Frontier Long/Short Commodity Fund 10-K 30 Mar 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 25, 2020
Document And Entity Information
Entity Registrant Name	Frontier Funds
Entity Central Index Key	0001261379
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity File Number	000-51274
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		0
Entity Public Float	$ 0
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019

Statements of Financial Conditi

Statements of Financial Condition (unaudited) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
OWNERS CAPITAL
Total Capital	$ 48,556,593	$ 72,012,782
Frontier Funds [Member]
ASSETS
Cash and cash equivalents	367,568	1,729,879
U.S. Treasury securities, at fair value	650,728	5,684,327
Receivable from futures commission merchants	2,526,242	11,255,848
Open trade equity, at fair value	116,184
Incentive fee receivable		78,845
Swap contracts, at fair value	21,579,865	20,149,868
Investments in private investment companies, at fair value	35,926,037	46,557,428
Interest receivable	13,363	117,168
Receivable from related parties	11,453
Redemptions receivable from private investment companies	552,017
Other assets	5,700
Total Assets	61,749,157	85,573,363
LIABILITIES
Open trade deficit, at fair value		398,189
Redemptions payable	133,633
Owner redemptions payable		23,759
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner	8,795	78,045
Interest payable to Managing Owner	327	10,852
Service fees payable to Managing Owner	68,762	96,152
Trading fees payable to Managing Owner	160,907	222,241
Risk analysis fees payable	8,465	27,562
Advance on unrealized Swap Appreciation	12,191,555	12,191,555
Subscriptions in advance for service fee rebates	598,042	497,326
Other liabilities	22,078	4,003
Total Liabilities	13,192,564	13,560,581
OWNERS CAPITAL
Managing Owner Units	487,974	851,595
Limited Owner Units	48,068,619	71,161,187
Total Owners' Capital	48,556,593	72,012,782
Total Liabilities and Owners Capital	61,749,157	85,573,363
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
ASSETS
Cash and cash equivalents	56,263	472,695
U.S. Treasury securities, at fair value	99,605	1,553,261
Incentive fee receivable		17,277
Swap contracts, at fair value	6,384,583	5,920,414
Investments in private investment companies, at fair value	9,305,733	11,084,463
Investments in unconsolidated trading companies, at fair value	24,150	1,160,910
Interest receivable	2,027	32,017
Receivable from related parties	11,453
Redemptions receivable from private investment companies	171,906
Other assets	5,700
Total Assets	16,061,420	20,241,037
LIABILITIES
Redemptions payable
Incentive fees payable to Managing Owner		10,897
Management fees payable to Managing Owner		3,875
Interest payable to Managing Owner
Service fees payable to Managing Owner	3,392	4,498
Trading fees payable to Managing Owner	35,877	44,827
Advance on unrealized Swap Appreciation	4,000,000	4,000,000
Subscriptions in advance for service fee rebates	22,531	20,430
Other liabilities
Total Liabilities	4,061,800	4,084,527
OWNERS CAPITAL
Total Owners' Capital	11,999,620	16,156,510
Non-Controlling Interests
Total Capital	11,999,620	16,156,510
Total Liabilities and Owners Capital	16,061,420	20,241,037
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	3,023	3,005
Limited Owner Units	$ 5,597,828	$ 7,669,749
Units Outstanding	46,067	63,494
Net Asset Value per Unit	$ 121.58	$ 120.84
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2a [Member]
OWNERS CAPITAL
Managing Owner Units
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3 [Member]
OWNERS CAPITAL
Managing Owner Units	115,933	172,426
Limited Owner Units	$ 4,979,641	$ 6,607,774
Units Outstanding	44,853	60,202
Net Asset Value per Unit	$ 113.61	$ 112.62
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3a [Member]
OWNERS CAPITAL
Managing Owner Units
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units	$ 1,303,195	$ 1,703,556
Units Outstanding	12,890	16,661
Net Asset Value per Unit	$ 102.72	$ 102.25
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1a [Member]
OWNERS CAPITAL
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
ASSETS
Cash and cash equivalents	34,272	61,600
U.S. Treasury securities, at fair value	60,673	202,415
Incentive fee receivable		60,871
Swap contracts, at fair value	362,521	479,102
Investments in private investment companies, at fair value	986,757	1,729,241
Investments in unconsolidated trading companies, at fair value	14,711	28,163
Interest receivable	1,296	4,172
Receivable from related parties
Redemptions receivable from private investment companies
Other assets
Total Assets	1,460,230	2,565,564
LIABILITIES
Redemptions payable	6,585
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner
Interest payable to Managing Owner
Service fees payable to Managing Owner		51
Trading fees payable to Managing Owner	3,468	5,306
Advance on unrealized Swap Appreciation	115,000	115,000
Subscriptions in advance for service fee rebates	220
Other liabilities	667
Total Liabilities	125,940	120,357
OWNERS CAPITAL
Total Owners' Capital	1,334,290	2,445,207
Non-Controlling Interests
Total Capital	1,334,290	2,445,207
Total Liabilities and Owners Capital	1,460,230	2,565,564
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	4,530	5,998
Limited Owner Units	$ 36,515	$ 78,098
Units Outstanding	503	851
Net Asset Value per Unit	$ 81.60	$ 98.82
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
OWNERS CAPITAL
Managing Owner Units	$ 7,861	$ 20,484
Limited Owner Units	$ 73,965	$ 165,985
Units Outstanding	1,557	2,803
Net Asset Value per Unit	$ 52.55	$ 66.52
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
OWNERS CAPITAL
Managing Owner Units
Limited Owner Units	$ 991,828	$ 1,791,417
Units Outstanding	11,581	17,282
Net Asset Value per Unit	$ 85.64	$ 103.66
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
OWNERS CAPITAL
Managing Owner Units	$ 993	$ 1,253
Limited Owner Units	$ 207,151	$ 361,921
Units Outstanding	3,763	5,201
Net Asset Value per Unit	$ 55.31	$ 69.83
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
OWNERS CAPITAL
Limited Owner Units	$ 11,447	$ 20,051
Units Outstanding	259	353
Net Asset Value per Unit	$ 44.20	$ 56.80
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
ASSETS
Cash and cash equivalents	$ 25,639	$ 46,374
U.S. Treasury securities, at fair value	45,391	152,384
Incentive fee receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	2,198,997	4,661,327
Investments in unconsolidated trading companies, at fair value	11,005	775,088
Interest receivable	924	3,141
Receivable from related parties
Redemptions receivable from private investment companies
Other assets
Total Assets	2,281,956	5,638,314
LIABILITIES
Redemptions payable
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner		8,347
Interest payable to Managing Owner
Service fees payable to Managing Owner	204	1,750
Trading fees payable to Managing Owner	11,673	27,984
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	31,541	28,100
Other liabilities	499
Total Liabilities	43,917	66,181
OWNERS CAPITAL
Total Owners' Capital	2,238,039	5,572,133
Non-Controlling Interests
Total Capital	2,238,039	5,572,133
Total Liabilities and Owners Capital	2,281,956	5,638,314
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	13,043	51,365
Limited Owner Units	$ 837,765	$ 1,241,610
Units Outstanding	9,759	12,008
Net Asset Value per Unit	$ 87.18	$ 107.68
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 2a [Member]
OWNERS CAPITAL
Managing Owner Units
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 3 [Member]
OWNERS CAPITAL
Managing Owner Units	9,228	20,019
Limited Owner Units	$ 1,365,209	$ 2,774,661
Units Outstanding	16,806	27,734
Net Asset Value per Unit	$ 81.78	$ 100.77
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 3a [Member]
OWNERS CAPITAL
Managing Owner Units
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units	$ 12,794	$ 1,484,478
Units Outstanding	177	16,296
Net Asset Value per Unit	$ 72.28	$ 91.10
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 1a [Member]
OWNERS CAPITAL
Limited Owner Units
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
ASSETS
Cash and cash equivalents	118,506	$ 37,556
U.S. Treasury securities, at fair value	209,799	123,409
Receivable from futures commission merchants	2,526,242	2,683,299
Open trade equity, at fair value	116,184	220,659
Swap contracts, at fair value	11,944,753	10,794,908
Investments in private investment companies, at fair value	13,809,892	22,854,326
Investments in unconsolidated trading companies, at fair value	50,867	1,744,999
Interest receivable	4,270	2,544
Redemptions receivable from private investment companies	380,111
Total Assets	29,160,624	38,461,700
LIABILITIES
Redemptions payable	39,059	23,759
Management fees payable to Managing Owner	8,795	13,917
Interest payable to Managing Owner	105	1,490
Service fees payable to Managing Owner	42,253	56,791
Trading fees payable to Managing Owner	70,179	101,770
Risk analysis fees payable	8,465	9,127
Advance on unrealized Swap Appreciation	6,176,555	6,176,555
Subscriptions in advance for service fee rebates	319,080	258,194
Other liabilities	2,372
Total Liabilities	6,666,863	6,641,603
OWNERS CAPITAL
Total Owners' Capital	22,493,761	31,820,097
Non-Controlling Interests
Total Capital	22,493,761	31,820,097
Total Liabilities and Owners Capital	29,160,624	38,461,700
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	73,748	125,021
Limited Owner Units	$ 3,288,105	$ 4,403,354
Units Outstanding	18,092	25,027
Net Asset Value per Unit	$ 185.82	$ 180.94
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 2a [Member]
OWNERS CAPITAL
Managing Owner Units	$ 151,133	$ 251,097
Limited Owner Units	$ 44,048	$ 88,076
Units Outstanding	1,212	2,163
Net Asset Value per Unit	$ 161.04	$ 156.81
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 3a [Member]
OWNERS CAPITAL
Limited Owner Units	$ 900,583	$ 893,515
Units Outstanding	5,611	5,718
Net Asset Value per Unit	$ 160.50	$ 156.26
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units	$ 17,797,600	$ 25,703,922
Units Outstanding	158,814	218,514
Net Asset Value per Unit	$ 117.23	$ 117.63
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 1AP [Member]
OWNERS CAPITAL
Limited Owner Units	$ 238,544	$ 355,112
Units Outstanding	1,731	2,647
Net Asset Value per Unit	$ 137.81	$ 134.16
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
ASSETS
Cash and cash equivalents	$ 61,345	$ 25,072
U.S. Treasury securities, at fair value	108,603	82,386
Receivable from futures commission merchants
Open trade equity, at fair value
Swap contracts, at fair value
Investments in private investment companies, at fair value	2,184,240	3,252,075
Investments in unconsolidated trading companies, at fair value	505,355	523,180
Interest receivable	2,268	1,698
Redemptions receivable from private investment companies
Total Assets	2,861,811	3,884,411
LIABILITIES
Redemptions payable	6,875
Management fees payable to Managing Owner
Interest payable to Managing Owner
Service fees payable to Managing Owner	8,387	8,575
Trading fees payable to Managing Owner	6,000	7,812
Risk analysis fees payable
Advance on unrealized Swap Appreciation
Subscriptions in advance for service fee rebates	15,414	11,162
Other liabilities	8,509
Total Liabilities	45,185	27,549
OWNERS CAPITAL
Total Owners' Capital	2,816,626	3,856,862
Non-Controlling Interests
Total Capital	2,816,626	3,856,862
Total Liabilities and Owners Capital	2,861,811	3,884,411
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	29,831	46,368
Limited Owner Units	$ 60,910	$ 99,467
Units Outstanding	873	1,348
Net Asset Value per Unit	$ 103.94	$ 108.18
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units	$ 2,715,051	$ 3,709,130
Units Outstanding	40,793	51,939
Net Asset Value per Unit	$ 66.56	$ 71.41
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 1AP [Member]
OWNERS CAPITAL
Limited Owner Units	$ 10,834	$ 1,897
Units Outstanding	138	23
Net Asset Value per Unit	$ 78.51	$ 82.48
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
ASSETS
U.S. Treasury securities, at fair value	$ 48,741	$ 3,126,551
Incentive fee receivable
Swap contracts, at fair value
Investments in private investment companies, at fair value	5,022,967
Investments in unconsolidated trading companies, at fair value	11,818	4,292,075
Interest receivable	992	64,446
Total Assets	5,112,050	8,434,557
LIABILITIES
Redemptions payable	71,379
Management fees payable to Managing Owner		42,705
Interest payable to Managing Owner	56	8,124
Service fees payable to Managing Owner		17,803
Trading fees payable to Managing Owner	22,540	24,353
Subscriptions in advance for service fee rebates	161,288	133,281
Subscriptions payable to private investment companies
Other liabilities	8,543
Total Liabilities	263,806	226,266
OWNERS CAPITAL
Total Owners' Capital	4,848,244	8,208,291
Total Capital	4,848,244	8,208,291
Total Liabilities and Owners Capital	5,112,050	8,434,557
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	50,058	107,598
Limited Owner Units	$ 293,159	$ 313,167
Units Outstanding	1,780	2,248
Net Asset Value per Unit	$ 192.82	$ 187.17
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units	$ 4,471,980	$ 7,755,444
Units Outstanding	34,003	58,946
Net Asset Value per Unit	$ 131.52	$ 131.57
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1AP [Member]
OWNERS CAPITAL
Limited Owner Units	$ 33,047	$ 32,082
Units Outstanding	214	214
Net Asset Value per Unit	$ 154.43	$ 149.92
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
ASSETS
Cash and cash equivalents	$ 44,011	$ 135,096
U.S. Treasury securities, at fair value	77,916	443,921
Incentive fee receivable		697
Swap contracts, at fair value	2,888,008	2,955,444
Investments in private investment companies, at fair value	2,259,678	2,167,879
Investments in unconsolidated trading companies, at fair value	18,891	726,686
Interest receivable	1,586	9,150
Total Assets	5,290,090	6,438,873
LIABILITIES
Redemptions payable	9,735
Management fees payable to Managing Owner		9,201
Interest payable to Managing Owner	166	1,238
Service fees payable to Managing Owner	6,334	6,684
Trading fees payable to Managing Owner	11,770	10,189
Advance on unrealized Swap Appreciation	1,900,000	1,900,000
Subscriptions in advance for service fee rebates	56,159	46,159
Subscriptions payable to private investment companies
Other liabilities	1,489
Total Liabilities	1,985,053	1,973,471
OWNERS CAPITAL
Total Owners' Capital	2,826,013	3,953,684
Non-Controlling Interests	479,024	511,718
Total Capital	3,305,037	4,465,402
Total Liabilities and Owners Capital	5,290,000	6,438,873
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 2 [Member]
OWNERS CAPITAL
Managing Owner Units	28,593	46,961
Limited Owner Units	$ 493,464	$ 573,992
Units Outstanding	3,399	4,071
Net Asset Value per Unit	$ 153.59	$ 152.53
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 1 [Member]
OWNERS CAPITAL
Limited Owner Units	$ 2,295,623	$ 3,331,725
Units Outstanding	23,536	33,374
Net Asset Value per Unit	$ 97.54	$ 99.83
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 1AP [Member]
OWNERS CAPITAL
Limited Owner Units	$ 8,333	$ 1,006
Units Outstanding	73	9
Net Asset Value per Unit	$ 114.15	$ 111.78

Condensed Schedule of Investmen

Condensed Schedule of Investments - USD ($)		Dec. 31, 2019		Dec. 31, 2018
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 6,384,583		$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[1]	53.21%		36.64%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Frontier XXXV Diversified Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 6,384,583		$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[1]	53.21%		36.64%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Swap [Member] | Frontier XXXVII L/S Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 9,305,733		$ 11,084,463
Investment Owned, % of Total Capital (Net Asset Value)	[2]	77.54%		68.60%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 494,968		$ 855,522
Investment Owned, % of Total Capital (Net Asset Value)	[2]	4.12%		5.30%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,267,090		$ 1,150,943
Investment Owned, % of Total Capital (Net Asset Value)	[2]	10.56%		7.12%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]	$ 2,031,482		$ 1,789,814
Investment Owned, % of Total Capital (Net Asset Value)	[2]	16.93%		11.08%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,460,173		$ 1,517,376
Investment Owned, % of Total Capital (Net Asset Value)	[2]	12.17%		9.39%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]	$ 499,551		$ 446,649
Investment Owned, % of Total Capital (Net Asset Value)	[2]	4.16%		2.76%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,827,263		$ 300,708
Investment Owned, % of Total Capital (Net Asset Value)	[2]	15.23%		1.86%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,549,720		$ 3,266,499
Investment Owned, % of Total Capital (Net Asset Value)	[2]	12.91%		20.22%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%		0.00%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]	$ 175,486		$ 106,426
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.46%		0.66%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value				$ 1,650,526
Investment Owned, % of Total Capital (Net Asset Value)				10.22%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 24,150		$ 1,160,910
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.20%		7.19%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 24,150		$ 216,107
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.20%		1.34%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]			$ 944,803
Investment Owned, % of Total Capital (Net Asset Value)	[2]			5.85%
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 99,605	[3]	$ 1,553,261	[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.83%	[4]	9.61%	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 99,605	[3]	$ 1,553,261	[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.83%	[3]	9.61%	[2]
Investment Owned, Underlying Face Amount, at Face Value		$ 510,000	[3]	$ 4,512,000	[2]
Investment Owned, at Cost		652,026	[3]	5,589,456	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		78,065	[3]	1,232,919	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		99,804	[3]	1,527,337	[2]
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		78,065	[3]	1,232,919
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		99,804	[3]	1,527,337	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member] | Frontier XXXV Diversified Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Swap [Member] | Frontier XXXVII L/S Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 2,198,997		$ 4,661,327
Investment Owned, % of Total Capital (Net Asset Value)	[2]	98.26%		83.65%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 210,013		$ 695,585
Investment Owned, % of Total Capital (Net Asset Value)	[2]	9.38%		12.48%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,049,575
Investment Owned, % of Total Capital (Net Asset Value)	[2]	46.90%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 466,988		$ 2,667,361
Investment Owned, % of Total Capital (Net Asset Value)	[2]	20.87%		47.87%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]	$ 472,421		$ 1,298,381
Investment Owned, % of Total Capital (Net Asset Value)	[2]	21.11%		23.30%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 11,005		$ 775,088
Investment Owned, % of Total Capital (Net Asset Value)	[2]	49.00%		13.91%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 11,005		$ 21,201
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.49%		0.38%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]			$ 753,887
Investment Owned, % of Total Capital (Net Asset Value)	[2]			13.53%
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 45,391	[3]	$ 152,384	[2]
Investment Owned, % of Total Capital (Net Asset Value)		2.03%	[3]	2.73%	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 45,391	[3]	$ 152,384	[2]
Investment Owned, % of Total Capital (Net Asset Value)		2.03%	[3]	2.73%	[2]
Investment Owned, Underlying Face Amount, at Face Value		$ 510,000	[3]	$ 4,512,000	[2]
Investment Owned, at Cost		652,026	[3]	5,589,456	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		35,575	[3]	120,957	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		45,482	[3]	149,841	[2]
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		35,575	[3]	120,957
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		45,482	[3]	149,841	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 362,521		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[1]	27.17%		19.59%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member] | Frontier XXXV Diversified Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member] | Frontier XXXVII L/S Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 362,521		$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[1]	27.17%		19.59%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 986,757		$ 1,729,241
Investment Owned, % of Total Capital (Net Asset Value)	[2]	73.95%		70.72%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value	[2]	$ 111,013		$ 230,848
Investment Owned, % of Total Capital (Net Asset Value)	[2]	8.32%		9.44%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.00%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 343,834		$ 887,952
Investment Owned, % of Total Capital (Net Asset Value)	[2]	25.77%		36.31%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value	[2]	$ 531,910		$ 610,441
Investment Owned, % of Total Capital (Net Asset Value)	[2]	39.86%		24.96%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 14,711		$ 28,163
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.10%		1.15%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 14,711		$ 28,163
Investment Owned, % of Total Capital (Net Asset Value)	[2]	1.10%		1.15%
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 60,673	[3]	$ 202,415	[2]
Investment Owned, % of Total Capital (Net Asset Value)		4.55%	[3]	8.28%	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 60,673	[3]	$ 202,415	[2]
Investment Owned, % of Total Capital (Net Asset Value)		4.55%	[3]	8.28%	[2]
Investment Owned, Underlying Face Amount, at Face Value		$ 510,000	[3]	$ 4,512,000	[2]
Investment Owned, at Cost		652,026	[3]	5,589,456	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		47,552	[3]	160,669	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		60,794	[3]	199,037	[2]
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		47,552	[3]	160,669
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		60,794	[3]	199,037	[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Investment Owned, Fair Value		$ 11,944,753	[1]	$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)		53.10%	[1]	33.92%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Swap [Member] | Frontier XXXIV Balanced Select Swap (U.S.) [Member]
Investment Owned, Fair Value		$ 11,944,753	[1]	$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)		53.10%	[1]	33.92%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value		$ 13,809,892	[2]	$ 22,854,326
Investment Owned, % of Total Capital (Net Asset Value)		61.39%	[2]	71.81%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 668,428	[2]	$ 1,526,456
Investment Owned, % of Total Capital (Net Asset Value)		2.97%	[2]	4.80%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		$ 1,913,873	[2]	$ 1,852,304
Investment Owned, % of Total Capital (Net Asset Value)		8.51%	[2]	5.82%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		$ 2,589,148	[2]	$ 3,191,189
Investment Owned, % of Total Capital (Net Asset Value)		11.51%	[2]	10.03%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value		$ 2,556,118	[2]	$ 3,451,307
Investment Owned, % of Total Capital (Net Asset Value)		11.36%	[2]	10.85%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		$ 533,194	[2]	$ 484,157
Investment Owned, % of Total Capital (Net Asset Value)		2.37%	[2]	1.52%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		$ 2,679,197	[2]	$ 802,570
Investment Owned, % of Total Capital (Net Asset Value)		11.91%	[2]	2.52%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 2,583,294	[2]	$ 7,426,768
Investment Owned, % of Total Capital (Net Asset Value)		11.48%	[2]	23.34%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		$ 286,640	[2]	$ 266,280
Investment Owned, % of Total Capital (Net Asset Value)		1.27%	[2]	0.84%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value				$ 3,853,295
Investment Owned, % of Total Capital (Net Asset Value)				12.11%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 50,867	[2]	$ 1,744,999
Investment Owned, % of Total Capital (Net Asset Value)		0.23%	[2]	5.49%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 50,867	[2]	$ 34,422
Investment Owned, % of Total Capital (Net Asset Value)		0.23%	[2]	0.11%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)			[2]
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value				$ 1,710,577
Investment Owned, % of Total Capital (Net Asset Value)				5.38%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 209,799	[3]	$ 123,409
Investment Owned, % of Total Capital (Net Asset Value)		0.93%	[3]	0.39%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 209,799	[3]	$ 123,409
Investment Owned, % of Total Capital (Net Asset Value)		0.93%	[3]	0.39%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 510,000
Investment Owned, at Cost	[3]	652,026
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	164,427
Investment Owned, Underlying Face Amount, at Face Value				$ 97,958
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	210,217
Investment Owned, at Cost				121,350
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		$ 54,119	[4]	$ 158,944
Investment Owned, % of Total Capital (Net Asset Value)		25.00%	[4]	0.51%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 22,437	[4]	$ 8,490
Investment Owned, % of Total Capital (Net Asset Value)		0.10%	[4]	0.03%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various base metals futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (3,344)	[5]	$ (31,117)
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)	[5]	(0.10%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (735)	[5]	$ (5,390)
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[5]	(0.02%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value		$ (2,763)	[4]	$ 116,653
Investment Owned, % of Total Capital (Net Asset Value)		0.01%	[4]	0.37%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]	$ 45,590
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.20%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (Far East) [Member]
Investment Owned, Fair Value	[4]	$ 709
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 1,740	[4]	$ (2,025)
Investment Owned, % of Total Capital (Net Asset Value)		0.01%	[4]	(0.01%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[5]	$ (2,506)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.01%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]	$ (7,157)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(3.00%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]	$ (21,237)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.09%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ 21,385
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.10%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value				$ (1,472)
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Canada) [Member]
Investment Owned, Fair Value				$ 7,402
Investment Owned, % of Total Capital (Net Asset Value)				0.02%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Investment Owned, Fair Value				$ 17,226
Investment Owned, % of Total Capital (Net Asset Value)				0.05%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value				$ 48,083
Investment Owned, % of Total Capital (Net Asset Value)				0.15%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value				$ 1,094
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value		$ 2,938	[4]	$ 83,916
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.25%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (6,369)	[4]	$ 28,880
Investment Owned, % of Total Capital (Net Asset Value)		(0.03%)	[4]	0.09%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]	$ 9,573
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.04%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value				$ (1,305)
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value		$ (3,340)	[4]	$ 25,227
Investment Owned, % of Total Capital (Net Asset Value)		(0.01%)	[4]	0.08%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value				$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)				0.04%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[4]	$ (1,410)
Investment Owned, % of Total Capital (Net Asset Value)	[4]	(0.01%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]	$ 1,104
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 3,380	[5]	$ (600)
Investment Owned, % of Total Capital (Net Asset Value)		0.02%	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	[5]	$ 1,104
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Canada) [Member]
Investment Owned, Fair Value				$ 9,613
Investment Owned, % of Total Capital (Net Asset Value)				0.03%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value				$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)				0.01%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value				$ 6,120
Investment Owned, % of Total Capital (Net Asset Value)				0.02%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value		$ 128
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value		$ 59,127	[4]	$ (22,201)
Investment Owned, % of Total Capital (Net Asset Value)		0.26%	[4]	(0.07%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | CURRENCY FORWARDS [Member] | Various Currency Forwards Contracts (NA) [Member]
Investment Owned, Fair Value		$ 59,127	[4]	$ (22,201)
Investment Owned, % of Total Capital (Net Asset Value)		0.26%	[4]	(0.07%)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value		$ 116,184	[4]	$ 220,659
Investment Owned, % of Total Capital (Net Asset Value)		0.52%	[4]	0.69%
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	$ 164,427
Investment Owned, Underlying Face Amount, at Face Value				$ 97,958
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	210,217
Investment Owned, at Cost				121,350
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Swap [Member] | Frontier XXXIV Balanced Select Swap (U.S.) [Member]
Investment Owned, Fair Value			[1]
Investment Owned, % of Total Capital (Net Asset Value)			[1]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value		$ 2,184,240	[2]	$ 3,252,075
Investment Owned, % of Total Capital (Net Asset Value)		77.55%	[2]	84.32%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 835,386	[2]	$ 1,954,531
Investment Owned, % of Total Capital (Net Asset Value)		29.66%	[2]	50.68%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		$ 1,348,854	[2]	$ 1,297,544
Investment Owned, % of Total Capital (Net Asset Value)		47.89%	[2]	33.64%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value			[2]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[2]
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 505,355	[2]	$ 523,180
Investment Owned, % of Total Capital (Net Asset Value)		17.94%	[2]	13.57%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value		$ 26,331	[2]	$ 11,463
Investment Owned, % of Total Capital (Net Asset Value)		0.93%	[2]	0.30%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXIX, LLC [Member]
Investment Owned, Fair Value		$ 479,024	[2]	$ 511,717
Investment Owned, % of Total Capital (Net Asset Value)		17.01%	[2]	13.27%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value		$ 108,603	[3]	$ 82,386
Investment Owned, % of Total Capital (Net Asset Value)		3.86%	[3]	2.14%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value		$ 108,603	[3]	$ 82,386
Investment Owned, % of Total Capital (Net Asset Value)		3.86%	[3]	2.14%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 510,000
Investment Owned, at Cost	[3]	652,026
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	85,116
Investment Owned, Underlying Face Amount, at Face Value				$ 65,395
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	108,820
Investment Owned, at Cost				81,011
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value			[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various soft futures contracts (Far East) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Canada) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Far East) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[4]
Investment Owned, % of Total Capital (Net Asset Value)	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value			[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various interest rates futures contracts (Far East) [Member]
Investment Owned, Fair Value	[5]
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Africa) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)		0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Canada) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various agriculture futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (U.S.) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | CURRENCY FORWARDS [Member] | Various Currency Forwards Contracts (NA) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value			[4]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%	[4]	0.00%
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	$ 85,116
Investment Owned, Underlying Face Amount, at Face Value				$ 65,395
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	108,820
Investment Owned, at Cost				81,011
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Swap [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Swap [Member] | Frontier Brevan Howard Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 5,022,967
Investment Owned, % of Total Capital (Net Asset Value)	[2]	103.60%
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 5,022,967
Investment Owned, % of Total Capital (Net Asset Value)	[2]	103.60%
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value	[2]	$ 11,818
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.24%
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 11,818
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.24%
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 48,741
Investment Owned, % of Total Capital (Net Asset Value)	[3]	1.01%
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 48,741
Investment Owned, % of Total Capital (Net Asset Value)	[3]	1.01%
Investment Owned, Underlying Face Amount, at Face Value	[3]	$ 510,000
Investment Owned, at Cost	[3]	652,026
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	38,200
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	48,838
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	38,200
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	48,838
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | US Treasury Note [Member]
Investment Owned, Underlying Face Amount, at Face Value				352,367
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | US Treasury Note [Member]
Investment Owned, at Cost				436,512
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]	$ 2,888,008		$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[1]	0.18%		66.19%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Swap [Member] | Frontier Brevan Howard Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]	$ 2,888,008		$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[1]	18.14%		66.19%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]	$ 2,259,678		$ 2,167,879
Investment Owned, % of Total Capital (Net Asset Value)	[2]	68.37%		48.55%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value	[2]	$ 1,473,432
Investment Owned, % of Total Capital (Net Asset Value)	[2]	44.58%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]	$ 786,246		$ 2,167,879
Investment Owned, % of Total Capital (Net Asset Value)	[2]	23.79%		48.55%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value		$ 18,891	[2]	$ 726,686
Investment Owned, % of Total Capital (Net Asset Value)		0.57%	[2]	16.27%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value	[2]	$ 18,891
Investment Owned, % of Total Capital (Net Asset Value)	[2]	0.57%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value				$ 664,923
Investment Owned, % of Total Capital (Net Asset Value)				14.89%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value				$ 61,763
Investment Owned, % of Total Capital (Net Asset Value)				1.38%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]	$ 77,916		$ 443,921
Investment Owned, % of Total Capital (Net Asset Value)	[3]	2.36%		9.94%
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	$ 77,916		$ 443,921
Investment Owned, % of Total Capital (Net Asset Value)	[3]	2.36%		9.94%
Investment Owned, Underlying Face Amount, at Face Value		$ 510,000	[3]	$ 4,512,000
Investment Owned, at Cost		652,026	[3]	5,589,456
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Underlying Face Amount, at Face Value	[3]			352,367
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, at Cost	[3]			436,512
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	61,065
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]	78,071
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	61,065
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | U.S. Treasury Securities One [Member]
Investment Owned, Fair Value	[3]	78,071
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value
Investment Owned, % of Total Capital (Net Asset Value)				0.00%
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Swap [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Swap [Member] | Frontier Brevan Howard Swap (U.S.) [Member]
Investment Owned, Fair Value	[1]
Investment Owned, % of Total Capital (Net Asset Value)	[1]
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | US Treasury Note [Member]
Investment Owned, Underlying Face Amount, at Face Value				$ 2,481,736
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | US Treasury Note [Member]
Investment Owned, at Cost				3,074,369
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value	[2]
Investment Owned, % of Total Capital (Net Asset Value)	[2]
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Investment in Unconsolidated Trading Companies [Member]
Investment Owned, Fair Value				$ 4,292,075
Investment Owned, % of Total Capital (Net Asset Value)				52.29%
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company II, LLC [Member]
Investment Owned, Fair Value				$ 3,857,075
Investment Owned, % of Total Capital (Net Asset Value)				46.99%
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Investment in Unconsolidated Trading Companies [Member] | Frontier Trading Company XXXVIII, LLC [Member]
Investment Owned, Fair Value				$ 435,000
Investment Owned, % of Total Capital (Net Asset Value)				5.30%
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value	[3]			$ 3,126,551
Investment Owned, % of Total Capital (Net Asset Value)	[3]			38.09%
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value	[3]			$ 3,126,551
Investment Owned, % of Total Capital (Net Asset Value)	[3]			38.09%
Investment Owned, Underlying Face Amount, at Face Value				$ 4,512,000
Investment Owned, at Cost				5,589,456
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Underlying Face Amount, at Face Value	[3]			2,481,736
The Series of the Frontier Funds [Member] | Frontier Winton Fund [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, at Cost	[3]			3,074,369
Frontier Funds [Member] | Open Trade Equity (Deficit) [Member]
Investment Owned, Fair Value	[5]	$ 116,184		$ (398,189)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	0.52%		(0.56%)
Frontier Funds [Member] | Swap [Member]
Investment Owned, Fair Value	[6]			$ 20,149,868
Investment Owned, % of Total Capital (Net Asset Value)	[6]			27.98%
Frontier Funds [Member] | Swap [Member] | Frontier XXXV Diversified Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[6]			$ 5,920,414
Investment Owned, % of Total Capital (Net Asset Value)	[6]			8.22%
Frontier Funds [Member] | Swap [Member] | Frontier XXXVII L/S Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[6]			$ 479,102
Investment Owned, % of Total Capital (Net Asset Value)	[6]			0.67%
Frontier Funds [Member] | Swap [Member] | Frontier XXXIV Balanced Select Swap (U.S.) [Member]
Investment Owned, Fair Value	[6]			$ 10,794,908
Investment Owned, % of Total Capital (Net Asset Value)	[6]			14.99%
Frontier Funds [Member] | Swap [Member] | Frontier Brevan Howard Swap (U.S.) [Member]
Investment Owned, Fair Value	[6]			$ 2,955,444
Investment Owned, % of Total Capital (Net Asset Value)	[6]			4.10%
Frontier Funds [Member] | Private Investment Companies [Member]
Investment Owned, Fair Value		$ 35,926,037	[2]	$ 46,557,428	[7]
Investment Owned, % of Total Capital (Net Asset Value)		73.99%	[2]	64.64%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Investment Owned, Fair Value		$ 1,484,422	[2]	$ 3,308,411	[7]
Investment Owned, % of Total Capital (Net Asset Value)		3.06%	[2]	4.59%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Investment Owned, Fair Value		$ 3,180,963	[2]	$ 3,003,247	[7]
Investment Owned, % of Total Capital (Net Asset Value)		6.55%	[2]	4.17%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Investment Owned, Fair Value		$ 4,620,630	[2]	$ 4,981,003	[7]
Investment Owned, % of Total Capital (Net Asset Value)		9.52%	[2]	6.92%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Investment Owned, Fair Value	[7]			$ 4,968,683
Investment Owned, % of Total Capital (Net Asset Value)	[7]			6.90%
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Investment Owned, Fair Value		$ 1,032,745	[2]	$ 930,806	[7]
Investment Owned, % of Total Capital (Net Asset Value)		2.13%	[2]	1.29%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Investment Owned, Fair Value		$ 12,052,434	[2]	$ 1,103,278	[7]
Investment Owned, % of Total Capital (Net Asset Value)		24.82%	[2]	1.53%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Investment Owned, Fair Value		$ 6,565,468	[2]	$ 18,370,991	[7]
Investment Owned, % of Total Capital (Net Asset Value)		13.52%	[2]	25.51%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Investment Owned, Fair Value		$ 1,821,275	[2]	$ 2,595,925	[7]
Investment Owned, % of Total Capital (Net Asset Value)		3.75%	[2]	3.60%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Investment Owned, Fair Value		$ 994,036	[2]	$ 983,147	[7]
Investment Owned, % of Total Capital (Net Asset Value)		2.05%	[2]	1.37%	[7]
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Investment Owned, Fair Value	[7]			$ 5,503,821
Investment Owned, % of Total Capital (Net Asset Value)	[7]			7.64%
Frontier Funds [Member] | Private Investment Companies [Member] | Galaxy Plus Fund - Quest Fit Feeder Fund (535) LLC [Member]
Investment Owned, Fair Value		$ 157,773	[2]	$ 808,116	[7]
Investment Owned, % of Total Capital (Net Asset Value)		0.32%	[2]	1.12%	[7]
Frontier Funds [Member] | Additional Disclosure on U.S. Treasury Securities [Member]
Investment Owned, Fair Value				$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)				7.89%
Frontier Funds [Member] | Additional Disclosure on U.S. Treasury Securities [Member] | US Treasury Note [Member]
Investment Owned, Fair Value				$ 5,684,327
Investment Owned, % of Total Capital (Net Asset Value)				7.89%
Investment Owned, Underlying Face Amount, at Face Value				$ 4,512,000
Investment Owned, at Cost				5,589,456
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[5]			$ 611,366
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.85%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 9,510
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.01%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]	$ (3,344)		$ (429,385)
Investment Owned, % of Total Capital (Net Asset Value)	[5]	(0.01%)		(0.60%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ 360,817
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.50%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 14,730
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.02%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (20,705)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.03%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (18,456)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.03%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various stock index futures contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ 1,338
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value		$ 1,472		$ (1,315)	[5]
Investment Owned, % of Total Capital (Net Asset Value)		0.00%		0.00%	[5]
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (643,321)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.89%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (75,392)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.10%)
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Latin America) [Member]
Investment Owned, Fair Value	[5]			$ 42,160
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.06%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ 78,270
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.11%
Frontier Funds [Member] | LONG FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 44,250
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.06%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member]
Investment Owned, Fair Value	[5]			$ 210,570
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.29%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 81,243
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.11%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Base Metals Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 147,521
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.20%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (79,801)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.11%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various precious metal futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (226,300)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.31%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Soft Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 22,291
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.03%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various stock index futures contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ 12,826
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.02%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]			$ 283
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ 400
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various energy futures contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 425,052
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.59%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Africa) [Member]
Investment Owned, Fair Value	[5]			$ (1,220)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ 62,711
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.09%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ (309)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Interest Rates Futures Contracts (U.S.) [Member]
Investment Owned, Fair Value	[5]			$ (35,688)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.05%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Agriculture Futures Contracts (Canada) [Member]
Investment Owned, Fair Value	[5]			$ 9,817
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.01%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Europe) [Member]
Investment Owned, Fair Value	[5]			$ (63,875)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.09%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Far East) [Member]
Investment Owned, Fair Value	[5]			$ (180,813)
Investment Owned, % of Total Capital (Net Asset Value)	[5]			(0.25%)
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Currency Futures Contracts (Oceanic) [Member]
Investment Owned, Fair Value	[5]			$ 33,405
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.05%
Frontier Funds [Member] | SHORT FUTURES CONTRACTS [Member] | Various Stock Index Futures Contracts (Canada) [Member]
Investment Owned, Fair Value	[5]			$ 3,027
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | CURRENCY FORWARDS [Member]
Investment Owned, Fair Value	[5]			$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
Frontier Funds [Member] | CURRENCY FORWARDS [Member] | Various Currency Forwards Contracts (NA) [Member]
Investment Owned, Fair Value	[5]			$ 2,607
Investment Owned, % of Total Capital (Net Asset Value)	[5]			0.00%
[1]	See Note 4 to the Financial Statements.
[2]	See Note 5 to the Financial Statements.
[3]	See Note 2 to the Financial Statements.
[4]	Except for those items disclosed, no individual futures, or forwards position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.
[5]	Except for those items disclosed, no individual futures, forwards and option on futures contract position constituted greater than 1 percent of Net Asset Value. Accordingly, the number of contracts and expiration dates are not presented.
[6]	See Notes to Consolidated Financial Statements, Note 4.
[7]	See Notes to Consolidated Financial Statements, Note 5.

