 $ 0 $ 0 $ 0 Advance on swap appreciation $ 0 $ 0 $ 0 $ 0
Frontier Funds [Member]
Swap Contracts (Tables) [Line Items]
Schedule of Investments in following swap	XXXIV XXXV XXXVII L/S Brevan Howard Total Total Total Total Counterparty Deutsche Deutsche Deutsche Deutsche Realized Gain/(Loss) $ (2,448,166 ) $ (446,306 ) $ 188,100 $ (189,734 ) Change in Unrealized Gain/(Loss) $ (3,088,917 ) $ (1,537,399 ) $ 44,277 $ 197,829 Fair Value as of December 31, 2020 $ 0 $ 0 $ 0 $ 0 Advance on swap appreciation $ 0 $ 0 $ 0 $ 0

Investments in Unconsolidated_2

Investments in Unconsolidated Trading Companies and Private Investment Companies (Tables)	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Tables) [Line Items]
Schedule of investments in unconsolidated trading companies	As of September 30, 2021 As of December 31, 2020 Percentage of Percentage of Series Total Series Total Capital Invested in Capital Invested in Series Unconsolidated Trading Companies Fair Value Unconsolidated Trading Companies Fair Value Frontier Diversified Series — Frontier Trading Company XXXVIII 0.97 % $ 30,579 0.40 % $ 16,669 Frontier Masters Fund --- Frontier Trading Company XXXVIII 2.02 % $ 16,239 0.09 % $ 907 Frontier Long/Short Commodity Fund --- Frontier Trading Company XXXVIII 1.51 % $ 21,311 1.35 % $ 17,736 Frontier Balanced Fund --- Frontier Trading Company XXXVIII 0.00 % $ - 0.41 % $ 49,755 Frontier Select Fund --- Frontier Trading Companies XXXVIII 0.98 % $ 15,601 0.00 % $ - Frontier Global Fund --- Frontier Trading Company XXXVIII 0.67 % $ 18,148 0.04 % $ 1,083 Frontier Heritage Fund --- Frontier Trading Company XXXVIII 1.14 % $ 29,586 0.12 % $ 2,880
Schedule of equity in earnings from unconsolidated trading companies and private investment companies	Three Months Ended September, 2021 Three Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (7,892 ) $ (7,892 ) $ - $ - $ 371 $ 371 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (1,527 ) 17,408 55,124 71,005 (1,694 ) (175,943 ) (21,260 ) (198,897 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - 105 105 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (5,782 ) (5,782 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (5,970 ) 169,823 (627,689 ) (463,836 ) (4,862 ) (3,470 ) (33,133 ) (41,465 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - - - - - (21,170 ) (21,170 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (3,803 ) (30,844 ) 222,902 188,255 (709 ) (231,484 ) 107,025 (125,168 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (4,627 ) 4,082 (85,162 ) (85,707 ) (3,539 ) (27,771 ) 22,238 (9,072 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (13,098 ) 183,530 (9,760 ) 160,672 (10,562 ) 101,830 (36,659 ) 54,609 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (1,703 ) (20,009 ) 22,204 492 (1,279 ) (396,950 ) (62,845 ) (461,074 ) Total $ (30,728 ) $ 323,990 $ (430,273 ) $ (137,011 ) $ (22,645 ) $ (733,788 ) $ (51,110 ) $ (807,543 ) Frontier Global Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 829 $ 829 $ - $ - $ (2,540 ) $ (2,540 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (2,503 ) 28,130 73,429 99,056 (3,236 ) (317,392 ) (114,867 ) (435,495 ) Total $ (2,503 ) $ 28,130 $ 74,258 $ 99,885 $ (3,236 ) $ (317,392 ) $ (117,407 ) $ (438,035 ) Frontier Select Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (69 ) $ (69 ) $ - $ - $ (1,518 ) $ (1,518 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - (587 ) (587 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (4,877 ) 67,663 (7,516 ) 55,270 (3,352 ) 33,407 (19,556 ) 10,499 Galaxy Plus Fund - TT Feeder Fund (531) LLC - - - - - - (2,763 ) (2,763 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (686 ) (8,299 ) 7,373 (1,612 ) - - (205,413 ) (205,413 ) Total $ (5,563 ) $ 59,364 $ (212 ) $ 53,589 $ (3,352 ) $ 33,407 $ (229,837 ) $ (199,782 ) Frontier Heritage Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 981 $ 981 $ - $ - $ 1,742 $ 1,742 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (1,439 ) 16,356 41,181 56,098 (1,524 ) (149,796 ) 275,381 124,061 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (4,691 ) 66,486 (7,146 ) 54,649 (3,338 ) 34,047 (22,669 ) 8,040 Total $ (6,130 ) $ 82,842 $ 35,016 $ 111,728 $ (4,862 ) $ (115,749 ) $ 254,454 $ 133,843 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (7 ) $ (7 ) $ - $ - $ (2,028 ) $ (2,028 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (882 ) (882 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (120 ) 26,360 (23,799 ) 2,441 (306 ) 40,222 (55,994 ) (16,078 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (2,730 ) 38,119 (5,606 ) 29,783 (1,198 ) 12,151 (9,162 ) 1,791 Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (3,298 ) 86,851 (96,446 ) (12,893 ) - - - - Total $ (6,148 ) $ 151,330 $ (125,858 ) $ 19,324 $ (1,504 ) $ 52,373 $ (68,066 ) $ (17,197 ) Frontier Diversified Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (449 ) $ (449 ) $ - $ - $ (426 ) $ (426 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (640 ) 7,312 23,964 30,636 (1,068 ) (107,528 ) (19,659 ) (128,255 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - 182 182 Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (3,544 ) (3,544 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (2,513 ) 71,506 (271,402 ) (202,409 ) (2,034 ) (1,729 ) (18,808 ) (22,571 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - - - - - - (9,084 ) (9,084 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (870 ) (6,983 ) 50,260 42,407 (271 ) (4,480 ) (47,525 ) (52,276 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - - - - - - - Galaxy Plus Fund - Quest Feeder Fund (517) LLC (2,008 ) 1,764 (37,507 ) (37,751 ) (2,406 ) (18,673 ) 13,323 (7,756 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (2,389 ) 33,745 (2,180 ) 29,176 (3,320 ) 40,922 (22,756 ) 14,846 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (379 ) (4,507 ) 4,402 (484 ) (639 ) (198,372 ) (32,551 ) (231,562 ) Total $ (8,799 ) $ 102,837 $ (232,912 ) $ (138,874 ) $ (9,738 ) $ (289,860 ) $ (140,848 ) $ (440,446 ) Frontier Masters Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (50 ) $ (50 ) $ - $ - $ (1,279 ) $ (1,279 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (296 ) 3,396 11,798 14,898 (608 ) (62,539 ) (9,877 ) (73,024 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - (147 ) (147 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (1,242 ) (1,242 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (1,258 ) 17,769 (1,385 ) 15,126 (1,164 ) 13,859 (11,510 ) 1,185 Galaxy Plus Fund - TT Feeder Fund (531) LLC - - - - - - (1,002 ) (1,002 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (208 ) (2,486 ) 2,113 (581 ) (365 ) (113,226 ) (22,157 ) (135,748 ) Total $ (1,762 ) $ 18,679 $ 12,476 $ 29,393 $ (2,137 ) $ (161,906 ) $ (47,214 ) $ (211,257 ) Nine Months Ended September, 2021 Nine Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Frontier Balanced Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ (36,142 ) $ (36,142 ) $ - $ - $ (9,094 ) $ (9,094 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (4,108 ) 173,578 114,603 284,073 (6,794 ) (163,459 ) (16,563 ) (186,816 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (433 ) - (433 ) (2,152 ) (55,735 ) 25,629 (32,258 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 252 - 252 (6,408 ) (718,397 ) 75,749 (649,056 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (19,136 ) 464,263 (786,970 ) (341,843 ) (20,836 ) (327,914 ) 156,749 (192,001 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (1,910 ) - (1,910 ) (502 ) (232,245 ) (42,835 ) (275,582 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (9,204 ) (233,955 ) 56,175 (186,984 ) (9,264 ) (899,303 ) 157,923 (750,644 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (13,536 ) 121,430 (7,184 ) 100,710 (5,240 ) 28,824 (6,624 ) 16,960 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (39,426 ) 996,949 146,910 1,104,433 (23,203 ) 698,761 (196,095 ) 479,463 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (3,787 ) (448,411 ) 368,448 (83,750 ) (1,279 ) (396,950 ) (62,845 ) (461,074 ) Total $ (89,197 ) $ 1,071,763 $ (144,160 ) $ 838,406 $ (75,678 ) $ (2,066,418 ) $ 81,994 $ (2,060,102 ) Frontier Global Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 13,159 $ 13,159 $ - $ - $ (2,994 ) $ (2,994 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (6,827 ) 293,622 80,258 367,053 (11,634 ) (316,235 ) (194,046 ) (521,915 ) Total $ (6,827 ) $ 293,622 $ 93,417 $ 380,212 $ (11,634 ) $ (316,235 ) $ (197,040 ) $ (524,909 ) Frontier Select Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 6,956 $ 6,956 $ - $ - $ (8,190 ) $ (8,190 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - 387 - 387 - - (2,203 ) (2,203 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (13,325 ) 321,795 38,851 347,321 (7,477 ) 228,470 (72,058 ) 148,935 Galaxy Plus Fund - TT Feeder Fund (531) LLC - 864 - 864 (5,392 ) (237,723 ) (35,753 ) (278,868 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (1,599 ) (198,484 ) 149,525 (50,558 ) - - (205,413 ) (205,413 ) Total $ (14,924 ) $ 124,562 $ 195,332 $ 304,970 $ (12,869 ) $ (9,253 ) $ (323,617 ) $ (345,739 ) Frontier Heritage Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 11,448 $ 11,448 $ - $ - $ (1,582 ) $ (1,582 ) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (3,865 ) 161,521 26,673 184,329 (4,298 ) (151,155 ) 238,686 83,233 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (12,655 ) 302,134 31,369 320,848 (7,216 ) 215,524 (85,350 ) 122,958 Total $ (16,520 ) $ 463,655 $ 69,490 $ 516,625 $ (11,514 ) $ 64,369 $ 151,754 $ 204,609 Frontier Long/Short Commodity Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 9,914 $ 9,914 $ - $ - $ (5,104 ) $ (5,104 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 36 - 36 (938 ) (103,100 ) 7,770 (96,268 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (543 ) 152,407 (126,776 ) 25,088 (978 ) (76,740 ) (71,464 ) (149,182 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (7,233 ) 173,929 14,090 180,786 (2,824 ) 88,947 (28,627 ) 57,496 Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (7,807 ) 107,810 (88,398 ) 11,605 - - - - Total $ (15,583 ) $ 434,182 $ (191,170 ) $ 227,429 $ (4,740 ) $ (90,893 ) $ (97,425 ) $ (193,058 ) Frontier Diversified Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 2,039 $ 2,039 $ - $ - $ 2,597 $ 2,597 Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (2,057 ) 83,740 55,185 136,868 (4,438 ) (76,179 ) (9,500 ) (90,117 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (245 ) - (245 ) (1,348 ) (39,612 ) 17,858 (23,102 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 157 - 157 (4,119 ) (463,144 ) 50,394 (416,869 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (8,665 ) 136,292 (259,205 ) (131,578 ) (13,164 ) (203,387 ) 60,454 (156,097 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC - (1,166 ) - (1,166 ) (309 ) (144,282 ) (21,773 ) (166,364 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (2,224 ) (57,849 ) 6,460 (53,613 ) (4,112 ) (248,715 ) (1,085 ) (253,912 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (7,103 ) 62,491 48,289 103,677 (3,920 ) 35,081 (6,574 ) 24,587 Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (6,964 ) 172,937 30,463 196,436 (10,591 ) 416,995 (40,991 ) 365,413 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (858 ) (104,890 ) 85,736 (20,012 ) (639 ) (198,372 ) (32,551 ) (231,562 ) Total $ (27,871 ) $ 291,467 $ (31,033 ) $ 232,563 $ (42,640 ) $ (921,615 ) $ 18,829 $ (945,426 ) Frontier Masters Fund Frontier Trading Company XXXVIII, LLC $ - $ - $ 9,882 $ 9,882 $ - $ - $ (3,554 ) $ (3,554 ) Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC - - - - - - - - Galaxy Plus Fund - Aspect Feeder Fund (532) LLC (1,068 ) 39,319 11,837 50,088 (2,657 ) (64,127 ) (37,949 ) (104,733 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (58 ) - (58 ) - - (59 ) (59 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 52 - 52 (1,540 ) (190,409 ) 30,438 (161,511 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (3,592 ) 91,267 10,976 98,651 (3,172 ) 109,775 (20,607 ) 85,996 Galaxy Plus Fund - TT Feeder Fund (531) LLC - 520 - 520 (1,851 ) (84,259 ) (11,424 ) (97,534 ) Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (536 ) (72,777 ) 50,005 (23,308 ) (365 ) (113,226 ) (22,157 ) (135,748 ) Total $ (5,196 ) $ 58,323 $ 82,700 $ 135,827 $ (9,585 ) $ (342,246 ) $ (65,312 ) $ (417,143 )
Schedule of private investment companies have certain redemption and liquidity restrictions	Redemptions Redemptions Liquidity Notice Period Permitted Restrictions Frontier Diversified Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Frontier Masters Fund Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Frontier Long/Short Commodity Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) 24 hours Daily None Frontier Balanced Fund Multi-Strategy Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None Frontier Select Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Frontier Global Fund Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Frontier Heritage Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None
Frontier Funds [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Tables) [Line Items]
Schedule of equity in earnings from unconsolidated trading companies and private investment companies	Three Months Ended September, 2021 Three Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (6,405 ) $ 72,602 $ 205,496 $ 271,693 $ (8,130 ) $ (813,198 ) $ 109,718 $ (711,610 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - - - - - - (447 ) (447 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - - - - - - (11,450 ) (11,450 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (8,483 ) 241,329 (899,091 ) (666,245 ) (6,896 ) (5,199 ) (51,941 ) (64,036 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (120 ) 26,360 (23,799 ) 2,441 (306 ) 40,222 (86,248 ) (46,332 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (4,673 ) (37,827 ) 273,162 230,662 (980 ) (235,964 ) 59,500 (177,444 ) Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC - - - - - - - - Galaxy Plus Fund - Quest Feeder Fund (517) LLC (6,635 ) 5,846 (122,669 ) (123,458 ) (5,945 ) (46,444 ) 35,561 (16,828 ) Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - (1,847 ) (1,847 ) - - (80,092 ) (80,092 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC - - - - - - (3,765 ) (3,765 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (29,043 ) 407,312 (33,593 ) 344,676 (22,934 ) 236,216 (122,312 ) 90,970 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (2,976 ) (35,301 ) 36,092 (2,185 ) (2,283 ) (708,548 ) (322,966 ) (1,033,797 ) Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (3,298 ) 86,851 (96,446 ) (12,893 ) - - - - Total $ (61,633 ) $ 767,172 (662,695 ) 42,844 $ (47,474 ) $ (1,532,915 ) $ (474,442 ) $ (2,054,831 ) Nine Months Ended September, 2021 Nine Months Ended September, 2020 Change in Change in Trading Realized Unrealized Net Income Trading Realized Unrealized Net Income Commissions Gain/(Loss) Gain/(Loss) (Loss) Commissions Gain/(Loss) Gain/(Loss) (Loss) Galaxy Plus Fund - Aspect Feeder Fund (532) LLC $ (17,925 ) $ 751,780 $ 288,555 $ 1,022,410 $ (29,821 ) $ (771,155 ) $ (19,372 ) $ (820,348 ) Galaxy Plus Fund - Doherty Feeder Fund (528) LLC - (349 ) - (349 ) (3,500 ) (95,347 ) 41,225 (57,622 ) Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC - 497 - 497 (13,005 ) (1,475,050 ) 164,351 (1,323,704 ) Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC (27,801 ) 600,555 (1,046,175 ) (473,421 ) (34,000 ) (531,301 ) 217,203 (348,098 ) Galaxy Plus Fund - LRR Feeder Fund (522) LLC (543 ) 149,331 (126,776 ) 22,012 (1,789 ) (453,267 ) (136,072 ) (591,128 ) Galaxy Plus Fund - QIM Feeder Fund (526) LLC (11,428 ) (291,804 ) 62,635 (240,597 ) (13,376 ) (1,148,018 ) 156,838 (1,004,556 ) Galaxy Plus Fund - Quest Feeder Fund (517) LLC (20,639 ) 183,921 41,105 204,387 (9,160 ) 63,905 (13,198 ) 41,547 Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC - - 42,887 42,887 - - (80,092 ) (80,092 ) Galaxy Plus Fund - TT Feeder Fund (531) LLC - 1,384 - 1,384 (7,243 ) (321,982 ) (47,177 ) (376,402 ) Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC (83,195 ) 2,059,011 272,659 2,248,475 (54,483 ) 1,758,472 (443,728 ) 1,260,261 Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) (6,780 ) (824,562 ) 653,714 (177,628 ) (2,283 ) (708,548 ) (322,966 ) (1,033,797 ) Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) (7,807 ) 107,810 (88,398 ) 11,605 - - - - Total $ (176,118 ) $ 2,737,574 $ 100,206 $ 2,661,662 $ (168,660 ) $ (3,682,291 ) $ (482,988 ) $ (4,333,939 )
Schedule of private investment companies have certain redemption and liquidity restrictions	Redemptions Redemptions Liquidity Notice Period Permitted Restrictions Frontier Funds Multi-Strategy Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) 24 hours Daily None Trend Following Galaxy Plus Fund - Aspect Feeder Fund (532) LLC 24 hours Daily None Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC 24 hours Daily None Galaxy Plus Fund - QIM Feeder Fund (526) LLC 24 hours Daily None Galaxy Plus Fund - Quest Feeder Fund (517) LLC 24 hours Daily None

Transactions with Affiliates (T

Transactions with Affiliates (Tables) - The Series of Frontier Funds [Member]	9 Months Ended
	Sep. 30, 2021
Transactions with Affiliates (Tables) [Line Items]
Schedule of fees earned by managing owner	Three Months Ended September 30, 2021 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 310 $ 29,513 Frontier Masters Fund - - 135 12,339 Frontier Long/Short Commodity Fund - - 58 10,055 Frontier Balanced Fund 54,924 4,764 62,976 108,142 Frontier Select Fund - - 11,949 12,176 Frontier Global Fund - - 17,993 34,334 Frontier Heritage Fund - - 16,886 25,399 Three Months Ended September 30, 2020 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 2,062 $ 50,536 Frontier Masters Fund - - 407 21,879 Frontier Long/Short Commodity Fund - - 108 7,777 Frontier Balanced Fund - 5,029 73,754 127,677 Frontier Select Fund - - 13,025 10,391 Frontier Global Fund - - 22,977 42,481 Frontier Heritage Fund - - 15,845 25,094 Nine Months Ended September 30, 2021 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 1,860 $ 97,487 Frontier Masters Fund - - 492 40,507 Frontier Long/Short Commodity Fund - - 170 28,870 Frontier Balanced Fund 104,764 13,978 195,972 332,131 Frontier Select Fund - - 35,191 35,541 Frontier Global Fund - - 58,383 106,684 Frontier Heritage Fund - - 50,788 75,071 Nine Months Ended September 30, 2020 Incentive (Rebate) Management Service Trading Frontier Diversified Fund $ - $ - $ 12,712 $ 208,221 Frontier Masters Fund - - 1,501 83,524 Frontier Long/Short Commodity Fund - - 330 25,089 Frontier Balanced Fund - 14,753 284,736 465,170 Frontier Select Fund - - 51,117 42,791 Frontier Global Fund - - 81,204 150,154 Frontier Heritage Fund - - 51,802 83,036
Schedule of fees payable to managing owner	As of September 30, 2021 Incentive Management Interest Service Trading Frontier Diversified Fund $ - $ - $ - $ 85 $ 9,894 Frontier Masters Fund - - - 44 4,220 Frontier Long/Short Commodity Fund - - 37 19 3,295 Frontier Balanced Fund 54,924 1,610 1,063 18,384 35,169 Frontier Select Fund - - 249 3,698 4,003 Frontier Global Fund - - 261 5,525 10,585 Frontier Heritage Fund - - 368 5,050 8,117 As of December 31, 2020 Incentive Management Interest Service Trading Frontier Diversified Fund $ - $ - $ - $ 385 $ 12,576 Frontier Masters Fund - - - 70 5,460 Frontier Long/Short Commodity Fund - - 87 18 2,281 Frontier Balanced Fund - 8,854 1,376 21,381 37,894 Frontier Select Fund - - 179 3,709 3,933 Frontier Global Fund - - 326 6,348 11,849 Frontier Heritage Fund - - 139 4,794 7,705
Schedule of interest paid by each series to managing owner	Three Months Ended September 30, September 30, September 30, September 30, Gross Amount Gross Amount Ratio to Average Ratio to Average Frontier Long/Short Commodity Fund Class 2 4 6 0.01 % 0.02 % Frontier Long/Short Commodity Fund Class 3 111 158 0.01 % 0.02 % Frontier Balanced Fund Class 1 3,661 1,019 0.04 % 0.01 % Frontier Balanced Fund Class 1AP 48 16 0.05 % 0.01 % Frontier Balanced Fund Class 2 738 215 0.04 % 0.01 % Frontier Balanced Fund Class 2a 7 2 0.01 % 0.00 % Frontier Balanced Fund Class 3a 45 11 0.01 % 0.00 % Frontier Select Fund Class 1 640 1,349 0.04 % 0.08 % Frontier Select Fund Class 1AP 4 8 0.04 % 0.08 % Frontier Select Fund Class 2 32 54 0.04 % 0.08 % Frontier Global Fund Class 1 388 901 0.02 % 0.03 % Frontier Global Fund Class 1AP - 9 0.00 % 0.03 % Frontier Global Fund Class 2 31 57 0.02 % 0.03 % Frontier Heritage Fund Class 1 660 1,151 0.03 % 0.05 % Frontier Heritage Fund Class 1AP 2 4 0.02 % 0.05 % Frontier Heritage Fund Class 2 69 235 0.03 % 0.06 % Total $ 6,440 $ 5,195 Nine months ended September 30, September 30, September 30, September 30, Gross Amount Gross Amount Ratio to Average Ratio to Average Frontier Long/Short Commodity Fund Class 2 18 14 0.05 % 0.04 % Frontier Long/Short Commodity Fund Class 3 518 354 0.05 % 0.04 % Frontier Balanced Fund Class 1 7,208 5,419 0.08 % 0.04 % Frontier Balanced Fund Class 1AP 96 79 0.09 % 0.04 % Frontier Balanced Fund Class 2 1,456 1,074 0.08 % 0.04 % Frontier Balanced Fund Class 2a 14 12 0.02 % 0.01 % Frontier Balanced Fund Class 3a 87 58 0.02 % 0.01 % Frontier Select Fund Class 1 2,208 3,081 0.14 % 0.14 % Frontier Select Fund Class 1AP 15 15 0.14 % 0.14 % Frontier Select Fund Class 2 104 112 0.14 % 0.14 % Frontier Global Fund Class 1 2,492 2,649 0.10 % 0.07 % Frontier Global Fund Class 1AP - 24 0.00 % 0.07 % Frontier Global Fund Class 2 183 208 0.09 % 0.07 % Frontier Heritage Fund Class 1 2,708 2,800 0.12 % 0.12 % Frontier Heritage Fund Class 1AP 10 11 0.12 % 0.12 % Frontier Heritage Fund Class 2 277 623 0.12 % 0.12 % Total $ 17,394 $ 16,533