Statements of Operations

Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Realized and unrealized gain/(loss) on investments:
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (1,104,086)	$ (15,213,772)	$ 2,142,338
Frontier Funds [Member]
Investment income:
Interest - net	98,785	223,482	255,478
Total Income	98,785	223,482	255,478
Expenses:
Incentive Fees (rebate)		137,543	(147,256)
Management Fees	78,678	838,497	1,516,571
Service Fees	9,853	85,830	142,535
Risk analysis Fees	1,028,325	1,604,307	2,513,028
Trading Fees	2,216,815	3,040,016	5,247,342
Other Fees		125,642
Total Expenses	3,380,487	5,831,835	9,272,220
Investment income/(loss) - net	(3,281,703)	(5,608,353)	(9,016,742)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	(1,221,223)	681,508	3,803,691
Net unrealized gain/(loss) on private investment companies	3,941,383	(10,259,391)	90,112
Net realized gain/(loss) on private investment companies	(2,575,249)	544,849	7,844,635
Net change in open trade equity/(deficit)	568,782	(2,144,664)	(281,062)
Net unrealized gain/(loss) on swap contracts	1,429,999	2,041,028	(402,290)
Net realized gain/(loss) on U.S. Treasury securities	59,992	(556,676)	686,550
Net unrealized gain/(loss) on U.S. Treasury securities	(39,696)	191,566	(184,479)
Trading commissions	(37,464)	(103,639)	(398,077)
Net gain/(loss) on investments	2,126,524	(9,605,419)	11,159,080
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(1,104,086)	(15,213,772)	2,142,338
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Investment income:
Interest - net	19,354	35,454	97,701
Total Income	19,354	35,454	97,701
Expenses:
Incentive Fees (rebate)		4,499	50,661
Management Fees	2,668	44,289	69,478
Service Fees	44,726	58,473	132,465
Trading Fees	493,585	591,665	1,347,386
Other Fees		16,404
Total Expenses	540,979	706,332	1,498,668
Investment income/(loss) - net	(521,625)	(670,878)	(1,400,967)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	907,504	(2,307,071)	812,254
Net realized gain/(loss) on private investment companies	(730,551)	278,882	1,870,541
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts	464,169	643,941	(47,375)
Net realized gain/(loss) on U.S. Treasury securities	14,359	(51,245)	65,391
Net unrealized gain/(loss) on U.S. Treasury securities	(19,045)	33,137	152,150
Trading commissions
Change in fair value of investments in unconsolidated trading companies	(84,431)	(126,992)	160,009
Net gain/(loss) on investments	552,005	(1,529,348)	3,012,970
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	30,380	(2,200,226)	1,612,003
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 30,380	$ (2,200,226)	$ 1,612,003
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (1.15)	$ (14.16)	$ (0.02)
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	0.74	(14.35)	2.25
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	0.98	(13.06)	2.41
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member] | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
Investment income:
Interest - net	$ 4,656	$ 23,657	$ 79,881
Total Income	4,656	23,657	79,881
Expenses:
Incentive Fees (rebate)
Management Fees	7,665	108,413	184,365
Service Fees	11,635	49,049	89,344
Trading Fees	213,153	420,391	672,227
Other Fees		27,336
Total Expenses	232,453	605,189	945,936
Investment income/(loss) - net	(227,797)	(581,532)	(866,055)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	(162,637)	(1,197,207)	794,590
Net realized gain/(loss) on private investment companies	(159,651)	(75,683)	482,146
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	15,346	(45,198)	88,761
Net unrealized gain/(loss) on U.S. Treasury securities	(9,501)	(15,571)	(70,651)
Trading commissions
Change in fair value of investments in unconsolidated trading companies	(62,584)	(179,768)	(217,851)
Net gain/(loss) on investments	(383,472)	(1,513,427)	1,076,995
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(611,269)	(2,094,959)	210,940
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (611,269)	$ (2,094,959)	$ 210,940
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (18.82)	$ (23.64)	$ 1.94
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(20.49)	(25.59)	4.49
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(18.98)	(23.63)	4.51
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member] | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Investment income:
Interest - net	$ 2,018	$ 12,648
Total Income	2,018	12,648
Expenses:
Incentive Fees (rebate)		3,789	144,752
Management Fees
Service Fees	562	1,653	13,672
Trading Fees	54,334	82,890	234,923
Other Fees		1,594
Total Expenses	54,896	82,348	191,513
Investment income/(loss) - net	(52,878)	(69,700)	(191,513)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	198,426	(403,889)	(246,722)
Net realized gain/(loss) on private investment companies	(428,509)	(240,941)	(106,289)
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts	(116,581)	82,063	26,621
Net realized gain/(loss) on U.S. Treasury securities	977	(40,742)	21,587
Net unrealized gain/(loss) on U.S. Treasury securities	2,447	14,319	(10,631)
Trading commissions
Change in fair value of investments in unconsolidated trading companies	35	(18,068)	83,337
Net gain/(loss) on investments	(343,205)	(607,258)	(232,097)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(396,083)	(676,958)	(423,610)
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (396,083)	$ (676,958)	$ (423,610)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(12.6)	(24.55)	(11.43)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(17.22)	(16.99)	(13.75)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(13.97)	(27.07)	(12.08)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(18.02)	(17.84)	(9.3)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (14.51)	$ (28.16)	$ (9.51)
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Investment income:
Interest - net	$ 46,019	$ 38,298	$ 22,063
Total Income	46,019	38,298	22,063
Expenses:
Incentive Fees (rebate)		145,134	40,189
Management Fees	22,377	77,495	107,368
Service Fees	606,359	920,570	1,409,337
Risk analysis Fees	5,576	8,738	10,265
Trading Fees	972,678	1,378,226	2,058,870
Other Fees		29,045
Total Expenses	1,606,990	2,559,208	3,626,029
Investment income/(loss) - net	(1,560,971)	(2,520,910)	(3,603,966)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options	135,527	(376,937)	(381,817)
Net unrealized gain/(loss) on private investment companies	1,457,717	(4,729,444)	270,252
Net realized gain/(loss) on private investment companies	(921,909)	774,004	4,398,507
Net change in open trade equity/(deficit)	(133,881)	14,335	(56,728)
Net unrealized gain/(loss) on swap contracts	1,149,846	1,453,948	(84,491)
Net realized gain/(loss) on U.S. Treasury securities	12,809	(57,886)	76,560
Net unrealized gain/(loss) on U.S. Treasury securities	1,058	(13,623)	149,968
Trading commissions	(33,456)	(61,387)	(68,711)
Change in fair value of investments in unconsolidated trading companies	(140,530)	(286,285)	601,398
Net gain/(loss) on investments	1,527,182	(3,283,275)	4,904,938
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(33,789)	(5,804,185)	1,300,972
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (33,789)	$ (5,804,185)	$ 1,300,972
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (0.4)	$ (18.33)	$ 1.17
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	4.88	(21.96)	7.91
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	4.24	(18.92)	6.69
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	3.65	(16.4)	5.59
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member] | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 4.23	$ (18.96)	$ 6.72
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
Investment income:
Interest - net	$ (5)
Total Income	(5)
Expenses:
Incentive Fees (rebate)
Management Fees			84,734
Service Fees	102,692	132,408	220,938
Risk analysis Fees			9,681
Trading Fees	85,589	117,056	176,459
Other Fees		5,384
Total Expenses	188,281	254,848	491,812
Investment income/(loss) - net	(188,286)	(254,848)	(491,812)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options			(148,184)
Net unrealized gain/(loss) on private investment companies	(149,095)	(919,512)	456,301
Net realized gain/(loss) on private investment companies	170,272	(26,405)	(41,515)
Net change in open trade equity/(deficit)			(642,494)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	(397)	(13,509)	31,037
Net unrealized gain/(loss) on U.S. Treasury securities	3,636	(14,160)	(6,069)
Trading commissions			(42,000)
Change in fair value of investments in unconsolidated trading companies	(31,555)	(75,342)	(294,076)
Net gain/(loss) on investments	(7,139)	(1,048,928)	(687,000)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(195,425)	(1,303,776)	(1,178,812)
Less: Operations attributable to non-controlling interests			(469,078)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (195,425)	$ (1,303,776)	$ (709,734)
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (4.86)	$ (18.86)	$ (3.79)
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	(4.24)	(24.55)	(1.52)
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 2a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 3a [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member] | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (3.97)	$ (17.54)	$ (1.14)
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Investment income:
Interest - net	$ (2)
Total Income	(2)
Expenses:
Incentive Fees (rebate)
Management Fees	38,679
Service Fees	177,833
Risk analysis Fees
Trading Fees	278,497
Other Fees
Total Expenses	495,009
Investment income/(loss) - net	(495,011)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	1,144,681
Net realized gain/(loss) on private investment companies	(168,651)
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities	13,736
Net unrealized gain/(loss) on U.S. Treasury securities	(19,535)
Trading commissions
Change in fair value of investments in unconsolidated trading companies	(353,149)
Net gain/(loss) on investments	617,083
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	122,072
Less: Operations attributable to non-controlling interests
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ 122,072
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Investment income:
Interest - net		$ 316	$ 55,833
Total Income		316	55,833
Expenses:
Incentive Fees (rebate)			(75,099)
Management Fees		487,698	877,626
Service Fees		318,897	465,225
Risk analysis Fees			117,961
Trading Fees		307,053	565,481
Other Fees		29,844
Total Expenses		1,143,492	1,951,194
Investment income/(loss) - net		(1,143,176)	(1,895,361)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options			4,430,276
Net unrealized gain/(loss) on private investment companies			(922,290)
Net realized gain/(loss) on private investment companies
Net change in open trade equity/(deficit)
Net unrealized gain/(loss) on swap contracts
Net realized gain/(loss) on U.S. Treasury securities		(301,015)	351,189
Net unrealized gain/(loss) on U.S. Treasury securities		168,599	(410,408)
Trading commissions			(72,185)
Change in fair value of investments in unconsolidated trading companies		(876,164)	350,346
Net gain/(loss) on investments		(1,008,580)	3,726,928
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS		(2,151,756)	1,831,567
Less: Operations attributable to non-controlling interests			1,570,365
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS		$ (2,151,756)	$ 261,202
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (0.05)	$ (27.51)	$ 4.56
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	5.65	(29.33)	5.52
The Series of the Frontier Funds [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 4.51	$ (26.52)	$ 10.27
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Investment income:
Interest - net	$ (6)		$ 1,430
Total Income	(6)		1,430
Expenses:
Incentive Fees (rebate)		(697)	4,603
Management Fees	7,289	120,602	193,000
Service Fees	84,518	123,257	182,048
Risk analysis Fees
Trading Fees	118,979	142,735	191,996
Other Fees		16,035
Total Expenses	210,786	403,326	562,441
Investment income/(loss) - net	(210,792)	(403,326)	(562,441)
Realized and unrealized gain/(loss) on investments:
Net realized gain/(loss) on futures, forwards and options
Net unrealized gain/(loss) on private investment companies	430,724	(306,862)
Net realized gain/(loss) on private investment companies	(146,186)	(125,458)	206,064
Net change in open trade equity/(deficit)			2,795
Net unrealized gain/(loss) on swap contracts	(67,435)	(138,924)	(297,047)
Net realized gain/(loss) on U.S. Treasury securities	3,162	(47,081)	52,025
Net unrealized gain/(loss) on U.S. Treasury securities	1,244	18,865	11,162
Trading commissions
Change in fair value of investments in unconsolidated trading companies	(63,386)	(101,748)	333,988
Net gain/(loss) on investments	158,123	(701,208)	308,987
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS	(52,669)	(1,104,534)	(253,454)
Less: Operations attributable to non-controlling interests	(32,695)	(67,355)	(144,019)
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS	$ (19,974)	$ (1,037,179)	$ (109,435)
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 1 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ (2.29)	$ (21.36)	$ 1.61
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 2 [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	1.06	(27.17)	7.6
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member] | Class 1AP [Member]
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT
NET INCREASE/(DECREASE) IN CAPITAL RESULTING FROM OPERATIONS ATTRIBUTABLE TO CONTROLLING INTERESTS PER UNIT	$ 2.37	$ (22.5)	$ 5.68

Consolidated Statements of Chan

Consolidated Statements of Changes in Owners' Capital Equity - USD ($)	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Diversified Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Diversified Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Diversified Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Masters Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Masters Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Masters Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 1a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Long/Short Commodity Fund [Member]Class 3a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 3a [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Balanced Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Select Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Select Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Select Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Global Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Global Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Global Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Heritage Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Heritage Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Limited Owners [Member]Frontier Heritage Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Diversified Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Diversified Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Masters Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Masters Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Long/Short Commodity Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Long/Short Commodity Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Long/Short Commodity Fund [Member]Class 3a [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Balanced Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Balanced Fund [Member]Class 2a [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Select Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Global Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Managing Owner [Member]Frontier Heritage Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Diversified Fund [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Masters Fund [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Long/Short Commodity Fund [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Balanced Fund [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Select Fund [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Global Fund [Member]	The Series of the Frontier Funds [Member]Non-Controlling Interests [Member]Frontier Heritage Fund [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Frontier Diversified Fund [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Frontier Masters Fund [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]Class 3 [Member]	The Series of the Frontier Funds [Member]Frontier Long/Short Commodity Fund [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Balanced Fund [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Select Fund [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Global Fund [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]Class 1 [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]Class 2 [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]Class 1AP [Member]	The Series of the Frontier Funds [Member]Frontier Heritage Fund [Member]	Frontier Funds [Member]Limited Owners [Member]	Frontier Funds [Member]Managing Owner [Member]	Frontier Funds [Member]	Total
Owners' Capital, Beginning balance at Dec. 31, 2016	$ 5,189,420	$ 37,771,385	$ 13,016,491	$ 5,361,626	$ 5,320,871	$ 6,117,149	$ 508,474	$ 4,405,863	$ 1,913,595	$ 728,453	$ 1,162,796	$ 56,955,371	$ 21,871,170	$ 307,144	$ 1,749,006	$ 677,181	$ 10,540,702	$ 1,402,043	$ 29,897	$ 20,284,935	$ 11,402,560	$ 35,478	$ 7,507,072	$ 2,670,715	$ 5,826	$ 460,196	$ 33,899	$ 336,691	$ 32,970	$ 299,889	$ 234,742	$ 11,715	$ 530,387	$ 209,112	$ 9,397	$ 43,553	$ 73,660					$ 4,107,816	$ 9,108,334	$ 3,147,279				$ 56,471,391				$ 17,169,307			$ 9,265,527				$ 82,299,371				$ 16,089,855				$ 40,874,860				$ 13,404,552	$ 216,935,224	$ 2,276,211		$ 219,211,435
Sale of Units (including transfers)	3,063	599,571		2,610	65,000							34,027	4,937				1,467			16,141			9,861				182,372							123,835	98,345	267,829	24,575											785,006				67,610							162,799				99,812				283,970				34,436	736,677	696,956		1,433,633
Redemption of Units (including transfers)	(1,682,241)	(30,088,881)	(5,165,979)	(858,657)	(2,033,381)	(2,371,639)	(254,592)	(1,738,353)	(751,844)	(255,931)	(1,099,228)	(18,642,950)	(15,828,193)	(123,043)	(430,276)	(100,517)	(4,000,256)	(529,559)	(6,074)	(7,287,300)	(10,072,894)		(2,039,347)	(1,909,301)		(464,612)		(227,040)		(266,500)	(210,852)	(10,565)	(401,984)	(4,000)	(34,300)	(160,000)	(31,000)											(37,401,713)				(5,490,717)			(4,587,865)				(35,530,963)				(4,570,189)				(17,520,194)				(3,979,648)	(107,270,434)	(1,810,853)		(109,081,287)
Change in control of ownership - Trading Companies																																										(3,638,738)	(10,678,699)	(2,424,186)																			(3,638,738)				(10,678,699)				(2,424,186)
Payment made by the Managing Owner																				32,681	25,384	81																																													58,146
Payment made by Related Party																																																																								58,146		$ 58,146	58,146
Operations attributable to non-controlling interests																																										(469,078)	1,570,365	(144,019)																			(469,078)				1,570,365				(144,019)
Transfer of Units In(Out)	(1,174,984)		1,174,984	(1,571,804)		1,571,804			(1,051,248)		1,051,248
Net increase/(decrease) in Owners' Capital resulting from operations attributable to controlling interests	(3,036)	1,347,310	263,059	(20,233)	98,766	153,475	(6,981)	(194,516)	(2,884)	(63,990)	(144,680)	397,555	781,225	7,175	61,241	24,583	(628,933)	(77,185)	(469)	56,157	200,673	2,202	(41,715)	(64,388)	257	7,777	(3,107)	(22,307)	1,239	(21,390)	10,222	609	19,485	9,708	(3,147)	2,170	(3,589)											1,612,003				210,940			(423,610)				1,300,972				(709,734)				261,202				(109,435)	2,144,668	(2,330)		2,142,338
Owners' Capital, Ending balance at Dec. 31, 2017	$ 2,332,222	$ 9,629,385	$ 9,288,555	$ 2,913,542	$ 3,451,256	$ 5,470,789	$ 246,901	$ 2,472,994	$ 107,619	$ 408,532	$ 970,136	$ 38,744,003	$ 6,829,139	$ 191,276	$ 1,379,971	$ 601,247	$ 5,912,980	$ 795,299	$ 23,354	$ 13,102,614	$ 1,555,723	$ 37,761	$ 5,435,871	$ 697,026	$ 6,083	$ 3,361	$ 213,164	$ 87,344	$ 34,209	$ 11,999	$ 34,112	$ 1,759	$ 147,888	$ 338,655	$ 70,295	$ 153,552	$ 63,646							579,074				21,466,687				11,957,140			4,254,052				48,232,179				6,801,928				14,849,650				6,781,700	112,604,281	1,159,984		113,764,265
Owners' Capital - Units, Beginning balance at Dec. 31, 2016	44,569	284,124	105,594	47,530	41,318	51,022	3,924	33,685	20,628	6,893	10,816	422,530	112,166	1,817	10,380	4,671	112,059	10,444	296	131,283	54,044	214	62,779	15,518	45	3,462	275	2,615	275	2,316	2,222	109	2,720	1,237	70	207	428
Owners' Capital - Units, Sale of Units	26	4,572	8,264	23	505	13,399					8,513	255	25				16			332	127		83				1,421							712	753	1,252	143
Owners' Capital - Units, Redemption of Units (including transfers)	(24,561)	(217,468)	(39,953)	(22,159)	(15,925)	(20,442)	(1,793)	(13,330)	(19,305)	(2,527)	(9,429)	(137,829)	(78,534)	(728)	(2,503)	(678)	(46,573)	(4,452)	(62)	(49,248)	(46,985)		(18,007)	(11,662)		(3,437)		(1,960)		(2,212)	(1,858)	(91)	(1,991)	(23)	(293)	(750)	(194)
Owners' Capital - Units, Ending balance at Dec. 31, 2017	20,035	71,229	73,905	25,393	25,898	43,979	2,131	20,355	1,323	4,366	9,900	284,956	33,657	1,089	7,877	3,993	65,502	5,992	234	82,367	7,186	214	44,855	3,856	45	25	1,696	655	275	104	364	18	729	1,926	530	709	377
Net asset value per unit, Beginning balance at Dec. 31, 2016	$ 116.43	$ 132.94	$ 123.27	$ 112.8	$ 128.78	$ 119.89	$ 129.56	$ 130.8	$ 92.78	$ 105.67	$ 107.5	$ 134.8	$ 194.99	$ 169.05	$ 168.49	$ 144.97	$ 94.06	$ 134.25	$ 101.16	$ 154.51	$ 210.98	$ 166.17	$ 119.58	$ 172.1	$ 128.6
Change in net asset value per unit	(0.02)	2.25	2.41	1.94	4.49	4.51	(2.54)	(1.34)	(1.98)	(0.52)	0.64	1.17	7.91	6.72	6.69	5.59	(3.79)	(1.52)	(1.14)	4.56	5.52	10.27	1.61	7.6	5.68
Net asset value per unit, Ending balance at Dec. 31, 2017	$ 116.41	$ 135.19	$ 125.68	$ 114.74	$ 133.27	$ 124.4	$ 115.81	$ 121.5	$ 81.35	$ 93.59	$ 97.99	$ 135.96	$ 202.9	$ 175.77	$ 175.18	$ 150.56	$ 90.27	$ 132.73	$ 100.02	$ 159.08	$ 216.5	$ 176.44	$ 121.19	$ 179.7	$ 134.28
Sale of Units (including transfers)
Redemption of Units (including transfers)	(354,496)	(988,936)	(1,747,519)	(882,110)	(1,614,113)	(1,765,825)	(147,466)	(344,963)	(79,178)	(151,758)	(399,521)	$ (8,236,418)	$ (1,737,916)	$ (90,924)	$ (351,542)	$ (178,400)	$ (1,052,680)	$ (559,336)	$ (18,274)	$ (3,379,980)	$ (1,092,250)		$ (1,182,575)	$ (18,107)	$ (4,081)		(19,000)	(20,000)	(8,000)	(4,500)	(4,501)		$ (7,000)	$ (52,000)	$ (11,000)	$ (29,000)	$ (7,000)											(3,109,951)				(4,290,048)			(1,131,887)				(10,654,200)				(1,641,290)				(4,501,230)				(1,211,763)	(26,433,650)	(162,000)		(26,595,650)
Change in control of ownership - Trading Companies
Payment made by the Managing Owner												32,070	13,964	100	137	32				(20,121)	31,748																																						46,303								11,627					46,303			46,303
Payment made by Related Party																																																																								11,636		11,636	11,636
Operations attributable to non-controlling interests																																												(67,355)																											(67,355)
Transfer of Units In(Out)																	(1,232)		1,232	49,978	(49,978)
Net increase/(decrease) in Owners' Capital resulting from operations attributable to controlling interests	(274,170)	970,700	(933,262)	(546,954)	(595,533)	(930,303)	(21,337)	(336,614)	(8,390)	(90,789)	(208,694)	(4,835,733)	(701,833)	(12,376)	(135,051)	(67,767)	(1,149,938)	(136,496)	(4,415)	(1,997,047)	(132,076)	(5,679)	(921,571)	(104,927)	(996)	(356)	(21,738)	(15,979)	(6,190)	(1,501)	(9,127)	(506)	(15,867)	(35,558)	(12,927)	(16,954)	(9,685)											(2,200,226)				(2,094,959)			(676,958)				(5,804,185)				(1,303,776)				(2,151,756)				(1,037,179)	(15,067,383)	(146,389)		(15,213,772)
Owners' Capital, Ending balance at Dec. 31, 2018	$ 1,703,556	$ 7,669,749	$ 6,607,774	$ 1,484,478	$ 1,241,610	$ 2,774,661	$ 78,098	$ 1,791,417	$ 20,051	$ 165,985	$ 361,921	$ 25,703,922	$ 4,403,354	$ 88,076	$ 893,515	$ 355,112	$ 3,709,130	$ 99,467	$ 1,897	$ 7,755,444	$ 313,167	$ 32,082	$ 3,331,725	$ 573,992	$ 1,006	$ 3,005	$ 172,426	$ 51,365	$ 20,019	$ 5,998	$ 20,484	$ 1,253	$ 125,021	$ 251,097	$ 46,368	$ 107,598	$ 46,961							511,718				16,156,510				5,572,133			2,445,207				31,820,097				3,856,862				8,208,291				4,465,402	71,161,187	851,595		72,012,782
Owners' Capital - Units, Sale of Units
Owners' Capital - Units, Redemption of Units (including transfers)	(3,374)	(7,760)	(15,234)	(9,097)	(14,366)	(16,442)	(1,341)	(3,072)	(971)	(1,871)	(4,720)	(66,442)	(9,321)	(527)	(2,159)	(1,346)	(13,563)	(5,073)	(211)	(23,421)	(5,513)		(11,481)	(93)	(36)		(165)	(178)	(76)	(43)	(57)		(38)	(325)	(101)	(134)	(69)
Owners' Capital - Units, Ending balance at Dec. 31, 2018	16,661	63,469	58,671	16,296	11,532	27,537	790	17,283	352	2,495	5,180	218,514	24,294	562	5,718	2,643	51,939	919	23	58,946	1,673	214	33,374	3,763	9	25	1,531	477	199	61	307	18	691	1,601	429	575	308								16,661	63,494	60,202		16,296	12,008	27,734		851	17,282		218,514	25,027	2,647		51,939	1,348	23		58,946	2,248	214		33,374	4,071	9
Change in net asset value per unit	$ (14.16)	$ (14.35)	$ (13.06)	$ (23.64)	$ (25.59)	$ (23.63)	$ (16.99)	$ (17.84)	$ (24.55)	$ (27.07)	$ (28.16)	$ (18.33)	$ (21.96)	$ (18.96)	$ (18.92)	$ (16.4)	$ (18.86)	$ (24.54)	$ (17.54)	$ (27.51)	$ (29.33)	$ (26.52)	$ (21.37)	$ (27.17)	$ (22.50)
Net asset value per unit, Ending balance at Dec. 31, 2018	$ 102.25	$ 120.84	$ 112.62	$ 91.1	$ 107.68	$ 100.77	$ 98.82	$ 103.66	$ 56.8	$ 66.52	$ 69.83	$ 117.63	$ 180.94	$ 156.81	$ 156.26	$ 134.16	$ 71.41	$ 108.18	$ 82.48	$ 131.57	$ 187.17	$ 149.92	$ 99.83	$ 152.53	$ 111.78
Sale of Units (including transfers)
Redemption of Units (including transfers)	$ (269,710)	$ (2,063,288)	$ (1,796,772)	$ (1,450,004)	$ (198,224)	$ (1,032,846)	(32,587)	(519,520)	(4,858)	(62,516)	(85,853)	(7,737,266)	(1,238,298)	(45,814)	(16,647)	(122,927)	$ (795,619)	$ (34,192)		$ (3,388,723)	$ (32,395)		$ (995,044)	$ (94,154)			$ (57,500)	$ (33,750)	$ (8,000)	(500)	(9,000)		$ (53,000)	$ (103,000)	$ (15,000)	$ (61,000)	$ (18,500)											(4,244,593)				(2,722,825)			(714,834)				(9,316,952)				(844,811)				(3,482,119)				(1,107,697)	(21,992,853)	(359,250)		(22,352,103)
Change in control of ownership - Trading Companies
Payment made by Related Party
Operations attributable to non-controlling interests																																																																							(32,695)
Transfer of Units In(Out)
Net increase/(decrease) in Owners' Capital resulting from operations attributable to controlling interests	(130,651)	(8,633)	168,639	(21,680)	(205,621)	(376,606)	(8,996)	(280,069)	(3,746)	(29,504)	(68,917)	(169,056)	123,049	1,786	23,715	6,359	(198,460)	(4,365)	$ 8,937	105,259	12,387	$ 965	(41,058)	13,626	$ 7,327	18	1,007	(4,572)	(2,791)	(968)	(3,623)	(260)	1,727	(21,370)	(1,537)	3,460	132											30,380				(611,269)			(396,083)				(33,789)				(195,425)								(19,974)	(1,099,715)	(4,371)		(1,104,086)
Owners' Capital, Ending balance at Dec. 31, 2019	$ 1,303,195	$ 5,597,828	$ 4,979,641	$ 12,794	$ 837,765	$ 1,365,209	$ 36,515	$ 991,828	$ 11,447	$ 73,965	$ 207,151	$ 17,797,600	$ 3,288,105	$ 44,048	$ 900,583	$ 238,544	$ 2,715,051	$ 60,910	$ 10,834	$ 4,471,980	$ 293,159	$ 33,047	$ 2,295,623	$ 493,464	$ 8,333	$ 3,023	$ 115,933	$ 13,043	$ 9,228	$ 4,530	$ 7,861	$ 993	$ 73,748	$ 151,133	$ 29,831	$ 50,058	$ 28,593							$ 479,024				$ 11,999,620				$ 2,238,039			$ 1,334,290				$ 22,493,761				$ 2,816,626				$ 4,848,244				$ 3,305,037	$ 48,068,619	$ 487,974		$ 48,556,593
Owners' Capital - Units, Redemption of Units (including transfers)	(3,771)	(17,427)	(14,839)	(16,119)	(1,922)	(10,844)	(343)	(5,702)	(93)	(1,086)	(1,435)	(66,700)	(6,599)	(288)	(107)	(912)	(11,146)	(333)	115	(24,943)	(153)		(9,838)	(550)	64		(511)	(327)	(86)	(5)	(158)		(294)	(663)	(141)	(315)	(122)
Owners' Capital - Units, Ending balance at Dec. 31, 2019	12,890	46,042	43,832	177	9,610	16,693	447	11,581	259	1,408	3,745	151,814	17,695	274	5,611	1,731	40,793	585	138	34,003	1,520	214	23,536	3,213	73	25	1,021	149	113	56	149	18	397	938	288	260	186								12,890	46,067	44,853		177	9,759	16,806		503	11,581		158,814	18,092	1,731		40,793	873	138		34,003	1,780	214		23,536	3,399	73
Change in net asset value per unit	$ (1.15)	$ 0.74	$ 0.98	$ (18.82)	$ (20.5)	$ (18.99)	$ (17.22)	$ (18.02)	$ (12.6)	$ (13.97)	$ (14.52)	$ (0.4)	$ 4.88	$ 4.23	$ 4.24	$ 3.65	$ (4.85)	$ (4.23)	$ (3.97)	$ (0.05)	$ 5.65	$ 4.51	$ (2.29)	$ 1.06	$ (2.37)
Net asset value per unit, Ending balance at Dec. 31, 2019	$ 101.1	$ 121.58	$ 113.61	$ 72.28	$ 87.18	$ 81.78	$ 81.6	$ 85.64	$ 44.2	$ 52.55	$ 55.31	$ 117.23	$ 185.82	$ 161.04	$ 160.5	$ 137.81	$ 66.56	$ 103.94	$ 78.51	$ 131.52	$ 192.82	$ 154.43	$ 99.83	$ 153.59	$ 111.78

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Financing Activities:
Payment made by Related Party		$ 11,636	$ 58,146
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	$ 30,380	(2,200,226)	1,612,003
Change in:
Net change in ownership allocation of U.S. Treasury securities	1,891,523	(1,138,048)	127,984
Net unrealized (gain)/loss on swap contracts	(464,169)	(643,941)	47,375
Net unrealized (gain)/loss on U.S. Treasury securities	19,045	(33,137)	(152,150)
Net realized (gain)/loss on U.S. Treasury securities	(14,359)	51,245	(65,391)
Net unrealized gain/(loss) on private investment companies	(907,504)	2,307,071	(812,254)
Net realized gain/(loss) on private investment companies	730,551	(278,881)	(1,870,541)
(Purchases) sales of:
Purchases of swap contracts
Sales of U.S. Treasury securities	1,747,952	2,612,077	6,494,979
Purchases of U.S. Treasury securities	(2,190,500)	(2,304,284)	(680,345)
U.S. Treasury interest and premium paid/amortized	(5)	25,935	33,155
Purchase of Private Investment Companies	(4,995,273)	(3,845,201)	(13,430,089)
Reduction of collateral in Swap contracts		1,099,999	2,214,000
Sale of Private Investment Companies	6,950,956	5,234,058	40,457,348
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,136,760	1,064,300	1,976,418
Interest receivable	29,990	(16,890)	106,665
Receivable from related parties	(11,453)		231,671
Other assets	(177,606)
Incentive fees payable to Managing Owner	6,380	(19,227)	12,847
Management fees payable to Managing Owner	(3,875)	(174)	(19,447)
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(8,950)	(16,361)	(85,995)
Service fees payable to Managing Owner	(1,106)	884	3,441
Payables to related parties
Subscriptions in advance for service fee rebates	2,101	20,430
Other liabilities		(26,873)	7,198
Net cash provided by (used in) operating activities	3,770,838	1,892,756	36,193,852
Cash Flows from Financing Activities:
Proceeds from sale of capital			785,006
Payment for redemption of capital	(4,187,270)	(3,109,951)	(37,401,713)
Payment made by the Managing Owner
Pending owner additions
Advance on unrealized Swap Appreciation		1,500,000
Change in owner redemptions payable			(61,482)
Net cash provided by (used in) financing activities	(4,187,270)	(1,609,951)	(36,678,189)
Net increase (decrease) in cash and cash equivalents	(416,432)	282,805	(484,337)
Cash and cash equivalents, beginning of period	472,695	189,890	674,227
Cash and cash equivalents, end of period	56,263	472,695	189,890
The Series of the Frontier Funds [Member] | Frontier Masters Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(611,269)	(2,094,959)	210,940
Change in:
Net change in ownership allocation of U.S. Treasury securities	651,757	1,757,672	(1,584,958)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	9,501	15,571	70,651
Net realized (gain)/loss on U.S. Treasury securities	(15,346)	45,198	(88,761)
Net unrealized gain/(loss) on private investment companies	162,637	1,197,208	(794,590)
Net realized gain/(loss) on private investment companies	(159,651)	75,682	(482,146)
(Purchases) sales of:
Purchases of swap contracts
Sales of U.S. Treasury securities	632,031	1,784,721	5,524,387
Purchases of U.S. Treasury securities	(1,175,606)	(2,106,696)	(1,611,333)
U.S. Treasury interest and premium paid/amortized	4,656	14,162	340,843
Purchase of Private Investment Companies	(1,894,552)	(3,476,046)	(8,435,434)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	4,353,896	5,948,998	6,958,710
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	764,083	726,054	5,176,964
Interest receivable	2,217	29,657	47,718
Receivable from related parties			153,157
Other assets		2,974	(2,974)
Incentive fees payable to Managing Owner
Management fees payable to Managing Owner	(8,347)	(602)	(41,225)
Interest payable to Managing Owner
Trading fees payable to Managing Owner	(16,311)	(21,147)	(8,759)
Service fees payable to Managing Owner	(1,546)	(1,820)	(5,467)
Payables to related parties
Subscriptions in advance for service fee rebates	3,529	28,100
Other liabilities	499		(7,590)
Net cash provided by (used in) operating activities	2,702,090	3,924,727	5,420,133
Cash Flows from Financing Activities:
Proceeds from sale of capital			67,610
Payment for redemption of capital	(2,722,825)	(4,290,048)	(5,490,717)
Payment made by the Managing Owner
Pending owner additions
Advance on unrealized Swap Appreciation
Change in owner redemptions payable			(131,840)
Net cash provided by (used in) financing activities	(2,722,825)	(4,290,048)	(5,554,947)
Net increase (decrease) in cash and cash equivalents	(20,735)	(365,321)	(134,814)
Cash and cash equivalents, beginning of period	46,374	411,695	546,509
Cash and cash equivalents, end of period	25,639	46,374	411,695
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(396,083)	(676,958)	(423,610)
Change in:
Net change in ownership allocation of U.S. Treasury securities	(392,620)	(181,417)	(1,561,530)
Net unrealized (gain)/loss on swap contracts	116,581	(82,062)	(26,621)
Net unrealized (gain)/loss on U.S. Treasury securities	(2,447)	(14,319)	10,631
Net realized (gain)/loss on U.S. Treasury securities	(977)	40,742	(21,587)
Net unrealized gain/(loss) on private investment companies	(198,426)	403,889	246,722
Net realized gain/(loss) on private investment companies	428,509	240,941	106,289
(Purchases) sales of:
Purchases of swap contracts
Sales of U.S. Treasury securities	1,130,160	1,492,432	1,253,375
Purchases of U.S. Treasury securities	(594,391)	(938,178)	(314,797)
U.S. Treasury interest and premium paid/amortized	2,018	13,128	19,105
Purchase of Private Investment Companies	(1,222,587)	(1,544,848)	(3,118,307)
Reduction of collateral in Swap contracts			3,850,050
Sale of Private Investment Companies	1,734,988	2,189,349	6,461,867
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	13,452	93,346	(121,510)
Interest receivable	2,876	7,953	(12,125)
Receivable from related parties			87,670
Other assets		5,122	(5,123)
Incentive fees payable to Managing Owner	60,871	(3,789)	(57,082)
Management fees payable to Managing Owner
Interest payable to Managing Owner		(103)	103
Trading fees payable to Managing Owner	(1,838)	(3,819)	(14,353)
Service fees payable to Managing Owner	(51)	(121)	(3,370)
Payables to related parties			(1,603,124)
Subscriptions in advance for service fee rebates
Other liabilities	887		(6,870)
Net cash provided by (used in) operating activities	680,921	1,041,287	4,745,803
Cash Flows from Financing Activities:
Proceeds from sale of capital
Payment for redemption of capital	(714,834)	(1,131,887)	(4,587,865)
Payment made by the Managing Owner
Pending owner additions
Advance on unrealized Swap Appreciation
Change in owner redemptions payable	6,585		(5,738)
Net cash provided by (used in) financing activities	(708,249)	(1,131,887)	(4,593,603)
Net increase (decrease) in cash and cash equivalents	(27,328)	(90,600)	152,200
Cash and cash equivalents, beginning of period	61,600	152,200
Cash and cash equivalents, end of period	34,272	61,600	152,200
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(33,789)	(5,804,185)	1,300,972
Change in:
Net change in open trade equity, at fair value	104,475	(42,107)	278,690
Net realized gain/(loss) on futures, forwards and options			381,817
Net change in ownership allocation of U.S. Treasury securities	1,464,296	851,183	5,251,272
Net unrealized (gain)/loss on swap contracts	(1,149,846)	(1,453,948)	84,491
Net unrealized (gain)/loss on U.S. Treasury securities	(1,058)	13,623	(149,968)
Net realized (gain)/loss on U.S. Treasury securities	(12,809)	57,886	(76,560)
Net unrealized gain/(loss) on private investment companies	(1,457,717)	4,729,444	(270,252)
Net realized gain/(loss) on private investment companies	921,909	(774,004)	(4,398,507)
(Purchases) sales of:
Sales of U.S. Treasury securities	1,030,440	2,911,825	5,221,235
Purchases of U.S. Treasury securities	(2,613,278)	(3,335,991)	(1,219,257)
U.S. Treasury interest and premium paid/amortized	46,019	41,873	79,587
Purchase of Private Investment Companies	(8,169,633)	(8,275,992)	(17,346,028)
Reduction of collateral in Swap contracts		1,999,999	7,514,000
Sale of Private Investment Companies	17,749,875	11,968,285	36,818,166
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	1,694,132	1,433,177	2,185,757
Interest receivable	(1,726)	10,548	169,263
Receivable from futures commission merchants	157,058	4,774,797	(810,998)
Change in control of ownership - trading companies
Change in control of ownership - private investment companies
Receivable from other series			(184,106)
Receivable from related parties			346,875
Due from Managing Owner		184,106
Other assets	(380,111)	(40,189)
Incentive fees receivable to Managing Owner		2,452	40,189
Management fees payable to Managing Owner	(5,122)	(1,038)	(13,752)
Interest payable to Managing Owner	(1,385)	(39,098)	(19,078)
Trading fees payable to Managing Owner	(31,591)	(31,358)	(62,456)
Service fees payable to Managing Owner	(15,156)	241	(41,807)
Risk analysis fees payable	(662)		7,731
Subscriptions in advance for service fee rebates	61,504	258,194
Other liabilities	2,372	(155,425)	65,839
Net cash provided by (used in) operating activities	9,358,197	9,284,298	35,153,115
Cash Flows from Financing Activities:
Proceeds from sale of capital			162,799
Payment for redemption of capital	(9,292,547)	(10,654,364)	(35,530,963)
Payment made by the Managing Owner		46,303
Pending owner additions
Advance on unrealized Swap Appreciation		1,250,000
Owner redemptions payable	15,300	(53,013)	(704,198)
Net cash provided by (used in) financing activities	(9,277,247)	(9,411,074)	(36,072,362)
Net increase (decrease) in cash and cash equivalents	80,950	(126,776)	(919,247)
Cash and cash equivalents, beginning of period	37,556	164,332	1,083,579
Cash and cash equivalents, end of period	118,506	37,556	164,332
The Series of the Frontier Funds [Member] | Frontier Select Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(195,425)	(1,303,776)	(1,178,812)
Change in:
Net change in open trade equity, at fair value			243,762
Net realized gain/(loss) on futures, forwards and options			148,184
Net change in ownership allocation of U.S. Treasury securities	(1,015,753)	658,029	129,027
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	(3,636)	14,160	6,069
Net realized (gain)/loss on U.S. Treasury securities	397	13,509	(31,037)
Net unrealized gain/(loss) on private investment companies	149,095	919,512	(456,301)
Net realized gain/(loss) on private investment companies	(170,272)	26,405	41,515
(Purchases) sales of:
Sales of U.S. Treasury securities	2,633,295	631,678	2,695,392
Purchases of U.S. Treasury securities	(1,640,515)	(944,467)	(404,508)
U.S. Treasury interest and premium paid/amortized	(5)	9,132	53,241
Purchase of Private Investment Companies	(1,279,910)	(2,612,993)	(7,419,460)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	2,368,922	3,994,230	2,255,017
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	17,825	147,683	3,534,079
Interest receivable	(570)	7,462	45,203
Receivable from futures commission merchants			8,208,218
Change in control of ownership - trading companies			(3,638,738)
Change in control of ownership - private investment companies
Receivable from other series
Receivable from related parties			103,407
Due from Managing Owner
Other assets
Incentive fees receivable to Managing Owner
Management fees payable to Managing Owner			(21,219)
Interest payable to Managing Owner		(1,358)	(2,160)
Trading fees payable to Managing Owner	(1,812)	(7,086)	(3,231)
Service fees payable to Managing Owner	(1,669)	(6,168)	(11,223)
Risk analysis fees payable			(2,303)
Subscriptions in advance for service fee rebates	5,733	11,162
Other liabilities	8,509	(5,725)	(6,214)
Net cash provided by (used in) operating activities	874,209	1,551,389	4,287,908
Cash Flows from Financing Activities:
Proceeds from sale of capital			99,812
Payment for redemption of capital	(844,811)	(1,641,290)	(4,570,189)
Payment made by the Managing Owner
Pending owner additions
Advance on unrealized Swap Appreciation
Owner redemptions payable	6,875		(134,579)
Net cash provided by (used in) financing activities	(837,936)	(1,641,290)	(4,604,956)
Net increase (decrease) in cash and cash equivalents	36,273	(89,901)	(317,048)
Cash and cash equivalents, beginning of period	25,072	114,973	432,021
Cash and cash equivalents, end of period	61,345	25,072	114,973
The Series of the Frontier Funds [Member] | Frontier Global Fund (Formerly Frontier Winton Fund) [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	122,072
Change in:
Net change in open trade equity, at fair value
Net realized gain/(loss) on futures, forwards and options
Net change in ownership allocation of U.S. Treasury securities	(2,166,060)
Net unrealized (gain)/loss on swap contracts
Net unrealized (gain)/loss on U.S. Treasury securities	19,535
Net realized (gain)/loss on U.S. Treasury securities	(13,736)
Net unrealized gain/(loss) on private investment companies	168,651
Net realized gain/(loss) on private investment companies	(1,144,681)
(Purchases) sales of:
Sales of U.S. Treasury securities	8,701,245
Purchases of U.S. Treasury securities	(3,463,172)
U.S. Treasury interest and premium paid/amortized	(2)
Purchase of Private Investment Companies	(4,899,754)
Reduction of collateral in Swap contracts
Sale of Private Investment Companies	852,817
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	4,280,256
Interest receivable	63,454
Receivable from futures commission merchants
Change in control of ownership - trading companies
Receivable from related parties
Due from Managing Owner
Other assets
Management fees payable to Managing Owner	(42,705)
Interest payable to Managing Owner	(8,068)
Trading fees payable to Managing Owner	(1,813)
Service fees payable to Managing Owner	(6,540)
Risk analysis fees payable
Payables to related parties
Subscriptions in advance for service fee rebates	16,744
Other liabilities	8,543
Due to Managing Owner
Net cash provided by (used in) operating activities	2,486,786
Cash Flows from Financing Activities:
Proceeds from sale of capital
Payment for redemption of capital	(3,482,119)
Payment made by the Managing Owner
Pending owner additions
Advance on unrealized Swap Appreciation
Change in owner redemptions payable	71,379
Net cash provided by (used in) financing activities	(3,410,740)
Net increase (decrease) in cash and cash equivalents	(923,954)
Cash and cash equivalents, beginning of period	951,485
Cash and cash equivalents, end of period	27,532	951,485
The Series of the Frontier Funds [Member] | Frontier Global Fund (Formerly Frontier Winton Fund) [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations		(2,151,756)	1,831,567
Change in:
Net change in open trade equity, at fair value			922,290
Net realized gain/(loss) on futures, forwards and options			12,413,285
Net change in ownership allocation of U.S. Treasury securities		(1,958,364)
Net unrealized (gain)/loss on swap contracts			(4,430,276)
Net unrealized (gain)/loss on U.S. Treasury securities		(168,599)	147,980
Net realized (gain)/loss on U.S. Treasury securities		301,015	(88,761)
Net unrealized gain/(loss) on private investment companies
Net realized gain/(loss) on private investment companies
(Purchases) sales of:
Sales of U.S. Treasury securities		11,956,435	5,762,412
Purchases of U.S. Treasury securities		(7,726,537)	(8,456,714)
U.S. Treasury interest and premium paid/amortized		137,325	87,836
Purchase of Private Investment Companies
Reduction of collateral in Swap contracts
Sale of Private Investment Companies
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value		3,695,499	815,385
Interest receivable		47,335	178,152
Receivable from futures commission merchants			17,996,697
Change in control of ownership - trading companies			(10,678,699)
Receivable from related parties		58,146	551,508
Due from Managing Owner			(58,146)
Other assets
Management fees payable to Managing Owner		(10,334)	(203,785)
Interest payable to Managing Owner		(12,868)	(9,738)
Trading fees payable to Managing Owner		(19,220)	(11,569)
Service fees payable to Managing Owner		(8,911)	(12,656)
Risk analysis fees payable			(12,215)
Payables to related parties
Subscriptions in advance for service fee rebates		133,281
Other liabilities		(82,265)	79,384
Due to Managing Owner		(152,219)	152,219
Net cash provided by (used in) operating activities		4,037,963	16,976,157
Cash Flows from Financing Activities:
Proceeds from sale of capital			283,970
Payment for redemption of capital		(4,501,230)	(17,520,194)
Payment made by the Managing Owner		11,627	58,146
Pending owner additions
Advance on unrealized Swap Appreciation
Change in owner redemptions payable			(23,162)
Net cash provided by (used in) financing activities		(4,489,603)	(17,201,240)
Net increase (decrease) in cash and cash equivalents		(451,640)	(225,083)
Cash and cash equivalents, beginning of period		1,403,125	1,628,208
Cash and cash equivalents, end of period			1,403,125
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(52,669)	(1,104,534)	(253,454)
Change in:
Net change in open trade equity, at fair value
Net realized gain/(loss) on futures, forwards and options			(1,282,594)
Net change in ownership allocation of U.S. Treasury securities	(438,164)	29,426	297,047
Net unrealized (gain)/loss on swap contracts	67,436	138,924
Net unrealized (gain)/loss on U.S. Treasury securities	(1,244)	(18,865)	2,204
Net realized (gain)/loss on U.S. Treasury securities	(3,162)	47,081	(65,391)
Net unrealized gain/(loss) on private investment companies	146,186	125,458	(2,795)
Net realized gain/(loss) on private investment companies	(430,724)	306,863	(206,064)
(Purchases) sales of:
Sales of U.S. Treasury securities	2,403,609	1,878,837	4,774,913
Purchases of U.S. Treasury securities	(1,595,028)	(1,357,069)	(846,887)
U.S. Treasury interest and premium paid/amortized	(6)	23,530	72,784
Purchase of Private Investment Companies	(1,165,676)	(713,437)	(2,620,781)
Reduction of collateral in Swap contracts			5,000,000
Sale of Private Investment Companies	1,358,415	886,228	56,647
Increase and/or decrease in:
Investments in unconsolidated trading companies, at fair value	707,795	820,288	1,197,666
Interest receivable	7,564	11,497	48,448
Receivable from futures commission merchants
Change in control of ownership - trading companies			(2,424,186)
Receivable from related parties			131,430
Due from Managing Owner
Other assets
Management fees payable to Managing Owner	(9,201)	(4,270)	(43,030)
Interest payable to Managing Owner	(1,072)	(1,370)	(4,811)
Trading fees payable to Managing Owner	981	(5,514)	(2,250)
Service fees payable to Managing Owner	(1,322)	(4,799)	(4,974)
Risk analysis fees payable
Payables to related parties		(697)
Subscriptions in advance for service fee rebates	10,973	46,159
Other liabilities	1,488	(16,037)	(2,048)
Due to Managing Owner
Net cash provided by (used in) operating activities	1,006,876	1,087,699	3,821,874
Cash Flows from Financing Activities:
Proceeds from sale of capital			34,436
Payment for redemption of capital	(1,107,696)	(1,211,763)	(3,979,648)
Payment made by the Managing Owner
Pending owner additions
Advance on unrealized Swap Appreciation
Change in owner redemptions payable	9,735
Net cash provided by (used in) financing activities	(1,097,961)	(1,211,763)	(3,945,212)
Net increase (decrease) in cash and cash equivalents	(91,085)	(124,064)	(123,338)
Cash and cash equivalents, beginning of period	135,096	259,161	382,499
Cash and cash equivalents, end of period	44,011	135,096	259,161
Frontier Funds [Member]
Cash Flows from Operating Activities:
Net increase/(decrease) in capital resulting from operations	(1,104,086)	(15,213,772)	2,142,338
Change in:
Net change in open trade equity, at fair value	(568,782)	1,966,603	577,793
Net change in ownership allocation of U.S. Treasury securities	(1,429,998)	(2,041,029)	402,290
Net unrealized (gain)/loss on U.S. Treasury securities	39,696	(191,566)	184,479
Net realized (gain)/loss on U.S. Treasury securities	(59,992)	556,676	(686,550)
Net unrealized gain/(loss) on private investment companies	(3,941,384)	10,259,391	(90,112)
Net realized gain/(loss) on private investment companies	2,575,249	(544,849)	(7,844,635)
(Purchases) sales of:
Sales of U.S. Treasury securities	18,278,732	23,268,005	45,040,554
Purchases of U.S. Treasury securities	(13,272,491)	(18,713,224)	(13,304,662)
U.S. Treasury interest and premium paid/amortized	85,741	292,200	635,996
Purchase of Private Investment Companies	(23,944,617)	(24,123,914)	(53,856,821)
Reduction of collateral in Swap contracts		2,750,000	18,578,050
Sale of Private Investment Companies	36,009,558	34,776,548	102,575,451
Increase and/or decrease in:
Interest receivable	103,805	97,562	583,323
Receivable from futures commission merchants	8,729,606	9,328,754	12,267,411
Receivable from related parties	(11,453)	58,146	29,524
Other assets	(557,717)
Incentive fees receivable to Managing Owner			(57,082)
Incentive fees payable to Managing Owner	67,948	(63,902)	53,036
Management fees payable to Managing Owner	(69,250)	(12,927)	(342,458)
Interest payable to Managing Owner	(10,525)	(15,155)	(37,268)
Trading fees payable to Managing Owner	(61,334)	(112,244)	(188,614)
Service fees payable to Managing Owner	(27,390)	(52,293)	(91,075)
Risk analysis fees payable	(19,097)	1,986	9,903
Payables to related parties			(85,078)
Subscriptions in advance for service fee rebates	100,716	497,326
Other liabilities	18,075	(274,980)	134,935
Due to Managing Owner		31,887	(31,887)
Net cash provided by (used in) operating activities	20,879,917	22,525,229	106,598,841
Cash Flows from Financing Activities:
Proceeds from sale of capital			1,433,633
Payment for redemption of capital	(22,352,102)	(26,595,650)	(109,081,287)
Payment made by the Managing Owner		46,303
Advance on unrealized Swap Appreciation		3,099,998
Payment made by Related Party		11,636	58,146
Owner redemptions payable	109,874	(53,014)	(1,060,999)
Net cash provided by (used in) financing activities	(22,242,228)	(23,490,727)	(108,650,507)
Net increase (decrease) in cash and cash equivalents	(1,362,311)	(965,498)	(2,051,666)
Cash and cash equivalents, beginning of period	1,729,879	2,695,377	4,747,043
Cash and cash equivalents, end of period	$ 367,568	$ 1,729,879	$ 2,695,377