Financial Highlights (Tables)

Financial Highlights (Tables)	9 Months Ended
	Sep. 30, 2021
The Series of the Frontier Funds [Member]
Financial Highlights (Tables) [Line Items]
Schedule of financial highlights of trust	Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, June 30, 2021 $ 77.68 $ 95.90 $ 89.95 $ - $ 73.52 $ 69.23 $ 98.49 $ 63.74 $ 103.32 $ 67.36 Net operating results: Interest income 0.03 0.03 0.03 - 0.05 0.05 0.04 0.03 0.05 0.03 Expenses (1.30 ) (0.87 ) (0.81 ) - (1.10 ) (1.09 ) (0.71 ) (0.46 ) (0.74 ) (0.49 ) Net gain/(loss) on investments, net of non-controlling interests (76.41 ) (4.08 ) (3.77 ) - * 2.63 2.57 1.27 1.04 1.33 1.14 Net income/(loss) (77.68 ) (4.91 ) (4.56 ) - * 1.58 1.53 0.60 0.61 0.63 0.68 Net asset value, September 30, 2021 $ - $ 90.99 $ 85.39 $ - * $ 75.10 $ 70.76 $ 99.09 $ 64.35 $ 103.95 $ 68.04 Ratios to average net assets Net investment income/(loss) -6.53 % -3.45 % -3.45 % 0.00 % -5.88 % -5.88 % -2.67 % -2.67 % -2.67 % -2.67 % Expenses before incentive fees (3)(4) 6.67 % 3.60 % 3.60 % 0.00 % 6.17 % 6.17 % 2.85 % 2.85 % 2.85 % 2.85 % Expenses after incentive fees (3)(4) 6.67 % 3.60 % 3.60 % 0.00 % 6.17 % 6.17 % 2.85 % 2.85 % 2.85 % 2.85 % Total return before incentive fees (2) -1.71 %* -5.12 % -5.07 % 0.00 %* 2.15 % 2.21 % 0.61 % 0.96 % 0.61 % 1.01 % Total return after incentive fees (2) -1.71 %* -5.12 % -5.07 % 0.00 %* 2.15 % 2.21 % 0.61 % 0.96 % 0.61 % 1.01 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2021 $ 85.86 $ 105.55 $ 142.34 $ 123.47 $ 123.05 $ 66.17 $ 81.44 $ 108.07 Net operating results: Interest income 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 Expenses (2.03 ) (1.70 ) (46.17 ) (1.99 ) (1.98 ) (1.03 ) (0.62 ) (0.83 ) Net gain/(loss) on investments, net of non-controlling interests 0.79 0.96 45.15 1.17 1.16 2.18 2.66 3.52 Net income/(loss) (1.24 ) (0.73 ) (1.00 ) (0.82 ) (0.82 ) 1.15 2.03 2.70 Net asset value, September 30, 2021 $ 84.62 $ 104.82 $ 141.34 $ 122.65 $ 122.23 $ 67.32 $ 83.47 $ 110.77 Ratios to average net assets Net investment income/(loss) -7.75 % -4.75 % -4.75 % -4.75 % -4.75 % -5.89 % -2.89 % -2.89 % Expenses before incentive fees (3)(4) 7.24 % 4.24 % 4.24 % 4.24 % 4.24 % 5.89 % 2.89 % 2.89 % Expenses after incentive fees (3)(4) 7.75 % 4.75 % 4.75 % 4.75 % 4.75 % 5.89 % 2.89 % 2.89 % Total return before incentive fees (2) -0.93 % -0.18 % -0.19 % -0.15 % -0.15 % 1.73 % 2.49 % 2.49 % Total return after incentive fees (2) -1.45 % -0.70 % -0.70 % -0.66 % -0.67 % 1.73 % 2.49 % 2.49 % Incentive fee per share 0.45 0.55 14.98 0.64 0.64 - - - Incentive Fee to ANA 0.51 % 0.51 % 0.51 % 0.51 % 0.51 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2021 $ 117.28 $ 179.85 $ 109.26 $ 134.44 $ 179.93 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 Expenses (2.33 ) (2.29 ) (1.90 ) (1.45 ) (1.81 ) Net gain/(loss) on investments, net of non-controlling interests 4.61 7.19 4.84 6.12 8.04 Net income/(loss) 2.28 4.90 2.94 4.66 6.24 Net asset value, September 30, 2021 $ 119.56 $ 184.75 $ 112.20 $ 139.10 $ 186.17 Ratios to average net assets Net investment income/(loss) -8.28 % -5.29 % -7.05 % -4.06 % -4.06 % Expenses before incentive fees (3)(4) 8.28 % 5.29 % 7.05 % 4.06 % 4.06 % Expenses after incentive fees (3)(4) 8.28 % 5.29 % 7.05 % 4.06 % 4.06 % Total return before incentive fees (2) 1.95 % 2.72 % 2.69 % 3.47 % 3.47 % Total return after incentive fees (2) 1.95 % 2.72 % 2.69 % 3.47 % 3.47 % Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, June 30, 2020 $ 74.09 $ 89.88 $ 84.09 $ 61.92 $ 75.13 $ 70.56 $ 44.58 $ 83.27 $ 53.49 $ 87.35 $ 56.38 Net operating results: Interest income 0.01 0.02 0.02 0.03 0.04 0.04 0.03 0.06 0.04 0.06 0.04 Expenses (1.46 ) (0.76 ) (0.71 ) (3.18 ) (1.05 ) (1.00 ) (0.69 ) (0.50 ) (0.32 ) (0.52 ) (0.34 ) Net gain/(loss) on investments, net of non-controlling interests (6.17 ) (8.14 ) (7.57 ) (6.62 ) (10.57 ) (9.87 ) (43.93 )* (1.42 ) (0.82 ) (1.49 ) 0.82 Net income/(loss) (7.61 ) (8.88 ) (8.26 ) (9.77 ) (11.58 ) (10.83 ) (44.58 )* (1.86 ) (1.11 ) (1.95 ) (1.12 ) Net asset value, September 30, 2020 $ 66.48 $ 81.00 $ 75.83 $ 52.15 $ 63.55 $ 59.73 $ - * $ 81.41 $ 52.39 $ 85.40 $ 55.27 Ratios to average net assets Net investment income/(loss) -8.16 % -3.45 % -3.45 % -21.78 % -5.83 % -5.83 % -6.06 % -2.17 % -2.17 % -2.17 % -2.17 % Expenses before incentive fees (3)(4) 8.24 % 3.53 % 3.53 % 22.02 % 6.06 % 6.06 % 6.34 % 2.45 % 2.45 % 2.45 % 2.45 % Expenses after incentive fees (3)(4) 8.24 % 3.53 % 3.53 % 22.02 % 6.06 % 6.06 % 6.34 % 2.45 % 2.45 % 2.45 % 2.45 % Total return before incentive fees (2) -10.28 % -9.88 % -9.83 % -15.78 % -15.41 % -15.35 % -2.46 %* -2.23 % -2.07 % -2.23 % -1.98 % Total return after incentive fees (2) -10.28 % -9.88 % -9.83 % -15.78 % -15.41 % -15.35 % -2.46 %* -2.23 % -2.07 % -2.23 % -1.98 % Incentive fee per share - - - - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2020 $ 78.59 $ 93.76 $ 126.44 $ 109.61 $ 109.24 $ 61.04 $ 72.91 $ 96.75 Net operating results: Interest income 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 Expenses (1.39 ) (0.97 ) (20.94 ) (1.13 ) (1.13 ) (0.78 ) (0.41 ) (0.54 ) Net gain/(loss) on investments, net of non-controlling interests (5.38 ) (6.46 ) 10.92 (7.58 ) (7.51 ) (6.91 ) (8.30 ) (11.01 ) Net income/(loss) (6.77 ) (7.42 ) (10.02 ) (8.71 ) (8.64 ) (7.69 ) (8.70 ) (11.55 ) Net asset value, September 30, 2020 $ 71.82 $ 86.34 $ 116.42 $ 100.90 $ 100.60 $ 53.35 $ 64.20 $ 85.20 Ratios to average net assets Net investment income/(loss) -7.30 % -4.27 % -4.27 % -4.27 % -4.27 % -5.35 % -2.32 % -2.32 % Expenses before incentive fees (3)(4) 7.31 % 4.27 % 4.27 % 4.27 % 4.27 % 5.35 % 2.32 % 2.32 % Expenses after incentive fees (3)(4) 7.31 % 4.27 % 4.27 % 4.27 % 4.27 % 5.35 % 2.32 % 2.32 % Total return before incentive fees (2) -8.61 % -7.92 % -7.92 % -7.95 % -7.91 % -12.60 % -11.93 % -11.93 % Total return after incentive fees (2) -8.61 % -7.92 % -7.92 % -7.95 % -7.91 % -12.60 % -11.93 % -11.93 % Incentive fee per share - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, June 30, 2020 $ 121.68 $ 145.35 $ 181.09 $ 96.51 $ 115.25 $ 154.24 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (2.33 ) (1.77 ) (2.20 ) (1.62 ) (1.10 ) (1.49 ) Net gain/(loss) on investments, net of non-controlling interests (15.17 ) (18.19 ) (22.67 ) (8.01 ) (9.62 ) (12.85 ) Net income/(loss) (17.50 ) (19.96 ) (24.87 ) (9.63 ) (10.72 ) (14.34 ) Net asset value, September 30, 2020 $ 104.18 $ 125.39 $ 156.22 $ 86.88 $ 104.53 $ 139.90 Ratios to average net assets Net investment income/(loss) -8.26 % -5.23 % -5.23 % -7.04 % -4.01 % -4.01 % Expenses before incentive fees (3)(4) 8.26 % 5.23 % 5.23 % 7.04 % 4.01 % 4.01 % Expenses after incentive fees (3)(4) 8.26 % 5.23 % 5.23 % 7.04 % 4.01 % 4.01 % Total return before incentive fees (2) -14.38 % -13.73 % -13.74 % -9.98 % -9.30 % -9.29 % Total return after incentive fees (2) -14.38 % -13.73 % -13.74 % -9.98 % -9.30 % -9.29 % Incentive fee per share - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2020 $ 72.68 $ 88.95 $ 83.33 $ 55.18 $ 67.54 $ 63.52 $ 85.99 $ 55.29 $ 90.21 $ 58.37 Net operating results: Interest income 0.06 0.07 0.07 0.15 0.20 0.19 0.20 0.13 0.21 0.14 Expenses (3.52 ) (2.49 ) (2.39 ) (5.34 ) (3.37 ) (3.16 ) (2.03 ) (1.28 ) (2.10 ) (1.36 ) Net gain/(loss) on investments, net of non-controlling interests (69.21 )* 4.46 4.38 (49.99 )* 10.73 10.21 14.92 10.22 15.63 10.89 Net income/(loss) (72.68 )* 2.04 2.06 (55.18 )* 7.56 7.24 13.10 9.06 13.74 9.67 Net asset value, September 30, 2021 $ - * $ 90.99 $ 85.39 $ - * $ 75.10 $ 70.76 $ 99.09 $ 64.35 $ 103.95 $ 68.04 Ratios to average net assets Net investment income/(loss) -8.89 % -5.12 % -5.12 % -18.61 % -8.50 % -8.50 % -3.80 % -3.80 % -3.80 % -3.80 % Expenses before incentive fees (3)(4) 9.04 % 5.27 % 5.27 % 19.14 % 9.03 % 9.03 % 4.22 % 4.22 % 4.22 % 4.22 % Expenses after incentive fees (3)(4) 9.04 % 5.27 % 5.27 % 19.14 % 9.03 % 9.03 % 4.22 % 4.22 % 4.22 % 4.22 % Total return before incentive fees (2) 5.06 %* 2.29 % 2.48 % 4.59 %* 11.19 % 11.39 % 15.24 % 16.39 % 15.23 % 16.57 % Total return after incentive fees (2) 5.06 %* 2.29 % 2.48 % 4.59 %* 11.19 % 11.39 % 15.24 % 16.39 % 15.23 % 16.57 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2020 $ 79.93 $ 96.81 $ 130.54 $ 113.20 $ 112.81 $ 58.55 $ 70.99 $ 94.20 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (5.36 ) (4.24 ) (5.68 ) (5.25 ) (4.83 ) (2.85 ) (1.67 ) (2.22 ) Net gain/(loss) on investments, net of non-controlling interests 10.04 12.24 16.48 14.69 14.25 11.62 14.15 18.78 Net income/(loss) 4.69 8.01 10.80 9.45 9.42 8.77 12.48 16.57 Net asset value, September 30, 2021 $ 84.62 $ 104.82 $ 141.34 $ 122.65 $ 122.23 $ 67.32 $ 83.47 $ 110.77 Ratios to average net assets Net investment income/(loss) -11.56 % -7.12 % -7.12 % -7.12 % -7.12 % -8.94 % -4.38 % -4.38 % Expenses before incentive fees (3)(4) 10.65 % 6.21 % 6.21 % 6.21 % 6.21 % 8.94 % 4.38 % 4.38 % Expenses after incentive fees (3)(4) 11.57 % 7.13 % 7.13 % 7.13 % 7.13 % 8.94 % 4.38 % 4.38 % Total return before incentive fees (2) 6.78 % 9.19 % 9.19 % 9.27 % 9.27 % 14.97 % 17.58 % 17.59 % Total return after incentive fees (2) 5.87 % 8.27 % 8.28 % 8.35 % 8.35 % 14.97 % 17.58 % 17.59 % Incentive fee per share 0.79 0.98 1.31 1.21 1.11 - - - Incentive Fee to ANA 0.92 % 0.92 % 0.92 % 0.92 % 0.92 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2020 $ 110.90 $ 167.56 $ 96.10 $ 116.50 $ 155.92 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 Expenses (6.99 ) (6.57 ) (5.57 ) (3.91 ) (5.18 ) Net gain/(loss) on investments, net of non-controlling interests 15.65 23.76 21.67 26.52 35.42 Net income/(loss) 8.66 17.19 16.10 22.60 30.25 Net asset value, September 30, 2021 $ 119.56 $ 184.75 $ 112.20 $ 139.10 $ 186.17 Ratios to average net assets Net investment income/(loss) -11.77 % -7.42 % -10.56 % -6.04 % -6.04 % Expenses before incentive fees (3)(4) 11.77 % 7.42 % 10.56 % 6.04 % 6.04 % Expenses after incentive fees (3)(4) 11.77 % 7.42 % 10.56 % 6.04 % 6.04 % Total return before incentive fees (2) 7.81 % 10.26 % 16.75 % 19.40 % 19.40 % Total return after incentive fees (2) 7.81 % 10.26 % 16.75 % 19.40 % 19.40 % Frontier Diversified Fund Frontier Masters Fund Frontier Long/Short Commodity Fund Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Class 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2019 $ 101.10 $ 121.58 $ 113.61 $ 72.28 $ 87.18 $ 81.78 $ 44.20 $ 81.60 $ 52.55 $ 85.64 $ 55.31 Net operating results: Interest income 0.02 0.03 0.02 0.08 0.10 0.10 0.07 0.13 0.08 0.13 0.09 Expenses (4.88 ) (2.82 ) (2.50 ) (11.57 ) (3.75 ) (3.52 ) (2.13 ) (1.59 ) (1.02 ) (1.67 ) (1.08 ) Net gain/(loss) on investments, net of non-controlling interests (29.76 ) (37.79 ) (35.30 ) (8.64 ) (19.99 ) (18.63 ) (42.14 )* 1.27 0.78 1.30 0.94 Net income/(loss) (34.62 ) (40.58 ) (37.78 ) (20.13 ) (23.63 ) (22.05 ) (44.20 )* (0.19 ) (0.17 ) (0.24 ) (0.05 ) Net asset value, September 30, 2020 $ 66.48 $ 81.00 $ 75.83 $ 52.15 $ 63.55 $ 59.73 $ - * $ 81.41 $ 52.39 $ 85.40 $ 55.27 Ratios to average net assets Net investment income/(loss) -10.89 % -5.35 % -5.35 % -35.07 % -9.11 % -9.11 % -9.27 % -3.53 % -3.53 % -3.53 % -3.53 % Expenses before incentive fees (3)(4) 10.94 % 5.40 % 5.40 % 35.33 % 9.37 % 9.37 % 9.58 % 3.84 % 3.84 % 3.84 % 3.84 % Expenses after incentive fees (3)(4) 10.94 % 5.40 % 5.40 % 35.33 % 9.37 % 9.37 % 9.58 % 3.84 % 3.84 % 3.84 % 3.84 % Total return before incentive fees (2) -34.25 % -33.38 % -33.25 % -27.85 % -27.11 % -26.97 % -1.62 %* -0.23 % -0.31 % -0.28 % -0.08 % Total return after incentive fees (2) -34.25 % -33.38 % -33.25 % -27.85 % -27.11 % -26.97 % -1.62 %* -0.23 % -0.31 % -0.28 % -0.08 % Incentive fee per share - - - - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Balanced Fund Frontier Select Fund Class 1 Class 1AP Class 2 Class 2a Class 3a Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2019 $ 117.23 $ 137.81 $ 185.82 $ 161.04 $ 160.50 $ 66.56 $ 78.51 $ 103.94 Net operating results: Interest income 0.04 0.04 0.06 0.05 0.05 0.00 0.00 0.00 Expenses (4.79 ) (3.21 ) (4.34 ) (3.79 ) (3.76 ) (2.61 ) (1.37 ) (1.83 ) Net gain/(loss) on investments, net of non-controlling interests (40.66 ) (48.31 ) (65.11 ) (56.40 ) (56.20 ) (10.60 ) (12.93 ) (16.92 ) Net income/(loss) (45.41 ) (51.47 ) (69.40 ) (60.14 ) (59.90 ) (13.21 ) (14.31 ) (18.74 ) Net asset value, September 30, 2020 $ 71.82 $ 86.34 $ 116.42 $ 100.90 $ 100.60 $ 53.35 $ 64.20 $ 85.20 Ratios to average net assets Net investment income/(loss) -10.42 % -5.92 % -5.92 % -5.92 % -5.92 % -8.15 % -3.64 % -3.64 % Expenses before incentive fees (3)(4) 10.50 % 6.00 % 6.00 % 6.00 % 6.00 % 8.15 % 3.64 % 3.64 % Expenses after incentive fees (3)(4) 10.50 % 6.00 % 6.00 % 6.00 % 6.00 % 8.15 % 3.64 % 3.64 % Total return before incentive fees (2) -38.74 % -37.35 % -37.35 % -37.34 % -37.32 % -19.84 % -18.22 % -18.03 % Total return after incentive fees (2) -38.74 % -37.35 % -37.35 % -37.34 % -37.32 % -19.84 % -18.22 % -18.03 % Incentive fee per share - - - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % Frontier Global Fund Frontier Heritage Fund Class 1 Class 1AP Class 2 Class 1 Class 1AP Class 2 Per unit operating performance (1) Net asset value, December 31, 2019 $ 131.52 $ 154.43 $ 192.82 $ 97.54 $ 114.15 $ 153.59 Net operating results: Interest income 0.00 0.00 0.00 0.00 0.00 0.00 Expenses (7.81 ) (5.84 ) (7.38 ) (5.22 ) (3.52 ) (4.74 ) Net gain/(loss) on investments, net of non-controlling interests (19.53 ) (23.20 ) (29.22 ) (5.44 ) (6.11 ) (8.95 ) Net income/(loss) (27.34 ) (29.04 ) (36.60 ) (10.65 ) (9.62 ) (13.69 ) Net asset value, September 30, 2020 $ 104.18 $ 125.39 $ 156.22 $ 86.88 $ 104.53 $ 139.90 Ratios to average net assets Net investment income/(loss) -12.20 % -7.68 % -7.68 % -10.42 % -5.90 % -5.90 % Expenses before incentive fees (3)(4) 12.20 % 7.68 % 7.68 % 10.42 % 5.90 % 5.90 % Expenses after incentive fees (3)(4) 12.20 % 7.68 % 7.68 % 10.42 % 5.90 % 5.90 % Total return before incentive fees (2) -20.79 % -18.80 % -18.98 % -10.92 % -8.43 % -8.91 % Total return after incentive fees (2) -20.79 % -18.80 % -18.98 % -10.92 % -8.43 % -8.91 % Incentive fee per share - - - - - - Incentive Fee to ANA 0.00 % 0.00 % 0.00 % 0.00 % 0.00 % 0.00 %
Frontier Funds [Member]
Financial Highlights (Tables) [Line Items]
Schedule of financial highlights of trust	2021 2020 Ratios to average net assets (1) Net investment income/(loss) (1) -6.27 % -5.84 % Expenses before incentive fees (3) 6.07 % -5.88 % Expenses after incentive fees (3) 6.32 % -5.88 % Total return before incentive fees (2) -0.29 % -10.08 % Total return after incentive fees (2) -0.53 % -10.08 % 2021 2020 Ratios to average net assets (1) Net investment income/(loss) (1) -6.43 % -5.70 % Expenses before incentive fees (3) 6.04 % -5.69 % Expenses after incentive fees (3) 6.47 % -5.74 % Total return before incentive fees (2) 8.81 % -36.52 % Total return after incentive fees (2) 8.37 % -36.56 %