Organization and Purpose

Organization and Purpose	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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 (the "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 (formerly Frontier Winton 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 entities ("Galaxy Plus"). 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 vested 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 (formerly Frontier Winton 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 December 31, 2019, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund, separates Units into three separate Classes—Class 1, 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. As of December 31, 2019, and 2018, Frontier Global Fund has invested a portion of its assets in a single Trading Company, and a single Trading Advisor manages 100% of the assets invested in such Trading Company. Each of the remaining 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	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 in Commodity Futures Trading Commission ("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 entities ("Galaxy Plus"). 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 vested 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 (formerly Frontier Winton 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 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, is maintained in the books and records of each Series. As of December 31, 2019, the Trust, with respect to the Frontier Diversified Fund and Frontier Masters Fund, separates Units into three separate Classes—Class 1, 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, 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. As of December 31, 2018, and December 31, 2019, Frontier Global Fund has invested a portion of its assets in a single Trading Company, and a single Trading Advisor manages 100% of the assets invested in such Trading Company. Each of the remaining 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	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series ownership percentage in Galaxy Plus. 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. As of December 31, 2019, and 2018, the consolidated statements of financial condition of Frontier Balanced Fund included the assets and liabilities of its wholly owned interests in Frontier Trading Company I, LLC and Frontier Trading Company XXXIV, LLC. For the year ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Balanced Fund included the earnings of its wholly owned interest in Frontier Trading Company I, LLC and Frontier Trading Company XXXIV, LLC. As of December 31, 2019, and 2018, the consolidated statements of financial condition of Frontier Long/Short Commodity Fund included the assets and liabilities of its wholly owned Trading Company, Frontier Trading Company XXXVII, LLC. For the years ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Long/Short Commodity Fund included the earnings of its wholly owned Trading Company listed above. As of December 31, 2019, and 2018, the consolidated statements of financial condition of Frontier Diversified Fund included the assets and liabilities of its wholly owned Frontier Trading Company XXXV, LLC. For the years ended December 31, 2019, 2018, and 2017 the consolidated statements of operations of Frontier Diversified Fund included the earnings of its wholly owned Trading Company listed above. As of and for the years ended December 31, 2019, 2018, and 2017, the consolidated statements of financial condition and statement of operations of Frontier Heritage Fund included the assets and liabilities, and earnings, respectively, of its majority owned Trading Company, Frontier Trading Company XXXIX, LLC. For the year ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Select Fund included the earnings of its majority owned Trading Company, Frontier Trading Company XV, LLC through the period that Trading Company XV, LLC ceased operation on May 9, 2017. For the year ended December 31, 2016, the consolidated statement of operations of Frontier Select Fund included the earnings of its majority owned Trading Company listed above. For the year ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Global Fund include the earnings of its majority owned Trading Company, Frontier Trading Company II, LLC from January 1, 2017 through December 14, 2017. As of and for the years ended December 31, 2019, 2018 and 2017, Frontier Master Fund did not have a majority interest in any Trading Company. Each of the Series has invested in Frontier Trading Company XXXVIII, LLC on the same basis as its ownership in the cash pool. Frontier Trading Company XXXVIII, LLC's assets, liabilities and earnings are allocated to all of the Series of the Trust based on their proportionate share of the cash pool. Each Series investment in the Frontier Trading Company XXXVIII, LLC is listed under Investments in unconsolidated trading companies, at fair value on the Statements of Financial Condition. Change in Consolidation Method 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— 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 2016 through 2019 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 2017, 2018 and 2019, 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 2020 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 $22,531, $220, $31,541, $319,698, $16,895, $150,025 and $57,132 for the Frontier Diversified, Long/Short Commodity, Masters, Balanced, Select, Global and Heritage Funds, respectively, as of December 31, 2019. 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, follows the provisions of ASC 855, Subsequent Events
Frontier Funds [Member]
Significant Accounting Policies	2. Significant Accounting Policies The following are the significant accounting policies of the Trust. Basis of Presentation Consolidation Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust ownership percentage in Galaxy Plus. 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. Change in Consolidation Method— 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— 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 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 2019, 2018 and 2017, 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 2020 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 $598,042 as of December 31, 2019. 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	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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 upon daily reports from the counterparty. In addition, a third party takes the inputs from the counterparty, makes certain adjustments, and runs it through their pricing model to come up with their daily price. The fair value measurements of the swap contracts are valued using unadjusted inputs that were not internally developed. The Managing Owner reviews and compares approves current day pricing of the CTA positions, as received from the counterparty which includes intra-day volatility and volume and daily index performance, as well as from the third party. Differences in prices exceeding 5% are investigated. Unexplainable differences are escalated to the Managing Owner's Valuation Committee for evaluation and resolution. Swap contracts are reported at fair value using Level 3 inputs. 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 December 31, 2019 and December 31, 2018 segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. December 31, 2019 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 24,150 $ - $ - $ 24,150 Swap Contracts - - 6,384,583 6,384,583 U.S. Treasury Securities 99,605 - - 99,605 Frontier Masters Fund Investment in Unconsolidated Trading Companies 11,005 - - 11,005 U.S. Treasury Securities 45,391 - - 45,391 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 14,711 - - 14,711 Swap Contracts - - 362,521 362,521 U.S. Treasury Securities 60,673 - - 60,673 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 50,867 - - 50,867 Open Trade Equity (Deficit) 57,057 59,127 - 116,184 Swap Contracts - - 11,944,753 11,944,753 U.S. Treasury Securities 209,799 - - 209,799 Frontier Select Fund Investment in Unconsolidated Trading Companies 26,331 - 479,024 505,355 U.S. Treasury Securities 108,603 - - 108,603 Frontier Winton Fund Investment in Unconsolidated Trading Companies 11,818 - - 11,818 U.S. Treasury Securities 48,741 - - 48,741 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 18,891 - - 18,891 Swap Contracts - - 2,888,008 2,888,008 U.S. Treasury Securities 77,916 - - 77,916 December 31, 2018 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 1,157,971 $ 2,939 $ - $ 1,160,910 Swap Contracts - - 5,920,414 5,920,414 U.S. Treasury Securities 1,553,261 - - 1,553,261 Frontier Masters Fund Investment in Unconsolidated Trading Companies 772,732 2,356 - 775,088 U.S. Treasury Securities 152,384 - - 152,384 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 28,163 - - 28,163 Swap Contracts - - 479,102 479,102 U.S. Treasury Securities 202,415 - - 202,415 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 1,739,609 5,390 - 1,744,999 Open Trade Equity (Deficit) 242,860 (22,201 ) - 220,659 Swap Contracts - - 10,794,908 10,794,908 U.S. Treasury Securities 123,409 - - 123,409 Frontier Select Fund Investment in Unconsolidated Trading Companies 11,462 - 511,718 523,180 U.S. Treasury Securities 82,386 - - 82,386 Frontier Winton Fund Investment in Unconsolidated Trading Companies 4,280,023 12,052 - 4,292,075 U.S. Treasury Securities 3,126,551 - - 3,126,551 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 724,614 2,072 - 726,686 Swap Contracts - - 2,955,444 2,955,444 U.S. Treasury Securities 443,921 - - 443,921 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 the year ended December 31, 2019 and 2018, 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. 2019 For the Year Ended December 31, 2019 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 10,794,908 $ 479,102 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 1,149,845 (116,581 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2019 $ 11,944,753 $ 362,521 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 5,920,414 $ 2,955,444 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 464,169 (67,435 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2019 $ 6,384,583 $ 2,888,009 For the Twelve Months Ended December 31, 2019 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 511,718 Change in fair value of investments in unconsolidated trading companies (32,694 ) 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, 2019 $ 479,024 2018 For the Year Ended December 31, 2018 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 11,340,959 $ 397,039 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 1,453,948 82,063 Proceeds from collateral reduction (1,999,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 10,794,908 $ 479,102 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 6,376,472 $ 3,094,367 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 643,941 (138,923 ) Proceeds from collateral reduction (1,099,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 5,920,414 $ 2,955,444 For the Twelve Months Ended December 31, 2018 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 579,073 Change in fair value of investments in unconsolidated trading companies (67,355 ) 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, 2018 $ 511,718 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 years ended December 31, 2019 and 2018, 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 own the Frontier Brevan Howard swap. The Frontier Heritage Fund owns the majority interest in the Frontier Brevan Howard swap. The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2019. Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 464,169 $ (116,581 ) $ 1,149,845 $ (67,436 ) Frontier Select Fund Investments in Unconsolidated Trading Companies $ (32,694 ) The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2018. Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 643,941 $ 82,063 $ 1,453,948 $ (138,923 ) The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2017. Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ (47,375 ) $ 26,621 $ (84,491 ) $ (297,04 7 )
Frontier Funds [Member]
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 December 31, 2019 and 2018, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value: December 31, 2019 Level 1 Level 2 Level 3 Fair Value Open Trade Equity (Deficit) 57,056 59,128 - $ 116,184 Swap Contracts - - 21,579,865 21,579,865 U.S. Treasury Securities 650,728 - - 650,728 December 31, 2018 Level 1 Level 2 Level 3 Total Open Trade Equity (Deficit) $ (400,796 ) $ 2,607 $ - $ (398,189 ) Swap Contracts - - 20,149,868 20,149,868 U.S. Treasury Securities 5,684,327 - - 5,684,327 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 ended Balance of recurring Level 3 assets as of January 1, 2019 20,149,868 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 1,429,997 Proceeds from collateral reduction - Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2019 21,579,865 For the Year ended Balance of recurring Level 3 assets as of January 1, 2018 $ 21,208,838 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 2,041,028 Proceeds from collateral reduction (3,099,998 ) Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2018 $ 20,149,868 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 years ended December 31, 2019 and 2018, 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, 2019: Swaps $1,429,997 The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2018: Swaps $2,041,028.

Swap Contract

Swap Contract	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Swap Contracts	4. Swap Contracts In addition to authorizing Trading Advisors to manage pre-determined 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, 2019, and December 31, 2018, approximately 2.4% and 1.6% respectively, 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. As of December 31, 2019, the Frontier Balanced Fund, the Frontier Diversified Fund, the Frontier Long/Short Commodity Fund and Frontier Heritage Fund, had $6,176,555, $4,000,000, $115,000, and $1,900,000, respectively, in cash holdings as shown in the Series' Statements of Financial Conditions under advance on unrealized swap appreciation, which relates to the Trading Companies' total return swaps with Deutsche Bank AG. The Series have invested in the following swaps as of and for the year ended December 31, 2019: Frontier Balanced Fund Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Heritage Fund Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 11,858,754 $ 6,298,583 $ 332,571 $ 1,912,559 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,149,846 $ 464,169 $ (116,581 ) $ (67,435 ) Fair Value as of December 31, 2019 $ 11,944,754 $ 6,384,583 $ 362,521 $ 2,888,009 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Series have invested in the following swaps as of and for the year ended December 31, 2018: Frontier Balanced Fund Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Heritage Fund Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )
Frontier Funds [Member]
Swap Contracts	4. Swap Contracts In addition to authorizing Trading Advisors to manage pre-determined 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, 2019, and 2018, approximately 2.4% or $1,177,400 and 1.6% or $1,180,900, respectively, of the Trust’s assets were deposited with over-the-counter counterparties in order to initiate and maintain swaps and is recorded as swap contracts, at fair value on the Statements of Financial Condition of the Trust. This cash held with the counterparty is not restricted. 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. As of December 31, 2019, the XXXIV Balanced select swap, the XXXV Diversified select swap, the XXXVII Long/Short select swap and Brevan Howard Swap, had $6,176,555, $4,000,000, $115,000, and $1,900,000, respectively, in cash holdings as shown in the Series’ Statements of Financial Conditions under advance on unrealized swap appreciation, which relates to the Trading Companies’ total return swaps with Deutsche Bank AG The Trust had invested in the following swaps as of and for the year ended December 31, 2019: XXXIV Balanced select swap XXXV Diversified select swap XXXVII L/S select swap Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 11,858,754 $ 6,298,583 $ 332,571 $ 1,912,559 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,149,846 $ 464,169 $ (116,581 ) $ (67,435 ) Fair Value as of December 31, 2019 $ 11,944,754 $ 6,384,583 $ 362,521 $ 2,888,009 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Trust had invested in the following swaps as of and for the year ended December 31, 2018: XXXIV Balanced select swap XXXV Diversified select swap XXXVII L/S select swap Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )

Investments in Unconsolidated T

Investments in Unconsolidated Trading Companies and Private Investment Companies	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Investments in Private Investment Companies/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 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 following table summarizes each of the Series' investments in unconsolidated Trading Companies as of December 31, 2019 and 2018: As of December 31, 2019 As of December 31, 2018 Percentage of Fair Value Percentage of Fair Value Series Frontier Diversified Series — Frontier Trading Companies II and XXXVIII 0.20 % $ 24,150 7.19 % $ 1,160,910 Frontier Masters Series — Frontier Trading Companies II and XXXVIII 0.49 % $ 11,005 13.91 % $ 775,088 Frontier Long/Short Commodity Series — Frontier Trading Company XXXVIII 1.10 % $ 14,711 1.15 % $ 28,163 Frontier Balanced Series — Frontier Trading Companies II and XXXVIII 0.23 % $ 50,867 5.48 % $ 1,744,999 Frontier Select Series — Frontier Trading Companies XXXVIII and XXXIX 17.94 % $ 505,355 13.56 % $ 523,180 Frontier Winton Fund Frontier Trading Companies II and XXXVIII 0.25 % $ 11,818 52.30 % $ 4,292,075 Frontier Heritage Series — Frontier Trading Companies II and XXXVIII 0.57 % $ 18,891 16.27 % $ 726,686 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 Series 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 Diversified Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Quantmetrics Feeder Fund (527) 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 Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Masters Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Long/Short Commodity Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Balanced Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) 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 Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Select Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Weekly None Frontier Heritage Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Weekly None
Frontier Funds [Member]
Investments in Private Investment Companies/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 entities are made up a feeder funds in which the Trust invests 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 Trust’s total capital. 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 - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Quantmetrics Feeder Fund (527) 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 Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None

Transactions with Affiliates

Transactions with Affiliates	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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 has invested in a swap, a Trading Advisor does not receive any management fees directly from the Series for such swap, and instead the relevant Trading Advisor receives compensation via the fees embedded in the swap. As of December 31, 2019 and 2018, 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 has 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— The Managing Owner has determined that the purchase of additional units of the relevant series will commence in 2020. 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 $22,531, $220, $31,541, $319,698, $16,895, $150,025 and $57,132 for the Frontier Diversified, Long/Short Commodity, Masters, Balanced, Select, Global and Heritage Funds, respectively. The following table summarizes fees earned by the Managing Owner and the Former Managing Owner for the years ended December 31, 2019, 2018 and 2017. For the Year Ended December 31, 2019 Incentive (Rebate) Fees Management Fee Service Trading Frontier Diversified Fund $ - $ 2,668 $ 44,726 $ 493,585 Frontier Masters Fund - 7,665 11,635 213,153 Frontier Long/Short Commodity Fund - - 562 54,334 Frontier Balanced Fund - 22,377 606,359 972,678 Frontier Select Fund - - 102,692 85,589 Frontier Global Fund (Formerly Frontier Winton Fund) - 38,679 177,833 278,497 Frontier Heritage Fund - 7,289 84,518 118,979 For the Year Ended December 31, 2018 Incentive Management Service Trading Frontier Diversified Fund $ (4,499 ) $ 44,289 $ 58,473 $ 591,665 Frontier Masters Fund - 108,413 49,049 420,391 Frontier Long/Short Commodity Fund (3,789 ) - 1,653 82,890 Frontier Balanced Fund 145,134 77,495 920,570 1,378,226 Frontier Select Fund - - 132,408 117,056 Frontier Winton Fund - 487,698 318,897 307,053 Frontier Heritage Fund 697 120,602 123,257 142,735 For the Year Ended December 31, 2017 Incentive Management Service Trading Frontier Diversified Fund $ (50,661 ) $ 69,478 $ 132,465 $ 1,347,386 Frontier Masters Fund - 184,365 89,344 672,227 Frontier Long/Short Commodity Fund (144,752 ) - 13,672 234,923 Frontier Balanced Fund 40,189 107,368 1,409,337 2,058,870 Frontier Select Fund - 84,734 220,938 176,459 Frontier Winton Fund (75,099 ) 877,626 465,225 565,481 Frontier Heritage Fund (4,603 ) 193,000 182,048 191,996 The following table summarizes fees payable to the Managing Owner and Former Managing Owner as of December 31, 2019 and 2018. As of December 31, 2019 Incentive Management Fees Interest Service Trading Frontier Diversified Fund $ - $ - $ - $ 3,391 $ 35,877 Frontier Masters Fund - - - 204 11,673 Frontier Long/Short Commodity Fund - - - - 3,468 Frontier Balanced Fund - 8,795 105 41,635 70,179 Frontier Select Fund - - - 6,906 6,000 Frontier Global Fund (Formerly Frontier Winton Fund) - - 56 11,263 22,540 Frontier Heritage Fund - - 166 5,362 11,170 As of December 31, 2018 Incentive Management Interest Service Trading Frontier Diversified Fund 10,897 3,875 - 4,498 44,827 Frontier Masters Fund - 8,347 - 1,750 27,984 Frontier Long/Short Commodity Fund - - - 51 5,306 Frontier Balanced Fund - 13,917 1,490 56,791 101,770 Frontier Select Fund - - - 8,575 7,812 Frontier Winton Fund - 42,705 8,124 17,803 24,353 Frontier Heritage Fund - 9,201 1,238 6,684 10,189 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. The following table outlines the interest paid by each Series to the Managing Owner and Former Managing Owner and its ratio to average net assets for the years ended December 31, 2019, 2018 and 2017: 2019 2018 2017 2019 2018 2017 Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Ratio to Average Net Assets Ratio to Average Net Assets Ratio to Average Net Assets Frontier Diversified Fund Class 1 $ - $ - $ (3,860 ) 0.00 % 0.00 % -0.12 % Frontier Diversified Fund Class 2 - - (19,555 ) 0.00 % 0.00 % -0.18 % Frontier Diversified Fund Class 3 - - (7,071 ) 0.00 % 0.00 % -0.07 % Frontier Masters Fund Class 1 - - (4,988 ) 0.00 % 0.00 % -0.16 % Frontier Masters Fund Class 2 - - (5,113 ) 0.00 % 0.00 % -0.14 % Frontier Masters Fund Class 3 - - (5,881 ) 0.00 % 0.00 % -0.10 % Frontier Long/Short Commodity Fund Class 2 14 141 211 0.02 % 0.00 % 0.07 % Frontier Long/Short Commodity Fund Class 3 337 1,902 1,942 0.02 % 0.39 % 0.07 % Frontier Long/Short Commodity Fund Class 1a - - 533 0.00 % 0.00 % 0.24 % Frontier Long/Short Commodity Fund Class 2a - - 233 0.00 % 0.00 % 0.05 % Frontier Long/Short Commodity Fund Class 3a - - 189 0.00 % 0.00 % 0.02 % Frontier Balanced Fund Class 1 3,925 47,797 204,989 0.02 % 0.16 % 0.49 % Frontier Balanced Fund Class 1AP 64 (1,082 ) 2,627 0.02 % -0.21 % 0.45 % Frontier Balanced Fund Class 2 764 8,556 55,580 0.02 % 0.16 % 0.69 % Frontier Balanced Fund Class 2a 10 (237 ) 516 0.00 % -0.06 % 0.10 % Frontier Balanced Fund Class 3a 32 (520 ) 1,314 0.00 % -0.05 % 0.09 % Frontier Select Fund Class 1 5,563 8,986 31,053 0.16 % 0.10 % 0.58 % Frontier Select Fund Class 1AP 15 39 94 0.19 % 0.13 % 1.68 % Frontier Select Fund Class 2 174 919 4,681 0.16 % 0.11 % 0.55 % Frontier Winton Fund Class 1 23,787 122,387 76,277 0.40 % 3.30 % 0.59 % Frontier Winton Fund Class 1AP 114 623 149 0.33 % 0.01 % 0.43 % Frontier Winton Fund Class 2 1,386 10,552 41,050 0.35 % 0.17 % 0.42 % Frontier Heritage Fund Class 1 5,323 18,510 40,215 0.19 % 0.70 % 0.67 % Frontier Heritage Fund Class 1AP 9 13 36 0.15 % 0.00 % 0.16 % Frontier Heritage Fund Class 2 1,088 2,948 10,965 0.18 % 0.10 % 1.28 % Total $ 42,605 $ 221,534 $ 426,185 Related Parties— During 2017, Frontier Diversified Fund and Frontier Masters Fund borrowed from the pooled cash management account to fund a portion of its investments in Galaxy Plus entities. As of December 31, 2018, and 2019, there were no borrowings. Frontier Diversified Fund and Frontier Masters Fund were charged an annual interest rate of 0.25% on this borrowing in 2017. The Series' administrator is Gemini Hedge Fund Services, LLC. Gemini Hedge Fund Services, LLC is an affiliate of the Sponsor. The Series' transfer agency provider is Gemini Fund Services, LLC. Gemini Fund Services, LLC is an affiliate of the Sponsor.
Frontier Funds [Member]
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— Service Fees— As of December 31, 2019, the Trust had a payable to the Managing Owner in the amounts of $0, $8,795, $327, $160,907 and $68,762 for incentive fees, management fees, interest, trading fees, and service fees, respectively. As of December 31, 2018, the Trust had a payable to the Managing Owner in the amounts of $10,897, $78,045, $10,852, $222,241, and $96,152 for incentive fees, management fees, interest, trading fees, and service fees, respectively. As of December 31, 2017, the Trust had a payable to the Managing Owner in the amounts of $53,036, $90,972, $26,007, $334,485, and $148,445 for incentive fees, management fees, interest, trading fees, and service fees, respectively. For the year ended December 31, 2019, the Managing Owner earned $0, $78,678, $1,028,325 and $2,216,815 for incentive fees, management fees, service fees, and trading fees, respectively. For the year ended December 31, 2018, the Managing Owner earned $137,543, $838,497, $1,604,307 and $3,040,016 for incentive fees, management fees, service fees, and trading fees, respectively. For the year ended December 31, 2017, the Managing Owner earned ($147,256), $1,516,571, $2,513,028 and $5,247,342 for incentive fees, management 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. For the years ended December 31, 2019, 2018 and 2017 amounts received or receivable from the Managing Owner for the difference in monthly service fees from the prepaid initial service fees were $0, $0 and $31,887, respectively. 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 (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' administrator is Gemini Hedge Fund Services, LLC. Gemini Hedge Fund Services, LLC is an affiliate of the Sponsor. The Series' transfer agency provider is Gemini Fund Services, LLC. Gemini Fund Services, LLC is an affiliate of the Sponsor.

Financial Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Financial Highlights	7. Financial Highlights The following information presents the financial highlights of the Series for the years ended December 31, 2019, 2018 and 2017. This data has been derived from the information presented in the financial statements. For the year ended December 31, 2019 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, 2018 $ 102.25 $ 120.84 $ 112.62 $ 91.10 $ 107.68 $ 100.77 $ 56.80 $ 98.82 $ 66.52 $ 103.66 $ 69.83 Net operating results: Interest income 0.15 0.17 0.16 0.11 0.13 0.12 0.05 0.10 0.06 0.10 0.06 Expenses (6.83 ) (4.47 ) (4.17 ) (7.39 ) (6.11 ) (5.75 ) (3.24 ) (2.57 ) (1.62 ) (2.70 ) (1.70 ) Net gain/(loss) on investments, net of non-controlling interests 5.54 5.03 4.99 (11.54 ) (14.52 ) (13.36 ) (9.41 ) (14.74 ) (12.41 ) (15.41 ) (12.88 ) Net income/(loss) (1.15 ) 0.74 0.98 (18.82 ) (20.49 ) (18.98 ) (12.60 ) (17.22 ) (13.97 ) (18.02 ) (14.51 ) 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 Ratios to average net assets Net investment income/(loss) -6.58 % -3.55 % -3.55 % -8.52 % -5.91 % -5.91 % -6.45 % -2.67 % -2.67 % -2.67 % -2.67 % Expenses before incentive fees (3)(4) 6.73 % 3.70 % 3.70 % 8.65 % 6.04 % 6.04 % 6.55 % 2.77 % 2.77 % 2.77 % 2.77 % Expenses after incentive fees (3)(4) 6.73 % 3.70 % 3.70 % 8.65 % 6.04 % 6.04 % 6.55 % 2.77 % 2.77 % 2.77 % 2.77 % Total return before incentive fees (2) -1.12 % 0.61 % 0.87 % -20.66 % -19.03 % -18.84 % -22.19 % -17.43 % -21.00 % -17.38 % -20.79 % Total return after incentive fees (2) -1.12 % 0.61 % 0.87 % -20.66 % -19.03 % -18.84 % -22.19 % -17.43 % -21.00 % -17.38 % -20.79 % 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, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Net operating results: Interest income 0.21 0.24 0.33 0.28 0.28 (0.00 ) 0.00 (0.00 ) Expenses (8.01 ) (5.25 ) (7.08 ) (6.12 ) (6.12 ) (3.93 ) (2.09 ) (2.69 ) Net gain/(loss) on investments, net of non-controlling interests 7.40 8.66 11.63 10.08 10.08 (0.93 ) (1.88 ) (1.55 ) Net income/(loss) (0.40 ) 3.65 4.88 4.23 4.24 (4.86 ) (3.97 ) (4.24 ) Net asset value, December 31, 2019 $ 117.23 $ 137.81 $ 185.82 $ 161.04 $ 160.50 $ 66.56 $ 78.51 $ 103.94 Ratios to average net assets Net investment income/(loss) -6.73 % -3.73 % -3.73 % -3.73 % -3.73 % -5.42 % -2.42 % -2.42 % Expenses before incentive fees (3)(4) 6.91 % 3.91 % 3.91 % 3.91 % 3.91 % 5.42 % 2.42 % 2.42 % Expenses after incentive fees (3)(4) 6.91 % 3.91 % 3.91 % 3.91 % 3.91 % 5.42 % 2.42 % 2.42 % Total return before incentive fees (2) -0.34 % 2.72 % 2.70 % 2.70 % 2.71 % -6.80 % -4.81 % -3.92 % Total return after incentive fees (2) -0.34 % 2.72 % 2.70 % 2.70 % 2.71 % -6.80 % -4.81 % -3.92 % Frontier Global Fund (Formerly Frontier Winton 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, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Net operating results: Interest income (0.00 ) (0.00 ) (0.00 ) (0.00 ) 0.00 (0.00 ) Expenses (11.16 ) (8.15 ) (10.11 ) (6.90 ) (4.6 2) (5.93 ) Net gain/(loss) on investments, net of non-controlling interests 11.11 12.66 15.76 4.61 7.00 7.00 Net income/(loss) (0.05 ) 4.51 5.65 (2.29 ) 2.37 1.06 Net asset value, December 31, 2019 $ 131.52 $ 154.43 $ 192.82 $ 97.54 $ 114.15 $ 153.59 Ratios to average net assets Net investment income/(loss) -7.99 % -4.99 % -4.99 % -6.71 % -3.70 % -3.70 % Expenses before incentive fees (3)(4) 7.99 % 4.99 % 4.99 % 6.71 % 3.70 % 3.70 % Expenses after incentive fees (3)(4) 7.99 % 4.99 % 4.99 % 6.71 % 3.70 % 3.70 % Total return before incentive fees (2) -0.04 % 3.01 % 3.02 % -2.30 % 2.12 % 0.70 % Total return after incentive fees (2) -0.04 % 3.01 % 3.02 % -2.30 % 2.12 % 0.70 % (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. For the year ended December 31, 2018 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, 2017 $ 116.41 $ 135.19 $ 125.68 $ 114.74 $ 133.27 $ 124.40 $ 81.35 $ 115.81 $ 93.59 $ 121.50 $ 97.99 Net operating results: Interest income 0.21 0.24 0.23 0.30 0.35 0.33 0.28 0.41 0.31 0.42 0.33 Expenses (7.04 ) (4.43 ) (4.13 ) (9.05 ) (8.14 ) (7.55 ) (4.71 ) (2.61 ) (2.01 ) (2.71 ) (2.12 ) Net gain/(loss) on investments, net of non-controlling interests (7.33 ) (10.16 ) (9.16 ) (14.88 ) (17.80 ) (16.41 ) (20.12 ) (14.79 ) (25.38 ) (15.56 ) (26.37 ) Net income/(loss) (14.16 ) (14.35 ) (13.06 ) (23.64 ) (25.59 ) (23.63 ) (24.55 ) (16.99 ) (27.07 ) (17.84 ) (28.16 ) Net asset value, December 31, 2018 $ 102.25 $ 120.84 $ 112.62 $ 91.10 $ 107.68 $ 100.77 $ 56.80 $ 98.82 $ 66.52 $ 103.66 $ 69.83 Ratios to average net assets Net investment income/(loss) -8.66 % -4.56 % -4.56 % -12.07 % -9.10 % -9.10 % -7.95 % -2.73 % -2.73 % -2.73 % -2.74 % Expenses before incentive fees (3)(4) 8.95 % 4.85 % 4.85 % 12.47 % 9.51 % 9.51 % 8.56 % 3.34 % 3.34 % 3.34 % 3.38 % Expenses after incentive fees (3)(4) 8.92 % 4.82 % 4.82 % 12.47 % 9.51 % 9.51 % 8.45 % 3.23 % 3.23 % 3.23 % 3.24 % Total return before incentive fees (2) -12.19 % -10.64 % -10.42 % -20.60 % -19.20 % -19.00 % -30.29 % -14.78 % -29.04 % -14.80 % -28.88 % Total return after incentive fees (2) -12.16 % -10.61 % -10.39 % -20.60 % -19.20 % -19.00 % -30.18 % -14.67 % -28.92 % -14.68 % -28.74 % 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, 2017 $ 135.96 $ 150.56 $ 202.90 $ 175.77 $ 175.18 $ 90.27 $ 100.02 $ 132.73 Net operating results: Interest income 0.12 0.14 0.19 0.16 0.16 0.00 0.00 0.00 Expenses (8.93 ) (5.90 ) (7.95 ) (6.89 ) (6.87 ) (4.19 ) (2.15 ) (2.94 ) Net gain/(loss) on investments, net of non-controlling interests (9.52 ) (10.64 ) (14.20 ) (12.23 ) (12.21 ) (14.67 ) (15.39 ) (21.61 ) Net income/(loss) (18.33 ) (16.40 ) (21.96 ) (18.96 ) (18.92 ) (18.86 ) (17.54 ) (24.55 ) Net asset value, December 31, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Ratios to average net assets Net investment income/(loss) -9.49 % -5.48 % -5.48 % -5.48 % -5.48 % -7.38 % -3.37 % -3.37 % Expenses before incentive fees (3)(4) 9.24 % 5.23 % 5.23 % 5.23 % 5.23 % 7.38 % 3.37 % 3.37 % Expenses after incentive fees (3)(4) 9.62 % 5.62 % 5.62 % 5.62 % 5.62 % 7.38 % 3.37 % 3.37 % Total return before incentive fees (2) -13.10 % -10.51 % -10.44 % -10.41 % -10.42 % -20.89 % -17.54 % -18.50 % Total return after incentive fees (2) -13.48 % -10.89 % -10.82 % -10.79 % -10.80 % -20.89 % -17.54 % -18.50 % Frontier Winton 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, 2017 $ 159.08 $ 176.44 $ 216.50 $ 121.19 $ 134.28 $ 179.70 Net operating results: Interest income 0.00 0.00 0.01 0.00 0.00 0.00 Expenses (14.29 ) (11.05 ) (14.12 ) (10.86 ) (8.95 ) (11.58 ) Net gain/(loss) on investments, net of non-controlling interests (13.22 ) (15.47 ) (15.21 ) (10.50 ) (13.55 ) (15.59 ) Net income/(loss) (27.51 ) (26.52 ) (29.33 ) (21.36 ) (22.50 ) (27.17 ) Net asset value, December 31, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Ratios to average net assets Net investment income/(loss) -13.50 % -9.49 % -9.49 % -11.85 % -7.84 % -7.84 % Expenses before incentive fees (3)(4) 13.50 % 9.49 % 9.49 % 11.84 % 7.83 % 7.83 % Expenses after incentive fees (3)(4) 13.50 % 9.49 % 9.49 % 11.85 % 7.84 % 7.84 % Total return before incentive fees (2) -17.29 % -15.03 % -13.55 % -17.61 % -16.74 % -15.11 % Total return after incentive fees (2) -17.29 % -15.03 % -13.55 % -17.63 % -16.76 % -15.12 % (5) 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. (6) 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. (7) 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. (8) 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. For the year ended December 31, 2017 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, 2016 $ 116.43 $ 132.94 $ 123.27 $ 112.80 $ 128.78 $ 119.89 $ 92.78 $ 129.56 $ 105.67 $ 130.80 $ 107.50 Net operating results: Interest income 0.29 0.34 0.31 0.61 0.70 0.65 0.01 0.00 (0.01 ) 0.00 0.00 Expenses (8.27 ) (4.76 ) (4.39 ) (9.05 ) (7.54 ) (6.99 ) (4.71 ) (3.55 ) (2.89 ) (3.61 ) (2.94 ) Net gain/(loss) on investments, net of non-controlling interests 7.96 6.67 6.49 10.38 11.33 10.85 (6.73 ) (10.20 ) (9.18 ) (5.69 ) (6.57 ) Net income/(loss) (0.02 ) 2.25 2.41 1.94 4.49 4.51 (11.43 ) (13.75 ) (12.08 ) (9.30 ) (9.51 ) Net asset value, December 31, 2017 $ 116.41 $ 135.19 $ 125.68 $ 114.74 $ 133.27 $ 124.40 $ 81.35 $ 115.81 $ 93.59 $ 121.50 $ 97.99 Ratios to average net assets Net investment income/(loss) -9.18 % -4.41 % -4.41 % -10.21 % -7.19 % -7.19 % -7.09 % -4.08 % -4.08 % -4.08 % -4.16 % Expenses before incentive fees (3)(4) 9.65 % 4.88 % 4.88 % 10.95 % 7.93 % 7.93 % 7.99 % 4.98 % 4.98 % 4.98 % 5.31 % Expenses after incentive fees (3)(4) 9.52 % 4.75 % 4.75 % 10.95 % 7.93 % 7.93 % 7.09 % 4.08 % 4.08 % 4.08 % 4.16 % Total return before incentive fees (2) -0.15 % 1.56 % 1.82 % 1.72 % 3.49 % 3.76 % -13.23 % -11.52 % -12.34 % -8.02 % -10.00 % Total return after incentive fees (2) -0.02 % 1.69 % 1.96 % 1.72 % 3.49 % 3.76 % -12.32 % -10.61 % -11.43 % -7.11 % -8.85 % 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, 2016 $ 134.80 $ 144.97 $ 194.99 $ 169.05 $ 168.49 $ 94.06 $ 101.16 $ 134.25 Net operating results: Interest income 0.05 0.05 0.07 0.06 0.06 0.00 0.00 0.00 Expenses (8.66 ) (5.04 ) (6.80 ) (5.90 ) (5.87 ) (5.33 ) (2.99 ) (3.98 ) Net gain/(loss) on investments, net of non-controlling interests 9.77 10.58 14.64 12.56 12.50 1.54 1.85 2.46 Net income/(loss) 1.16 5.59 7.91 6.72 6.69 (3.79 ) (1.14 ) (1.52 ) Net asset value, December 31, 2017 $ 135.96 $ 150.56 $ 202.90 $ 175.77 $ 175.18 $ 90.27 $ 100.02 $ 132.73 Ratios to average net assets Net investment income/(loss) -8.50 % -4.51 % -4.51 % -4.51 % -4.51 % -8.23 % -4.24 % -4.24 % Expenses before incentive fees (3)(4) 8.48 % 4.49 % 4.49 % 4.49 % 4.49 % 8.23 % 4.24 % 4.24 % Expenses after incentive fees (3)(4) 8.54 % 4.56 % 4.56 % 4.56 % 4.56 % 8.23 % 4.24 % 4.24 % Total return before incentive fees (2) 0.92 % 3.92 % 4.12 % 4.04 % 4.03 % -4.03 % -1.13 % -1.13 % Total return after incentive fees (2) 0.86 % 3.86 % 4.06 % 3.98 % 3.97 % -4.03 % -1.13 % -1.13 % Frontier Winton 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, 2016 $ 154.51 $ 166.17 $ 210.98 $ 119.58 $ 128.60 $ 172.10 Net operating results: Interest income 0.32 0.35 0.44 0.00 0.00 0.00 Expenses (13.04 ) (9.32 ) (11.79 ) (9.12 ) (6.22 ) (8.35 ) Net gain/(loss) on investments, net of non-controlling interests 17.29 19.24 16.87 10.73 11.90 15.95 Net income/(loss) 4.57 10.27 5.52 1.61 5.68 7.60 Net asset value, December 31, 2017 $ 159.08 $ 176.44 $ 216.50 $ 121.19 $ 134.28 $ 179.70 Ratios to average net assets Net investment income/(loss) -11.41 % -7.42 % -7.42 % -10.67 % -6.68 % -6.68 % Expenses before incentive fees (3)(4) 11.98 % 8.00 % 8.00 % 10.73 % 6.74 % 6.74 % Expenses after incentive fees (3)(4) 11.69 % 7.71 % 7.71 % 10.67 % 6.68 % 6.68 % Total return before incentive fees (2) 2.67 % 5.89 % 2.33 % 1.29 % 4.36 % 4.36 % Total return after incentive fees (2) 2.96 % 6.18 % 2.62 % 1.35 % 4.42 % 4.42 % (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.
Frontier Funds [Member]
Financial Highlights	7. Financial Highlights The following information presents the financial highlights of the Trust for the years ended December 31, 2019, 2018 and 2017. This data has been derived from the information presented in the consolidated financial statements. 2019 2018 2017 2016 Ratios to average net assets (1) Net investment gain/(loss) (1) -5.54 % -6.27 % -5.50 % -6.70 % Expenses before incentive fees (3) (4) -5.71 % -6.37 % 4.48 % 4.90 % Expenses after incentive fees (3) (4) -5.71 % -6.52 % 5.75 % 7.10 % Total return before incentive fees (2) -1.89 % -16.86 % 3.62 % 0.60 % Total return after incentive fees (2) -1.89 % -17.01 % 2.35 % -1.60 % (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	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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 The following tables summarize the monthly averages of futures contracts bought and sold for each respective Series of the Trust: For the Year Ended December 31, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 1,209 1,409 For the Year Ended December 31, 2018 Monthly average contracts: Bought Sold Frontier Balanced Fund 2,183 1,971 For the Year Ended December 31, 2017 Monthly average contracts: Bought Sold Frontier Balanced Fund 1,070 1,008 Frontier Select Fund 4,019 4,191 Frontier Winton Fund 1,998 1,980 Type of contract Frontier Balanced Fund Agriculturals $ 230,294 Currencies (104,139 ) Energies 124,324 Interest rates (43,735 ) Metals (71,367 ) Stock indices 151 Realized trading income/(loss) (1) $ 135,528 Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Frontier Balanced Fund Agriculturals $ (20,839 ) Currencies (374,202 ) Energies 74,850 Interest rates (62,765 ) Metals 11,010 Stock indices (4,991 ) Realized trading income/(loss) (1) $ (376,937 ) Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Frontier Balanced Fund Frontier Frontier Winton Metals $ (134,275 ) $ (143,520 ) $ (1,595,961 ) Currencies 131,422 (290,393 ) (1,676,434 ) Energies 108,921 (485,509 ) (1,185,513 ) Agriculturals (551,945 ) 162,919 727,130 Interest rates (381,197 ) (894,051 ) (1,522,362 ) Stock indices 445,257 1,502,370 9,683,416 Realized trading income/(loss) (1) $ (381,817 ) $ (148,184 ) $ 4,430,276 (1) Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options. Type of contract Frontier Balanced Fund Agriculturals $ (37,494 ) Currencies (127,586 ) Energies 9,624 Interest rates (4,922 ) Metals 26,498 Stock indices - Change in unrealized trading income/(loss) (1) $ (133,880 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Frontier Balanced Fund Agriculturals $ (16,846 ) Currencies (124,436 ) Energies (73,724 ) Interest rates 207,810 Metals 14,424 Stock indices 7,107 Change in unrealized trading income/(loss) (1) $ 14,335 Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Frontier Balanced Fund Frontier Frontier Metals $ (115,993 ) $ (57,373 ) $ 20,454 Currencies 85,174 (151,187 ) (565,953 ) Energies 78,514 (176,868 ) 124,997 Agriculturals (59,986 ) (26,685 ) 6,743 Interest rates (50,861 ) (214,247 ) (110,137 ) Stock indices 6,424 (59,662 ) (398,394 ) Change in unrealized trading income/(loss) (1) $ (56,728 ) $ (686,022 ) $ (922,290 ) (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 FCM's 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 December 31, 2019 and 2018. As of December 31, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 154,778 $ (38,594 ) $ 116,184 Swap Contracts 11,944,753 - $ 11,944,753 Frontier Diversified Fund Swap Contracts $ 6,384,583 $ - $ 6,384,583 Frontier Long/Short Commodity Fund Swap Contracts $ 362,521 $ - $ 362,521 Frontier Heritage Fund Swap Contracts $ 2,888,009 $ - $ 2,888,009 As of December 31, 2018 Gross Amounts of Gross Amounts offset in the Statements of Net Amounts Presented Frontier Balanced Fund Open Trade Equity/(Deficit) $ 348,879 $ (128,220 ) $ 220,659 Swap Contracts 10,794,908 - $ 10,794,908 Frontier Diversified Fund Swap Contracts $ 5,920,414 $ - $ 5,920,414 Frontier Long/Short Commodity Fund Swap Contracts $ 479,102 $ - $ 479,102 Frontier Heritage Fund Swap Contracts $ 2,955,444 $ - $ 2,955,444
Frontier Funds [Member]
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 December 31, 2019 and 2018 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 years ended December 31, 2019, 2018 and 2017, the monthly average of futures, forwards and options contracts bought was approximately 1,321, 2,684, and 7,078, respectively and sold was approximately 1,515, 2,482, and 7,179, respectively. The following tables summarize the trading revenues for the years ended December 31, 2019, 2018 and 2017 by contract type: Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2019 Type of contract Agriculturals $ 215,822 Currencies (553,764 ) Energies (430,890 ) Interest rates 273,302 Metals (691,581 ) Stock indices (34,113 ) Realized trading income/(loss) (1) $ (1,221,224 ) Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Agriculturals $ 147,573 Currencies (1,078,570 ) Energies 1,399,946 Interest rates 54,450 Metals 752,938 Stock indices (594,823 ) Realized trading income/(loss) (1) $ 681,514 Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Metals $ (1,881,246 ) Currencies (1,881,971 ) Energies (1,506,874 ) Agriculturals 308,770 Interest rates (2,849,356 ) Stock indices 11,602,528 Realized trading income/(loss) (1) $ 3,791,851 (1) Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options. Type of contract Agriculturals $ (92,782 ) Currencies 100,545 Energies 221,904 Interest rates (231,584 ) Metals 516,390 Stock indices 54,311 Change in unrealized trading income/(loss) (1) $ 568,784 Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Metals $ (83,504 ) Currencies (682,646 ) Energies (642,839 ) Agriculturals 494,997 Interest rates (1,035,591 ) Stock indices (195,081 ) Change in unrealized trading income/(loss) (1) $ (2,144,664 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Metals $ 556,638 Currencies (280,451 ) Energies 328,180 Agriculturals (213,814 ) Interest rates (524,406 ) Stock indices (221,354 ) Change in unrealized trading income/(loss) (1) $ (355,207 ) (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 FCM's 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 December 31, 2019 and 2018: As of December 31, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Open Trade Equity/(Deficit) $ 154,778 $ (38,594 ) $ 116,184 Swap Contracts 21,579,866 - 21,579,866 As of December 31, 2018 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Open Trade Equity/(Deficit) $ 3,244,057 $ (3,642,246 ) $ (398,189 ) Swap Contracts 20,149,868 - 20,149,868

Trading Activities and Related

Trading Activities and Related Risks	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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 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 in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company are unable to offset such futures interests positions, such Trading Company 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. 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	8. 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	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Indemnifications and Guarantees/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/Indemnifications and Guarantees noted in Management Discussion and Analysis	9. 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 Morgan Stanley & Co. LLC. 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	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Subsequent Events	11. Subsequent Events Effective February 1, 2020, the administrator and transfer agency provider of the Series was changed from Gemini Hedge Fund Services, LLC to Sudrania Fund Services Corp. Sudrania Fund Services Corp (the "Administrator") serves as the administrator and registrar and transfer agent to the Series and performs certain administrative and accounting services for the Series. The Administrator is paid customary fees for the services that it provides to the Series. Gemini Alternative Funds, LLC, an affiliate of Gemini Hedge Fund Services, LLC continues to sponsor and operate each Master Fund.
Frontier Funds [Member]
Subsequent Events	10. Subsequent Events Effective February 1, 2020, the administrator and transfer agency provider of the Series was changed from Gemini Hedge Fund Services, LLC to Sudrania Fund Services Corp. Sudrania Fund Services Corp (the "Administrator") serves as the administrator and registrar and transfer agent to the Series and performs certain administrative and accounting services for the Series. The Administrator is paid customary fees for the services that it provides to the Series. Gemini Alternative Funds, LLC, an affiliate of Gemini Hedge Fund Services, LLC continues to sponsor and operate each Master Fund.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Series ownership percentage in Galaxy Plus. 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. As of December 31, 2019, and 2018, the consolidated statements of financial condition of Frontier Balanced Fund included the assets and liabilities of its wholly owned interests in Frontier Trading Company I, LLC and Frontier Trading Company XXXIV, LLC. For the year ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Balanced Fund included the earnings of its wholly owned interest in Frontier Trading Company I, LLC and Frontier Trading Company XXXIV, LLC. As of December 31, 2019, and 2018, the consolidated statements of financial condition of Frontier Long/Short Commodity Fund included the assets and liabilities of its wholly owned Trading Company, Frontier Trading Company XXXVII, LLC. For the years ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Long/Short Commodity Fund included the earnings of its wholly owned Trading Company listed above. As of December 31, 2019, and 2018, the consolidated statements of financial condition of Frontier Diversified Fund included the assets and liabilities of its wholly owned Frontier Trading Company XXXV, LLC. For the years ended December 31, 2019, 2018, and 2017 the consolidated statements of operations of Frontier Diversified Fund included the earnings of its wholly owned Trading Company listed above. As of and for the years ended December 31, 2019, 2018, and 2017, the consolidated statements of financial condition and statement of operations of Frontier Heritage Fund included the assets and liabilities, and earnings, respectively, of its majority owned Trading Company, Frontier Trading Company XXXIX, LLC. For the year ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Select Fund included the earnings of its majority owned Trading Company, Frontier Trading Company XV, LLC through the period that Trading Company XV, LLC ceased operation on May 9, 2017. For the year ended December 31, 2016, the consolidated statement of operations of Frontier Select Fund included the earnings of its majority owned Trading Company listed above. For the year ended December 31, 2019 and 2018, the consolidated statements of operations of Frontier Global Fund include the earnings of its majority owned Trading Company, Frontier Trading Company II, LLC from January 1, 2017 through December 14, 2017. As of and for the years ended December 31, 2019, 2018 and 2017, Frontier Master Fund did not have a majority interest in any Trading Company. Each of the Series has invested in Frontier Trading Company XXXVIII, LLC on the same basis as its ownership in the cash pool. Frontier Trading Company XXXVIII, LLC's assets, liabilities and earnings are allocated to all of the Series of the Trust based on their proportionate share of the cash pool. Each Series investment in the Frontier Trading Company XXXVIII, LLC is listed under Investments in unconsolidated trading companies, at fair value on the Statements of Financial Condition.
Change in Consolidation Method	Change in Consolidation Method
Use of Estimates	Use of Estimates—
Cash and Cash Equivalents	Cash and Cash Equivalents—
Interest Income	Interest Income—U.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. Treasuries 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 2016 through 2019 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 2017, 2018 and 2019, 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 2020 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 $22,531, $220, $31,541, $319,698, $16,895, $150,025 and $57,132 for the Frontier Diversified, Long/Short Commodity, Masters, Balanced, Select, Global and Heritage Funds, respectively, as of December 31, 2019. 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 Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements—
Subsequent Events	Subsequent Events—The Series, follows the provisions of ASC 855, Subsequent Events
Frontier Funds [Member]
Basis of Presentation	Basis of Presentation—The Trust follows U.S. Generally Accepted Accounting Principles ("GAAP"), as established by the Financial Accounting Standards Board (the "FASB"), to ensure consistent reporting of financial condition, condensed schedules of investments, results of operations, changes in capital and cash flows. The Trust is an investment company following accounting and reporting guidance in Accounting Standards Codification ("ASC") 946.
Consolidation	Consolidation Galaxy Plus entities are co-mingled investment vehicles. In addition to the Trust, there are other non-affiliated investors in Galaxy Plus. Subscriptions and redemptions by these non-affiliated investors will have a direct impact on the Trust ownership percentage in Galaxy Plus. 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.
Change in Consolidation Method	Change in Consolidation Method—
Use of Estimates	Use of Estimates—
Cash and Cash Equivalents	Cash and Cash Equivalents—
Interest Income	Interest Income—U.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. Treasuries and assets held at an 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.
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 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 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 2019, 2018 and 2017, 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 2020 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 $598,042 as of December 31, 2019. 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 Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements—
Subsequent Events	Subsequent Events Subsequent Events

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Schedule of financial asset portfolio measured at fair value	December 31, 2019 Level 1 Level 2 Level 3 Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 24,150 $ - $ - $ 24,150 Swap Contracts - - 6,384,583 6,384,583 U.S. Treasury Securities 99,605 - - 99,605 Frontier Masters Fund Investment in Unconsolidated Trading Companies 11,005 - - 11,005 U.S. Treasury Securities 45,391 - - 45,391 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 14,711 - - 14,711 Swap Contracts - - 362,521 362,521 U.S. Treasury Securities 60,673 - - 60,673 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 50,867 - - 50,867 Open Trade Equity (Deficit) 57,057 59,127 - 116,184 Swap Contracts - - 11,944,753 11,944,753 U.S. Treasury Securities 209,799 - - 209,799 Frontier Select Fund Investment in Unconsolidated Trading Companies 26,331 - 479,024 505,355 U.S. Treasury Securities 108,603 - - 108,603 Frontier Winton Fund Investment in Unconsolidated Trading Companies 11,818 - - 11,818 U.S. Treasury Securities 48,741 - - 48,741 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 18,891 - - 18,891 Swap Contracts - - 2,888,008 2,888,008 U.S. Treasury Securities 77,916 - - 77,916 December 31, 2018 Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Frontier Diversified Fund Investment in Unconsolidated Trading Companies $ 1,157,971 $ 2,939 $ - $ 1,160,910 Swap Contracts - - 5,920,414 5,920,414 U.S. Treasury Securities 1,553,261 - - 1,553,261 Frontier Masters Fund Investment in Unconsolidated Trading Companies 772,732 2,356 - 775,088 U.S. Treasury Securities 152,384 - - 152,384 Frontier Long/Short Commodity Fund Investment in Unconsolidated Trading Companies 28,163 - - 28,163 Swap Contracts - - 479,102 479,102 U.S. Treasury Securities 202,415 - - 202,415 Frontier Balanced Fund Investment in Unconsolidated Trading Companies 1,739,609 5,390 - 1,744,999 Open Trade Equity (Deficit) 242,860 (22,201 ) - 220,659 Swap Contracts - - 10,794,908 10,794,908 U.S. Treasury Securities 123,409 - - 123,409 Frontier Select Fund Investment in Unconsolidated Trading Companies 11,462 - 511,718 523,180 U.S. Treasury Securities 82,386 - - 82,386 Frontier Winton Fund Investment in Unconsolidated Trading Companies 4,280,023 12,052 - 4,292,075 U.S. Treasury Securities 3,126,551 - - 3,126,551 Frontier Heritage Fund Investment in Unconsolidated Trading Companies 724,614 2,072 - 726,686 Swap Contracts - - 2,955,444 2,955,444 U.S. Treasury Securities 443,921 - - 443,921
Schedule of change in Level 3 assets measured at fair value on recurring basis	2019 For the Year Ended December 31, 2019 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 10,794,908 $ 479,102 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 1,149,845 (116,581 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2019 $ 11,944,753 $ 362,521 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 5,920,414 $ 2,955,444 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 464,169 (67,435 ) Proceeds from collateral reduction - - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2019 $ 6,384,583 $ 2,888,009 For the Twelve Months Ended December 31, 2019 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2019 $ 511,718 Change in fair value of investments in unconsolidated trading companies (32,694 ) 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, 2019 $ 479,024 2018 For the Year Ended December 31, 2018 Swaps Frontier Balanced Fund Frontier Long/Short Commodity Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 11,340,959 $ 397,039 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 1,453,948 82,063 Proceeds from collateral reduction (1,999,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 10,794,908 $ 479,102 Frontier Diversified Fund Frontier Heritage Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 6,376,472 $ 3,094,367 Total gains or losses (realized/unrealized): Included in earnings-realized - - Included in earnings-unrealized 643,941 (138,923 ) Proceeds from collateral reduction (1,099,999 ) - Change in ownership allocation - - Transfers in and/or out of Level 3 - - Balance of recurring Level 3 assets as of December 31, 2018 $ 5,920,414 $ 2,955,444 For the Twelve Months Ended December 31, 2018 Investments in Unconsolidated Trading Companies: Frontier Select Fund Balance of recurring Level 3 assets as of January 1, 2018 $ 579,073 Change in fair value of investments in unconsolidated trading companies (67,355 ) 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, 2018 $ 511,718
Schedule of change in unrealized appreciation (depreciation)	The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2019. Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 464,169 $ (116,581 ) $ 1,149,845 $ (67,436 ) Frontier Select Fund Investments in Unconsolidated Trading Companies $ (32,694 ) The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2018. Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ 643,941 $ 82,063 $ 1,453,948 $ (138,923 ) The total change in unrealized appreciation (depreciation) included in the statements of operations attributable to level 3 investments still held at December 31, 2017. Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Balanced Fund Frontier Heritage Fund Swap Contracts $ (47,375 ) $ 26,621 $ (84,491 ) $ (297,047 )
Frontier Funds [Member]
Schedule of financial asset portfolio measured at fair value	December 31, 2019 Level 1 Level 2 Level 3 Fair Value Open Trade Equity (Deficit) 57,056 59,128 - $ 116,184 Swap Contracts - - 21,579,865 21,579,865 U.S. Treasury Securities 650,728 - - 650,728 December 31, 2018 Level 1 Level 2 Level 3 Total Open Trade Equity (Deficit) $ (400,796 ) $ 2,607 $ - $ (398,189 ) Swap Contracts - - 20,149,868 20,149,868 U.S. Treasury Securities 5,684,327 - - 5,684,327
Schedule of change in Level 3 assets measured at fair value on recurring basis	Swaps For the Year ended Balance of recurring Level 3 assets as of January 1, 2019 20,149,868 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 1,429,997 Proceeds from collateral reduction - Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2019 21,579,865 For the Year ended Balance of recurring Level 3 assets as of January 1, 2018 $ 21,208,838 Total gains or losses (realized/unrealized): Included in earnings-realized - Included in earnings-unrealized 2,041,028 Proceeds from collateral reduction (3,099,998 ) Purchase of investments - Sale of investments - Transfers in and/or out of Level 3 - Balance of recurring Level 3 assets as of December 31, 2018 $ 20,149,868

Swap Contracts (Tables)