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Derivative Instruments and Hedging Activities (Tables) [Line Items]
Schedule of averages futures contracts	Bought Sold Frontier Balanced Fund 307 392 Bought Sold Frontier Balanced Fund 600 726 Bought Sold Frontier Balanced Fund 293 322 Bought Sold Frontier Balanced Fund 578 568
Schedule of realized trading revenue from futures, forwards and options	Type of contract Frontier Balanced Fund Agriculturals $ 13,487 Currencies (20,259 ) Energies 82,010 Interest rates 5,987 Metals 155 Stock indices 12,503 Realized trading income/(loss) (1) $ 93,883 Type of contract Frontier Balanced Fund Agriculturals $ 107,606 Currencies 36,116 Energies (29,190 ) Interest rates (80,947 ) Metals 105,688 Stock indices 28,280 Realized trading income/(loss) (1) $ 167,553 Type of contract Frontier Balanced Fund Agriculturals $ 87,183 Currencies (75,797 ) Energies 133,440 Interest rates 127,666 Metals 88,709 Stock indices 213,404 Realized trading income/(loss) (1) $ 574,605 Type of contract Frontier Balanced Fund Agriculturals $ 132,659 Currencies 15,372 Energies (15,120 ) Interest rates 56,888 Metals 427,135 Stock indices (28,822 ) Realized trading income/(loss) (1) $ 588,112
Schedule of net trading gain loss	Type of contract Frontier Balanced Fund Agriculturals $ 62,335 Currencies 8,416 Energies 22,030 Interest rates (1,144 ) Metals 72,161 Stock indices (10,502 ) Change in unrealized trading income/(loss) (1) $ 153,295 Type of contract Frontier Balanced Fund Agriculturals $ (73,529 ) Currencies (12,856 ) Energies (35,050 ) Interest rates 46,611 Metals 28,731 Stock indices (7,741 ) Change in unrealized trading income/(loss) (1) $ (53,834 ) Type of contract Frontier Balanced Fund Agriculturals $ 34,336 Currencies (89,833 ) Energies 35,930 Interest rates (13,046 ) Metals 30,003 Stock indices (14,058 ) Change in unrealized trading income/(loss) (1) $ (16,668 ) Type of contract Frontier Balanced Fund Agriculturals $ (58,614 ) Currencies (27,439 ) Energies (39,325 ) Interest rates 76,647 Metals (91,914 ) Stock indices 9,775 Change in unrealized trading income/(loss) (1) $ (130,870 )
Schedule of gross and net information about the trust's assets and liabilities	Frontier Balanced Fund Gross Gross Net Open Trade Equity/(Deficit) $ 1,246,031 $ (1,161,702 ) $ 84,329 Frontier Balanced Fund Gross Gross Net Open Trade Equity/(Deficit) $ 814,743 $ (714,303 ) $ 100,440
Frontier Funds [Member]
Derivative Instruments and Hedging Activities (Tables) [Line Items]
Schedule of realized trading revenue from futures, forwards and options	Type of contract Agriculturals $ 13,487 Currencies (20,259 ) Energies 82,010 Interest rates 5,987 Metals 155 Stock indices 12,503 Realized trading income/(loss) (1) $ 93,883 Type of contract Agriculturals $ 107,606 Currencies 36,116 Energies (29,190 ) Interest rates (80,947 ) Metals 105,688 Stock indices 28,280 Realized trading income/(loss) (1) $ 167,553 Type of contract Agriculturals $ 87,183 Currencies (75,797 ) Energies 133,440 Interest rates 127,666 Metals 88,709 Stock indices 213,404 Realized trading income/(loss) (1) $ 574,605 Type of contract Agriculturals $ 132,659 Currencies 15,372 Energies (15,120 ) Interest rates 56,888 Metals 427,135 Stock indices (28,822 ) Realized trading income/(loss) (1) $ 588,112
Schedule of net trading gain loss	Type of contract Agriculturals $ 62,335 Currencies 8,416 Energies 22,030 Interest rates (1,144 ) Metals 72,161 Stock indices (10,502 ) Change in unrealized trading income/(loss) (1) $ 153,295 Type of contract Agriculturals $ (73,529 ) Currencies (12,856 ) Energies (35,050 ) Interest rates 46,611 Metals 28,731 Stock indices (7,741 ) Change in unrealized trading income/(loss) (1) $ (53,834 ) Type of contract Agriculturals $ 34,336 Currencies (89,833 ) Energies 35,930 Interest rates (13,046 ) Metals 30,003 Stock indices (14,058 ) Change in unrealized trading income/(loss) (1) $ (16,668 ) Type of contract Agriculturals $ (58,614 ) Currencies (27,439 ) Energies (39,325 ) Interest rates 76,647 Metals (91,914 ) Stock indices 9,775 Change in unrealized trading income/(loss) (1) $ (130,870 )
Schedule of gross and net information about the trust's assets and liabilities	Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented Open Trade Equity/(Deficit) $ 1,246,031 $ (1,161,702 ) $ 84,329 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented Open Trade Equity/(Deficit) $ 814,743 $ (714,303 ) $ 100,440

Condensed Schedules of Invest_3

Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) - USD ($)		Sep. 30, 2021	Dec. 31, 2020
Private Investment Companies [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 131,464
Investment Owned, % of Total Capital (Net Asset Value)	[1]	0.59%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 2,419,421
Investment Owned, % of Total Capital (Net Asset Value)	[1]	10.82%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 1,184,603
Investment Owned, % of Total Capital (Net Asset Value)	[1]	5.30%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 1,899,239
Investment Owned, % of Total Capital (Net Asset Value)	[1]	8.49%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 7,322,291
Investment Owned, % of Total Capital (Net Asset Value)	[1]	32.74%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 5,786,775
Investment Owned, % of Total Capital (Net Asset Value)	[1]	25.87%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 2,550,021
Investment Owned, % of Total Capital (Net Asset Value)	[1]	11.40%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 302,146
Investment Owned, % of Total Capital (Net Asset Value)	[1]	1.35%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 479,373
Investment Owned, % of Total Capital (Net Asset Value)	[1]	2.14%
US Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Underlying Face Amount, at Face Value	[1]	$ 116,500	$ 1,755,000
US Treasury Securities [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 143,896
Investment Owned, % of Total Capital (Net Asset Value)	[1]	0.64%
US Treasury Securities [Member] | Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 143,896
Investment Owned, % of Total Capital (Net Asset Value)	[1]	0.64%
Total Private Investment Companies [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 22,075,333
Investment Owned, % of Total Capital (Net Asset Value)	[1]	98.70%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 3,061,135	$ 3,644,603
Investment Owned, % of Total Capital (Net Asset Value)		97.47%	87.12%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 726,697	$ 1,066,074
Investment Owned, % of Total Capital (Net Asset Value)		23.14%	25.49%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 216,565	$ 414,692
Investment Owned, % of Total Capital (Net Asset Value)		6.90%	9.91%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 573,120	$ 672,766
Investment Owned, % of Total Capital (Net Asset Value)		18.25%	16.08%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 742,805	$ 732,066
Investment Owned, % of Total Capital (Net Asset Value)		23.65%	17.50%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 477,374	$ 435,119
Investment Owned, % of Total Capital (Net Asset Value)		15.20%	10.40%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 324,574	$ 323,886
Investment Owned, % of Total Capital (Net Asset Value)		10.33%	7.74%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Diversified Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 30,579	$ 16,669
Investment Owned, % of Total Capital (Net Asset Value)		0.97%	0.40%
Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 30,579	$ 16,669
Investment Owned, % of Total Capital (Net Asset Value)		0.97%	0.40%
Frontier Diversified Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 33,471	$ 427,393
Investment Owned, % of Total Capital (Net Asset Value)	[1]	1.07%	10.22%
Investment Owned, Underlying Face Amount, at Face Value	[1]	$ 116,500
Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	27,099	$ 328,604
Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | Cost [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	34,116	427,509
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 782,240	$ 1,014,591
Investment Owned, % of Total Capital (Net Asset Value)		97.07%	102.12%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 353,746	$ 486,659
Investment Owned, % of Total Capital (Net Asset Value)		43.90%	48.98%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 252,047	$ 258,609
Investment Owned, % of Total Capital (Net Asset Value)		31.28%	26.03%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 176,447	$ 269,323
Investment Owned, % of Total Capital (Net Asset Value)		21.90%	27.11%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Masters Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 16,239	$ 907
Investment Owned, % of Total Capital (Net Asset Value)		2.02%	0.09%
Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 16,239	$ 907
Investment Owned, % of Total Capital (Net Asset Value)		2.02%	0.09%
Frontier Masters Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 17,774	$ 23,245
Investment Owned, % of Total Capital (Net Asset Value)	[1]	2.21%	2.34%
Frontier Masters Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 14,390	$ 17,872
Frontier Masters Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | Cost [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	18,117	23,251
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 1,335,596	$ 738,053
Investment Owned, % of Total Capital (Net Asset Value)		94.72%	56.19%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 554,077	$ 272,294
Investment Owned, % of Total Capital (Net Asset Value)		39.30%	20.73%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	0.00%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 302,145
Investment Owned, % of Total Capital (Net Asset Value)		21.43%
Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 479,374	$ 465,759
Investment Owned, % of Total Capital (Net Asset Value)		34.00%	35.46%
Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 21,311	$ 17,736
Investment Owned, % of Total Capital (Net Asset Value)		1.51%	1.35%
Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 21,311	$ 17,736
Investment Owned, % of Total Capital (Net Asset Value)		1.51%	1.35%
Frontier Long/Short Commodity Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 23,326	$ 454,738
Investment Owned, % of Total Capital (Net Asset Value)	[1]	1.65%	34.63%
Frontier Long/Short Commodity Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 18,885	$ 349,629
Frontier Long/Short Commodity Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | Cost [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	23,775	454,862
Frontier Global Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 2,802,754	$ 3,068,656
Investment Owned, % of Total Capital (Net Asset Value)		103.99%	104.71%
Frontier Global Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 2,802,754	$ 3,068,656
Investment Owned, % of Total Capital (Net Asset Value)		103.99%	104.71%
Frontier Global Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)
Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 18,148	$ 1,083
Investment Owned, % of Total Capital (Net Asset Value)		0.67%	0.04%
Frontier Global Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 18,148	$ 1,083
Investment Owned, % of Total Capital (Net Asset Value)		0.67%	0.04%
Frontier Global Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 19,864	$ 27,742
Investment Owned, % of Total Capital (Net Asset Value)	[1]	0.74%	0.95%
Frontier Global Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 16,082	$ 21,330
Frontier Global Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | Cost [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	20,246	27,750
Frontier Heritage Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 2,564,374	$ 2,367,462
Investment Owned, % of Total Capital (Net Asset Value)		98.96%	99.25%
Frontier Heritage Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 1,657,316	$ 1,539,331
Investment Owned, % of Total Capital (Net Asset Value)		63.96%	64.53%
Frontier Heritage Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 907,058	$ 828,131
Investment Owned, % of Total Capital (Net Asset Value)		35.00%	34.72%
Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 29,586	$ 2,880
Investment Owned, % of Total Capital (Net Asset Value)		1.14%	0.12%
Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 29,586	$ 2,880
Investment Owned, % of Total Capital (Net Asset Value)		1.14%	0.12%
Frontier Heritage Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 32,384	$ 73,847
Investment Owned, % of Total Capital (Net Asset Value)	[1]	1.25%	3.10%
Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 26,218	$ 56,778
Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | Cost [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]	$ 33,007	$ 73,867
[1]	See Note 5 to the Financial Statements.

Condensed Schedules of Invest_4

Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) (Parentheticals) - US Treasury Note [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
US Treasury Securities [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost	$ 146,667
Frontier Diversified Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost	146,667
Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost		$ 2,283,228
Frontier Global Fund [Member] | US Treasury Securities [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost	$ 146,667	$ 2,283,228