Swap Contracts (Tables)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Schedule of Investments in following swap	The Series have invested in the following swaps as of and for the year ended December 31, 2019: Frontier Balanced Fund Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Heritage Fund Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 11,858,754 $ 6,298,583 $ 332,571 $ 1,912,559 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,149,846 $ 464,169 $ (116,581 ) $ (67,435 ) Fair Value as of December 31, 2019 $ 11,944,754 $ 6,384,583 $ 362,521 $ 2,888,009 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Series have invested in the following swaps as of and for the year ended December 31, 2018: Frontier Balanced Fund Frontier Diversified Fund Frontier Long/Short Commodity Fund Frontier Heritage Fund Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )
Frontier Funds [Member]
Schedule of Investments in following swap	The Trust had invested in the following swaps as of and for the year ended December 31, 2019: XXXIV Balanced select swap XXXV Diversified select swap XXXVII L/S select swap Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 975,450 Swap Value $ 11,858,754 $ 6,298,583 $ 332,571 $ 1,912,559 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,149,846 $ 464,169 $ (116,581 ) $ (67,435 ) Fair Value as of December 31, 2019 $ 11,944,754 $ 6,384,583 $ 362,521 $ 2,888,009 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 ) The Trust had invested in the following swaps as of and for the year ended December 31, 2018: XXXIV Balanced select swap XXXV Diversified select swap XXXVII L/S select swap Brevan Howard Total Return Swap Total Return Swap Total Return Swap Total Return Swap Counterparty DeutscheBank AG DeutscheBank AG DeutscheBank AG DeutscheBank AG Notional Amount $ 7,420,403 $ 1,761,834 $ 653,610 $ 2,072,056 Termination Date 7/31/2023 7/31/2023 7/31/2023 3/27/2023 Cash Collateral $ 86,000 $ 86,000 $ 29,950 $ 978,950 Swap Value $ 10,708,908 $ 5,834,414 $ 449,152 $ 1,976,494 Investee Returns Total Returns Total Returns Total Returns Total Returns Realized Gain/(Loss) $ 0 $ 0 $ 0 $ 0 Change in Unrealized Gain/(Loss) $ 1,453,948 $ 643,941 $ 82,063 $ (138,924 ) Fair Value as of December 31, 2018 $ 10,794,908 $ 5,920,414 $ 479,102 $ 2,955,444 Advance on swap appreciation $ (6,176,555 ) $ (4,000,000 ) $ (115,000 ) $ (1,900,000 )

Investments in Unconsolidated_2

Investments in Unconsolidated Trading Companies and Private Investment Companies (Tables)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Schedule of investments in unconsolidated trading companies	As of December 31, 2019 As of December 31, 2018 Percentage of Fair Value Percentage of Fair Value Series Frontier Diversified Series — Frontier Trading Companies II and XXXVIII 0.20 % $ 24,150 7.19 % $ 1,160,910 Frontier Masters Series — Frontier Trading Companies II and XXXVIII 0.49 % $ 11,005 13.91 % $ 775,088 Frontier Long/Short Commodity Series — Frontier Trading Company XXXVIII 1.10 % $ 14,711 1.15 % $ 28,163 Frontier Balanced Series — Frontier Trading Companies II and XXXVIII 0.23 % $ 50,867 5.48 % $ 1,744,999 Frontier Select Series — Frontier Trading Companies XXXVIII and XXXIX 17.94 % $ 505,355 13.56 % $ 523,180 Frontier Winton Fund Frontier Trading Companies II and XXXVIII 0.25 % $ 11,818 52.30 % $ 4,292,075 Frontier Heritage Series — Frontier Trading Companies II and XXXVIII 0.57 % $ 18,891 16.27 % $ 726,686
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 - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Quantmetrics Feeder Fund (527) 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 Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Masters Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Long/Short Commodity Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Daily None Frontier Balanced Fund Multi-Strategy Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) 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 Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None Frontier Select Fund Trend Following Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Weekly None Frontier Heritage Fund Multi-Strategy Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC 24 hours Weekly None
Frontier Funds [Member]
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 - EvE STP Feeder Fund (516) LLC 24 hours Daily None Galaxy Plus Fund - LRR Feeder Fund (522) LLC 24 hours Daily None Galaxy Plus Fund - Quantmetrics Feeder Fund (527) 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 Galaxy Plus Fund - TT Feeder Fund (531) LLC 24 hours Weekly None Option Trading Galaxy Plus Fund - Doherty Feeder Fund (528) LLC 24 hours Daily None

Transactions with Affiliates (T

Transactions with Affiliates (Tables) - The Series of the Frontier Funds [Member]	12 Months Ended
	Dec. 31, 2019
Schedule of fees earned by managing owner	For the Year Ended December 31, 2019 Incentive (Rebate) Fees Management Fee Service Trading Frontier Diversified Fund $ - $ 2,668 $ 44,726 $ 493,585 Frontier Masters Fund - 7,665 11,635 213,153 Frontier Long/Short Commodity Fund - - 562 54,334 Frontier Balanced Fund - 22,377 606,359 972,678 Frontier Select Fund - - 102,692 85,589 Frontier Global Fund (Formerly Frontier Winton Fund) - 38,679 177,833 278,497 Frontier Heritage Fund - 7,289 84,518 118,979 For the Year Ended December 31, 2018 Incentive Management Service Trading Frontier Diversified Fund $ (4,499 ) $ 44,289 $ 58,473 $ 591,665 Frontier Masters Fund - 108,413 49,049 420,391 Frontier Long/Short Commodity Fund (3,789 ) - 1,653 82,890 Frontier Balanced Fund 145,134 77,495 920,570 1,378,226 Frontier Select Fund - - 132,408 117,056 Frontier Winton Fund - 487,698 318,897 307,053 Frontier Heritage Fund 697 120,602 123,257 142,735 For the Year Ended December 31, 2017 Incentive Management Service Trading Frontier Diversified Fund $ (50,661 ) $ 69,478 $ 132,465 $ 1,347,386 Frontier Masters Fund - 184,365 89,344 672,227 Frontier Long/Short Commodity Fund (144,752 ) - 13,672 234,923 Frontier Balanced Fund 40,189 107,368 1,409,337 2,058,870 Frontier Select Fund - 84,734 220,938 176,459 Frontier Winton Fund (75,099 ) 877,626 465,225 565,481 Frontier Heritage Fund (4,603 ) 193,000 182,048 191,996
Schedule of fees payable to managing owner	As of December 31, 2019 Incentive Management Fees Interest Service Trading Frontier Diversified Fund $ - $ - $ - $ 3,391 $ 35,877 Frontier Masters Fund - - - 204 11,673 Frontier Long/Short Commodity Fund - - - - 3,468 Frontier Balanced Fund - 8,795 105 41,635 70,179 Frontier Select Fund - - - 6,906 6,000 Frontier Global Fund (Formerly Frontier Winton Fund) - - 56 11,263 22,540 Frontier Heritage Fund - - 166 5,362 11,170 As of December 31, 2018 Incentive Management Interest Service Trading Frontier Diversified Fund 10,897 3,875 - 4,498 44,827 Frontier Masters Fund - 8,347 - 1,750 27,984 Frontier Long/Short Commodity Fund - - - 51 5,306 Frontier Balanced Fund - 13,917 1,490 56,791 101,770 Frontier Select Fund - - - 8,575 7,812 Frontier Winton Fund - 42,705 8,124 17,803 24,353 Frontier Heritage Fund - 9,201 1,238 6,684 10,189
Schedule of interest paid by each series to managing owner	2019 2018 2017 2019 2018 2017 Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Gross Amount Paid to the Managing Owner Ratio to Average Net Assets Ratio to Average Net Assets Ratio to Average Net Assets Frontier Diversified Fund Class 1 $ - $ - $ (3,860 ) 0.00 % 0.00 % -0.12 % Frontier Diversified Fund Class 2 - - (19,555 ) 0.00 % 0.00 % -0.18 % Frontier Diversified Fund Class 3 - - (7,071 ) 0.00 % 0.00 % -0.07 % Frontier Masters Fund Class 1 - - (4,988 ) 0.00 % 0.00 % -0.16 % Frontier Masters Fund Class 2 - - (5,113 ) 0.00 % 0.00 % -0.14 % Frontier Masters Fund Class 3 - - (5,881 ) 0.00 % 0.00 % -0.10 % Frontier Long/Short Commodity Fund Class 2 14 141 211 0.02 % 0.00 % 0.07 % Frontier Long/Short Commodity Fund Class 3 337 1,902 1,942 0.02 % 0.39 % 0.07 % Frontier Long/Short Commodity Fund Class 1a - - 533 0.00 % 0.00 % 0.24 % Frontier Long/Short Commodity Fund Class 2a - - 233 0.00 % 0.00 % 0.05 % Frontier Long/Short Commodity Fund Class 3a - - 189 0.00 % 0.00 % 0.02 % Frontier Balanced Fund Class 1 3,925 47,797 204,989 0.02 % 0.16 % 0.49 % Frontier Balanced Fund Class 1AP 64 (1,082 ) 2,627 0.02 % -0.21 % 0.45 % Frontier Balanced Fund Class 2 764 8,556 55,580 0.02 % 0.16 % 0.69 % Frontier Balanced Fund Class 2a 10 (237 ) 516 0.00 % -0.06 % 0.10 % Frontier Balanced Fund Class 3a 32 (520 ) 1,314 0.00 % -0.05 % 0.09 % Frontier Select Fund Class 1 5,563 8,986 31,053 0.16 % 0.10 % 0.58 % Frontier Select Fund Class 1AP 15 39 94 0.19 % 0.13 % 1.68 % Frontier Select Fund Class 2 174 919 4,681 0.16 % 0.11 % 0.55 % Frontier Winton Fund Class 1 23,787 122,387 76,277 0.40 % 3.30 % 0.59 % Frontier Winton Fund Class 1AP 114 623 149 0.33 % 0.01 % 0.43 % Frontier Winton Fund Class 2 1,386 10,552 41,050 0.35 % 0.17 % 0.42 % Frontier Heritage Fund Class 1 5,323 18,510 40,215 0.19 % 0.70 % 0.67 % Frontier Heritage Fund Class 1AP 9 13 36 0.15 % 0.00 % 0.16 % Frontier Heritage Fund Class 2 1,088 2,948 10,965 0.18 % 0.10 % 1.28 % Total $ 42,605 $ 221,534 $ 426,185

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
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 1a Class 2 Class 2a Class 3 Class 3a Per unit operating performance (1) Net asset value, December 31, 2018 $ 102.25 $ 120.84 $ 112.62 $ 91.10 $ 107.68 $ 100.77 $ 56.80 $ 98.82 $ 66.52 $ 103.66 $ 69.83 Net operating results: Interest income 0.15 0.17 0.16 0.11 0.13 0.12 0.05 0.10 0.06 0.10 0.06 Expenses (6.83 ) (4.47 ) (4.17 ) (7.39 ) (6.11 ) (5.75 ) (3.24 ) (2.57 ) (1.62 ) (2.70 ) (1.70 ) Net gain/(loss) on investments, net of non-controlling interests 5.54 5.03 4.99 (11.54 ) (14.52 ) (13.36 ) (9.41 ) (14.74 ) (12.41 ) (15.41 ) (12.88 ) Net income/(loss) (1.15 ) 0.74 0.98 (18.82 ) (20.49 ) (18.98 ) (12.60 ) (17.22 ) (13.97 ) (18.02 ) (14.51 ) 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 Ratios to average net assets Net investment income/(loss) -6.58 % -3.55 % -3.55 % -8.52 % -5.91 % -5.91 % -6.45 % -2.67 % -2.67 % -2.67 % -2.67 % Expenses before incentive fees (3)(4) 6.73 % 3.70 % 3.70 % 8.65 % 6.04 % 6.04 % 6.55 % 2.77 % 2.77 % 2.77 % 2.77 % Expenses after incentive fees (3)(4) 6.73 % 3.70 % 3.70 % 8.65 % 6.04 % 6.04 % 6.55 % 2.77 % 2.77 % 2.77 % 2.77 % Total return before incentive fees (2) -1.12 % 0.61 % 0.87 % -20.66 % -19.03 % -18.84 % -22.19 % -17.43 % -21.00 % -17.38 % -20.79 % Total return after incentive fees (2) -1.12 % 0.61 % 0.87 % -20.66 % -19.03 % -18.84 % -22.19 % -17.43 % -21.00 % -17.38 % -20.79 % 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, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Net operating results: Interest income 0.21 0.24 0.33 0.28 0.28 (0.00 ) 0.00 (0.00 ) Expenses (8.01 ) (5.25 ) (7.08 ) (6.12 ) (6.12 ) (3.93 ) (2.09 ) (2.69 ) Net gain/(loss) on investments, net of non-controlling interests 7.40 8.66 11.63 10.08 10.08 (0.93 ) (1.88 ) (1.55 ) Net income/(loss) (0.40 ) 3.65 4.88 4.23 4.24 (4.86 ) (3.97 ) (4.24 ) Net asset value, December 31, 2019 $ 117.23 $ 137.81 $ 185.82 $ 161.04 $ 160.50 $ 66.56 $ 78.51 $ 103.94 Ratios to average net assets Net investment income/(loss) -6.73 % -3.73 % -3.73 % -3.73 % -3.73 % -5.42 % -2.42 % -2.42 % Expenses before incentive fees (3)(4) 6.91 % 3.91 % 3.91 % 3.91 % 3.91 % 5.42 % 2.42 % 2.42 % Expenses after incentive fees (3)(4) 6.91 % 3.91 % 3.91 % 3.91 % 3.91 % 5.42 % 2.42 % 2.42 % Total return before incentive fees (2) -0.34 % 2.72 % 2.70 % 2.70 % 2.71 % -6.80 % -4.81 % -3.92 % Total return after incentive fees (2) -0.34 % 2.72 % 2.70 % 2.70 % 2.71 % -6.80 % -4.81 % -3.92 % Frontier Global Fund (Formerly Frontier Winton 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, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Net operating results: Interest income (0.00 ) (0.00 ) (0.00 ) (0.00 ) 0.00 (0.00 ) Expenses (11.16 ) (8.15 ) (10.11 ) (6.90 ) (4.6 2) (5.93 ) Net gain/(loss) on investments, net of non-controlling interests 11.11 12.66 15.76 4.61 7.00 7.00 Net income/(loss) (0.05 ) 4.51 5.65 (2.29 ) 2.37 1.06 Net asset value, December 31, 2019 $ 131.52 $ 154.43 $ 192.82 $ 97.54 $ 114.15 $ 153.59 Ratios to average net assets Net investment income/(loss) -7.99 % -4.99 % -4.99 % -6.71 % -3.70 % -3.70 % Expenses before incentive fees (3)(4) 7.99 % 4.99 % 4.99 % 6.71 % 3.70 % 3.70 % Expenses after incentive fees (3)(4) 7.99 % 4.99 % 4.99 % 6.71 % 3.70 % 3.70 % Total return before incentive fees (2) -0.04 % 3.01 % 3.02 % -2.30 % 2.12 % 0.70 % Total return after incentive fees (2) -0.04 % 3.01 % 3.02 % -2.30 % 2.12 % 0.70 % (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. For the year ended December 31, 2018 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, 2017 $ 116.41 $ 135.19 $ 125.68 $ 114.74 $ 133.27 $ 124.40 $ 81.35 $ 115.81 $ 93.59 $ 121.50 $ 97.99 Net operating results: Interest income 0.21 0.24 0.23 0.30 0.35 0.33 0.28 0.41 0.31 0.42 0.33 Expenses (7.04 ) (4.43 ) (4.13 ) (9.05 ) (8.14 ) (7.55 ) (4.71 ) (2.61 ) (2.01 ) (2.71 ) (2.12 ) Net gain/(loss) on investments, net of non-controlling interests (7.33 ) (10.16 ) (9.16 ) (14.88 ) (17.80 ) (16.41 ) (20.12 ) (14.79 ) (25.38 ) (15.56 ) (26.37 ) Net income/(loss) (14.16 ) (14.35 ) (13.06 ) (23.64 ) (25.59 ) (23.63 ) (24.55 ) (16.99 ) (27.07 ) (17.84 ) (28.16 ) Net asset value, December 31, 2018 $ 102.25 $ 120.84 $ 112.62 $ 91.10 $ 107.68 $ 100.77 $ 56.80 $ 98.82 $ 66.52 $ 103.66 $ 69.83 Ratios to average net assets Net investment income/(loss) -8.66 % -4.56 % -4.56 % -12.07 % -9.10 % -9.10 % -7.95 % -2.73 % -2.73 % -2.73 % -2.74 % Expenses before incentive fees (3)(4) 8.95 % 4.85 % 4.85 % 12.47 % 9.51 % 9.51 % 8.56 % 3.34 % 3.34 % 3.34 % 3.38 % Expenses after incentive fees (3)(4) 8.92 % 4.82 % 4.82 % 12.47 % 9.51 % 9.51 % 8.45 % 3.23 % 3.23 % 3.23 % 3.24 % Total return before incentive fees (2) -12.19 % -10.64 % -10.42 % -20.60 % -19.20 % -19.00 % -30.29 % -14.78 % -29.04 % -14.80 % -28.88 % Total return after incentive fees (2) -12.16 % -10.61 % -10.39 % -20.60 % -19.20 % -19.00 % -30.18 % -14.67 % -28.92 % -14.68 % -28.74 % 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, 2017 $ 135.96 $ 150.56 $ 202.90 $ 175.77 $ 175.18 $ 90.27 $ 100.02 $ 132.73 Net operating results: Interest income 0.12 0.14 0.19 0.16 0.16 0.00 0.00 0.00 Expenses (8.93 ) (5.90 ) (7.95 ) (6.89 ) (6.87 ) (4.19 ) (2.15 ) (2.94 ) Net gain/(loss) on investments, net of non-controlling interests (9.52 ) (10.64 ) (14.20 ) (12.23 ) (12.21 ) (14.67 ) (15.39 ) (21.61 ) Net income/(loss) (18.33 ) (16.40 ) (21.96 ) (18.96 ) (18.92 ) (18.86 ) (17.54 ) (24.55 ) Net asset value, December 31, 2018 $ 117.63 $ 134.16 $ 180.94 $ 156.81 $ 156.26 $ 71.41 $ 82.48 $ 108.18 Ratios to average net assets Net investment income/(loss) -9.49 % -5.48 % -5.48 % -5.48 % -5.48 % -7.38 % -3.37 % -3.37 % Expenses before incentive fees (3)(4) 9.24 % 5.23 % 5.23 % 5.23 % 5.23 % 7.38 % 3.37 % 3.37 % Expenses after incentive fees (3)(4) 9.62 % 5.62 % 5.62 % 5.62 % 5.62 % 7.38 % 3.37 % 3.37 % Total return before incentive fees (2) -13.10 % -10.51 % -10.44 % -10.41 % -10.42 % -20.89 % -17.54 % -18.50 % Total return after incentive fees (2) -13.48 % -10.89 % -10.82 % -10.79 % -10.80 % -20.89 % -17.54 % -18.50 % Frontier Winton 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, 2017 $ 159.08 $ 176.44 $ 216.50 $ 121.19 $ 134.28 $ 179.70 Net operating results: Interest income 0.00 0.00 0.01 0.00 0.00 0.00 Expenses (14.29 ) (11.05 ) (14.12 ) (10.86 ) (8.95 ) (11.58 ) Net gain/(loss) on investments, net of non-controlling interests (13.22 ) (15.47 ) (15.21 ) (10.50 ) (13.55 ) (15.59 ) Net income/(loss) (27.51 ) (26.52 ) (29.33 ) (21.36 ) (22.50 ) (27.17 ) Net asset value, December 31, 2018 $ 131.57 $ 149.92 $ 187.17 $ 99.83 $ 111.78 $ 152.53 Ratios to average net assets Net investment income/(loss) -13.50 % -9.49 % -9.49 % -11.85 % -7.84 % -7.84 % Expenses before incentive fees (3)(4) 13.50 % 9.49 % 9.49 % 11.84 % 7.83 % 7.83 % Expenses after incentive fees (3)(4) 13.50 % 9.49 % 9.49 % 11.85 % 7.84 % 7.84 % Total return before incentive fees (2) -17.29 % -15.03 % -13.55 % -17.61 % -16.74 % -15.11 % Total return after incentive fees (2) -17.29 % -15.03 % -13.55 % -17.63 % -16.76 % -15.12 % (5) 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. (6) 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. (7) 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. (8) 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. For the year ended December 31, 2017 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, 2016 $ 116.43 $ 132.94 $ 123.27 $ 112.80 $ 128.78 $ 119.89 $ 92.78 $ 129.56 $ 105.67 $ 130.80 $ 107.50 Net operating results: Interest income 0.29 0.34 0.31 0.61 0.70 0.65 0.01 0.00 (0.01 ) 0.00 0.00 Expenses (8.27 ) (4.76 ) (4.39 ) (9.05 ) (7.54 ) (6.99 ) (4.71 ) (3.55 ) (2.89 ) (3.61 ) (2.94 ) Net gain/(loss) on investments, net of non-controlling interests 7.96 6.67 6.49 10.38 11.33 10.85 (6.73 ) (10.20 ) (9.18 ) (5.69 ) (6.57 ) Net income/(loss) (0.02 ) 2.25 2.41 1.94 4.49 4.51 (11.43 ) (13.75 ) (12.08 ) (9.30 ) (9.51 ) Net asset value, December 31, 2017 $ 116.41 $ 135.19 $ 125.68 $ 114.74 $ 133.27 $ 124.40 $ 81.35 $ 115.81 $ 93.59 $ 121.50 $ 97.99 Ratios to average net assets Net investment income/(loss) -9.18 % -4.41 % -4.41 % -10.21 % -7.19 % -7.19 % -7.09 % -4.08 % -4.08 % -4.08 % -4.16 % Expenses before incentive fees (3)(4) 9.65 % 4.88 % 4.88 % 10.95 % 7.93 % 7.93 % 7.99 % 4.98 % 4.98 % 4.98 % 5.31 % Expenses after incentive fees (3)(4) 9.52 % 4.75 % 4.75 % 10.95 % 7.93 % 7.93 % 7.09 % 4.08 % 4.08 % 4.08 % 4.16 % Total return before incentive fees (2) -0.15 % 1.56 % 1.82 % 1.72 % 3.49 % 3.76 % -13.23 % -11.52 % -12.34 % -8.02 % -10.00 % Total return after incentive fees (2) -0.02 % 1.69 % 1.96 % 1.72 % 3.49 % 3.76 % -12.32 % -10.61 % -11.43 % -7.11 % -8.85 % 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, 2016 $ 134.80 $ 144.97 $ 194.99 $ 169.05 $ 168.49 $ 94.06 $ 101.16 $ 134.25 Net operating results: Interest income 0.05 0.05 0.07 0.06 0.06 0.00 0.00 0.00 Expenses (8.66 ) (5.04 ) (6.80 ) (5.90 ) (5.87 ) (5.33 ) (2.99 ) (3.98 ) Net gain/(loss) on investments, net of non-controlling interests 9.77 10.58 14.64 12.56 12.50 1.54 1.85 2.46 Net income/(loss) 1.16 5.59 7.91 6.72 6.69 (3.79 ) (1.14 ) (1.52 ) Net asset value, December 31, 2017 $ 135.96 $ 150.56 $ 202.90 $ 175.77 $ 175.18 $ 90.27 $ 100.02 $ 132.73 Ratios to average net assets Net investment income/(loss) -8.50 % -4.51 % -4.51 % -4.51 % -4.51 % -8.23 % -4.24 % -4.24 % Expenses before incentive fees (3)(4) 8.48 % 4.49 % 4.49 % 4.49 % 4.49 % 8.23 % 4.24 % 4.24 % Expenses after incentive fees (3)(4) 8.54 % 4.56 % 4.56 % 4.56 % 4.56 % 8.23 % 4.24 % 4.24 % Total return before incentive fees (2) 0.92 % 3.92 % 4.12 % 4.04 % 4.03 % -4.03 % -1.13 % -1.13 % Total return after incentive fees (2) 0.86 % 3.86 % 4.06 % 3.98 % 3.97 % -4.03 % -1.13 % -1.13 % Frontier Winton 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, 2016 $ 154.51 $ 166.17 $ 210.98 $ 119.58 $ 128.60 $ 172.10 Net operating results: Interest income 0.32 0.35 0.44 0.00 0.00 0.00 Expenses (13.04 ) (9.32 ) (11.79 ) (9.12 ) (6.22 ) (8.35 ) Net gain/(loss) on investments, net of non-controlling interests 17.29 19.24 16.87 10.73 11.90 15.95 Net income/(loss) 4.57 10.27 5.52 1.61 5.68 7.60 Net asset value, December 31, 2017 $ 159.08 $ 176.44 $ 216.50 $ 121.19 $ 134.28 $ 179.70 Ratios to average net assets Net investment income/(loss) -11.41 % -7.42 % -7.42 % -10.67 % -6.68 % -6.68 % Expenses before incentive fees (3)(4) 11.98 % 8.00 % 8.00 % 10.73 % 6.74 % 6.74 % Expenses after incentive fees (3)(4) 11.69 % 7.71 % 7.71 % 10.67 % 6.68 % 6.68 % Total return before incentive fees (2) 2.67 % 5.89 % 2.33 % 1.29 % 4.36 % 4.36 % Total return after incentive fees (2) 2.96 % 6.18 % 2.62 % 1.35 % 4.42 % 4.42 % (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.
Frontier Funds [Member]
Schedule of financial highlights of trust	2019 2018 2017 2016 Ratios to average net assets (1) Net investment gain/(loss) (1) -5.54 % -6.27 % -5.50 % -6.70 % Expenses before incentive fees (3) (4) -5.71 % -6.37 % 4.48 % 4.90 % Expenses after incentive fees (3) (4) -5.71 % -6.52 % 5.75 % 7.10 % Total return before incentive fees (2) -1.89 % -16.86 % 3.62 % 0.60 % Total return after incentive fees (2) -1.89 % -17.01 % 2.35 % -1.60 % (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.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Schedule of averages futures contracts	The following tables summarize the monthly averages of futures contracts bought and sold for each respective Series of the Trust: For the Year Ended December 31, 2019 Monthly average contracts: Bought Sold Frontier Balanced Fund 1,209 1,409 For the Year Ended December 31, 2018 Monthly average contracts: Bought Sold Frontier Balanced Fund 2,183 1,971 For the Year Ended December 31, 2017 Monthly average contracts: Bought Sold Frontier Balanced Fund 1,070 1,008 Frontier Select Fund 4,019 4,191 Frontier Winton Fund 1,998 1,980
Schedule of realized trading revenue from futures, forwards and options	Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2019 Type of contract Frontier Balanced Fund Agriculturals $ 230,294 Currencies (104,139 ) Energies 124,324 Interest rates (43,735 ) Metals (71,367 ) Stock indices 151 Realized trading income/(loss) (1) $ 135,528 Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Frontier Balanced Fund Agriculturals $ (20,839 ) Currencies (374,202 ) Energies 74,850 Interest rates (62,765 ) Metals 11,010 Stock indices (4,991 ) Realized trading income/(loss) (1) $ (376,937 ) Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Frontier Balanced Fund Frontier Frontier Winton Fund Metals $ (134,275 ) $ (143,520 ) $ (1,595,961 ) Currencies 131,422 (290,393 ) (1,676,434 ) Energies 108,921 (485,509 ) (1,185,513 ) Agriculturals (551,945 ) 162,919 727,130 Interest rates (381,197 ) (894,051 ) (1,522,362 ) Stock indices 445,257 1,502,370 9,683,416 Realized trading income/(loss) (1) $ (381,817 ) $ (148,184 ) $ 4,430,276 (1) Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options.
Schedule of net trading gain loss	Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2019 Type of contract Frontier Balanced Fund Agriculturals $ (37,494 ) Currencies (127,586 ) Energies 9,624 Interest rates (4,922 ) Metals 26,498 Stock indices - Change in unrealized trading income/(loss) (1) $ (133,880 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Frontier Balanced Fund Agriculturals $ (16,846 ) Currencies (124,436 ) Energies (73,724 ) Interest rates 207,810 Metals 14,424 Stock indices 7,107 Change in unrealized trading income/(loss) (1) $ 14,335 Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Frontier Balanced Fund Frontier Frontier Winton Fund Metals $ (115,993 ) $ (57,373 ) $ 20,454 Currencies 85,174 (151,187 ) (565,953 ) Energies 78,514 (176,868 ) 124,997 Agriculturals (59,986 ) (26,685 ) 6,743 Interest rates (50,861 ) (214,247 ) (110,137 ) Stock indices 6,424 (59,662 ) (398,394 ) Change in unrealized trading income/(loss) (1) $ (56,728 ) $ (686,022 ) $ (922,290 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit)
Schedule for off setting of derivative assets and liabilities	As of December 31, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Frontier Balanced Fund Open Trade Equity/(Deficit) $ 154,778 $ (38,594 ) $ 116,184 Swap Contracts 11,944,753 - $ 11,944,753 Frontier Diversified Fund Swap Contracts $ 6,384,583 $ - $ 6,384,583 Frontier Long/Short Commodity Fund Swap Contracts $ 362,521 $ - $ 362,521 Frontier Heritage Fund Swap Contracts $ 2,888,009 $ - $ 2,888,009 As of December 31, 2018 Gross Amounts of Gross Amounts offset in the Statements of Net Amounts Presented Frontier Balanced Fund Open Trade Equity/(Deficit) $ 348,879 $ (128,220 ) $ 220,659 Swap Contracts 10,794,908 - $ 10,794,908 Frontier Diversified Fund Swap Contracts $ 5,920,414 $ - $ 5,920,414 Frontier Long/Short Commodity Fund Swap Contracts $ 479,102 $ - $ 479,102 Frontier Heritage Fund Swap Contracts $ 2,955,444 $ - $ 2,955,444
Frontier Funds [Member]
Schedule of averages futures contracts	he following tables summarize the trading revenues for the years ended December 31, 2019, 2018 and 2017 by contract type: Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2019 Type of contract Agriculturals $ 215,822 Currencies (553,764 ) Energies (430,890 ) Interest rates 273,302 Metals (691,581 ) Stock indices (34,113 ) Realized trading income/(loss) (1) $ (1,221,224 ) Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Agriculturals $ 147,573 Currencies (1,078,570 ) Energies 1,399,946 Interest rates 54,450 Metals 752,938 Stock indices (594,823 ) Realized trading income/(loss) (1) $ 681,514 Realized Trading Revenue from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Metals $ (1,881,246 ) Currencies (1,881,971 ) Energies (1,506,874 ) Agriculturals 308,770 Interest rates (2,849,356 ) Stock indices 11,602,528 Realized trading income/(loss) (1) $ 3,791,851 (1) Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options.
Schedule of realized trading revenue from futures, forwards and options	Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2019 Type of contract Agriculturals $ (92,782 ) Currencies 100,545 Energies 221,904 Interest rates (231,584 ) Metals 516,390 Stock indices 54,311 Change in unrealized trading income/(loss) (1) $ 568,784 Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2018 Type of contract Metals $ (83,504 ) Currencies (682,646 ) Energies (642,839 ) Agriculturals 494,997 Interest rates (1,035,591 ) Stock indices (195,081 ) Change in unrealized trading income/(loss) (1) $ (2,144,664 ) Net Change in Open Trade Equity from Futures, Forwards and Options for the Year Ended December 31, 2017 Type of contract Metals $ 556,638 Currencies (280,451 ) Energies 328,180 Agriculturals (213,814 ) Interest rates (524,406 ) Stock indices (221,354 ) Change in unrealized trading income/(loss) (1) $ (355,207 ) (1) Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit)
Schedule for off setting of derivative assets and liabilities	As of December 31, 2019 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Open Trade Equity/(Deficit) $ 154,778 $ (38,594 ) $ 116,184 Swap Contracts 21,579,866 - 21,579,866 As of December 31, 2018 Gross Amounts of recognized Derivative Assets Gross Amounts offset in the Statements of Financial Condition Net Amounts Presented in the Statements of Financial Condition Open Trade Equity/(Deficit) $ 3,244,057 $ (3,642,246 ) $ (398,189 ) Swap Contracts 20,149,868 - 20,149,868

Organization and Purpose (The S

Organization and Purpose (The Series of the Frontier Funds) (Details)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Organization and Purpose (Textual)
Managing owner contributions to the series of the trust percentage	1.00%
Aggregate initial and ongoing service fees	9.00%
Aggregate underwriting compensation percentage	10.00%
The Series of the Frontier Funds [Member] | Minimum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	30.00%
The Series of the Frontier Funds [Member] | Maximum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	70.00%
The Series of the Frontier Funds [Member] | Class 1 or Class 1a [Member]
Organization and Purpose (Textual)
Amortized monthly annual rate percentage	2.00%
Service fee percentage	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%
The Series of the Frontier Funds [Member] | Class 2 or Class 2a [Member]
Organization and Purpose (Textual)
Service fee percentage	0.50%
Percentage of NAV charged as a service fees	0.25%
Frontier Global Fund [Member]
Organization and Purpose (Textual)
Percentage of invested assets manages by trading company	100.00%

Organization and Purpose (Front

Organization and Purpose (Frontier Funds) (Details) - Frontier Fund [Member]	12 Months Ended
	Dec. 31, 2019
Organization and Purpose (Textual)
Managing owner contributions to the series of the trust percentage	1.00%
Aggregate initial and ongoing service fees	9.00%
Delaware statutory trust expire date	Dec. 31, 2053
Aggregate underwriting compensation percentage	10.00%
Percentage of average daily NAV charged as a service fees	2.00%
Percentage of NAV charged as a service fees	3.00%
Minimum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	30.00%
Maximum [Member]
Organization and Purpose (Textual)
Assets normally invested in one or more trading companies	70.00%
Class 1 or Class 1a [Member]
Organization and Purpose (Textual)
Service fee percentage	3.00%
Redemption fee percentage	2.00%
Amortized monthly annual rate	2.00%
Class 2 and Class 2a [Member]
Organization and Purpose (Textual)
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%

Significant Accounting Polici_3

Significant Accounting Policies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Managing owner percentage	2.00%
Restricted cash	$ 2,890,330	$ 1,717,065
Gross income of the Trust constitutes qualifying income	90.00%
Incentive fees percentage	10.00%
Incentive fee, description	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.
Frontier Diversified Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 22,531
Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	31,541
Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	319,698
Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	16,895
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Significant Accounting Policies (Textual)
Advance for service fee	150,025
Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	57,132
Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Advance for service fee	$ 220
Class 1 or Class 1a [Member]
Significant Accounting Policies (Textual)
Amortized monthly annual rate percentage	2.00%
Service fee percentage	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 2 or Class 2a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	0.50%
Percentage of NAV charged as a service fees	0.25%
Class 1AP, Class 2a and Class 3a [Member]
Significant Accounting Policies (Textual)
Aggregate interest income percentage	100.00%

Significant Accounting Polici_4

Significant Accounting Policies (Frontier Funds) (Details) - Frontier Fund [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies (Textual)
Gross income of the Trust constitutes qualifying income	90.00%
Incentive fee, description	The Managing Owner is allowed to share in the incentive fees earned by the Commodity Trading Advisors up to 10% of New Net Profits (as defined in the prospectus). If the Managing Owner’s share of the incentive fee exceeds 10% of new net profits during the period, then the Managing Owner is obligated to return any amount in excess.
Subscriptions in advance	$ 598,042
Class 1AP, Class 2a and Class 3a [Member]
Significant Accounting Policies (Textual)
Aggregate interest income from all sources, including assets held at clearing brokers is paid to the Managing Owner	100.00%
Class 2 and Class 2a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	0.50%
Service fee charged to limited owners	0.25%
Class 1 or Class 1a [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Amortized monthly annual rate	2.00%
Redemption fee percentage	2.00%
Class 1 or Class 1a [Member] | Frontier Diversified Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Amortized monthly annual rate	2.00%
Redemption fee percentage	2.00%
Class 1 or Class 1a [Member] | Frontier Masters Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Amortized monthly annual rate	2.00%
Redemption fee percentage	2.00%
Class 1 or Class 1a [Member] | Frontier Long/Short Commodity Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	2.00%
Amortized monthly annual rate	2.00%
Redemption fee percentage	2.00%
Class 1 or Class 1a [Member] | Frontier Balanced Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Amortized monthly annual rate	3.00%
Redemption fee percentage	3.00%
Class 1 or Class 1a [Member] | Frontier Heritage Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Amortized monthly annual rate	3.00%
Redemption fee percentage	3.00%
Class 1 or Class 1a [Member] | Frontier Select Fund [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Amortized monthly annual rate	3.00%
Redemption fee percentage	3.00%
Class 1 or Class 1a [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Significant Accounting Policies (Textual)
Service fee percentage	3.00%
Amortized monthly annual rate	3.00%
Redemption fee percentage	3.00%
Frontier Trading Company I LLC [Member]
Significant Accounting Policies (Textual)
Restricted cash	$ 2,890,330	$ 1,717,065
Frontier Trading Company II LLC [Member]
Significant Accounting Policies (Textual)
Restricted cash	$ 0	$ 4,621,100

Fair Value Measurements (The Se

Fair Value Measurements (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Swap Contracts	$ 6,384,583	$ 5,920,414
U.S. Treasury Securities	99,605	1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	24,150	1,160,910
Swap Contracts	6,384,583	5,920,414
U.S. Treasury Securities	99,605	1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	24,150	1,157,971
Swap Contracts
U.S. Treasury Securities	99,605	1,553,261
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		2,939
Swap Contracts
U.S. Treasury Securities
Frontier Diversified Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	6,384,583	5,920,414
U.S. Treasury Securities
Frontier Masters Fund [Member]
Swap Contracts
U.S. Treasury Securities	45,391	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	11,005	775,088
U.S. Treasury Securities	45,391	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	11,005	772,732
U.S. Treasury Securities	45,391	152,384
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		2,356
U.S. Treasury Securities
Frontier Masters Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member]
Swap Contracts	362,521	479,102
U.S. Treasury Securities	60,673	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	14,711	28,163
Swap Contracts	362,521	479,102
U.S. Treasury Securities	60,673	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	14,711	28,163
Swap Contracts
U.S. Treasury Securities	60,673	202,415
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies
Open Trade Equity (Deficit)
Swap Contracts
U.S. Treasury Securities
Frontier Long/Short Commodity Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	362,521	479,102
U.S. Treasury Securities
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	50,867	1,744,999
Open Trade Equity (Deficit)	116,184	220,659
Swap Contracts	11,944,753	10,794,908
U.S. Treasury Securities	209,799	123,409
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	50,867	1,739,609
Open Trade Equity (Deficit)	57,057	242,860
Swap Contracts
U.S. Treasury Securities	209,799	123,409
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		5,390
Open Trade Equity (Deficit)	59,127	(22,201)
Swap Contracts
U.S. Treasury Securities
Frontier Balanced Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Open Trade Equity (Deficit)
Swap Contracts	11,149,055	10,794,908
U.S. Treasury Securities
Frontier Select Fund [Member]
Swap Contracts
U.S. Treasury Securities	108,603	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	505,355	523,180
U.S. Treasury Securities	108,603	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	26,331	11,462
U.S. Treasury Securities	108,603	82,386
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Select Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies	479,024	511,718
U.S. Treasury Securities
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	11,818	4,292,075
U.S. Treasury Securities	48,741	3,126,551
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	11,818	4,280,023
U.S. Treasury Securities	48,741	3,126,551
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		12,052
U.S. Treasury Securities
Frontier Winton Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
U.S. Treasury Securities
Frontier Heritage Fund [Member]
Swap Contracts	2,888,008	2,955,444
U.S. Treasury Securities	77,916	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member]
Investment in Unconsolidated Trading Companies	18,891	726,686
Swap Contracts	2,888,008	2,955,444
U.S. Treasury Securities	77,916	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Investment in Unconsolidated Trading Companies	18,891	724,614
Swap Contracts
U.S. Treasury Securities	77,916	443,921
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Investment in Unconsolidated Trading Companies		2,072
Swap Contracts
U.S. Treasury Securities
Frontier Heritage Fund [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 Inputs [Member]
Investment in Unconsolidated Trading Companies
Swap Contracts	2,888,008	2,955,444
U.S. Treasury Securities

Fair Value Measurements (The _2

Fair Value Measurements (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Frontier Balanced Fund [Member] | Level 3 Inputs [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	$ 10,794,908	$ 11,340,959
Included in earnings-realized
Included in earnings-unrealized	1,149,845	1,453,948
Proceeds from collateral reduction		(1,999,999)
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	11,944,753	10,794,908	$ 11,340,959
Frontier Long/Short Commodity Fund [Member]
Total gains or losses (realized/unrealized):	(35)	18,068	(83,337)
Frontier Long/Short Commodity Fund [Member] | Level 3 Inputs [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	479,102	397,039
Included in earnings-realized
Included in earnings-unrealized	(116,581)	82,063
Proceeds from collateral reduction
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	362,521	479,102	397,039
Frontier Diversified Fund [Member]
Total gains or losses (realized/unrealized):	84,431	126,992	(160,009)
Frontier Diversified Fund [Member] | Level 3 Inputs [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	6,376,472	6,376,472
Included in earnings-realized
Included in earnings-unrealized	464,169	643,941
Proceeds from collateral reduction		(1,099,999)
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	6,384,583	6,376,472	6,376,472
Frontier Heritage Fund [Member]
Total gains or losses (realized/unrealized):	63,386	101,748	(333,988)
Frontier Heritage Fund [Member] | Level 3 Inputs [Member] | Swap [Member]
Beginning, Balance of recurring Level 3 assets	2,955,444	3,094,367
Included in earnings-realized
Included in earnings-unrealized	(67,436)	(138,923)
Proceeds from collateral reduction
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	2,888,008	2,955,444	3,094,367
Frontier Select Fund [Member]
Total gains or losses (realized/unrealized):	31,555	75,342	294,076
Frontier Select Fund [Member] | Level 3 Inputs [Member] | Investment in Unconsolidated Trading Companies [Member]
Beginning, Balance of recurring Level 3 assets	511,718	579,073
Change in fair value of investments in unconsolidated trading companies	(32,694)	(67,355)
Purchases of investments of unconsolidated trading companies
Change in ownership allocation
Transfers in and /or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 479,024	$ 511,718	$ 579,073

Fair Value Measurements (The _3

Fair Value Measurements (The Series of the Frontier Funds) (Details 2) - Swap Contracts [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
The Series of the Frontier Funds [Member] | Frontier Diversified Fund [Member]
Total change in unrealized appreciation (depreciation)	$ 464,169	$ 643,941	$ (47,375)
The Series of the Frontier Funds [Member] | Frontier Long/Short Commodity Fund [Member]
Total change in unrealized appreciation (depreciation)	(116,581)	82,063	26,621
The Series of the Frontier Funds [Member] | Frontier Balanced Fund [Member]
Total change in unrealized appreciation (depreciation)	1,149,845	1,453,948	$ (84,491)
The Series of the Frontier Funds [Member] | Frontier Heritage Fund [Member]
Total change in unrealized appreciation (depreciation)	(67,436)	(138,923)
Investments in Unconsolidated Trading Companies [Member] | Frontier Select Fund [Member]
Total change in unrealized appreciation (depreciation)	$ (32,694)	$ (67,355)

Fair Value Measurements (Fronti

Fair Value Measurements (Frontier Funds) (Details) - Fair Value, Measurements, Recurring [Member] - Frontier Funds [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Open Trade Equity (Deficit)	$ 116,184	$ (398,189)
Swap Contracts	21,579,865	20,149,868
U.S. Treasury Securities	650,728	5,684,327
Level 1 Inputs [Member]
Open Trade Equity (Deficit)	57,056	(400,796)
Swap Contracts
U.S. Treasury Securities	650,728	5,684,327
Level 2 Inputs [Member]
Open Trade Equity (Deficit)	59,128	2,607
Swap Contracts
U.S. Treasury Securities
Level 3 Inputs [Member]
Open Trade Equity (Deficit)
Swap Contracts	21,579,865	20,149,868
U.S. Treasury Securities

Fair Value Measurements (Fron_2

Fair Value Measurements (Frontier Funds) (Details 1) - Level 3 Inputs [Member] - Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Beginning, Balance of recurring Level 3 assets	$ 20,149,868	$ 21,208,838
Total gains or losses (realized/unrealized):
Included in earnings-realized
Included in earnings-unrealized	1,429,997	2,041,028
Proceeds from collateral reduction		(3,099,998)
Purchase of investments
Sale of investments
Transfers in and/or out of Level 3
Ending, Balance of recurring Level 3 assets	$ 21,579,865	$ 20,149,868

Fair Value Measurements (Fron_3

Fair Value Measurements (Frontier Funds) (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Swap [Member] | Frontier Funds [Member]
Total change in unrealized appreciation (depreciation)	$ 1,429,997	$ 2,041,028

Swap Contracts (The Series of t

Swap Contracts (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Swap [Member] - DeutscheBank AG [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Frontier Balanced Fund [Member]
Notional Amount	$ 7,420,403	$ 7,420,403
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 11,858,754	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	1,149,846	1,453,948
Fair Value	11,944,754	10,794,908
Advance on swap appreciation	(6,176,555)	(6,176,555)
Frontier Diversified Fund [Member]
Notional Amount	$ 1,761,834	$ 1,761,834
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 6,298,583	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	464,169	643,941
Fair Value	6,384,583	5,920,414
Advance on swap appreciation	(4,000,000)	(4,000,000)
Frontier Long/Short Commodity Fund [Member]
Notional Amount	$ 653,610	$ 653,610
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 29,950	$ 29,950
Swap Value	$ 332,571	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(116,581)	82,063
Fair Value	362,521	479,102
Advance on swap appreciation	(115,000)	(115,000)
Frontier Heritage Fund [Member]
Notional Amount	$ 2,072,056	$ 2,072,056
Termination Date	Mar. 27, 2023	Mar. 27, 2023
Cash Collateral	$ 975,450	$ 978,950
Swap Value	$ 1,912,559	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(67,435)	(138,924)
Fair Value	2,888,009	2,955,444
Advance on swap appreciation	$ (1,900,000)	$ (1,900,000)

Swap Contracts (The Series of_2

Swap Contracts (The Series of the Frontier Funds) (Details Textual) - The Series of the Frontier Funds [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Swap Contracts (The Series of the Frontier Funds) (Textual)
Percentage of trust's assets were deposited with over-the-counter counterparties	2.40%	1.60%
Cash holding shall be in excess amount	$ 250,000
Percentage of index exposure total	40.00%
Frontier Balanced Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	$ 6,176,555
Frontier Diversified Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	4,000,000	$ 4,000,000
Frontier Long/Short Commodity Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	115,000	115,000
Frontier Heritage Fund [Member]
Swap Contracts (The Series of the Frontier Funds) (Textual)
Advance on unrealized swap appreciation	$ 1,900,000	$ 1,900,000

Swap Contracts (Frontier Funds)

Swap Contracts (Frontier Funds) (Details) - Frontier Funds [Member] - DeutscheBank AG [Member] - Swap [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
XXXIV Balanced Select Swap [Member]
Counterparty
Notional Amount	$ 7,420,403	$ 7,420,403
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 11,858,754	$ 10,708,908
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	1,149,846	1,453,948
Fair Value	11,944,754	10,794,908
Advance on swap appreciation	(6,176,555)	(6,176,555)
XXXV Diversified Select Swap [Member]
Counterparty
Notional Amount	$ 1,761,834	$ 1,761,834
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 86,000	$ 86,000
Swap Value	$ 6,298,583	$ 5,834,414
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	464,169	643,941
Fair Value	6,384,583	5,920,414
Advance on swap appreciation	(4,000,000)	(4,000,000)
XXXVII L/S Select Swap [Member]
Counterparty
Notional Amount	$ 653,610	$ 653,610
Termination Date	Jul. 31, 2023	Jul. 31, 2023
Cash Collateral	$ 29,950	$ 29,950
Swap Value	$ 332,571	$ 449,152
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(116,581)	82,063
Fair Value	362,521	479,102
Advance on swap appreciation	(115,000)	(115,000)
Brevan Howard [Member]
Counterparty
Notional Amount	$ 2,072,056	$ 2,072,056
Termination Date	Mar. 27, 2023	Mar. 27, 2023
Cash Collateral	$ 975,450	$ 978,950
Swap Value	$ 1,912,559	$ 1,976,494
Investee Returns	Total Returns	Total Returns
Realized Gain/(Loss)	$ 0	$ 0
Change in Unrealized Gain/(Loss)	(67,435)	(138,924)
Fair Value	2,888,009	2,955,444
Advance on swap appreciation	$ (1,900,000)	$ (1,900,000)

Swap Contracts (Frontier Fund_2

Swap Contracts (Frontier Funds) (Details Textual) - Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Swaps Contracts (Textual)
Description of deposits assets	2.4% or $1,177,400	1.6% or $1,180,900
Cash holding shall be in excess amount	$ 250,000
Percentage of index exposure total	40.00%
XXXIV Balanced select swap [Member]
Swaps Contracts (Textual)
Advance on unrealized swap appreciation	$ 6,176,555
XXXV Diversified select swap [Member]
Swaps Contracts (Textual)
Advance on unrealized swap appreciation	4,000,000
XXXVII Long/Short select swap [Member]
Swaps Contracts (Textual)
Advance on unrealized swap appreciation	115,000
Brevan Howard Swap [Member]
Swaps Contracts (Textual)
Advance on unrealized swap appreciation	$ 1,900,000

Investments in Unconsolidated_3

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Fair Value	$ 24,150	$ 1,160,910
Frontier Diversified Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.20%	7.19%
Fair Value	$ 24,150	$ 1,160,910
Frontier Masters Fund [Member]
Fair Value	$ 11,005	$ 775,088
Frontier Masters Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.49%	13.91%
Fair Value	$ 11,005	$ 775,088
Frontier Long/Short Commodity Fund [Member]
Fair Value	$ 14,711	$ 28,163
Frontier Long/Short Commodity Fund [Member] | Frontier Trading Company XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	1.10%	1.15%
Fair Value	$ 14,711	$ 28,163
Frontier Balanced Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.23%	5.48%
Fair Value	$ 50,867	$ 1,744,999
Frontier Select Fund [Member]
Fair Value	$ 505,355	$ 523,180
Frontier Select Fund [Member] | Frontier Trading Companies XXXVIII and XXXIX [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	17.94%	13.56%
Fair Value	$ 505,355	$ 523,180
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Fair Value	$ 11,818	$ 4,292,075
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.25%	52.30%
Fair Value	$ 11,818	$ 4,292,075
Frontier Heritage Fund [Member]
Fair Value	$ 18,891	$ 726,686
Frontier Heritage Fund [Member] | Frontier Trading Companies II and XXXVIII [Member]
Percentage of Series Total Capital Invested in Unconsolidated Trading Companies	0.57%	16.27%
Fair Value	$ 18,891	$ 726,686

Investments in Unconsolidated_4

Investments in Unconsolidated Trading Companies and Private Investment Companies (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member]	12 Months Ended
	Dec. 31, 2019
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Diversified Fund [Member] | Option Trading [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Masters Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Long/Short Commodity Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - EvE STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Balanced Fund [Member] | Option Trading [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Frontier Select Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Select Fund [Member] | Trend Following [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Frontier Heritage Fund [Member] | Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None

Investments in Private Investme

Investments in Private Investment Companies (Frontier Funds) (Details) - Frontier Funds [Member]	12 Months Ended
	Dec. 31, 2019
Multi-Strategy [Member] | Galaxy Plus Fund - Emil van Essen STP Feeder Fund (516) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - LRR Feeder Fund (522) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - Quantmetrics Feeder Fund (527) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Multi-Strategy [Member] | Galaxy Plus Fund - Welton GDP Feeder Fund (538) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Aspect Feeder Fund (532) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Fort Contrarian Feeder Fund (510) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - QIM Feeder Fund (526) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - Quest Feeder Fund (517) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None
Trend Following [Member] | Galaxy Plus Fund - TT Feeder Fund (531) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Weekly
Liquidity Restrictions	None
Option Trading [Member] | Galaxy Plus Fund - Doherty Feeder Fund (528) LLC [Member]
Redemptions Notice Period	24 hours
Redemptions Permitted	Daily
Liquidity Restrictions	None

Transactions with Affiliates _2

Transactions with Affiliates (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Frontier Diversified Fund [Member]
Incentive (Rebate) Fees		$ (4,499)	$ (50,661)
Management Fee	2,668	44,289	69,478
Service Fee	44,726	58,473	132,465
Trading Fee	493,585	591,665	1,347,386
Frontier Masters Fund [Member]
Incentive (Rebate) Fees
Management Fee	7,665	108,413	184,365
Service Fee	11,635	49,049	89,344
Trading Fee	213,153	420,391	672,227
Frontier Long/Short Commodity Fund [Member]
Incentive (Rebate) Fees		(3,789)	(144,752)
Management Fee
Service Fee	562	1,653	13,672
Trading Fee	54,334	82,890	234,923
Frontier Balanced Fund [Member]
Incentive (Rebate) Fees		145,134	40,189
Management Fee	22,377	77,495	107,368
Service Fee	606,359	920,570	1,409,337
Trading Fee	972,678	1,378,226	2,058,870
Frontier Select Fund [Member]
Incentive (Rebate) Fees
Management Fee			84,734
Service Fee	102,692	132,408	220,938
Trading Fee	85,589	117,056	176,459
Frontier Global Fund (Formerly Frontier Winton Fund) [Member]
Incentive (Rebate) Fees
Management Fee	38,679
Service Fee	177,833
Trading Fee	278,497
Frontier Heritage Fund [Member]
Incentive (Rebate) Fees		697	(4,603)
Management Fee	7,289	120,602	193,000
Service Fee	84,518	123,257	182,048
Trading Fee	$ 118,979	142,735	191,996
Frontier Winton Fund [Member]
Incentive (Rebate) Fees			(75,099)
Management Fee		487,698	877,626
Service Fee		318,897	465,225
Trading Fee		$ 307,053	$ 565,481

Transactions with Affiliates _3

Transactions with Affiliates (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Frontier Diversified Fund [Member]
Incentive Fees		$ 10,897
Management Fees		3,875
Interest Fees
Service Fees	3,391	4,498
Trading Fees Payable	35,877	44,827
Frontier Masters Fund [Member]
Incentive Fees
Management Fees		8,347
Interest Fees
Service Fees	204	1,750
Trading Fees Payable	11,673	27,984
Frontier Long/Short Commodity Fund [Member]
Incentive Fees
Management Fees
Interest Fees
Service Fees		51
Trading Fees Payable	3,468	5,306
Frontier Balanced Fund [Member]
Incentive Fees
Management Fees	8,795	13,917
Interest Fees	105	1,490
Service Fees	41,635	56,791
Trading Fees Payable	70,179	101,770
Frontier Select Fund [Member]
Incentive Fees
Management Fees
Interest Fees
Service Fees	6,906	8,575
Trading Fees Payable	6,000	7,812
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Incentive Fees
Management Fees
Interest Fees	56
Service Fees	11,263
Trading Fees Payable	22,540
Frontier Heritage Fund [Member]
Incentive Fees
Management Fees		9,201
Interest Fees	166	1,238
Service Fees	5,362	6,684
Trading Fees Payable	$ 11,170	10,189
Formerly Frontier Winton Fund [Member]
Incentive Fees
Management Fees		42,705
Interest Fees		8,124
Service Fees		17,803
Trading Fees Payable		$ 24,353

Transactions with Affiliates _4

Transactions with Affiliates (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Managing Owner [Member]
Gross Amount Paid to the Managing Owner	$ 42,605	$ 221,534	$ 426,185
Frontier Diversified Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner			$ (3,860)
Ratio to Average Net Assets	0.00%	0.00%	(0.12%)
Frontier Diversified Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner			$ (19,555)
Ratio to Average Net Assets	0.00%	0.00%	(0.18%)
Frontier Diversified Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner			$ (7,071)
Ratio to Average Net Assets	0.00%	0.00%	(0.07%)
Frontier Masters Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner
Ratio to Average Net Assets	0.00%	0.00%
Frontier Masters Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner			$ (4,988)
Ratio to Average Net Assets	0.00%	0.00%	(0.16%)
Frontier Masters Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner			$ (5,113)
Ratio to Average Net Assets	0.00%	0.00%	(0.14%)
Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 14	$ 141	$ 211
Ratio to Average Net Assets	0.02%	0.00%	0.07%
Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Gross Amount Paid to the Managing Owner	$ 337	$ 1,902	$ 1,942
Ratio to Average Net Assets	0.02%	0.39%	0.07%
Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Gross Amount Paid to the Managing Owner			$ 533
Ratio to Average Net Assets	0.00%	0.00%	0.24%
Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Gross Amount Paid to the Managing Owner			$ 233
Ratio to Average Net Assets	0.00%	0.00%	0.05%
Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Gross Amount Paid to the Managing Owner			$ 189
Ratio to Average Net Assets	0.00%	0.00%	0.02%
Frontier Balanced Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 3,925	$ 47,797	$ 204,989
Ratio to Average Net Assets	0.02%	0.16%	0.49%
Frontier Balanced Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 764	$ 8,556	$ 55,580
Ratio to Average Net Assets	0.02%	0.16%	0.69%
Frontier Balanced Fund [Member] | Class 2a [Member]
Gross Amount Paid to the Managing Owner	$ 10	$ (237)	$ 516
Ratio to Average Net Assets	0.00%	(0.06%)	0.10%
Frontier Balanced Fund [Member] | Class 3a [Member]
Gross Amount Paid to the Managing Owner	$ 32	$ (520)	$ 1,314
Ratio to Average Net Assets	0.00%	(0.05%)	0.09%
Frontier Balanced Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 64	$ (1,082)	$ 2,627
Ratio to Average Net Assets	0.02%	(0.21%)	0.45%
Frontier Select Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 5,563	$ 8,986	$ 31,053
Ratio to Average Net Assets	0.16%	0.10%	0.58%
Frontier Select Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 174	$ 919	$ 4,681
Ratio to Average Net Assets	0.16%	0.11%	0.55%
Frontier Select Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 15	$ 39	$ 94
Ratio to Average Net Assets	0.19%	0.13%	1.68%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 23,787	$ 122,387	$ 76,277
Ratio to Average Net Assets	0.40%	3.30%	0.59%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 1,386	$ 10,552	$ 41,050
Ratio to Average Net Assets	0.35%	0.17%	0.42%
Frontier Global Fund (formerly Frontier Winton Fund) [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 114	$ 623	$ 149
Ratio to Average Net Assets	0.33%	0.01%	0.43%
Frontier Heritage Fund [Member] | Class 1 [Member]
Gross Amount Paid to the Managing Owner	$ 5,323	$ 18,510	$ 40,215
Ratio to Average Net Assets	0.19%	0.70%	0.67%
Frontier Heritage Fund [Member] | Class 2 [Member]
Gross Amount Paid to the Managing Owner	$ 1,088	$ 2,948	$ 10,965
Ratio to Average Net Assets	0.16%	0.10%	1.28%
Frontier Heritage Fund [Member] | Class 1AP [Member]
Gross Amount Paid to the Managing Owner	$ 9	$ 13	$ 36
Ratio to Average Net Assets	0.15%	0.00%	0.16%