Condensed Schedules of Invest_5

Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) - USD ($)		Sep. 30, 2021		Dec. 31, 2020
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 449,023
Investment Owned, % of Total Capital (Net Asset Value)				1.74%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (348,583)
Investment Owned, % of Total Capital (Net Asset Value)				(1.36%)
Frontier Funds [Member] | Open Trade Equity/(Deficit) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 100,440
Investment Owned, % of Total Capital (Net Asset Value)				0.38%
Frontier Funds [Member] | Private Investment Companies [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 23,089,312
Investment Owned, % of Total Capital (Net Asset Value)	[1]			90.31%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (262,807)
Investment Owned, % of Total Capital (Net Asset Value)		(1.17%)
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various agriculture futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (9,652)		$ 72,005
Investment Owned, % of Total Capital (Net Asset Value)		(0.04%)		0.28%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 85,119		$ 9,803
Investment Owned, % of Total Capital (Net Asset Value)		0.38%		0.04%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 43,697		$ 87,496
Investment Owned, % of Total Capital (Net Asset Value)		0.20%		0.34%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (39,727)		$ 22,858
Investment Owned, % of Total Capital (Net Asset Value)		(0.18%)		0.09%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Currency Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (481)		$ 10,573
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.04%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (15,984)
Investment Owned, % of Total Capital (Net Asset Value)		(0.07%)
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Currency Futures Contracts (Latin America) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (9,108)		$ 5,833
Investment Owned, % of Total Capital (Net Asset Value)		(0.04%)		0.02%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 7,388		$ (100)
Investment Owned, % of Total Capital (Net Asset Value)		0.03%		0.00%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various energy futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 79,410
Investment Owned, % of Total Capital (Net Asset Value)		0.36%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (334,215)		$ 148,949
Investment Owned, % of Total Capital (Net Asset Value)		(1.49%)		0.58%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (24,169)		$ 2,882
Investment Owned, % of Total Capital (Net Asset Value)		(0.11%)		0.01%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various interest rates futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (14,625)		$ 2,438
Investment Owned, % of Total Capital (Net Asset Value)		(0.07%)		0.01%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various precious metal futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (5,456)		$ 28,625
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)		0.11%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (5,437)
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (3,432)		$ 5,312
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)		0.02%
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Oceanic) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (1,626)
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (10,558)
Investment Owned, % of Total Capital (Net Asset Value)		(0.05%)
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Canada) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (3,951)
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)
LONG FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various soft futures contracts (U.S.) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 52,349
Investment Owned, % of Total Capital (Net Asset Value)				0.20%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 347,136
Investment Owned, % of Total Capital (Net Asset Value)		1.55%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various agriculture futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 3,818
Investment Owned, % of Total Capital (Net Asset Value)		0.02%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (55,212)
Investment Owned, % of Total Capital (Net Asset Value)		(0.25%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 1,372
Investment Owned, % of Total Capital (Net Asset Value)		0.01%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Currency Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 30,456
Investment Owned, % of Total Capital (Net Asset Value)		0.14%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 828
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Currency Futures Contracts (Latin America) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 20,698
Investment Owned, % of Total Capital (Net Asset Value)		0.09%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (4,750)
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various energy futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (43,480)
Investment Owned, % of Total Capital (Net Asset Value)		(0.19%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 264,970		$ (127,832)
Investment Owned, % of Total Capital (Net Asset Value)		1.18%		(0.50%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 35,149
Investment Owned, % of Total Capital (Net Asset Value)		0.16%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various interest rates futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 5,313
Investment Owned, % of Total Capital (Net Asset Value)		0.02%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various precious metal futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 67,448		$ (25,560)
Investment Owned, % of Total Capital (Net Asset Value)		0.30%		(0.10%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 8,521
Investment Owned, % of Total Capital (Net Asset Value)		0.04%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (3,340)
Investment Owned, % of Total Capital (Net Asset Value)				(0.01%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (963)
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various stock index futures contracts (Canada) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 2,986
Investment Owned, % of Total Capital (Net Asset Value)		0.01%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various soft futures contracts (U.S.) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (42,669)
Investment Owned, % of Total Capital (Net Asset Value)				(0.17%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various agriculture futures contracts (Far East) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (30,963)
Investment Owned, % of Total Capital (Net Asset Value)				(0.12%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various agriculture futures contracts (Europe) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (10,797)
Investment Owned, % of Total Capital (Net Asset Value)				(0.04%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (92,738)
Investment Owned, % of Total Capital (Net Asset Value)				(0.36%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various base metals futures contracts (U.S.) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (10,289)
Investment Owned, % of Total Capital (Net Asset Value)				(0.04%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (U.S.) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 2,300
Investment Owned, % of Total Capital (Net Asset Value)				0.01%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (Europe) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (10,381)
Investment Owned, % of Total Capital (Net Asset Value)				(0.04%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various currency futures contracts (Latin America) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 2,512
Investment Owned, % of Total Capital (Net Asset Value)				0.01%
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various interest rates futures contracts (Far East) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (2,482)
Investment Owned, % of Total Capital (Net Asset Value)				(0.01%)
SHORT FUTURES CONTRACTS [Member] | Frontier Funds [Member] | Various interest rates futures contracts (U.S.) One [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 3,656
Investment Owned, % of Total Capital (Net Asset Value)				0.01%
Open Trade Equity (Deficit) [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 84,329
Investment Owned, % of Total Capital (Net Asset Value)		0.38%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 3,377,314
Investment Owned, % of Total Capital (Net Asset Value)	[1]			13.21%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 1,996,633
Investment Owned, % of Total Capital (Net Asset Value)	[1]			7.81%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 1,654,786
Investment Owned, % of Total Capital (Net Asset Value)	[1]			6.47%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 7,427,324
Investment Owned, % of Total Capital (Net Asset Value)	[1]			29.05%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 5,363,456
Investment Owned, % of Total Capital (Net Asset Value)	[1]			20.98%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 2,715,008
Investment Owned, % of Total Capital (Net Asset Value)	[1]			10.62%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 89,029
Investment Owned, % of Total Capital (Net Asset Value)	[1]			0.35%
Private Investment Companies [Member] | Frontier Funds [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[1]			$ 465,759
Investment Owned, % of Total Capital (Net Asset Value)	[1]			1.82%
U.S. TREASURY SECURITIES [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 116,500	[2]	$ 1,755,000
U.S. TREASURY SECURITIES [Member] | Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 2,282,606
Investment Owned, % of Total Capital (Net Asset Value)				8.93%
U.S. TREASURY SECURITIES [Member] | Frontier Funds [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 9,982
Investment Owned, % of Total Capital (Net Asset Value)		0.04%
U.S. TREASURY SECURITIES [Member] | Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 2,282,606
Investment Owned, % of Total Capital (Net Asset Value)				8.93%
Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member] | Open Trade Equity (Deficit) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 100,440
Investment Owned, % of Total Capital (Net Asset Value)				0.81%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (262,807)		$ 449,023
Investment Owned, % of Total Capital (Net Asset Value)		(2.59%)		3.70%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various agriculture futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (9,652)		$ 72,005
Investment Owned, % of Total Capital (Net Asset Value)		(0.10%)		0.59%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 85,119		$ 9,803
Investment Owned, % of Total Capital (Net Asset Value)		0.84%		0.08%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 43,697		$ 87,496
Investment Owned, % of Total Capital (Net Asset Value)		0.43%		0.72%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (39,727)		$ 22,858
Investment Owned, % of Total Capital (Net Asset Value)		(0.39%)		0.19%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (481)		$ 10,573
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.09%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (15,984)
Investment Owned, % of Total Capital (Net Asset Value)		(0.16%)
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Latin America) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (9,108)		$ 5,833
Investment Owned, % of Total Capital (Net Asset Value)		(0.09%)		0.05%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 7,388		$ (100)
Investment Owned, % of Total Capital (Net Asset Value)		0.07%		0.00%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various energy futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 79,410
Investment Owned, % of Total Capital (Net Asset Value)		0.78%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (334,215)		$ 148,949
Investment Owned, % of Total Capital (Net Asset Value)		(3.30%)		1.23%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (24,169)		$ 2,882
Investment Owned, % of Total Capital (Net Asset Value)		(0.24%)		0.02%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various interest rates futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (14,625)		$ 2,438
Investment Owned, % of Total Capital (Net Asset Value)		(0.14%)		0.02%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various precious metal futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (5,456)		$ 28,625
Investment Owned, % of Total Capital (Net Asset Value)		(0.05%)		0.24%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (5,437)
Investment Owned, % of Total Capital (Net Asset Value)		(0.05%)
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (3,432)		$ 5,312
Investment Owned, % of Total Capital (Net Asset Value)		(0.03%)		0.04%
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Oceanic) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (1,626)
Investment Owned, % of Total Capital (Net Asset Value)		(0.02%)
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (10,558)
Investment Owned, % of Total Capital (Net Asset Value)		(0.10%)
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Canada) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (3,951)
Investment Owned, % of Total Capital (Net Asset Value)		(0.04%)
Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various soft futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ 52,349
Investment Owned, % of Total Capital (Net Asset Value)				0.43%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 347,136		$ (348,583)
Investment Owned, % of Total Capital (Net Asset Value)		3.42%		(2.89%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various agriculture futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 3,818		$ (30,963)
Investment Owned, % of Total Capital (Net Asset Value)		0.04%		(0.26%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (55,212)		$ (10,797)
Investment Owned, % of Total Capital (Net Asset Value)		(0.54%)		(0.09%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 1,372		$ (92,738)
Investment Owned, % of Total Capital (Net Asset Value)		0.01%		(0.77%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 9,982		$ (10,289)
Investment Owned, % of Total Capital (Net Asset Value)		0.10%		(0.08%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 30,456		$ (10,381)
Investment Owned, % of Total Capital (Net Asset Value)		0.30%		(0.09%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 828
Investment Owned, % of Total Capital (Net Asset Value)		0.01%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Latin America) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 20,698		$ 2,512
Investment Owned, % of Total Capital (Net Asset Value)		0.20%		0.02%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (4,750)		$ 2,300
Investment Owned, % of Total Capital (Net Asset Value)		(0.05%)		0.02%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various energy futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (43,480)
Investment Owned, % of Total Capital (Net Asset Value)		(0.43%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 264,970		$ (127,832)
Investment Owned, % of Total Capital (Net Asset Value)		2.61%		(1.06%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 35,149		$ (2,482)
Investment Owned, % of Total Capital (Net Asset Value)		0.35%		(0.02%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various interest rates futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 5,313		$ 3,656
Investment Owned, % of Total Capital (Net Asset Value)		0.05%		0.03%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various precious metal futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 67,448		$ (25,560)
Investment Owned, % of Total Capital (Net Asset Value)		0.67%		(0.21%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 8,521
Investment Owned, % of Total Capital (Net Asset Value)		0.08%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (3,340)
Investment Owned, % of Total Capital (Net Asset Value)				(0.03%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ (963)
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Canada) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 2,986
Investment Owned, % of Total Capital (Net Asset Value)		0.03%
Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various soft futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value				$ (42,669)
Investment Owned, % of Total Capital (Net Asset Value)				(0.35%)
Frontier Balanced Fund [Member] | Open Trade Equity (Deficit) [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value		$ 84,329
Investment Owned, % of Total Capital (Net Asset Value)		0.83%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 9,842,164		$ 10,528,252
Investment Owned, % of Total Capital (Net Asset Value)	[3]	97.06%		86.93%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 1,692,724		$ 2,311,240
Investment Owned, % of Total Capital (Net Asset Value)	[3]	16.69%		19.08%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 968,038		$ 1,581,941
Investment Owned, % of Total Capital (Net Asset Value)	[3]	9.55%		13.06%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 1,326,119		$ 982,020
Investment Owned, % of Total Capital (Net Asset Value)	[3]	13.08%		8.11%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 1,765,668		$ 1,600,611
Investment Owned, % of Total Capital (Net Asset Value)	[3]	17.41%		13.22%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 2,613,293		$ 2,612,336
Investment Owned, % of Total Capital (Net Asset Value)	[3]	25.77%		21.57%
Frontier Balanced Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 1,476,322		$ 1,440,104
Investment Owned, % of Total Capital (Net Asset Value)	[3]	14.56%		11.89%
Frontier Balanced Fund [Member] | Investment in Unconsolidated Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%
Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]			$ 49,755
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		0.41%
Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]			$ 49,755
Investment Owned, % of Total Capital (Net Asset Value)	[3]			0.41%
Frontier Balanced Fund [Member] | U.S. TREASURY SECURITIES [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[2]			$ 1,275,641
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%		10.53%
Frontier Balanced Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[2]			$ 980,787
Investment Owned, at Cost	[2]			1,275,989
Frontier Select Fund [Member] | The Series of Frontier Funds [Member] | Open Trade Equity (Deficit) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various agriculture futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Latin America) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various energy futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various interest rates futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various precious metal futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Oceanic) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Canada) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various soft futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various agriculture futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Currency Futures Contracts (Latin America) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various currency futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various energy futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various interest rates futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various precious metal futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Europe) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Far East) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various stock index futures contracts (Canada) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | The Series of Frontier Funds [Member] | Various soft futures contracts (U.S.) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
Frontier Select Fund [Member] | Open Trade Equity (Deficit) [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 1,555,606		$ 1,638,665
Investment Owned, % of Total Capital (Net Asset Value)	[3]	98.20%		99.13%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		0.00%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		0.00%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		0.00%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.00%		0.00%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 982,926		$ 956,968
Investment Owned, % of Total Capital (Net Asset Value)	[3]	62.05%		57.89%
Frontier Select Fund [Member] | Private Investment Companies [Member] | The Series of Frontier Funds [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 572,680		$ 681,697
Investment Owned, % of Total Capital (Net Asset Value)		36.15%		41.24%	[3]
Frontier Select Fund [Member] | Investment in Unconsolidated Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 15,601
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.98%
Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]	$ 15,601
Investment Owned, % of Total Capital (Net Asset Value)	[3]	0.98%		0.00%	[2]
Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | The Series of Frontier Funds [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[3]
Investment Owned, % of Total Capital (Net Asset Value)	[3]			0.00%
Frontier Select Fund [Member] | U.S. TREASURY SECURITIES [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[2]	$ 17,077
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.08%		0.00%
Frontier Select Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | The Series of Frontier Funds [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) [Line Items]
Investment Owned, Fair Value	[2]	$ 13,826
Investment Owned, at Cost	[2]	$ 17,406
[1]	See Notes to Consolidated Financial Statements, Note 5.
[2]	See Note 2 to the Financial Statements.
[3]	See Note 5 to the Financial Statements.

Condensed Schedules of Invest_6

Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) (Parentheticals) - Frontier Balanced Fund [Member] - The Series of Frontier Funds [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost		$ 2,283,228
US Treasury Securities [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost	$ 146,667
U.S. TREASURY SECURITIES [Member] | US Treasury Note [Member]
Condensed Schedules of Investments (Unaudited) (Details) - Condensed Schedule of futures contracts and investment companies (Unaudited) (Parentheticals) [Line Items]
Investment Owned, at Cost		$ 2,283,228

Organization and Purpose (Detai

Organization and Purpose (Details)	6 Months Ended	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2021
The Series of Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Managing owner contributions to the series of the trust percentage		1.00%
Service fee percentage		2.00%
Amortized monthly annual rate		2.00%
Redemption fee percentage		10.00%
Percentage of average daily NAV charged as a service fees		3.00%
Aggregate initial and ongoing service fees		9.00%
Redemption fee percentage		2.00%
Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Managing owner contributions to the series of the trust percentage		1.00%
Service fee percentage		2.00%
Percentage of NAV charged as a service fees		3.00%
Aggregate initial and ongoing service fees		9.00%
Aggregate underwriting compensation percentage	10.00%
Minimum [Member] | The Series of Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Assets normally invested in one or more trading companies		30.00%
Minimum [Member] | Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Assets normally invested in one or more trading companies		30.00%
Maximum [Member] | The Series of Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Assets normally invested in one or more trading companies		70.00%
Maximum [Member] | Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Assets normally invested in one or more trading companies		70.00%
Class 1 or Class 1a [Member] | The Series of Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Service fee percentage		2.00%
Amortized monthly annual rate		2.00%
Redemption fee percentage		2.00%
Percentage of average daily NAV charged as a service fees		3.00%
Percentage of NAV charged as a service fees		3.00%
Class 1 or Class 1a [Member] | Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Service fee percentage		2.00%
Amortized monthly annual rate		2.00%
Percentage of average daily NAV charged as a service fees		3.00%
Redemption fee percentage		2.00%
Class 2 or Class 2a [Member] | The Series of Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Service fee percentage		0.50%
Percentage of NAV charged as a service fees		0.25%
Class 2 and Class 2a [Member] | Frontier Funds [Member]
Organization and Purpose (Details) [Line Items]
Service fee percentage		0.50%
Service fee charged to limited owners		0.25%

Significant Accounting Polici_2

Significant Accounting Policies (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Managing owner percentage	2.00%
Restricted cash (in Dollars)	$ 791,090	$ 321,638
Gross income of the Trust constitutes qualifying income	90.00%
Incentive fees percentage	10.00%
Incentive fee, description	If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period for a particular series, then the Managing Owner is obligated to return any amount in excess to the Series. The returned amounts are recorded as Incentive Fee (Rebate) on the Statements of Operations.
Service fee percentage	2.00%
Amortized monthly annual rate	2.00%
Redemption fee percentage	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Gross income of the Trust constitutes qualifying income	90.00%
Service fee percentage	2.00%
Subscriptions in advance (in Dollars)	$ 665,217	638,962
Frontier Funds [Member] | Frontier Trading Company I LLC [Member]
Significant Accounting Policies (Details) [Line Items]
Restricted cash (in Dollars)	$ 791,090	$ 321,638
Class 1 or Class 1a [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Aggregate interest income percentage	100.00%
Service fee percentage	2.00%
Amortized monthly annual rate	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Class 1 or Class 1a [Member] | Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Service fee percentage	2.00%
Amortized monthly annual rate	2.00%
Redemption fee percentage	2.00%
Percentage of average daily NAV charged as a service fees	3.00%
Class 1 or Class 1a [Member] | Frontier Balanced Fund [Member] | Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Service fee percentage	3.00%
Amortized monthly annual rate	3.00%
Redemption fee percentage	3.00%
Class 2 or Class 2a [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Service fee percentage	0.50%
Frontier Diversified Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Advance for service fee (in Dollars)	$ 22,650
Frontier Long/Short Commodity Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Advance for service fee (in Dollars)	393
Frontier Masters Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Advance for service fee (in Dollars)	31,725
Frontier Balanced Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Advance for service fee (in Dollars)	363,825
Frontier Select Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Advance for service fee (in Dollars)	$ 20,766
Frontier Global Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Purchase and Sales of Private Investment Companies	$157,782
Frontier Heritage Fund [Member] | The Series of Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Advance for service fee (in Dollars)	$ 68,076
Class 1AP, Class 2a and Class 3a [Member] | Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Interest percentage	100.00%
Class 2 and Class 2a [Member] | Frontier Funds [Member]
Significant Accounting Policies (Details) [Line Items]
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%

Fair Value Measurements (Detail

Fair Value Measurements (Details)	12 Months Ended
	Dec. 31, 2020USD ($)
Swaps [Member] | Frontier Funds [Member]
Fair Value Measurements (Details) [Line Items]
Total change in unrealized appreciation (depreciation)	$ (4,384,210)

Fair Value Measurements (Deta_2

Fair Value Measurements (Details) - Schedule of financial asset portfolio measured at fair value - The Series of Frontier Funds [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Frontier Diversified Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	$ 30,579	$ 16,669
U.S. Treasury Securities	33,471	427,393
Frontier Diversified Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	30,579	16,669
U.S. Treasury Securities	33,471	427,393
Frontier Diversified Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Diversified Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Masters Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	16,239	907
U.S. Treasury Securities	17,774	23,245
Frontier Masters Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	16,239	907
U.S. Treasury Securities	17,774	23,245
Frontier Masters Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Masters Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	21,311	17,736
U.S. Treasury Securities	23,326	454,738
Frontier Long/Short Commodity Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	21,311	17,736
U.S. Treasury Securities	23,326	454,738
Frontier Long/Short Commodity Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Balanced Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies		49,755
U.S. Treasury Securities		1,275,641
Frontier Balanced Fund
Open Trade Equity (Deficit)	84,329	100,440
Frontier Balanced Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies		49,755
U.S. Treasury Securities		1,275,641
Frontier Balanced Fund
Open Trade Equity (Deficit)	84,329	100,440
Frontier Balanced Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Balanced Fund
Open Trade Equity (Deficit)
Frontier Balanced Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Balanced Fund
Open Trade Equity (Deficit)
Frontier Select Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	15,601
U.S. Treasury Securities	17,077
Frontier Select Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	15,601
U.S. Treasury Securities	17,077
Frontier Select Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Select Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Global Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	18,148	1,083
U.S. Treasury Securities	19,864	27,742
Frontier Global Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	18,148	1,083
U.S. Treasury Securities	19,864	27,742
Frontier Global Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Global Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Heritage Fund [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	29,586	2,880
U.S. Treasury Securities		73,847
Frontier Heritage Fund [Member]
Frontier Diversified Fund
U.S. Treasury Securities	32,384
Frontier Heritage Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies	29,586	2,880
U.S. Treasury Securities		73,847
Frontier Heritage Fund [Member] | Level 1 Inputs [Member]
Frontier Diversified Fund
U.S. Treasury Securities	32,384
Frontier Heritage Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Heritage Fund [Member] | Level 2 Inputs [Member]
Frontier Diversified Fund
U.S. Treasury Securities
Frontier Heritage Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Heritage Fund [Member] | Level 3 Inputs [Member]
Frontier Diversified Fund
U.S. Treasury Securities

Fair Value Measurements (Deta_3

Fair Value Measurements (Details) - Schedule of change in Level 3 assets measured at fair value on recurring basis - Level 3 Inputs [Member] - The Series of Frontier Funds [Member]	12 Months Ended
	Dec. 31, 2020USD ($)
Frontier Balanced Fund [Member] | Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets	$ 11,944,753
Total gains or losses (realized/unrealized):
Included in earnings-realized	(2,448,166)
Included in earnings-unrealized	(3,088,917)
Proceeds from collateral reduction	(6,176,555)
Sale of investments	(7,586,366)
Purchase of investments	7,355,251
Change in ownership allocation
Transfers in and/or out of Level 3
Balance of recurring Level 3 assets
Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets	362,521
Total gains or losses (realized/unrealized):
Included in earnings-realized	188,100
Included in earnings-unrealized	44,277
Proceeds from collateral reduction	(115,000)
Sale of investments	(594,898)
Purchase of investments	115,000
Change in ownership allocation
Transfers in and/or out of Level 3
Balance of recurring Level 3 assets
Frontier Diversified Fund [Member] | Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets	6,384,583
Total gains or losses (realized/unrealized):
Included in earnings-realized	(446,306)
Included in earnings-unrealized	(1,537,399)
Proceeds from collateral reduction	(4,000,000)
Sale of investments	(4,870,025)
Purchase of investments	4,469,147
Change in ownership allocation
Transfers in and/or out of Level 3
Balance of recurring Level 3 assets
Frontier Heritage Fund [Member] | Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets	2,888,009
Total gains or losses (realized/unrealized):
Included in earnings-realized	(97,745)
Included in earnings-unrealized	197,829
Proceeds from collateral reduction	(2,474,937)
Sale of investments	(1,491,965)
Purchase of investments	978,809
Change in ownership allocation
Transfers in and/or out of Level 3
Balance of recurring Level 3 assets
Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring Level 3 assets	479,024
Change in fair value of investments in unconsolidated trading companies	95,915
Proceeds from sales of investments of unconsolidated trading companies	(574,939)
Purchases of investments of unconsolidated trading companies
Total gains or losses (realized/unrealized):
Change in ownership allocation
Transfers in and/or out of Level 3
Balance of recurring Level 3 assets

Fair Value Measurements (Deta_4

Fair Value Measurements (Details) - Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments - The Series of Frontier Funds [Member]	Dec. 31, 2020USD ($)
Frontier Diversified Fund [Member]
Fair Value Measurements (Details) - Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments [Line Items]
Swap Contracts	$ (1,537,399)
Frontier Long/Short Commodity Fund [Member]
Fair Value Measurements (Details) - Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments [Line Items]
Swap Contracts	44,277
Frontier Balanced Fund [Member]
Fair Value Measurements (Details) - Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments [Line Items]
Swap Contracts	(3,088,917)
Frontier Heritage Fund [Member]
Fair Value Measurements (Details) - Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments [Line Items]
Swap Contracts	197,829
Frontier Select Fund [Member]
Fair Value Measurements (Details) - Schedule of total change in unrealized appreciation (depreciation) included in statements of operations attributable to level 3 investments [Line Items]
Investments in Unconsolidated Trading Companies	$ (91,989)

Swap Contracts (Details)

Swap Contracts (Details)	Sep. 30, 2021USD ($)
The Series of Frontier Funds [Member]
Swap Contracts (Details) [Line Items]
Cash holding shall be in excess amount	$ 250,000
Percentage of index exposure total	40.00%
Frontier Funds [Member]
Swap Contracts (Details) [Line Items]
Cash holding shall be in excess amount	$ 250,000
Percentage of index exposure total	40.00%

Swap Contracts (Details) - Sche

Swap Contracts (Details) - Schedule of investments in following swap - DeutscheBank AG [Member] - The Series of the Frontier Funds [Member] - Swap [Member]	12 Months Ended
	Dec. 31, 2020USD ($)
Frontier Balanced Fund [Member]
Swap Contracts (Details) - Schedule of investments in following swap [Line Items]
Realized Gain/(Loss)	$ (2,448,166)
Change in Unrealized Gain/(Loss)	(3,088,917)
Fair Value as of December 31, 2020	0
Advance on swap appreciation	0
Frontier Diversified Fund [Member]
Swap Contracts (Details) - Schedule of investments in following swap [Line Items]
Realized Gain/(Loss)	(446,306)
Change in Unrealized Gain/(Loss)	(1,537,399)
Fair Value as of December 31, 2020	0
Advance on swap appreciation	0
Frontier Long/Short Commodity Fund [Member]
Swap Contracts (Details) - Schedule of investments in following swap [Line Items]
Realized Gain/(Loss)	188,100
Change in Unrealized Gain/(Loss)	44,277
Fair Value as of December 31, 2020	0
Advance on swap appreciation	0
Frontier Heritage Fund [Member]
Swap Contracts (Details) - Schedule of investments in following swap [Line Items]
Realized Gain/(Loss)	(97,745)
Change in Unrealized Gain/(Loss)	197,829
Fair Value as of December 31, 2020	0
Advance on swap appreciation	$ 0

Investments in Unconsolidated_3

Investments in Unconsolidated Trading Companies and Private Investment Companies (Details)	Sep. 30, 2021	Jun. 30, 2021
The Series of Frontier Funds [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) [Line Items]
Percentage of trust’s total capital		5.00%
The Series of the Frontier Funds [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) [Line Items]
Trust’s total capital	5.00%

Investments in Unconsolidated_4

Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies - The Series of Frontier Funds [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Frontier Diversified Series [Member] | Frontier Trading Company XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.97%	0.40%
Fair Value	$ 30,579	$ 16,669
Frontier Masters Fund [Member] | Frontier Trading Company XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	2.02%	0.09%
Fair Value	$ 16,239	$ 907
Frontier Long/Short Commodity Fund [Member] | Frontier Trading Company XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	1.51%	1.35%
Fair Value	$ 21,311	$ 17,736
Frontier Balanced Fund [Member] | Frontier Trading Company XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.00%	0.41%
Fair Value		$ 49,755
Frontier Select Fund [Member] | Frontier Trading Companies XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.98%	0.00%
Fair Value	$ 15,601
Frontier Global Fund [Member] | Frontier Trading Company XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.67%	0.04%
Fair Value	$ 18,148	$ 1,083
Frontier Heritage Fund [Member] | Frontier Trading Company XXXVIII [Member]
Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of investments in unconsolidated trading companies [Line Items]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	1.14%	0.12%
Fair Value	$ 29,586	$ 2,880

Investments in Unconsolidated_5

Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies - The Series of Frontier Funds [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Frontier Balanced Fund [Member]
Frontier Balanced Fund
Trading Commissions	$ (30,728)	$ (22,645)	$ (89,197)	$ (75,678)
Realized Gain/(Loss)	323,990	(733,788)	1,071,763	(2,066,418)
Change in Unrealized Gain/(Loss)	(430,273)	(51,110)	(144,160)	81,994
Net Income (Loss)	(137,011)	(807,543)	838,406	(2,060,102)
Frontier Balanced Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(7,892)	371	(36,142)	(9,094)
Net Income (Loss)	(7,892)	371	(36,142)	(9,094)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(1,527)	(1,694)	(4,108)	(6,794)
Realized Gain/(Loss)	17,408	(175,943)	173,578	(163,459)
Change in Unrealized Gain/(Loss)	55,124	(21,260)	114,603	(16,563)
Net Income (Loss)	71,005	(198,897)	284,073	(186,816)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(2,152)
Realized Gain/(Loss)			(433)	(55,735)
Change in Unrealized Gain/(Loss)		105		25,629
Net Income (Loss)		105	(433)	(32,258)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(6,408)
Realized Gain/(Loss)			252	(718,397)
Change in Unrealized Gain/(Loss)		(5,782)		75,749
Net Income (Loss)		(5,782)	252	(649,056)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(5,970)	(4,862)	(19,136)	(20,836)
Realized Gain/(Loss)	169,823	(3,470)	464,263	(327,914)
Change in Unrealized Gain/(Loss)	(627,689)	(33,133)	(786,970)	156,749
Net Income (Loss)	(463,836)	(41,465)	(341,843)	(192,001)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(502)
Realized Gain/(Loss)			(1,910)	(232,245)
Change in Unrealized Gain/(Loss)		(21,170)		(42,835)
Net Income (Loss)		(21,170)	(1,910)	(275,582)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(3,803)	(709)	(9,204)	(9,264)
Realized Gain/(Loss)	(30,844)	(231,484)	(233,955)	(899,303)
Change in Unrealized Gain/(Loss)	222,902	107,025	56,175	157,923
Net Income (Loss)	188,255	(125,168)	(186,984)	(750,644)
Frontier Balanced Fund [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(4,627)	(3,539)	(13,536)	(5,240)
Realized Gain/(Loss)	4,082	(27,771)	121,430	28,824
Change in Unrealized Gain/(Loss)	(85,162)	22,238	(7,184)	(6,624)
Net Income (Loss)	(85,707)	(9,072)	100,710	16,960
Frontier Balanced Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(13,098)	(10,562)	(39,426)	(23,203)
Realized Gain/(Loss)	183,530	101,830	996,949	698,761
Change in Unrealized Gain/(Loss)	(9,760)	(36,659)	146,910	(196,095)
Net Income (Loss)	160,672	54,609	1,104,433	479,463
Frontier Balanced Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Frontier Balanced Fund
Trading Commissions	(1,703)	(1,279)	(3,787)	(1,279)
Realized Gain/(Loss)	(20,009)	(396,950)	(448,411)	(396,950)
Change in Unrealized Gain/(Loss)	22,204	(62,845)	368,448	(62,845)
Net Income (Loss)	492	(461,074)	(83,750)	(461,074)
Frontier Global Fund [Member]
Frontier Balanced Fund
Trading Commissions	(2,503)	(3,236)	(6,827)	(11,634)
Realized Gain/(Loss)	28,130	(317,392)	293,622	(316,235)
Change in Unrealized Gain/(Loss)	74,258	(117,407)	93,417	(197,040)
Net Income (Loss)	99,885	(438,035)	380,212	(524,909)
Frontier Global Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	829	(2,540)	13,159	(2,994)
Net Income (Loss)	829	(2,540)	13,159	(2,994)
Frontier Global Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(2,503)	(3,236)	(6,827)	(11,634)
Realized Gain/(Loss)	28,130	(317,392)	293,622	(316,235)
Change in Unrealized Gain/(Loss)	73,429	(114,867)	80,258	(194,046)
Net Income (Loss)	99,056	(435,495)	367,053	(521,915)
Frontier Select Fund [Member]
Frontier Balanced Fund
Trading Commissions	(5,563)	(3,352)	(14,924)	(12,869)
Realized Gain/(Loss)	59,364	33,407	124,562	(9,253)
Change in Unrealized Gain/(Loss)	(212)	(229,837)	195,332	(323,617)
Net Income (Loss)	53,589	(199,782)	304,970	(345,739)
Frontier Select Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(69)	(1,518)	6,956	(8,190)
Net Income (Loss)	(69)	(1,518)	6,956	(8,190)
Frontier Select Fund [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)			387
Change in Unrealized Gain/(Loss)		(587)		(2,203)
Net Income (Loss)		(587)	387	(2,203)
Frontier Select Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(4,877)	(3,352)	(13,325)	(7,477)
Realized Gain/(Loss)	67,663	33,407	321,795	228,470
Change in Unrealized Gain/(Loss)	(7,516)	(19,556)	38,851	(72,058)
Net Income (Loss)	55,270	10,499	347,321	148,935
Frontier Select Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Frontier Balanced Fund
Trading Commissions	(686)		(1,599)
Realized Gain/(Loss)	(8,299)		(198,484)
Change in Unrealized Gain/(Loss)	7,373	(205,413)	149,525	(205,413)
Net Income (Loss)	(1,612)	(205,413)	(50,558)	(205,413)
Frontier Select Fund [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(5,392)
Realized Gain/(Loss)			864	(237,723)
Change in Unrealized Gain/(Loss)		(2,763)		(35,753)
Net Income (Loss)		(2,763)	864	(278,868)
Frontier Heritage Fund [Member]
Frontier Balanced Fund
Trading Commissions	(6,130)	(4,862)	(16,520)	(11,514)
Realized Gain/(Loss)	82,842	(115,749)	463,655	64,369
Change in Unrealized Gain/(Loss)	35,016	254,454	69,490	151,754
Net Income (Loss)	111,728	133,843	516,625	204,609
Frontier Heritage Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	981	1,742	11,448	(1,582)
Net Income (Loss)	981	1,742	11,448	(1,582)
Frontier Heritage Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(1,439)	(1,524)	(3,865)	(4,298)
Realized Gain/(Loss)	16,356	(149,796)	161,521	(151,155)
Change in Unrealized Gain/(Loss)	41,181	275,381	26,673	238,686
Net Income (Loss)	56,098	124,061	184,329	83,233
Frontier Heritage Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(4,691)	(3,338)	(12,655)	(7,216)
Realized Gain/(Loss)	66,486	34,047	302,134	215,524
Change in Unrealized Gain/(Loss)	(7,146)	(22,669)	31,369	(85,350)
Net Income (Loss)	54,649	8,040	320,848	122,958
Frontier Long/Short Commodity Fund [Member]
Frontier Balanced Fund
Trading Commissions	(6,148)	(1,504)	(15,583)	(4,740)
Realized Gain/(Loss)	151,330	52,373	434,182	(90,893)
Change in Unrealized Gain/(Loss)	(125,858)	(68,066)	(191,170)	(97,425)
Net Income (Loss)	19,324	(17,197)	227,429	(193,058)
Frontier Long/Short Commodity Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(7)	(2,028)	9,914	(5,104)
Net Income (Loss)	(7)	(2,028)	9,914	(5,104)
Frontier Long/Short Commodity Fund [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(938)
Realized Gain/(Loss)			36	(103,100)
Change in Unrealized Gain/(Loss)		(882)		7,770
Net Income (Loss)		(882)	36	(96,268)
Frontier Long/Short Commodity Fund [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(120)	(306)	(543)	(978)
Realized Gain/(Loss)	26,360	40,222	152,407	(76,740)
Change in Unrealized Gain/(Loss)	(23,799)	(55,994)	(126,776)	(71,464)
Net Income (Loss)	2,441	(16,078)	25,088	(149,182)
Frontier Long/Short Commodity Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(2,730)	(1,198)	(7,233)	(2,824)
Realized Gain/(Loss)	38,119	12,151	173,929	88,947
Change in Unrealized Gain/(Loss)	(5,606)	(9,162)	14,090	(28,627)
Net Income (Loss)	29,783	1,791	180,786	57,496
Frontier Long/Short Commodity Fund [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Frontier Balanced Fund
Trading Commissions	(3,298)		(7,807)
Realized Gain/(Loss)	86,851		107,810
Change in Unrealized Gain/(Loss)	(96,446)		(88,398)
Net Income (Loss)	(12,893)		11,605
Frontier Diversified Fund [Member]
Frontier Balanced Fund
Trading Commissions	(8,799)	(9,738)	(27,871)	(42,640)
Realized Gain/(Loss)	102,837	(289,860)	291,467	(921,615)
Change in Unrealized Gain/(Loss)	(232,912)	(140,848)	(31,033)	18,829
Net Income (Loss)	(138,874)	(440,446)	232,563	(945,426)
Frontier Diversified Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(449)	(426)	2,039	2,597
Net Income (Loss)	(449)	(426)	2,039	2,597
Frontier Diversified Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(640)	(1,068)	(2,057)	(4,438)
Realized Gain/(Loss)	7,312	(107,528)	83,740	(76,179)
Change in Unrealized Gain/(Loss)	23,964	(19,659)	55,185	(9,500)
Net Income (Loss)	30,636	(128,255)	136,868	(90,117)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(1,348)
Realized Gain/(Loss)			(245)	(39,612)
Change in Unrealized Gain/(Loss)		182		17,858
Net Income (Loss)		182	(245)	(23,102)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(4,119)
Realized Gain/(Loss)			157	(463,144)
Change in Unrealized Gain/(Loss)		(3,544)		50,394
Net Income (Loss)		(3,544)	157	(416,869)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(2,513)	(2,034)	(8,665)	(13,164)
Realized Gain/(Loss)	71,506	(1,729)	136,292	(203,387)
Change in Unrealized Gain/(Loss)	(271,402)	(18,808)	(259,205)	60,454
Net Income (Loss)	(202,409)	(22,571)	(131,578)	(156,097)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(309)
Realized Gain/(Loss)			(1,166)	(144,282)
Change in Unrealized Gain/(Loss)		(9,084)		(21,773)
Net Income (Loss)		(9,084)	(1,166)	(166,364)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(870)	(271)	(2,224)	(4,112)
Realized Gain/(Loss)	(6,983)	(4,480)	(57,849)	(248,715)
Change in Unrealized Gain/(Loss)	50,260	(47,525)	6,460	(1,085)
Net Income (Loss)	42,407	(52,276)	(53,613)	(253,912)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(2,008)	(2,406)	(7,103)	(3,920)
Realized Gain/(Loss)	1,764	(18,673)	62,491	35,081
Change in Unrealized Gain/(Loss)	(37,507)	13,323	48,289	(6,574)
Net Income (Loss)	(37,751)	(7,756)	103,677	24,587
Frontier Diversified Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(2,389)	(3,320)	(6,964)	(10,591)
Realized Gain/(Loss)	33,745	40,922	172,937	416,995
Change in Unrealized Gain/(Loss)	(2,180)	(22,756)	30,463	(40,991)
Net Income (Loss)	29,176	14,846	196,436	365,413
Frontier Diversified Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Frontier Balanced Fund
Trading Commissions	(379)	(639)	(858)	(639)
Realized Gain/(Loss)	(4,507)	(198,372)	(104,890)	(198,372)
Change in Unrealized Gain/(Loss)	4,402	(32,551)	85,736	(32,551)
Net Income (Loss)	(484)	(231,562)	(20,012)	(231,562)
Frontier Diversified Fund [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)
Frontier Masters Fund [Member]
Frontier Balanced Fund
Trading Commissions	(1,762)	(2,137)	(5,196)	(9,585)
Realized Gain/(Loss)	18,679	(161,906)	58,323	(342,246)
Change in Unrealized Gain/(Loss)	12,476	(47,214)	82,700	(65,312)
Net Income (Loss)	29,393	(211,257)	135,827	(417,143)
Frontier Masters Fund [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(50)	(1,279)	9,882	(3,554)
Net Income (Loss)	(50)	(1,279)	9,882	(3,554)
Frontier Masters Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(296)	(608)	(1,068)	(2,657)
Realized Gain/(Loss)	3,396	(62,539)	39,319	(64,127)
Change in Unrealized Gain/(Loss)	11,798	(9,877)	11,837	(37,949)
Net Income (Loss)	14,898	(73,024)	50,088	(104,733)
Frontier Masters Fund [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)			(58)
Change in Unrealized Gain/(Loss)		(147)		(59)
Net Income (Loss)		(147)	(58)	(59)
Frontier Masters Fund [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(1,540)
Realized Gain/(Loss)			52	(190,409)
Change in Unrealized Gain/(Loss)		(1,242)		30,438
Net Income (Loss)		(1,242)	52	(161,511)
Frontier Masters Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Balanced Fund
Trading Commissions	(1,258)	(1,164)	(3,592)	(3,172)
Realized Gain/(Loss)	17,769	13,859	91,267	109,775
Change in Unrealized Gain/(Loss)	(1,385)	(11,510)	10,976	(20,607)
Net Income (Loss)	15,126	1,185	98,651	85,996
Frontier Masters Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Frontier Balanced Fund
Trading Commissions	(208)	(365)	(536)	(365)
Realized Gain/(Loss)	(2,486)	(113,226)	(72,777)	(113,226)
Change in Unrealized Gain/(Loss)	2,113	(22,157)	50,005	(22,157)
Net Income (Loss)	(581)	(135,748)	(23,308)	(135,748)
Frontier Masters Fund [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Frontier Balanced Fund
Trading Commissions				(1,851)
Realized Gain/(Loss)			520	(84,259)
Change in Unrealized Gain/(Loss)		(1,002)		(11,424)
Net Income (Loss)		$ (1,002)	520	(97,534)
Frontier Masters Fund [Member] | Galaxy Plus Fund - Chesapeake Feeder Fund (518) LLC [Member]
Frontier Balanced Fund
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)

Investments in Unconsolidated_6

Investments in Unconsolidated Trading Companies and Private Investment Companies (Details) - Schedule of private investment companies have certain redemption and liquidity restrictions - The Series of the Frontier Funds [Member]	9 Months Ended
	Sep. 30, 2021
Multi-Strategy [Member] | Frontier Diversified Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Diversified Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Masters Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Masters Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Long/Short Commodity Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Long/Short Commodity Fund [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Balanced Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Balanced Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Select Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Select Fund [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Frontier Heritage Fund [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Diversified Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Diversified Fund [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Diversified Fund [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Diversified Fund [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Masters Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Trend Following [Member] | Frontier Balanced Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Balanced Fund [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Balanced Fund [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Balanced Fund [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Global Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Frontier Heritage Fund [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Multi-Strategy
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

Transactions with Affiliates (D

Transactions with Affiliates (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Transactions with Affiliates (Details) [Line Items]
Trust paid for risk analysis fees (in Dollars)			$ 4,193
The Series of the Frontier Funds [Member]
Transactions with Affiliates (Details) [Line Items]
Description of range of incentive fee percentage					In each case, the embedded management fee was accrued on the relevant notional amount of the swap.
Description of service fees			Investors who have purchased Class 1 or Class 1a Units of Frontier Diversified Fund, Frontier Masters Fund, and Frontier Long/Short Commodity Fund are charged a service fee of up to two percent (2.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to two percent (2.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to two percent (2.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. Investors who have purchased Class 1 or Class 1a Units of Frontier Balanced Fund, Frontier Heritage Fund, Frontier Select Fund, and Frontier Global Fund are charged a service fee of up to three percent (3.0%) annually of the NAV (of the purchase price, in case of the initial service fee) of each Unit purchased, for the benefit of selling agents selling such Class 1 or Class 1a Units. The initial service fee, which is amortized monthly at an annual rate of up to three percent (3.0%) of the average daily NAV of Class 1 or Class 1a of such Series, is prepaid to the Managing Owner by each Series, and paid to the selling agents by the Managing Owner in the month following sale; provided, however, that investors who redeem all or a portion of their Class 1 and Class 1a Units of any Series during the first twelve (12) months following the effective date of their purchase are subject to a redemption fee of up to three percent (3.0%) of the purchase price at which such investor redeemed to reimburse the Managing Owner for the then-unamortized balance of the prepaid initial service fee. With respect to Class 2 and Class 2a Units of any Series, the Managing Owner pays an ongoing service fee to selling agents of up to one half percent (0.5%) annually of the NAV of each Class 2 or Class 2a Unit (of which 0.25% will be charged to Limited Owners holding Class 2Units of the Frontier Diversified Fund and Frontier Masters Fund or Class 2a Units of the Frontier Long/Short Commodity Fund sold) until such Class 2 or Class 2a Units which are subject to the fee limitation are reclassified as Class 3 or Class 3a Units of the applicable Series for administrative purposes. Currently the service fee is not charged to Class 1AP investors. The Managing Owner may also pay selling agents certain additional fees and expenses for administrative and other services rendered and expenses incurred by such selling agents.
Description of interest income			Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) of average net assets less any fair market value related to swaps is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (Class 1a, Class 2a and Class 3a), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series.
The Series of the Frontier Funds [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of minimum purchase commitment			1.00%
Percentage of contributes funds to trust			1.00%
Percentage of interest			1.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	$ 363,825		$ 363,825
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	393		393
The Series of the Frontier Funds [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	$ 157,782		$ 157,782
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	0.75%		0.75%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	$ 68,076		$ 68,076
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.50%		2.50%
Percentage of FCM fee	2.25%		2.25%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	$ 31,725		$ 31,725
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of FCM fee	2.25%		2.25%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	$ 22,650		$ 22,650
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Subscriptions in advance for service fee (in Dollars)	$ 20,766		$ 20,766
The Series of the Frontier Funds [Member] | Class 1AP [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of interest in specific series of trust			1.00%
Percentage of management fee	0.50%		0.50%
The Series of the Frontier Funds [Member] | Class 2a [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of interest in specific series of trust			1.00%
Percentage of management fee	0.50%		0.50%
The Series of the Frontier Funds [Member] | Class 2a [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
The Series of the Frontier Funds [Member] | Class 2a [Member] | Frontier Global Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
The Series of the Frontier Funds [Member] | Class 1 [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	0.50%		0.50%
The Series of the Frontier Funds [Member] | Class 2 [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	0.50%		0.50%
The Series of the Frontier Funds [Member] | Class 2 [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	3.50%		3.50%
The Series of the Frontier Funds [Member] | Class 3a [Member] | Frontier Balanced Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	0.50%		0.50%
The Series of the Frontier Funds [Member] | Class 3a [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
The Series of the Frontier Funds [Member] | Class 3a [Member] | Frontier Global Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
The Series of the Frontier Funds [Member] | Class 1a [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
The Series of the Frontier Funds [Member] | Class 1a [Member] | Frontier Global Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
The Series of the Frontier Funds [Member] | Class 3 [Member] | Frontier Long/Short Commodity Fund [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	3.50%		3.50%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Description of range of incentive fee percentage					(i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.
Parent Company [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of minimum purchase commitment			1.00%
Percentage of contributes funds to trust			1.00%
Subscriptions in advance for service fee (in Dollars)	$ 665,217		$ 665,217		$ 638,962
Trust had payable for management fees (in Dollars)	1,610		1,610		8,854
Trust had payable for trading fees (in Dollars)	75,283		$ 75,283		$ 81,698
Description of interest income			Aggregate interest income from all sources, including U.S. Treasury Securities assets net of premiums and cash held at clearing brokers, of up to the first 2% (annualized) is paid to the Managing Owner by the Frontier Balanced Fund (Class 1 and Class 2 only), Frontier Long/Short Commodity Fund (Class 2 and Class 3), Frontier Global Fund, Frontier Select Fund, and Frontier Heritage Fund. For the Frontier Diversified Fund, Frontier Long/Short Commodity Fund (for the three months ended September 30, 2021, and September 30, 2020 amounts received or receivable from the Managing Owner for the difference in monthly service fees from the prepaid initial service fees Class 1a, Class 2a and Class 3a), Frontier Masters Fund, and Frontier Balanced Fund (Class 1AP, Class 2a and Class 3a), 100% of the interest is retained by the respective Series.
Trust paid (in Dollars)	6,809	$ 5,196
Parent Company [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Description of range of incentive fee percentage					(i) swaps owned by Frontier Diversified Fund was 20-25% per annum, (ii) swaps owned by Frontier Balanced Fund was 20-25% per annum, (iii) swaps owned by Frontier Long/Short Commodity Fund was 25% per annum, and (iv) swaps owned by Frontier Heritage Fund was 15% per annum, and the Managing Owner has waived the entire incentive fee due to it from those Series in respect of such Series’ investment in swaps. In each case, the embedded incentive fee was accrued based on the net new trading profits of the swap.
Trust had payable for incentive fees (in Dollars)	54,924		$ 54,924		$ 0
Trust had payable for management fees (in Dollars)	1,610		1,610		8,854
Trust had payable for interest fees (in Dollars)	1,978		1,978		2,107
Trust had payable for trading fees (in Dollars)	75,283		75,283		81,698
Trust had payable for service fees (in Dollars)	32,805		32,805		$ 36,705
Trust paid for incentive fees (in Dollars)	54,924
Trust paid for management fees (in Dollars)	4,764	5,029	13,978	$ 14,753
Trust paid for risk analysis fees (in Dollars)	1,429	1,509		4,426
Trust paid for service fees (in Dollars)	110,307	128,178	342,856	483,402
Trust paid for trading fees (in Dollars)	$ 231,958	285,835	716,291	1,057,985
Trust paid for incentive fees (in Dollars)		$ 0	$ 104,764	$ 0
Parent Company [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of interest in specific series of trust			1.00%
Parent Company [Member] | Class 2a Units [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of interest			1.00%
Parent Company [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of FCM fee	2.25%		2.25%
Percentage of incentive fee	25.00%		25.00%
Parent Company [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	2.00%		2.00%
Parent Company [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 and Class 3 [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	3.50%		3.50%
Parent Company [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of series NAV	0.12%		0.12%
Parent Company [Member] | Frontier Diversified Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	0.75%		0.75%
Percentage of FCM fee	2.50%		2.50%
Percentage of incentive fee	20.00%		20.00%
Parent Company [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of FCM fee	2.25%		2.25%
Class 1 and Class 2 [Member] | Parent Company [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	0.50%		0.50%
Class 1AP, Class 2a and Class 3a [Member] | Parent Company [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of management fee	1.00%		1.00%
Class 1 [Member] | Parent Company [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of service fee	3.00%		3.00%
Class 1a Units [Member] | Parent Company [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of service fee	2.00%		2.00%
Class 2 Units [Member] | Parent Company [Member] | Managing Owner [Member]
Transactions with Affiliates (Details) [Line Items]
Percentage of service fee	0.25%		0.25%

Transactions with Affiliates _2

Transactions with Affiliates (Details) - Schedule of fees earned by managing owner - The Series of Frontier Funds [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Frontier Diversified Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees
Management Fee
Service Fee	310	2,062	1,860	12,712
Trading Fee	29,513	50,536	97,487	208,221
Frontier Masters Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees
Management Fee
Service Fee	135	407	492	1,501
Trading Fee	12,339	21,879	40,507	83,524
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees
Management Fee
Service Fee	58	108	170	330
Trading Fee	10,055	7,777	28,870	25,089
Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees	54,924		104,764
Management Fee	4,764	5,029	13,978	14,753
Service Fee	62,976	73,754	195,972	284,736
Trading Fee	108,142	127,677	332,131	465,170
Frontier Select Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees
Management Fee
Service Fee	11,949	13,025	35,191	51,117
Trading Fee	12,176	10,391	35,541	42,791
Frontier Global Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees
Management Fee
Service Fee	17,993	22,977	58,383	81,204
Trading Fee	34,334	42,481	106,684	150,154
Frontier Heritage Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees earned by managing owner [Line Items]
Incentive (Rebate) Fees
Management Fee
Service Fee	16,886	15,845	50,788	51,802
Trading Fee	$ 25,399	$ 25,094	$ 75,071	$ 83,036

Transactions with Affiliates _3

Transactions with Affiliates (Details) - Schedule of fees payable to managing owner - The Series of Frontier Funds [Member] - USD ($)	Dec. 31, 2021	Sep. 30, 2021
Frontier Diversified Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees
Management Fees
Interest Fees
Service Fees	385	85
Trading Fees	12,576	9,894
Frontier Masters Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees
Management Fees
Interest Fees
Service Fees	70	44
Trading Fees	5,460	4,220
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees
Management Fees
Interest Fees	87	37
Service Fees	18	19
Trading Fees	2,281	3,295
Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees		54,924
Management Fees	8,854	1,610
Interest Fees	1,376	1,063
Service Fees	21,381	18,384
Trading Fees	37,894	35,169
Frontier Select Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees
Management Fees
Interest Fees	179	249
Service Fees	3,709	3,698
Trading Fees	3,933	4,003
Frontier Global Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees
Management Fees
Interest Fees	326	261
Service Fees	6,348	5,525
Trading Fees	11,849	10,585
Frontier Heritage Fund [Member]
Transactions with Affiliates (Details) - Schedule of fees payable to managing owner [Line Items]
Incentive Fees
Management Fees
Interest Fees	139	368
Service Fees	4,794	5,050
Trading Fees	$ 7,705	$ 8,117

Transactions with Affiliates _4

Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner - The Series of Frontier Funds [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 6,440	$ 5,195	$ 17,394	$ 16,533
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 4	$ 6	$ 18	$ 14
Ratio to Average Net Assets	0.01%	0.02%	0.05%	0.04%
Class 2 [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 738	$ 215	$ 1,456	$ 1,074
Ratio to Average Net Assets	0.04%	0.01%	0.08%	0.04%
Class 2 [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 32	$ 54	$ 104	$ 112
Ratio to Average Net Assets	0.04%	0.08%	0.14%	0.14%
Class 2 [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 31	$ 57	$ 183	$ 208
Ratio to Average Net Assets	0.02%	0.03%	0.09%	0.07%
Class 2 [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 69	$ 235	$ 277	$ 623
Ratio to Average Net Assets	0.03%	0.06%	0.12%	0.12%
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 111	$ 158	$ 518	$ 354
Ratio to Average Net Assets	0.01%	0.02%	0.05%	0.04%
Class 1 [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 3,661	$ 1,019	$ 7,208	$ 5,419
Ratio to Average Net Assets	0.04%	0.01%	0.08%	0.04%
Class 1 [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 640	$ 1,349	$ 2,208	$ 3,081
Ratio to Average Net Assets	0.04%	0.08%	0.14%	0.14%
Class 1 [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 388	$ 901	$ 2,492	$ 2,649
Ratio to Average Net Assets	0.02%	0.03%	0.10%	0.07%
Class 1 [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 660	$ 1,151	$ 2,708	$ 2,800
Ratio to Average Net Assets	0.03%	0.05%	0.12%	0.12%
Class 1AP [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 48	$ 16	$ 96	$ 79
Ratio to Average Net Assets	0.05%	0.01%	0.09%	0.04%
Class 1AP [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 4	$ 8	$ 15	$ 15
Ratio to Average Net Assets	0.04%	0.08%	0.14%	0.14%
Class 1AP [Member] | Frontier Global Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner		$ 9		$ 24
Ratio to Average Net Assets	0.00%	0.03%	0.00%	0.07%
Class 1AP [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 2	$ 4	$ 10	$ 11
Ratio to Average Net Assets	0.02%	0.05%	0.12%	0.12%
Class 1a [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 7	$ 2
Ratio to Average Net Assets	0.01%	0.00%
Class 3a [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner	$ 45	$ 11	$ 87	$ 58
Ratio to Average Net Assets	0.01%	0.00%	0.02%	0.01%
Class 2a [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Details) - Schedule of interest paid by each series to managing owner [Line Items]
Gross Amount Paid to the Managing Owner			$ 14	$ 12
Ratio to Average Net Assets			0.02%	0.01%

Financial Highlights (Details)

Financial Highlights (Details) - Schedule of financial highlights of trust - The Series of the Frontier Funds [Member] - $ / shares		3 Months Ended			9 Months Ended
		Sep. 30, 2021		Sep. 30, 2020	Sep. 30, 2021		Sep. 30, 2020
Class 1 [Member] | Frontier Diversified Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 77.68			$ 72.68		$ 101.1
Net operating results:
Interest income	[1]	0.03			0.06		0.02
Expenses	[1]	(1.3)			(3.52)		(4.88)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(76.41)			(69.21)	[2]	(29.76)
Net income/(loss)	[1]	(77.68)			(72.68)	[2]	(34.62)
Net asset value	[1]			$ 66.48			$ 66.48
Ratios to average net assets
Net investment income/(loss)		(6.53%)			(8.89%)		(10.89%)
Expenses before incentive fees	[3],[4]	6.67%			9.04%		10.94%
Expenses after incentive fees	[3],[4]	6.67%			9.04%		10.94%
Total return before incentive fees	[5]	(1.71%)	[2]		5.06%		(34.25%)
Total return after incentive fees	[5]	(1.71%)	[2]		5.06%		(34.25%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 1 [Member] | Frontier Masters Fund [Member]
Per unit operating performance (1)
Net asset value	[1]
Net operating results:
Interest income	[1]
Expenses	[1]
Net gain/(loss) on investments, net of non-controlling interests	[1],[2]
Net income/(loss)	[1],[2]
Net asset value	[1],[2]
Ratios to average net assets
Net investment income/(loss)		0.00%
Expenses before incentive fees	[3],[4]	0.00%
Expenses after incentive fees	[3],[4]	0.00%
Total return before incentive fees	[5]	0.00%
Total return after incentive fees	[5]	0.00%
Class 1 [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 85.86
Net operating results:
Interest income	[1]	0
Expenses	[1]	(2.03)
Net gain/(loss) on investments, net of non-controlling interests	[1]	0.79
Net income/(loss)	[1]	(1.24)
Net asset value	[1]	$ 84.62			84.62
Ratios to average net assets
Net investment income/(loss)		(7.75%)
Expenses before incentive fees	[3],[4]	7.24%
Expenses after incentive fees	[3],[4]	7.75%
Total return before incentive fees	[5]	(0.93%)
Total return after incentive fees	[5]	(1.45%)
Incentive fee per share		$ 0.45
Incentive Fee to ANA		0.51%
Class 1 [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 66.17			58.55
Net operating results:
Interest income	[1]	0			0
Expenses	[1]	(1.03)			(2.85)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.18			11.62
Net income/(loss)	[1]	1.15			8.77
Net asset value	[1]	$ 67.32			$ 67.32
Ratios to average net assets
Net investment income/(loss)		(5.89%)			(8.94%)
Expenses before incentive fees	[3],[4]	5.89%			8.94%
Expenses after incentive fees	[3],[4]	5.89%			8.94%
Total return before incentive fees	[5]	1.73%			14.97%
Total return after incentive fees	[5]	1.73%			14.97%
Incentive fee per share
Incentive Fee to ANA		0.00%			0.00%
Class 1 [Member] | Frontier Global Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 117.28					$ 131.52
Net operating results:
Interest income	[1]	0					0
Expenses	[1]	(2.33)					(7.81)
Net gain/(loss) on investments, net of non-controlling interests	[1]	4.61					(19.53)
Net income/(loss)	[1]	2.28					(27.34)
Net asset value	[1]	$ 119.56		104.18	$ 119.56		$ 104.18
Ratios to average net assets
Net investment income/(loss)		(8.28%)					(12.20%)
Expenses before incentive fees	[3],[4]	8.28%					12.20%
Expenses after incentive fees	[3],[4]	8.28%					12.20%
Total return before incentive fees	[5]	1.95%					(20.79%)
Total return after incentive fees	[5]	1.95%					(20.79%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 1 [Member] | Frontier Heritage Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 109.26					$ 97.54
Net operating results:
Interest income	[1]	0					0
Expenses	[1]	(1.9)					(5.22)
Net gain/(loss) on investments, net of non-controlling interests	[1]	4.84					(5.44)
Net income/(loss)	[1]	2.94					(10.65)
Net asset value	[1]	$ 112.2		86.88	112.2		$ 86.88
Ratios to average net assets
Net investment income/(loss)		(7.05%)					(10.42%)
Expenses before incentive fees	[3],[4]	7.05%					10.42%
Expenses after incentive fees	[3],[4]	7.05%					10.42%
Total return before incentive fees	[5]	2.69%					(10.92%)
Total return after incentive fees	[5]	2.69%					(10.92%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 1 [Member] | Frontier Diversified Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			74.09
Net operating results:
Interest income	[1]			0.01
Expenses	[1]			(1.46)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(6.17)
Net income/(loss)	[1]			(7.61)
Net asset value	[1]			$ 66.48			$ 66.48
Ratios to average net assets
Net investment income/(loss)				(8.16%)
Expenses before incentive fees	[3],[4]			8.24%
Expenses after incentive fees	[3],[4]			8.24%
Total return before incentive fees	[5]			(10.28%)
Total return after incentive fees	[5]			(10.28%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1 [Member] | Frontier Masters Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 61.92	55.18		72.28
Net operating results:
Interest income	[1]			0.03	0.15		0.08
Expenses	[1]			(3.18)	(5.34)		(11.57)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(6.62)	(49.99)	[2]	(8.64)
Net income/(loss)	[1]			(9.77)	(55.18)	[2]	(20.13)
Net asset value	[1]			$ 52.15			$ 52.15
Ratios to average net assets
Net investment income/(loss)				(21.78%)	(18.61%)		(35.07%)
Expenses before incentive fees	[3],[4]			22.02%	19.14%		35.33%
Expenses after incentive fees	[3],[4]			22.02%	19.14%		35.33%
Total return before incentive fees	[5]			(15.78%)	4.59%		(27.85%)
Total return after incentive fees	[5]			(15.78%)	4.59%		(27.85%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 1 [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 78.59
Net operating results:
Interest income	[1]			0
Expenses	[1]			(1.39)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(5.38)
Net income/(loss)	[1]			(6.77)
Net asset value	[1]			$ 71.82			$ 71.82
Ratios to average net assets
Net investment income/(loss)				(7.30%)
Expenses before incentive fees	[3],[4]			7.31%
Expenses after incentive fees	[3],[4]			7.31%
Total return before incentive fees	[5]			(8.61%)
Total return after incentive fees	[5]			(8.61%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1 [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 61.04			66.56
Net operating results:
Interest income	[1]			0			0
Expenses	[1]			(0.78)			(2.61)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(6.91)			(10.6)
Net income/(loss)	[1]			(7.69)			(13.21)
Net asset value	[1]			$ 53.35			$ 53.35
Ratios to average net assets
Net investment income/(loss)				(5.35%)			(8.15%)
Expenses before incentive fees	[3],[4]			5.35%			8.15%
Expenses after incentive fees	[3],[4]			5.35%			8.15%
Total return before incentive fees	[5]			(12.60%)			(19.84%)
Total return after incentive fees	[5]			(12.60%)			(19.84%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 1 [Member] | Frontier Global Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 121.68	$ 110.9
Net operating results:
Interest income	[1]			0	0
Expenses	[1]			(2.33)	(6.99)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(15.17)	15.65
Net income/(loss)	[1]			(17.5)	8.66
Net asset value	[1]	119.56		$ 104.18	$ 119.56		$ 104.18
Ratios to average net assets
Net investment income/(loss)				(8.26%)	(11.77%)
Expenses before incentive fees	[3],[4]			8.26%	11.77%
Expenses after incentive fees	[3],[4]			8.26%	11.77%
Total return before incentive fees	[5]			(14.38%)	7.81%
Total return after incentive fees	[5]			(14.38%)	7.81%
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1 [Member] | Frontier Heritage Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 96.51	$ 96.1
Net operating results:
Interest income	[1]			0	0
Expenses	[1]			(1.62)	(5.57)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(8.01)	21.67
Net income/(loss)	[1]			(9.63)	16.1
Net asset value	[1]	112.2		$ 86.88	$ 112.2		86.88
Ratios to average net assets
Net investment income/(loss)				(7.04%)	(10.56%)
Expenses before incentive fees	[3],[4]			7.04%	10.56%
Expenses after incentive fees	[3],[4]			7.04%	10.56%
Total return before incentive fees	[5]			(9.98%)	16.75%
Total return after incentive fees	[5]			(9.98%)	16.75%
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1 [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]				$ 79.93		117.23
Net operating results:
Interest income	[1]				0		0.04
Expenses	[1]				(5.36)		(4.79)
Net gain/(loss) on investments, net of non-controlling interests	[1]				10.04		(40.66)
Net income/(loss)	[1]				4.69		(45.41)
Net asset value	[1]	84.62		$ 71.82	$ 84.62		$ 71.82
Ratios to average net assets
Net investment income/(loss)					(11.56%)		(10.42%)
Expenses before incentive fees	[3],[4]				10.65%		10.50%
Expenses after incentive fees	[3],[4]				11.57%		10.50%
Total return before incentive fees	[5]				6.78%		(38.74%)
Total return after incentive fees	[5]				5.87%		(38.74%)
Incentive fee per share					$ 0.79
Incentive Fee to ANA					0.92%		0.00%
Class 2 [Member]
Per unit operating performance (1)
Net asset value	[1]			89.88
Net operating results:
Interest income	[1]			0.02
Expenses	[1]			(0.76)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(8.14)
Net income/(loss)	[1]			(8.88)
Net asset value	[1]			$ 81			$ 81
Ratios to average net assets
Net investment income/(loss)				(3.45%)
Expenses before incentive fees	[3],[4]			3.53%
Expenses after incentive fees	[3],[4]			3.53%
Total return before incentive fees	[5]			(9.88%)
Total return after incentive fees	[5]			(9.88%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 2 [Member] | Frontier Diversified Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	95.9			$ 88.95		121.58
Net operating results:
Interest income	[1]	0.03			0.07		0.03
Expenses	[1]	(0.87)			(2.49)		(2.82)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(4.08)			4.46		(37.79)
Net income/(loss)	[1]	(4.91)			2.04		(40.58)
Net asset value	[1]	$ 90.99		$ 81	$ 90.99		$ 81
Ratios to average net assets
Net investment income/(loss)		(3.45%)			(5.12%)		(5.35%)
Expenses before incentive fees	[3],[4]	3.60%			5.27%		5.40%
Expenses after incentive fees	[3],[4]	3.60%			5.27%		5.40%
Total return before incentive fees	[5]	(5.12%)			2.29%		(33.38%)
Total return after incentive fees	[5]	(5.12%)			2.29%		(33.38%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 2 [Member] | Frontier Masters Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 73.52
Net operating results:
Interest income	[1]	0.05
Expenses	[1]	(1.1)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.63
Net income/(loss)	[1]	1.58
Net asset value	[1]	$ 75.1			$ 75.1
Ratios to average net assets
Net investment income/(loss)		(5.88%)
Expenses before incentive fees	[3],[4]	6.17%
Expenses after incentive fees	[3],[4]	6.17%
Total return before incentive fees	[5]	2.15%
Total return after incentive fees	[5]	2.15%
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 98.49
Net operating results:
Interest income	[1]	0.04
Expenses	[1]	(0.71)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.27
Net income/(loss)	[1]	0.6
Net asset value	[1]	$ 99.09			99.09
Ratios to average net assets
Net investment income/(loss)		(2.67%)
Expenses before incentive fees	[3],[4]	2.85%
Expenses after incentive fees	[3],[4]	2.85%
Total return before incentive fees	[5]	0.61%
Total return after incentive fees	[5]	0.61%
Class 2 [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 142.34
Net operating results:
Interest income	[1]	0.02
Expenses	[1]	(46.17)
Net gain/(loss) on investments, net of non-controlling interests	[1]	45.15
Net income/(loss)	[1]	(1)
Net asset value	[1]	$ 141.34			141.34
Ratios to average net assets
Net investment income/(loss)		(4.75%)
Expenses before incentive fees	[3],[4]	4.24%
Expenses after incentive fees	[3],[4]	4.75%
Total return before incentive fees	[5]	(0.19%)
Total return after incentive fees	[5]	(0.70%)
Incentive fee per share		$ 14.98
Incentive Fee to ANA		0.51%
Class 2 [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 108.07			94.2
Net operating results:
Interest income	[1]	0			0
Expenses	[1]	(0.83)			(2.22)
Net gain/(loss) on investments, net of non-controlling interests	[1]	3.52			18.78
Net income/(loss)	[1]	2.7			16.57
Net asset value	[1]	$ 110.77			$ 110.77
Ratios to average net assets
Net investment income/(loss)		(2.89%)			(4.38%)
Expenses before incentive fees	[3],[4]	2.89%			4.38%
Expenses after incentive fees	[3],[4]	2.89%			4.38%
Total return before incentive fees	[5]	2.49%			17.59%
Total return after incentive fees	[5]	2.49%			17.59%
Incentive fee per share
Incentive Fee to ANA		0.00%			0.00%
Class 2 [Member] | Frontier Global Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 179.85			$ 167.56		$ 192.82
Net operating results:
Interest income	[1]	0			0		0
Expenses	[1]	(2.29)			(6.57)		(7.38)
Net gain/(loss) on investments, net of non-controlling interests	[1]	7.19			23.76		(29.22)
Net income/(loss)	[1]	4.9			17.19		(36.6)
Net asset value	[1]	$ 184.75		156.22	$ 184.75		$ 156.22
Ratios to average net assets
Net investment income/(loss)		(5.29%)			(7.42%)		(7.68%)
Expenses before incentive fees	[3],[4]	5.29%			7.42%		7.68%
Expenses after incentive fees	[3],[4]	5.29%			7.42%		7.68%
Total return before incentive fees	[5]	2.72%			10.26%		(18.98%)
Total return after incentive fees	[5]	2.72%			10.26%		(18.98%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 2 [Member] | Frontier Heritage Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 179.93					$ 153.59
Net operating results:
Interest income	[1]	0					0
Expenses	[1]	(1.81)					(4.74)
Net gain/(loss) on investments, net of non-controlling interests	[1]	8.04					(8.95)
Net income/(loss)	[1]	6.24					(13.69)
Net asset value	[1]	$ 186.17		139.9	$ 186.17		$ 139.9
Ratios to average net assets
Net investment income/(loss)		(4.06%)					(5.90%)
Expenses before incentive fees	[3],[4]	4.06%					5.90%
Expenses after incentive fees	[3],[4]	4.06%					5.90%
Total return before incentive fees	[5]	3.47%					(8.91%)
Total return after incentive fees	[5]	3.47%					(8.91%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 2 [Member] | Frontier Masters Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			75.13	67.54		$ 87.18
Net operating results:
Interest income	[1]			0.04	0.2		0.1
Expenses	[1]			(1.05)	(3.37)		(3.75)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(10.57)	10.73		(19.99)
Net income/(loss)	[1]			(11.58)	7.56		(23.63)
Net asset value	[1]	$ 75.1		$ 63.55	$ 75.1		$ 63.55
Ratios to average net assets
Net investment income/(loss)				(5.83%)	(8.50%)		(9.11%)
Expenses before incentive fees	[3],[4]			6.06%	9.03%		9.37%
Expenses after incentive fees	[3],[4]			6.06%	9.03%		9.37%
Total return before incentive fees	[5]			(15.41%)	11.19%		(27.11%)
Total return after incentive fees	[5]			(15.41%)	11.19%		(27.11%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 2 [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 83.27	$ 85.99		$ 81.6
Net operating results:
Interest income	[1]			0.06	0.2		0.13
Expenses	[1]			(0.5)	(2.03)		(1.59)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(1.42)	14.92		1.27
Net income/(loss)	[1]			(1.86)	13.1		(0.19)
Net asset value	[1]	99.09		$ 81.41	$ 99.09		$ 81.41
Ratios to average net assets
Net investment income/(loss)				(2.17%)	(3.80%)		(3.53%)
Expenses before incentive fees	[3],[4]			2.45%	4.22%		3.84%
Expenses after incentive fees	[3],[4]			2.45%	4.22%		3.84%
Total return before incentive fees	[5]			(2.23%)	15.24%		(0.23%)
Total return after incentive fees	[5]			(2.23%)	15.24%		(0.23%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 2 [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 126.44
Net operating results:
Interest income	[1]			0.01
Expenses	[1]			(20.94)
Net gain/(loss) on investments, net of non-controlling interests	[1]			10.92
Net income/(loss)	[1]			(10.02)
Net asset value	[1]			$ 116.42			$ 116.42
Ratios to average net assets
Net investment income/(loss)				(4.27%)
Expenses before incentive fees	[3],[4]			4.27%
Expenses after incentive fees	[3],[4]			4.27%
Total return before incentive fees	[5]			(7.92%)
Total return after incentive fees	[5]			(7.92%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 2 [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 96.75			103.94
Net operating results:
Interest income	[1]			0			0
Expenses	[1]			(0.54)			(1.83)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(11.01)			(16.92)
Net income/(loss)	[1]			(11.55)			(18.74)
Net asset value	[1]			$ 85.2			$ 85.2
Ratios to average net assets
Net investment income/(loss)				(2.32%)			(3.64%)
Expenses before incentive fees	[3],[4]			2.32%			3.64%
Expenses after incentive fees	[3],[4]			2.32%			3.64%
Total return before incentive fees	[5]			(11.93%)			(18.03%)
Total return after incentive fees	[5]			(11.93%)			(18.03%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 2 [Member] | Frontier Global Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 181.09
Net operating results:
Interest income	[1]			0
Expenses	[1]			(2.2)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(22.67)
Net income/(loss)	[1]			(24.87)
Net asset value	[1]			$ 156.22			$ 156.22
Ratios to average net assets
Net investment income/(loss)				(5.23%)
Expenses before incentive fees	[3],[4]			5.23%
Expenses after incentive fees	[3],[4]			5.23%
Total return before incentive fees	[5]			(13.74%)
Total return after incentive fees	[5]			(13.74%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 2 [Member] | Frontier Heritage Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 154.24	$ 155.92
Net operating results:
Interest income	[1]			0	0
Expenses	[1]			(1.49)	(5.18)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(12.85)	35.42
Net income/(loss)	[1]			(14.34)	30.25
Net asset value	[1]	186.17		$ 139.9	$ 186.17		139.9
Ratios to average net assets
Net investment income/(loss)				(4.01%)	(6.04%)
Expenses before incentive fees	[3],[4]			4.01%	6.04%
Expenses after incentive fees	[3],[4]			4.01%	6.04%
Total return before incentive fees	[5]			(9.29%)	19.40%
Total return after incentive fees	[5]			(9.29%)	19.40%
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 2 [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]				$ 130.54		185.82
Net operating results:
Interest income	[1]				0		0.06
Expenses	[1]				(5.68)		(4.34)
Net gain/(loss) on investments, net of non-controlling interests	[1]				16.48		(65.11)
Net income/(loss)	[1]				10.8		(69.4)
Net asset value	[1]	141.34		$ 116.42	$ 141.34		$ 116.42
Ratios to average net assets
Net investment income/(loss)					(7.12%)		(5.92%)
Expenses before incentive fees	[3],[4]				6.21%		6.00%
Expenses after incentive fees	[3],[4]				7.13%		6.00%
Total return before incentive fees	[5]				9.19%		(37.35%)
Total return after incentive fees	[5]				8.28%		(37.35%)
Incentive fee per share					$ 1.31
Incentive Fee to ANA					0.92%		0.00%
Class 3 [Member] | Frontier Diversified Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	89.95			$ 83.33		$ 113.61
Net operating results:
Interest income	[1]	0.03			0.07		0.02
Expenses	[1]	(0.81)			(2.39)		(2.5)
Net gain/(loss) on investments, net of non-controlling interests	[1]	(3.77)			4.38		(35.3)
Net income/(loss)	[1]	(4.56)			2.06		(37.78)
Net asset value	[1]	$ 85.39		75.83	$ 85.39		$ 75.83
Ratios to average net assets
Net investment income/(loss)		(3.45%)			(5.12%)		(5.35%)
Expenses before incentive fees	[3],[4]	3.60%			5.27%		5.40%
Expenses after incentive fees	[3],[4]	3.60%			5.27%		5.40%
Total return before incentive fees	[5]	(5.07%)			2.48%		(33.25%)
Total return after incentive fees	[5]	(5.07%)			2.48%		(33.25%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 3 [Member] | Frontier Masters Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 69.23
Net operating results:
Interest income	[1]	0.05
Expenses	[1]	(1.09)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.57
Net income/(loss)	[1]	1.53
Net asset value	[1]	$ 70.76			$ 70.76
Ratios to average net assets
Net investment income/(loss)		(5.88%)
Expenses before incentive fees	[3],[4]	6.17%
Expenses after incentive fees	[3],[4]	6.17%
Total return before incentive fees	[5]	2.21%
Total return after incentive fees	[5]	2.21%
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 103.32
Net operating results:
Interest income	[1]	0.05
Expenses	[1]	(0.74)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.33
Net income/(loss)	[1]	0.63
Net asset value	[1]	$ 103.95			103.95
Ratios to average net assets
Net investment income/(loss)		(2.67%)
Expenses before incentive fees	[3],[4]	2.85%
Expenses after incentive fees	[3],[4]	2.85%
Total return before incentive fees	[5]	0.61%
Total return after incentive fees	[5]	0.61%
Class 3 [Member] | Frontier Diversified Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			84.09
Net operating results:
Interest income	[1]			0.02
Expenses	[1]			(0.71)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(7.57)
Net income/(loss)	[1]			(8.26)
Net asset value	[1]			$ 75.83			$ 75.83
Ratios to average net assets
Net investment income/(loss)				(3.45%)
Expenses before incentive fees	[3],[4]			3.53%
Expenses after incentive fees	[3],[4]			3.53%
Total return before incentive fees	[5]			(9.83%)
Total return after incentive fees	[5]			(9.83%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 3 [Member] | Frontier Masters Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 70.56	63.52		81.78
Net operating results:
Interest income	[1]			0.04	0.19		0.1
Expenses	[1]			(1)	(3.16)		(3.52)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(9.87)	10.21		(18.63)
Net income/(loss)	[1]			(10.83)	7.24		(22.05)
Net asset value	[1]	$ 70.76		$ 59.73	$ 70.76		$ 59.73
Ratios to average net assets
Net investment income/(loss)				(5.83%)	(8.50%)		(9.11%)
Expenses before incentive fees	[3],[4]			6.06%	9.03%		9.37%
Expenses after incentive fees	[3],[4]			6.06%	9.03%		9.37%
Total return before incentive fees	[5]			(15.35%)	11.39%		(26.97%)
Total return after incentive fees	[5]			(15.35%)	11.39%		(26.97%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 3 [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 87.35	$ 90.21		$ 85.64
Net operating results:
Interest income	[1]			0.06	0.21		0.13
Expenses	[1]			(0.52)	(2.1)		(1.67)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(1.49)	15.63		1.3
Net income/(loss)	[1]			(1.95)	13.74		(0.24)
Net asset value	[1]	103.95		$ 85.4	$ 103.95		$ 85.4
Ratios to average net assets
Net investment income/(loss)				(2.17%)	(3.80%)		(3.53%)
Expenses before incentive fees	[3],[4]			2.45%	4.22%		3.84%
Expenses after incentive fees	[3],[4]			2.45%	4.22%		3.84%
Total return before incentive fees	[5]			(2.23%)	15.23%		(0.28%)
Total return after incentive fees	[5]			(2.23%)	15.23%		(0.28%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	63.74
Net operating results:
Interest income	[1]	0.03
Expenses	[1]	(0.46)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.04
Net income/(loss)	[1]	0.61
Net asset value	[1]	$ 64.35			$ 64.35
Ratios to average net assets
Net investment income/(loss)		(2.67%)
Expenses before incentive fees	[3],[4]	2.85%
Expenses after incentive fees	[3],[4]	2.85%
Total return before incentive fees	[5]	0.96%
Total return after incentive fees	[5]	0.96%
Class 2a [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 123.47
Net operating results:
Interest income	[1]	0
Expenses	[1]	(1.99)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.17
Net income/(loss)	[1]	(0.82)
Net asset value	[1]	$ 122.65			122.65
Ratios to average net assets
Net investment income/(loss)		(4.75%)
Expenses before incentive fees	[3],[4]	4.24%
Expenses after incentive fees	[3],[4]	4.75%
Total return before incentive fees	[5]	(0.15%)
Total return after incentive fees	[5]	(0.66%)
Incentive fee per share		$ 0.64
Incentive Fee to ANA		0.51%
Class 2a [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 53.49	55.29		$ 52.55
Net operating results:
Interest income	[1]			0.04	0.13		0.08
Expenses	[1]			(0.32)	(1.28)		(1.02)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(0.82)	10.22		0.78
Net income/(loss)	[1]			(1.11)	9.06		(0.17)
Net asset value	[1]	$ 64.35		$ 52.39	$ 64.35		$ 52.39
Ratios to average net assets
Net investment income/(loss)				(2.17%)	(3.80%)		(3.53%)
Expenses before incentive fees	[3],[4]			2.45%	4.22%		3.84%
Expenses after incentive fees	[3],[4]			2.45%	4.22%		3.84%
Total return before incentive fees	[5]			(2.07%)	16.39%		(0.31%)
Total return after incentive fees	[5]			(2.07%)	16.39%		(0.31%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 2a [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 109.61
Net operating results:
Interest income	[1]			0
Expenses	[1]			(1.13)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(7.58)
Net income/(loss)	[1]			(8.71)
Net asset value	[1]			$ 100.9			$ 100.9
Ratios to average net assets
Net investment income/(loss)				(4.27%)
Expenses before incentive fees	[3],[4]			4.27%
Expenses after incentive fees	[3],[4]			4.27%
Total return before incentive fees	[5]			(7.95%)
Total return after incentive fees	[5]			(7.95%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 2a [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]				$ 113.2		161.04
Net operating results:
Interest income	[1]				0		0.05
Expenses	[1]				(5.25)		(3.79)
Net gain/(loss) on investments, net of non-controlling interests	[1]				14.69		(56.4)
Net income/(loss)	[1]				9.45		(60.14)
Net asset value	[1]	122.65		$ 100.9	$ 122.65		$ 100.9
Ratios to average net assets
Net investment income/(loss)					(7.12%)		(5.92%)
Expenses before incentive fees	[3],[4]				6.21%		6.00%
Expenses after incentive fees	[3],[4]				7.13%		6.00%
Total return before incentive fees	[5]				9.27%		(37.34%)
Total return after incentive fees	[5]				8.35%		(37.34%)
Incentive fee per share					$ 1.21
Incentive Fee to ANA					0.92%		0.00%
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	67.36
Net operating results:
Interest income	[1]	0.03
Expenses	[1]	(0.49)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.14
Net income/(loss)	[1]	0.68
Net asset value	[1]	$ 68.04			$ 68.04
Ratios to average net assets
Net investment income/(loss)		(2.67%)
Expenses before incentive fees	[3],[4]	2.85%
Expenses after incentive fees	[3],[4]	2.85%
Total return before incentive fees	[5]	1.01%
Total return after incentive fees	[5]	1.01%
Class 3a [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 123.05					$ 160.5
Net operating results:
Interest income	[1]	0					0.05
Expenses	[1]	(1.98)					(3.76)
Net gain/(loss) on investments, net of non-controlling interests	[1]	1.16					(56.2)
Net income/(loss)	[1]	(0.82)					(59.9)
Net asset value	[1]	$ 122.23		100.6	122.23		$ 100.6
Ratios to average net assets
Net investment income/(loss)		(4.75%)					(5.92%)
Expenses before incentive fees	[3],[4]	4.24%					6.00%
Expenses after incentive fees	[3],[4]	4.75%					6.00%
Total return before incentive fees	[5]	(0.15%)					(37.32%)
Total return after incentive fees	[5]	(0.67%)					(37.32%)
Incentive fee per share		$ 0.64
Incentive Fee to ANA		0.51%					0.00%
Class 3a [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			56.38	58.37		$ 55.31
Net operating results:
Interest income	[1]			0.04	0.14		0.09
Expenses	[1]			(0.34)	(1.36)		(1.08)
Net gain/(loss) on investments, net of non-controlling interests	[1]			0.82	10.89		0.94
Net income/(loss)	[1]			(1.12)	9.67		(0.05)
Net asset value	[1]	$ 68.04		$ 55.27	$ 68.04		$ 55.27
Ratios to average net assets
Net investment income/(loss)				(2.17%)	(3.80%)		(3.53%)
Expenses before incentive fees	[3],[4]			2.45%	4.22%		3.84%
Expenses after incentive fees	[3],[4]			2.45%	4.22%		3.84%
Total return before incentive fees	[5]			(1.98%)	16.57%		(0.08%)
Total return after incentive fees	[5]			(1.98%)	16.57%		(0.08%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 3a [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 109.24
Net operating results:
Interest income	[1]			0
Expenses	[1]			(1.13)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(7.51)
Net income/(loss)	[1]			(8.64)
Net asset value	[1]			$ 100.6			$ 100.6
Ratios to average net assets
Net investment income/(loss)				(4.27%)
Expenses before incentive fees	[3],[4]			4.27%
Expenses after incentive fees	[3],[4]			4.27%
Total return before incentive fees	[5]			(7.91%)
Total return after incentive fees	[5]			(7.91%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 3a [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]				$ 112.81
Net operating results:
Interest income	[1]				0
Expenses	[1]				(4.83)
Net gain/(loss) on investments, net of non-controlling interests	[1]				14.25
Net income/(loss)	[1]				9.42
Net asset value	[1]	122.23			$ 122.23
Ratios to average net assets
Net investment income/(loss)					(7.12%)
Expenses before incentive fees	[3],[4]				6.21%
Expenses after incentive fees	[3],[4]				7.13%
Total return before incentive fees	[5]				9.27%
Total return after incentive fees	[5]				8.35%
Incentive fee per share					$ 1.11
Incentive Fee to ANA					0.92%
Class 1AP [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	105.55
Net operating results:
Interest income	[1]	0
Expenses	[1]	(1.7)
Net gain/(loss) on investments, net of non-controlling interests	[1]	0.96
Net income/(loss)	[1]	(0.73)
Net asset value	[1]	$ 104.82			$ 104.82
Ratios to average net assets
Net investment income/(loss)		(4.75%)
Expenses before incentive fees	[3],[4]	4.24%
Expenses after incentive fees	[3],[4]	4.75%
Total return before incentive fees	[5]	(0.18%)
Total return after incentive fees	[5]	(0.70%)
Incentive fee per share		$ 0.55
Incentive Fee to ANA		0.51%
Class 1AP [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 81.44			70.99
Net operating results:
Interest income	[1]	0			0
Expenses	[1]	(0.62)			(1.67)
Net gain/(loss) on investments, net of non-controlling interests	[1]	2.66			14.15
Net income/(loss)	[1]	2.03			12.48
Net asset value	[1]	$ 83.47			$ 83.47
Ratios to average net assets
Net investment income/(loss)		(2.89%)			(4.38%)
Expenses before incentive fees	[3],[4]	2.89%			4.38%
Expenses after incentive fees	[3],[4]	2.89%			4.38%
Total return before incentive fees	[5]	2.49%			17.58%
Total return after incentive fees	[5]	2.49%			17.58%
Incentive fee per share
Incentive Fee to ANA		0.00%			0.00%
Class 1AP [Member] | Frontier Global Fund [Member]
Per unit operating performance (1)
Net asset value	[1]						154.43
Net operating results:
Interest income	[1]						0
Expenses	[1]						(5.84)
Net gain/(loss) on investments, net of non-controlling interests	[1]						(23.2)
Net income/(loss)	[1]						(29.04)
Net asset value	[1]			$ 125.39			$ 125.39
Ratios to average net assets
Net investment income/(loss)							(7.68%)
Expenses before incentive fees	[3],[4]						7.68%
Expenses after incentive fees	[3],[4]						7.68%
Total return before incentive fees	[5]						(18.80%)
Total return after incentive fees	[5]						(18.80%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 1AP [Member] | Frontier Heritage Fund [Member]
Per unit operating performance (1)
Net asset value	[1]	$ 134.44					$ 114.15
Net operating results:
Interest income	[1]	0					0
Expenses	[1]	(1.45)					(3.52)
Net gain/(loss) on investments, net of non-controlling interests	[1]	6.12					(6.11)
Net income/(loss)	[1]	4.66					(9.62)
Net asset value	[1]	$ 139.1		104.53	$ 139.1		$ 104.53
Ratios to average net assets
Net investment income/(loss)		(4.06%)					(5.90%)
Expenses before incentive fees	[3],[4]	4.06%					5.90%
Expenses after incentive fees	[3],[4]	4.06%					5.90%
Total return before incentive fees	[5]	3.47%					(8.43%)
Total return after incentive fees	[5]	3.47%					(8.43%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 1AP [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			93.76
Net operating results:
Interest income	[1]			0
Expenses	[1]			(0.97)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(6.46)
Net income/(loss)	[1]			(7.42)
Net asset value	[1]			$ 86.34			$ 86.34
Ratios to average net assets
Net investment income/(loss)				(4.27%)
Expenses before incentive fees	[3],[4]			4.27%
Expenses after incentive fees	[3],[4]			4.27%
Total return before incentive fees	[5]			(7.92%)
Total return after incentive fees	[5]			(7.92%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1AP [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]						78.51
Net operating results:
Interest income	[1]						0
Expenses	[1]						(1.37)
Net gain/(loss) on investments, net of non-controlling interests	[1]						(12.93)
Net income/(loss)	[1]						(14.31)
Net asset value	[1]			$ 64.2			$ 64.2
Ratios to average net assets
Net investment income/(loss)							(3.64%)
Expenses before incentive fees	[3],[4]						3.64%
Expenses after incentive fees	[3],[4]						3.64%
Total return before incentive fees	[5]						(18.22%)
Total return after incentive fees	[5]						(18.22%)
Incentive fee per share
Incentive Fee to ANA							0.00%
Class 1AP [Member] | Frontier Global Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			145.35
Net operating results:
Interest income	[1]			0
Expenses	[1]			(1.77)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(18.19)
Net income/(loss)	[1]			(19.96)
Net asset value	[1]			$ 125.39			$ 125.39
Ratios to average net assets
Net investment income/(loss)				(5.23%)
Expenses before incentive fees	[3],[4]			5.23%
Expenses after incentive fees	[3],[4]			5.23%
Total return before incentive fees	[5]			(13.73%)
Total return after incentive fees	[5]			(13.73%)
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1AP [Member] | Frontier Heritage Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 115.25	116.5
Net operating results:
Interest income	[1]			0	0
Expenses	[1]			(1.1)	(3.91)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(9.62)	26.52
Net income/(loss)	[1]			(10.72)	22.6
Net asset value	[1]	$ 139.1		$ 104.53	$ 139.1		104.53
Ratios to average net assets
Net investment income/(loss)				(4.01%)	(6.04%)
Expenses before incentive fees	[3],[4]			4.01%	6.04%
Expenses after incentive fees	[3],[4]			4.01%	6.04%
Total return before incentive fees	[5]			(9.30%)	19.40%
Total return after incentive fees	[5]			(9.30%)	19.40%
Incentive fee per share
Incentive Fee to ANA				0.00%
Class 1AP [Member] | Frontier Balanced Fund [Member]
Per unit operating performance (1)
Net asset value	[1]				$ 96.81		137.81
Net operating results:
Interest income	[1]				0		0.04
Expenses	[1]				(4.24)		(3.21)
Net gain/(loss) on investments, net of non-controlling interests	[1]				12.24		(48.31)
Net income/(loss)	[1]				8.01		(51.47)
Net asset value	[1]	$ 104.82		$ 86.34	$ 104.82		$ 86.34
Ratios to average net assets
Net investment income/(loss)					(7.12%)		(5.92%)
Expenses before incentive fees	[3],[4]				6.21%		6.00%
Expenses after incentive fees	[3],[4]				7.13%		6.00%
Total return before incentive fees	[5]				9.19%		(37.35%)
Total return after incentive fees	[5]				8.27%		(37.35%)
Incentive fee per share					$ 0.98
Incentive Fee to ANA					0.92%		0.00%
Class 1a [Member] | Frontier Long/Short Commodity Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			44.58			$ 44.2
Net operating results:
Interest income	[1]			0.03			0.07
Expenses	[1]			(0.69)			(2.13)
Net gain/(loss) on investments, net of non-controlling interests	[1],[2]			(43.93)			(42.14)
Net income/(loss)	[1],[2]			(44.58)			(44.2)
Net asset value	[1]
Ratios to average net assets
Net investment income/(loss)				(6.06%)			(9.27%)
Expenses before incentive fees	[3],[4]			6.34%			9.58%
Expenses after incentive fees	[3],[4]			6.34%			9.58%
Total return before incentive fees	[5]			(2.46%)			(1.62%)
Total return after incentive fees	[5]			(2.46%)			(1.62%)
Incentive fee per share
Incentive Fee to ANA				0.00%			0.00%
Class 1a [Member] | Frontier Select Fund [Member]
Per unit operating performance (1)
Net asset value	[1]			$ 72.91
Net operating results:
Interest income	[1]			0
Expenses	[1]			(0.41)
Net gain/(loss) on investments, net of non-controlling interests	[1]			(8.3)
Net income/(loss)	[1]			(8.7)
Net asset value	[1]			$ 64.2			$ 64.2
Ratios to average net assets
Net investment income/(loss)				(2.32%)
Expenses before incentive fees	[3],[4]			2.32%
Expenses after incentive fees	[3],[4]			2.32%
Total return before incentive fees	[5]			(11.93%)
Total return after incentive fees	[5]			(11.93%)
Incentive fee per share
Incentive Fee to ANA				0.00%
[1]	Interest income and expenses per unit are calculated by dividing these amounts by the average number of units outstanding during the period. The net gain/(loss) on investments, net of non-controlling interests is a balancing amount necessary to reconcile the change in net asset value per unit with the other per unit information.
[2]	Class 1 of Frontier Master Fund was closed as of April 1, 2021 and Frontier Diversified Fund Class 1 was closed as of July 21, 2021.
[3]	Expense ratios do not include management and incentive fees at the Galaxy Plus entities. The ratios would have been higher had those expenses been included. The impact of those fees are included in the total return.
[4]	Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Statements of Operations of the Series, see footnote 6.
[5]	Impact of incentive fee computed using average net assets, otherwise computed using average units outstanding during the period prior to the effects of any non-controlling transactions. An owner’s total returns may vary from the above returns based on the timing of contributions and withdrawals. Total returns are not annualized.

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Details) - Frontier Fund [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments and Hedging Activities (Details) [Line Items]
Monthly average of forwards, options and futures contracts bought	$ 307	$ 600	$ 293	$ 568
Monthly average of forwards, options and futures contracts sold	$ 392	$ 726	$ 322	$ 578
Minimum [Member]
Derivative Instruments and Hedging Activities (Details) [Line Items]
Percentage of embedded management fees	1.00%		1.00%
Percentage of fair value of swaps and embedded incentive fees	15.00%		15.00%
Maximum [Member]
Derivative Instruments and Hedging Activities (Details) [Line Items]
Percentage of embedded management fees	1.50%		1.50%
Percentage of fair value of swaps and embedded incentive fees	25.00%		25.00%

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities (Details) - Schedule of averages futures contracts - The Series of Frontier Funds [Member] - Frontier Balanced Fund [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments and Hedging Activities (Details) - Schedule of averages futures contracts [Line Items]
Derivative Numbers of Instruments Bought	307	600	293	578
Derivative Numbers of Instruments Sold	392	726	322	568

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities (Details) - Schedule of realized trading revenue from futures, forwards and options - Frontier Balanced Fund [Member] - Realized Trading Revenue from Futures, Forwards and Options [Member] - The Series of Frontier Funds [Member] - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)	[1]	$ 93,883	$ 167,553	$ 574,605	$ 588,112
Agriculturals [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		13,487	107,606	87,183	132,659
Currencies [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		(20,259)	36,116	(75,797)	15,372
Energies [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		82,010	(29,190)	133,440	(15,120)
Interest rates [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		5,987	(80,947)	127,666	56,888
Metals [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		155	105,688	88,709	427,135
Stock indices [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		$ 12,503	$ 28,280	$ 213,404	$ (28,822)
[1]	Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options.

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss - Frontier Balanced Fund [Member] - Unrealized Trading Revenue from Futures, Forwards and Options [Member] - The Series of the Frontier Funds [Member] - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	[1]	$ 153,295	$ (53,834)	$ (16,668)	$ (130,870)
Agriculturals [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)		62,335	(73,529)	34,336	(58,614)
Currencies [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)		8,416	(12,856)	(89,833)	(27,439)
Energies [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)		22,030	(35,050)	35,930	(39,325)
Interest rates [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)		(1,144)	46,611	(13,046)	76,647
Metals [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)		72,161	28,731	30,003	(91,914)
Stock indices [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)		$ (10,502)	$ (7,741)	$ (14,058)	$ 9,775
[1]	Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit)

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities (Details) - Schedule of gross and net information about the trust's assets and liabilities - Frontier Balanced Fund [Member] - The Series of Frontier Funds [Member] - Open Trade Equity/(Deficit) [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities (Details) - Schedule of gross and net information about the trust's assets and liabilities [Line Items]
Gross Amounts of recognized Derivative Assets/Liabilities	$ 1,246,031	$ 814,743
Gross Amounts offset in the Statements of Financial Condition	(1,161,702)	(714,303)
Net Amounts Presented in the Statements of Financial Condition	$ 84,329	$ 100,440

Trading Activities and Relate_2

Trading Activities and Related Risks (Details)	9 Months Ended
	Sep. 30, 2021
The Series of Frontier Funds [Member]
Trading Activities and Related Risks (Details) [Line Items]
Description of trading activities and related risks	If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin-to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.
Frontier Funds [Member]
Trading Activities and Related Risks (Details) [Line Items]
Description of trading activities and related risks	If the markets should move against all of the futures positions held by a Trading Company or Galaxy Plus entity in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company or Galaxy Plus entity are unable to offset such futures interests positions, such Trading Company or Galaxy Plus entity could lose all of its assets and the holders of Units of such Series would realize a 100% loss. The Managing Owner will seek to minimize market risk through real-time monitoring of open positions and the level of diversification of each Trading Advisor’s portfolio. It is anticipated that any Trading Advisor’s margin- to-equity ratio will typically not exceed approximately 35% although the actual ratio could be higher or lower from time to time.

Subsequent Events (Details)

Subsequent Events (Details)	1 Months Ended
	Nov. 04, 2021USD ($)
Frontier Balanced Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	$ 110,778
Frontier Diversified Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	19,386
Frontier Heritage Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	2,000
Frontier Long/Short Commodity Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	1,300
Frontier Masters Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	3,885
Frontier Select Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	43,866
Frontier Global Fund [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	49,473
Frontier Funds [Member]
Subsequent Events (Details) [Line Items]
Paid in redemptions	$ 230,687

Fair Value Measurements (Deta_5

Fair Value Measurements (Details) - Schedule of financial asset portfolio measured at fair value (Frontier Funds) - Frontier Funds [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Fair Value Measurements (Details) - Schedule of financial asset portfolio measured at fair value (Frontier Funds) [Line Items]
Open Trade Equity (Deficit)	$ 84,329	$ 100,440
U.S. Treasury Securities	143,896	2,282,606
Level 1 Inputs [Member]
Fair Value Measurements (Details) - Schedule of financial asset portfolio measured at fair value (Frontier Funds) [Line Items]
Open Trade Equity (Deficit)	84,329	100,440
U.S. Treasury Securities	143,896	2,282,606
Level 2 Inputs [Member]
Fair Value Measurements (Details) - Schedule of financial asset portfolio measured at fair value (Frontier Funds) [Line Items]
Open Trade Equity (Deficit)
U.S. Treasury Securities
Level 3 Inputs [Member]
Fair Value Measurements (Details) - Schedule of financial asset portfolio measured at fair value (Frontier Funds) [Line Items]
Open Trade Equity (Deficit)
U.S. Treasury Securities

Fair Value Measurements (Deta_6

Fair Value Measurements (Details) - Schedule of change in unrealized appreciation (depreciation) (Frontier Funds) - Level 3 Inputs [Member] - Frontier Funds [Member]	12 Months Ended
	Dec. 31, 2020USD ($)
Fair Value Measurements (Details) - Schedule of change in unrealized appreciation (depreciation) (Frontier Funds) [Line Items]
Balance of recurring Level 3 assets	$ 21,579,865
Total gains or losses (realized/unrealized):
Included in earnings-realized	(2,896,106)
Included in earnings-unrealized	(4,384,210)
Proceeds from collateral reduction	(12,674,502)
Purchase of investments	12,918,207
Sale of investments	(14,543,254)
Transfers in and/or out of Level 3
Balance of recurring Level 3 assets

Swap Contracts (Details) - Sc_2

Swap Contracts (Details) - Schedule of Investments in following swap - DeutscheBank AG [Member] - Swap [Member] - Parent Company [Member]	12 Months Ended
	Dec. 31, 2020USD ($)
XXXIV Balanced Select Swap [Member]
Swap Contracts (Details) - Schedule of Investments in following swap [Line Items]
Realized Gain/(Loss)	$ (2,448,166)
Change in Unrealized Gain/(Loss)	(3,088,917)
Fair Value as of December 31, 2020	0
Advance on swap appreciation	0
XXXV Diversified Select Swap [Member]
Swap Contracts (Details) - Schedule of Investments in following swap [Line Items]
Realized Gain/(Loss)	(446,306)
Change in Unrealized Gain/(Loss)	(1,537,399)
Fair Value as of December 31, 2020	0
Advance on swap appreciation	0
XXXVII L/S Select Swap [Member]
Swap Contracts (Details) - Schedule of Investments in following swap [Line Items]
Realized Gain/(Loss)	188,100
Change in Unrealized Gain/(Loss)	44,277
Fair Value as of December 31, 2020	0
Advance on swap appreciation	0
Brevan Howard [Member]
Swap Contracts (Details) - Schedule of Investments in following swap [Line Items]
Realized Gain/(Loss)	(189,734)
Change in Unrealized Gain/(Loss)	197,829
Fair Value as of December 31, 2020	0
Advance on swap appreciation	$ 0

Investments in Private Investme

Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies - Frontier Funds [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	$ (61,633)	$ (47,474)	$ (176,118)	$ (168,660)
Realized Gain/(Loss)	767,172	(1,532,915)	2,737,574	(3,682,291)
Change in Unrealized Gain/(Loss)	(662,695)	(474,442)	100,206	(482,988)
Net Income (Loss)	42,844	(2,054,831)	2,661,662	(4,333,939)
Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(6,405)	(8,130)	(17,925)	(29,821)
Realized Gain/(Loss)	72,602	(813,198)	751,780	(771,155)
Change in Unrealized Gain/(Loss)	205,496	109,718	288,555	(19,372)
Net Income (Loss)	271,693	(711,610)	1,022,410	(820,348)
Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions				(3,500)
Realized Gain/(Loss)			(349)	(95,347)
Change in Unrealized Gain/(Loss)		(447)		41,225
Net Income (Loss)		(447)	(349)	(57,622)
Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions				(13,005)
Realized Gain/(Loss)			497	(1,475,050)
Change in Unrealized Gain/(Loss)		(11,450)		164,351
Net Income (Loss)		(11,450)	497	(1,323,704)
Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(8,483)	(6,896)	(27,801)	(34,000)
Realized Gain/(Loss)	241,329	(5,199)	600,555	(531,301)
Change in Unrealized Gain/(Loss)	(899,091)	(51,941)	(1,046,175)	217,203
Net Income (Loss)	(666,245)	(64,036)	(473,421)	(348,098)
Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(120)	(306)	(543)	(1,789)
Realized Gain/(Loss)	26,360	40,222	149,331	(453,267)
Change in Unrealized Gain/(Loss)	(23,799)	(86,248)	(126,776)	(136,072)
Net Income (Loss)	2,441	(46,332)	22,012	(591,128)
Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(4,673)	(980)	(11,428)	(13,376)
Realized Gain/(Loss)	(37,827)	(235,964)	(291,804)	(1,148,018)
Change in Unrealized Gain/(Loss)	273,162	59,500	62,635	156,838
Net Income (Loss)	230,662	(177,444)	(240,597)	(1,004,556)
Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)
Net Income (Loss)
Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(6,635)	(5,945)	(20,639)	(9,160)
Realized Gain/(Loss)	5,846	(46,444)	183,921	63,905
Change in Unrealized Gain/(Loss)	(122,669)	35,561	41,105	(13,198)
Net Income (Loss)	(123,458)	(16,828)	204,387	41,547
Galaxy Plus Fund - Quest FIT Feeder Fund (535) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions
Realized Gain/(Loss)
Change in Unrealized Gain/(Loss)	(1,847)	(80,092)	42,887	(80,092)
Net Income (Loss)	(1,847)	(80,092)	42,887	(80,092)
Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions				(7,243)
Realized Gain/(Loss)			1,384	(321,982)
Change in Unrealized Gain/(Loss)		(3,765)		(47,177)
Net Income (Loss)		(3,765)	1,384	(376,402)
Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(29,043)	(22,934)	(83,195)	(54,483)
Realized Gain/(Loss)	407,312	236,216	2,059,011	1,758,472
Change in Unrealized Gain/(Loss)	(33,593)	(122,312)	272,659	(443,728)
Net Income (Loss)	344,676	90,970	2,248,475	1,260,261
Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(2,976)	(2,283)	(6,780)	(2,283)
Realized Gain/(Loss)	(35,301)	(708,548)	(824,562)	(708,548)
Change in Unrealized Gain/(Loss)	36,092	(322,966)	653,714	(322,966)
Net Income (Loss)	(2,185)	(1,033,797)	(177,628)	(1,033,797)
Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Investments in Private Investment Companies (Details) - Schedule of equity in earnings from unconsolidated trading companies and private investment companies [Line Items]
Trading Commissions	(3,298)		(7,807)
Realized Gain/(Loss)	86,851		107,810
Change in Unrealized Gain/(Loss)	(96,446)		(88,398)
Net Income (Loss)	$ (12,893)		$ 11,605

Investments in Private Invest_2

Investments in Private Investment Companies (Details) - Schedule of private investment companies have certain redemption and liquidity restrictions - Frontier Funds [Member]	9 Months Ended
	Sep. 30, 2021
Multi-Strategy [Member] | Galaxy Plus Fund – JL Cyril Systematic Feeder Fund (547) LLC) [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund – Volt Diversified Alpha Feeder Fund (550) LLC) [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Frontier Funds
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

Financial Highlights (Details_2

Financial Highlights (Details) - Schedule of financial highlights of trust - Frontier Funds [Member]		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Ratios to average net assets (1)
Net investment income/(loss)	[1]	(6.27%)	(5.84%)	(6.43%)	(5.70%)
Expenses before incentive fees	[2]	6.07%	(5.88%)	6.04%	(5.69%)
Expenses after incentive fees	[2]	6.32%	(5.88%)	6.47%	(5.74%)
Total return before incentive fees	[3]	(0.29%)	(10.08%)	8.81%	(36.52%)
Total return after incentive fees	[3]	(0.53%)	(10.08%)	8.37%	(36.56%)
[1]	Annualized with the exception of incentive fees.
[2]	Expense ratios do not reflect interest allocated to the Managing Owner as such expenses are not included in the Consolidated Statements of Operations of the Trust. See footnote 5.
[3]	Total returns are not annualized.

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss - Realized Trading Revenue from Futures, Forwards and Options [Member] - Frontier Funds [Member] - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)	[1]	$ 93,883	$ 167,553	$ 574,605	$ 588,112
Agriculturals [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		13,487	107,606	87,183	132,659
Currencies [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		(20,259)	36,116	(75,797)	15,372
Energies [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		82,010	(29,190)	133,440	(15,120)
Interest rates [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		5,987	(80,947)	127,666	56,888
Metals [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		155	105,688	88,709	427,135
Stock indices [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized trading income/(loss)		$ 12,503	$ 28,280	$ 213,404	$ (28,822)
[1]	Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options.

Derivative Instruments and He_9

Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss - Net Change in Open Trade Equity from Futures, Forwards and Options [Member] - Frontier Fund [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	$ 153,295	$ (53,834)	$ (16,668)	$ (130,870)
Agriculturals [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	62,335	(73,529)	34,336	(58,614)
Currencies [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	8,416	(12,856)	(89,833)	(27,439)
Energies [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	22,030	(35,050)	35,930	(39,325)
Interest rates [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	(1,144)	46,611	(13,046)	76,647
Metals [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	72,161	28,731	30,003	(91,914)
Stock indices [Member]
Derivative Instruments and Hedging Activities (Details) - Schedule of net trading gain loss [Line Items]
Change in unrealized trading income/(loss)	$ (10,502)	$ (7,741)	$ (14,058)	$ 9,775

Derivative Instruments and H_10

Derivative Instruments and Hedging Activities (Details) - Schedule of gross and net information about the Trust's assets and liabilities - Frontier Funds [Member] - Open Trade Equity/(Deficit) [Member] - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities (Details) - Schedule of gross and net information about the Trust's assets and liabilities [Line Items]
Gross Amounts of recognized Derivative Assets	$ 1,246,031	$ 814,743
Gross Amounts offset in the Statements of Financial Condition	(1,161,702)	(714,303)
Net Amounts Presented in the Statements of Financial	$ 84,329	$ 100,440