Transactions with Affiliates _5

Transactions with Affiliates (The Series of the Frontier Funds) (Details Narrative) - The Series of the Frontier Funds [Member] - USD ($)	1 Months Ended			12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Transactions with Affiliates (Textual)
Description of incentive fee percentage				The incentive fee is 25% for the Frontier Balanced Fund and the Frontier Diversified Fund and 20% for the Frontier Global Fund (formerly Frontier Winton Fund), Frontier Heritage Fund, Frontier Select Fund, Frontier Long/Short Commodity Fund and Frontier Masters Fund.
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.	(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.
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 (formerly Frontier Winton 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 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 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 (formerly Frontier Winton 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 Balanced Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 319,698			$ 319,698
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 220			220
Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest			0.25%
Subscriptions in advance for service fee	$ 22,531			$ 22,531
Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest						0.25%
Subscriptions in advance for service fee	31,541			$ 31,541
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	150,025			150,025
Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	57,132			57,132
Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Subscriptions in advance for service fee	$ 16,895			$ 16,895
Managing Owner [Member]
Transactions with Affiliates (Textual)
Percentage of minimum purchase commitment				1.00%
Percentage of contributes funds to trust				1.00%
Percentage of interest in specific series of trust				1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member]
Transactions with Affiliates (Textual)
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%		1.00%	1.00%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1AP [Member]
Transactions with Affiliates (Textual)
Percentage of interest				1.00%
Percentage of management fee	0.50%			0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 2a [Member]
Transactions with Affiliates (Textual)
Percentage of interest				1.00%
Percentage of management fee	0.50%			0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 1 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%			0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 2 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%			0.50%
Managing Owner [Member] | Frontier Balanced Fund [Member] | Class 3a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	0.50%			0.50%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest				1.00%
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.50%	1.50%		1.50%	1.50%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%			2.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	3.50%			3.50%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%			2.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%			2.00%
Managing Owner [Member] | Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	3.50%			3.50%
Managing Owner [Member] | Frontier Diversified Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest				1.00%
Percentage of management fee	0.75%			0.75%
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Diversified Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%		1.00%	1.00%
Managing Owner [Member] | Frontier Masters Fund [Member]
Transactions with Affiliates (Textual)
Percentage of interest				1.00%
Percentage of management fee	2.00%			2.00%
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.00%			2.00%
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Heritage Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.50%			2.50%
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Heritage Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%		1.00%	1.00%
Managing Owner [Member] | Frontier Select Fund [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	2.50%			2.50%
Percentage of FCM fee	2.25%			2.25%
Managing Owner [Member] | Frontier Select Fund [Member] | Swap [Member]
Transactions with Affiliates (Textual)
Percentage of management fee	1.00%	1.00%		1.00%	1.00%

Transactions with Affiliates (F

Transactions with Affiliates (Frontier Funds) (Details) - Managing Owner [Member] - Frontier Funds [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of contributes funds to trust	1.00%
Percentage of minimum purchase commitment	1.00%
Percentage of interest in specific series of trust	1.00%
Trust had payable for incentive fees	$ 0	$ 10,897	$ 53,036
Trust had payable for management fees	8,795	78,045	90,972
Trust had payable for interest fees	327	10,852	26,007
Trust had payable for service fees	68,762	96,152	148,445
Trust had payable for trading fees	160,907	222,241	334,485
Trust paid for incentive fees	0	137,543	(147,256)
Trust paid for management fees	78,678	838,497	1,516,571
Trust paid for service fees	1,028,325	1,604,307	2,513,028
Trust paid for trading fees	2,216,815	3,040,016	5,247,342
Prepaid initial service fees	0	0	31,887
Trust paid	$ 42,605	$ 221,534	$ 426,185
Class 1 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	3.00%
Class 1a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	2.00%
Class 2 Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of service fee	0.25%
Frontier Balanced Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	25.00%
Frontier Balanced Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Frontier Balanced Fund [Member] | Swap [Member] | Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%
Frontier Balanced Fund [Member] | Swap [Member] | Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%
Frontier Balanced Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Balanced Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Balanced Fund [Member] | Class 1 and Class 2 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	0.50%
Percentage of aggregate interest income	2.00%
Frontier Balanced Fund [Member] | Class 1AP, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Percentage of interest is retained by respective series	100.00%
Frontier Long/Short Commodity Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Frontier Long/Short Commodity Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.50%
Percentage of incentive fee	25.00%
Frontier Long/Short Commodity Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Long/Short Commodity Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Long/Short Commodity Fund [Member] | Class 1a, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%
Percentage of interest is retained by respective series	100.00%
Frontier Long/Short Commodity Fund [Member] | Class 2 and Class 3 [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	3.50%
Percentage of aggregate interest income	2.00%
Frontier Diversified Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	0.75%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	25.00%
Frontier Diversified Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Frontier Diversified Fund [Member] | Swap [Member] | Maximum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	25.00%
Frontier Diversified Fund [Member] | Swap [Member] | Minimum [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of incentive fee	20.00%
Frontier Diversified Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Diversified Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Diversified Fund [Member] | Class 1a, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest is retained by respective series	100.00%
Frontier Masters Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Frontier Masters Fund [Member] | Class 1AP Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Masters Fund [Member] | Class 2a Units [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest	1.00%
Frontier Masters Fund [Member] | Class 1AP, Class 2a and Class 3a [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of interest is retained by respective series	100.00%
Frontier Global Fund (formerly Frontier Winton Fund) [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.00%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Percentage of aggregate interest income	2.00%
Frontier Heritage Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Percentage of aggregate interest income	2.00%
Frontier Heritage Fund [Member] | Swap [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	1.00%
Percentage of incentive fee	15.00%
Frontier Select Fund [Member]
Transactions with Affiliates (Frontier Funds) (Textual)
Percentage of management fee	2.50%
Percentage of FCM fee	2.25%
Percentage of series NAV	0.12%
Percentage of incentive fee	20.00%
Percentage of aggregate interest income	2.00%

Financial Highlights (The Serie

Financial Highlights (The Series of the Frontier Funds) (Details) - Series of Frontier Funds [Member] - $ / shares		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Frontier Diversified Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 102.25	$ 116.41		$ 116.43
Interest income		0.15	0.21	[1]	0.29	[1]
Expenses		(6.83)	(7.04)	[1]	(8.27)	[1]
Net gain/(loss) on investments, net of non-controlling interests		5.54	(7.33)	[1]	7.96	[1]
Net income/(loss)		(1.15)	(14.16)	[1]	(0.02)	[1]
Net asset value		$ 101.10	$ 102.25	[1]	$ 116.41	[1]
Net investment income/(loss)		(6.58%)	(8.66%)		(9.18%)
Expenses before incentive fees	[2],[3]	6.73%	3.86%		9.65%
Expenses after incentive fees	[2],[3]	6.73%	3.93%		9.52%
Total return before incentive fee	[4]	(1.12%)	(10.20%)		(0.15%)
Total return after incentive fees	[4]	(1.12%)	(10.27%)		(0.02%)
Frontier Diversified Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 120.84	$ 135.19		$ 132.94
Interest income		0.17	0.19	[1]	0.34	[1]
Expenses		(4.47)	(3.72)	[1]	(4.76)	[1]
Net gain/(loss) on investments, net of non-controlling interests		5.03	(10.16)	[1]	6.67	[1]
Net income/(loss)		0.74	(14.35)	[1]	2.25	[1]
Net asset value		$ 121.58	$ 120.84	[1]	$ 135.19	[1]
Net investment income/(loss)		(3.55%)	(4.56%)		(4.41%)
Expenses before incentive fees	[2],[3]	3.70%	4.825%		4.88%
Expenses after incentive fees	[2],[3]	3.70%	4.82%		4.75%
Total return before incentive fee	[4]	0.61%	(10.64%)		1.56%
Total return after incentive fees	[4]	0.61%	(10.61%)		1.69%
Frontier Diversified Fund [Member] | Class 3 [Member]
Net asset value	[1]	$ 112.62	$ 125.68		$ 123.27
Interest income		0.16	0.23	[1]	0.31	[1]
Expenses		(4.17)	(4.13)	[1]	(4.39)	[1]
Net gain/(loss) on investments, net of non-controlling interests		4.99	(9.16)	[1]	6.49	[1]
Net income/(loss)		0.98	(13.06)	[1]	2.41	[1]
Net asset value		$ 113.61	$ 112.62	[1]	$ 125.68	[1]
Net investment income/(loss)		(3.55%)	(4.56%)		(4.41%)
Expenses before incentive fees	[2],[3]	3.70%	4.85%		4.88%
Expenses after incentive fees	[2],[3]	3.70%	4.82%		4.75%
Total return before incentive fee	[4]	0.87%	(10.42%)		1.82%
Total return after incentive fees	[4]	0.87%	(10.39%)		1.96%
Frontier Masters Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 91.10	$ 114.74		$ 128.78
Interest income		0.11	0.3	[1]	0.61	[1]
Expenses		(7.39)	(9.05)	[1]	(9.05)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(11.54)	(14.88)	[1]	10.38	[1]
Net income/(loss)		(18.82)	(23.64)	[1]	1.94	[1]
Net asset value		$ 72.28	$ 91.10	[1]	$ 114.74	[1]
Net investment income/(loss)		(8.52%)	(12.07%)		(10.21%)
Expenses before incentive fees	[2],[3]	8.65%	12.47%		10.95%
Expenses after incentive fees	[2],[3]	8.65%	12.47%		10.95%
Total return before incentive fee	[4]	(20.66%)	(20.60%)		1.72%
Total return after incentive fees	[4]	(20.66%)	(20.60%)		1.72%
Frontier Masters Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 107.68	$ 133.27		$ 112.8
Interest income		0.13	0.35	[1]	0.7	[1]
Expenses		(6.11)	(8.14)	[1]	(7.54)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(14.52)	(17.80)	[1]	11.33	[1]
Net income/(loss)		(20.49)	(25.59)	[1]	4.49	[1]
Net asset value		$ 87.18	$ 107.68	[1]	$ 133.27	[1]
Net investment income/(loss)		(5.91%)	(9.10%)		(7.19%)
Expenses before incentive fees	[2],[3]	6.04%	9.51%		7.93%
Expenses after incentive fees	[2],[3]	6.04%	9.51%		7.93%
Total return before incentive fee	[4]	(19.03%)	(19.20%)		3.49%
Total return after incentive fees	[4]	(19.03%)	(19.20%)		3.49%
Frontier Masters Fund [Member] | Class 3 [Member]
Net asset value	[1]	$ 100.77	$ 124.40		$ 92.78
Interest income		0.12	0.33	[1]	0.65	[1]
Expenses		(5.75)	(7.55)	[1]	(6.99)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(13.36)	(16.41)	[1]	10.85	[1]
Net income/(loss)		(18.98)	(23.63)	[1]	4.51	[1]
Net asset value		$ 81.78	$ 100.77	[1]	$ 124.40	[1]
Net investment income/(loss)		(5.91%)	(9.10%)		(7.19%)
Expenses before incentive fees	[2],[3]	6.04%	9.51%		7.93%
Expenses after incentive fees	[2],[3]	6.04%	9.51%		7.93%
Total return before incentive fee	[4]	(18.84%)	(19.00%)		3.76%
Total return after incentive fees	[4]	(18.84%)	(19.00%)		3.76%
Frontier Long/Short Commodity Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 98.82	$ 115.81		$ 129.56
Interest income		0.10	0.41	[1]	0	[1]
Expenses		(2.57)	(2.61)	[1]	(3.55)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(14.74)	(14.79)	[1]	(10.20)	[1]
Net income/(loss)		(17.22)	(16.99)	[1]	(13.75)	[1]
Net asset value		$ 81.60	$ 98.82	[1]	$ 115.81	[1]
Net investment income/(loss)		(2.67%)	(2.73%)		(4.08%)
Expenses before incentive fees	[2],[3]	2.77%	3.34%		4.98%
Expenses after incentive fees	[2],[3]	2.77%	3.23%		4.08%
Total return before incentive fee	[4]	(17.43%)	(14.78%)		(11.52%)
Total return after incentive fees	[4]	(17.43%)	(14.67%)		(10.61%)
Frontier Long/Short Commodity Fund [Member] | Class 3 [Member]
Net asset value	[1]	$ 103.66	$ 121.50		$ 130.8
Interest income		0.10	0.42	[1]	0	[1]
Expenses		(2.70)	(2.71)	[1]	(3.61)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(15.41)	(15.56)	[1]	(5.69)	[1]
Net income/(loss)		(18.02)	(17.84)	[1]	(9.30)	[1]
Net asset value		$ 85.64	$ 103.66	[1]	$ 121.50	[1]
Net investment income/(loss)		(2.67%)	(2.73%)		(4.08%)
Expenses before incentive fees	[2],[3]	2.77%	3.34%		4.98%
Expenses after incentive fees	[2],[3]	2.77%	3.23%		4.08%
Total return before incentive fee	[4]	(17.38%)	(14.80%)		(8.02%)
Total return after incentive fees	[4]	(17.38%)	(14.68%)		(7.11%)
Frontier Long/Short Commodity Fund [Member] | Class 1a [Member]
Net asset value	[1]	$ 56.8	$ 81.35		$ 119.89
Interest income		0.05	0.28	[1]	0.01	[1]
Expenses		(3.24)	(4.71)	[1]	(4.71)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(9.41)	(20.12)	[1]	(6.73)	[1]
Net income/(loss)		(12.60)	(24.55)	[1]	(11.43)	[1]
Net asset value		$ 44.20	$ 56.8	[1]	$ 81.35	[1]
Net investment income/(loss)		(6.45%)	(7.95%)		(7.09%)
Expenses before incentive fees	[2],[3]	6.55%	8.56%		7.99%
Expenses after incentive fees	[2],[3]	6.55%	8.45%		7.09%
Total return before incentive fee	[4]	(22.19%)	(30.29%)		(13.23%)
Total return after incentive fees	[4]	(22.19%)	(30.18%)		(12.32%)
Frontier Long/Short Commodity Fund [Member] | Class 2a [Member]
Net asset value	[1]	$ 66.52	$ 93.59		$ 105.67
Interest income		0.06	0.31	[1]	(0.01)	[1]
Expenses		(1.62)	(2.01)	[1]	(2.89)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(12.41)	(25.38)	[1]	(9.18)	[1]
Net income/(loss)		(13.97)	(27.07)	[1]	(12.08)	[1]
Net asset value		$ 52.55	$ 66.52	[1]	$ 93.59	[1]
Net investment income/(loss)		(2.67%)	(2.73%)		(4.08%)
Expenses before incentive fees	[2],[3]	2.77%	3.34%		4.98%
Expenses after incentive fees	[2],[3]	2.77%	3.23%		4.08%
Total return before incentive fee	[4]	(21.00%)	(29.04%)		(12.34%)
Total return after incentive fees	[4]	(21.00%)	(28.92%)		(11.43%)
Frontier Long/Short Commodity Fund [Member] | Class 3a [Member]
Net asset value	[1]	$ 69.83	$ 97.99		$ 107.5
Interest income		0.06	0.33	[1]	0	[1]
Expenses		(1.70)	(2.12)	[1]	(2.94)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(12.88)	(26.37)	[1]	(6.57)	[1]
Net income/(loss)		(14.51)	(28.16)	[1]	(9.51)	[1]
Net asset value		$ 55.31	$ 69.83	[1]	$ 97.99	[1]
Net investment income/(loss)		(2.67%)	(2.74%)		(4.16%)
Expenses before incentive fees	[2],[3]	2.77%	3.38%		5.31%
Expenses after incentive fees	[2],[3]	2.77%	3.24%		4.16%
Total return before incentive fee	[4]	(20.79%)	(28.88%)		(10.00%)
Total return after incentive fees	[4]	(20.79%)	(28.74%)		(8.85%)
Frontier Balanced Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 117.63	$ 135.96		$ 134.80
Interest income		0.21	0.12	[1]	0.05	[1]
Expenses		(8.01)	(8.93)	[1]	(8.66)	[1]
Net gain/(loss) on investments, net of non-controlling interests		7.40	(9.52)	[1]	9.77	[1]
Net income/(loss)		(0.40)	(18.33)	[1]	1.16	[1]
Net asset value		$ 117.23	$ 117.63	[1]	$ 135.96	[1]
Net investment income/(loss)		(6.73%)	(9.49%)		(8.50%)
Expenses before incentive fees	[2],[3]	6.91%	9.24%		8.48%
Expenses after incentive fees	[2],[3]	6.91%	9.62%		8.54%
Total return before incentive fee	[4]	(0.34%)	(13.10%)		0.92%
Total return after incentive fees	[4]	(0.34%)	(13.48%)		0.86%
Frontier Balanced Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 180.94	$ 202.9		$ 194.99
Interest income		0.33	0.19	[1]	0.07	[1]
Expenses		(7.08)	(7.95)	[1]	(6.80)	[1]
Net gain/(loss) on investments, net of non-controlling interests		11.63	(14.20)	[1]	14.64	[1]
Net income/(loss)		4.88	(21.96)	[1]	7.91	[1]
Net asset value		$ 185.82	$ 180.94	[1]	$ 202.9	[1]
Net investment income/(loss)		(3.73%)	(5.48%)		(4.51%)
Expenses before incentive fees	[2],[3]	3.91%	5.23%		4.49%
Expenses after incentive fees	[2],[3]	3.91%	5.62%		4.56%
Total return before incentive fee	[4]	2.70%	(10.44%)		4.12%
Total return after incentive fees	[4]	2.70%	(10.82%)		4.06%
Frontier Balanced Fund [Member] | Class 2a [Member]
Net asset value	[1]	$ 156.81	$ 175.77		$ 169.05
Interest income		0.28	0.16	[1]	0.06	[1]
Expenses		(6.12)	(6.89)	[1]	(5.90)	[1]
Net gain/(loss) on investments, net of non-controlling interests		10.08	(12.23)	[1]	12.56	[1]
Net income/(loss)		4.23	(18.96)	[1]	6.72	[1]
Net asset value		$ 161.04	$ 156.81	[1]	$ 175.77	[1]
Net investment income/(loss)		(3.73%)	(5.48%)		(4.51%)
Expenses before incentive fees	[2],[3]	3.91%	5.23%		4.49%
Expenses after incentive fees	[2],[3]	3.91%	5.62%		4.56%
Total return before incentive fee	[4]	2.70%	(10.41%)		4.04%
Total return after incentive fees	[4]	2.70%	(10.79%)		3.98%
Frontier Balanced Fund [Member] | Class 3a [Member]
Net asset value	[1]	$ 156.26	$ 175.18		$ 168.49
Interest income		0.28	0.16	[1]	0.06	[1]
Expenses		(6.12)	(6.87)	[1]	(5.87)	[1]
Net gain/(loss) on investments, net of non-controlling interests		10.08	(12.21)	[1]	12.5	[1]
Net income/(loss)		4.24	(18.92)	[1]	6.69	[1]
Net asset value		$ 160.50	$ 156.26	[1]	$ 175.18	[1]
Net investment income/(loss)		(3.73%)	(5.48%)		(4.51%)
Expenses before incentive fees	[2],[3]	3.91%	5.23%		4.49%
Expenses after incentive fees	[2],[3]	3.91%	5.62%		4.56%
Total return before incentive fee	[4]	2.71%	(10.42%)		4.03%
Total return after incentive fees	[4]	2.71%	(10.80%)		3.97%
Frontier Balanced Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 134.16	$ 150.56		$ 144.97
Interest income		0.24	0.14	[1]	0.05	[1]
Expenses		(5.25)	(5.90)	[1]	(5.04)	[1]
Net gain/(loss) on investments, net of non-controlling interests		8.66	(10.64)	[1]	10.58	[1]
Net income/(loss)		3.65	(16.40)	[1]	5.59	[1]
Net asset value		$ 137.81	$ 134.16	[1]	$ 150.56	[1]
Net investment income/(loss)		(3.73%)	(5.48%)		(4.51%)
Expenses before incentive fees	[2],[3]	3.91%	5.23%		4.49%
Expenses after incentive fees	[2],[3]	3.91%	5.62%		4.56%
Total return before incentive fee	[4]	2.72%	(10.51%)		3.92%
Total return after incentive fees	[4]	2.72%	(10.89%)		3.86%
Frontier Select Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 71.41	$ 90.27		$ 94.06
Interest income		0	0	[1]	0	[1]
Expenses		(3.93)	(4.19)	[1]	(5.33)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(0.93)	(14.67)	[1]	1.54	[1]
Net income/(loss)		(4.86)	(18.86)	[1]	(3.79)	[1]
Net asset value		$ 66.56	$ 71.41	[1]	$ 90.27	[1]
Net investment income/(loss)		(5.42%)	(7.38%)		(8.23%)
Expenses before incentive fees	[2],[3]	(5.42%)	7.38%		8.23%
Expenses after incentive fees	[2],[3]	5.42%	7.38%		8.23%
Total return before incentive fee	[4]	(6.80%)	(20.89%)		(4.03%)
Total return after incentive fees	[4]	(6.80%)	(20.89%)		(4.03%)
Frontier Select Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 108.18	$ 132.73		$ 134.25
Interest income		0	0	[1]	0	[1]
Expenses		(2.69)	(2.94)	[1]	(3.98)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(1.55)	(21.61)	[1]	2.46	[1]
Net income/(loss)		(4.24)	(24.55)	[1]	(1.52)	[1]
Net asset value		$ 103.94	$ 108.18	[1]	$ 132.73	[1]
Net investment income/(loss)		(2.42%)	(3.37%)		(4.24%)
Expenses before incentive fees	[2],[3]	(2.42%)	3.37%		4.24%
Expenses after incentive fees	[2],[3]	2.42%	3.37%		4.24%
Total return before incentive fee	[4]	(3.92%)	(18.50%)		(1.13%)
Total return after incentive fees	[4]	(3.92%)	(18.50%)		(1.13%)
Frontier Select Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 82.48	$ 100.02		$ 101.16
Interest income		0	0	[1]	0	[1]
Expenses		(2.09)	(2.15)	[1]	(2.99)	[1]
Net gain/(loss) on investments, net of non-controlling interests		(1.88)	(15.39)	[1]	1.85	[1]
Net income/(loss)		(3.97)	(17.54)	[1]	(1.14)	[1]
Net asset value		$ 78.51	$ 82.48	[1]	$ 100.02	[1]
Net investment income/(loss)		(2.42%)	(3.37%)		(4.24%)
Expenses before incentive fees	[2],[3]	2.42%	3.37%		4.24%
Expenses after incentive fees	[2],[3]	2.42%	3.37%		4.24%
Total return before incentive fee	[4]	(4.81%)	(17.54%)		(1.13%)
Total return after incentive fees	[4]	(4.81%)	(17.54%)		(1.13%)
Frontier Global Fund (formerly Winton Fund) [Member] | Class 1 [Member]
Net asset value	[1]	$ 131.57	$ 146.02		$ 159.08
Interest income		0	0	[1]	0.32	[1]
Expenses		(11.16)	(14.29)	[1]	(10.70)	[1]
Net gain/(loss) on investments, net of non-controlling interests		11.11	(13.22)	[1]	(2.36)	[1]
Net income/(loss)		(0.05)	(27.51)	[1]	(13.06)	[1]
Net asset value		$ 131.52	$ 131.57	[1]	$ 146.02	[1]
Net investment income/(loss)		(7.99%)	(13.50%)		(9.52%)
Expenses before incentive fees	[2],[3]	7.99%	13.50%		9.52%
Expenses after incentive fees	[2],[3]	7.99%	13.50%		9.52%
Total return before incentive fee	[4]	(0.04%)	(17.29%)		(8.21%)
Total return after incentive fees	[4]	(0.04%)	(17.29%)		(8.21%)
Frontier Global Fund (formerly Winton Fund) [Member] | Class 2 [Member]
Net asset value	[1]	$ 187.17	$ 206.20		$ 216.50
Interest income		0	0.01	[1]	0	[1]
Expenses		(10.11)	(14.12)	[1]	(10.43)	[1]
Net gain/(loss) on investments, net of non-controlling interests		15.76	(15.21)	[1]	0.13	[1]
Net income/(loss)		5.65	(29.33)	[1]	(10.30)	[1]
Net asset value		$ 192.82	$ 187.17	[1]	$ 206.20	[1]
Net investment income/(loss)		(4.99%)	(9.49%)		(6.52%)
Expenses before incentive fees	[2],[3]	4.99%	9.49%		6.52%
Expenses after incentive fees	[2],[3]	4.99%	9.49%		6.52%
Total return before incentive fee	[4]	3.02%	(13.55%)		(4.76%)
Total return after incentive fees	[4]	3.02%	(13.55%)		(4.76%)
Frontier Global Fund (formerly Winton Fund) [Member] | Class 1AP [Member]
Net asset value	[1]	$ 149.92	$ 165.51		$ 176.44
Interest income		0	0	[1]	0	[1]
Expenses		(8.15)	(11.05)	[1]	(8.20)	[1]
Net gain/(loss) on investments, net of non-controlling interests		12.66	(15.47)	[1]	(2.73)	[1]
Net income/(loss)		4.51	(26.52)	[1]	(10.93)	[1]
Net asset value		$ 154.43	$ 149.92	[1]	$ 165.51	[1]
Net investment income/(loss)		(4.99%)	(9.49%)		(6.52%)
Expenses before incentive fees	[2],[3]	4.99%	9.49%		6.52%
Expenses after incentive fees	[2],[3]	4.99%	9.49%		6.52%
Total return before incentive fee	[4]	3.01%	(15.03%)		(6.19%)
Total return after incentive fees	[4]	3.01%	(15.03%)		(6.19%)
Frontier Heritage Fund [Member] | Class 1 [Member]
Net asset value	[1]	$ 99.83	$ 101.09		$ 121.19
Interest income		0	0	[1]	0	[1]
Expenses		(6.90)	(10.86)	[1]	(6.79)	[1]
Net gain/(loss) on investments, net of non-controlling interests		4.61	(10.50)	[1]	(13.31)	[1]
Net income/(loss)		(2.29)	(21.36)	[1]	(20.10)	[1]
Net asset value		$ 97.54	$ 99.83	[1]	$ 101.09	[1]
Net investment income/(loss)		(6.71%)	(11.85%)		(8.46%)
Expenses before incentive fees	[2],[3]	6.71%	11.84%		8.44%
Expenses after incentive fees	[2],[3]	6.71%	11.85%		8.46%
Total return before incentive fee	[4]	(2.30%)	(17.61%)		(16.56%)
Total return after incentive fees	[4]	(2.30%)	(17.63%)		(16.59%)
Frontier Heritage Fund [Member] | Class 2 [Member]
Net asset value	[1]	$ 152.53	$ 153.31		$ 179.70
Interest income		0	0	[1]	0	[1]
Expenses		(5.93)	(11.58)	[1]	(6.56)	[1]
Net gain/(loss) on investments, net of non-controlling interests		7	(15.59)	[1]	(19.83)	[1]
Net income/(loss)		1.06	(27.17)	[1]	(26.39)	[1]
Net asset value		$ 153.59	$ 152.53	[1]	$ 153.31	[1]
Net investment income/(loss)		(3.70%)	(7.84%)		(5.47%)
Expenses before incentive fees	[2],[3]	3.70%	7.83%		5.44%
Expenses after incentive fees	[2],[3]	3.70%	7.84%		5.47%
Total return before incentive fee	[4]	0.70%	(15.11%)		(14.66%)
Total return after incentive fees	[4]	0.70%	(15.12%)		(14.69%)
Frontier Heritage Fund [Member] | Class 1AP [Member]
Net asset value	[1]	$ 111.78	$ 114.58		$ 134.28
Interest income		0	0	[1]	0	[1]
Expenses		(4.62)	(8.95)	[1]	(5)	[1]
Net gain/(loss) on investments, net of non-controlling interests		7	(13.55)	[1]	(14.70)	[1]
Net income/(loss)		2.37	(22.50)	[1]	(19.70)	[1]
Net asset value		$ 114.15	$ 111.78	[1]	$ 114.58	[1]
Net investment income/(loss)		(3.70%)	(7.84%)		(5.47%)
Expenses before incentive fees	[2],[3]	3.70%	7.83%		5.44%
Expenses after incentive fees	[2],[3]	3.70%	7.84%		5.47%
Total return before incentive fee	[4]	2.12%	(16.74%)		(14.64%)
Total return after incentive fees	[4]	2.12%	(16.76%)		(14.67%)
[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]	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.
[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]	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.

Financial Highlights ( Frontier

Financial Highlights ( Frontier Funds) (Details 1) - Frontier Funds [Member]		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net investment gain/(loss)	[1]	(5.54%)	(6.27%)	(5.50%)	(6.70%)
Expenses before incentive fees	[1],[2]	(5.71%)	(6.37%)	4.48%	4.90%
Expenses after incentive fees	[1],[2]	(5.71%)	(6.52%)	5.75%	7.10%
Total return before incentive fees	[3]	(1.89%)	(16.86%)	3.62%	0.60%
Total return after incentive fees	[3]	(1.89%)	(17.01%)	2.35%	(1.60%)
[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_3

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details) - The Series of the Frontier Funds [Member] - Number	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Frontier Balanced Fund [Member]
Derivative Numbers of Instruments Bought	1,209	2,183	1,070
Derivative Numbers of Instruments Sold	1,409	1,971	1,008
Frontier Select Fund [Member]
Derivative Numbers of Instruments Bought			4,019
Derivative Numbers of Instruments Sold			4,191
Frontier Global Fund (formerly Winton Fund) [Member]
Derivative Numbers of Instruments Bought			1,998
Derivative Numbers of Instruments Sold			1,980

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 1) - The Series of the Frontier Funds [Member] - Realized Trading Revenue from Futures, Forwards and Options [Member] - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock indices [Member]
Realized trading income/(loss)	[1]			$ 4,430,276
Frontier Balanced Fund [Member]
Realized trading income/(loss)	[1]	$ 135,528	$ (376,937)	(381,817)
Frontier Balanced Fund [Member] | Agriculturals [Member]
Realized trading income/(loss)		230,294	(20,839)	(551,945)
Frontier Balanced Fund [Member] | Currencies [Member]
Realized trading income/(loss)		(104,139)	(374,202)	131,422
Frontier Balanced Fund [Member] | Energies [Member]
Realized trading income/(loss)		124,324	74,850	108,921
Frontier Balanced Fund [Member] | Interest rates [Member]
Realized trading income/(loss)		(43,735)	(62,765)	(381,197)
Frontier Balanced Fund [Member] | Metals [Member]
Realized trading income/(loss)		(71,367)	11,010	(134,275)
Frontier Balanced Fund [Member] | Stock indices [Member]
Realized trading income/(loss)		$ 151	$ (4,991)	445,257
Frontier Select Fund [Member]
Realized trading income/(loss)	[1]			(148,184)
Frontier Select Fund [Member] | Agriculturals [Member]
Realized trading income/(loss)				162,919
Frontier Select Fund [Member] | Currencies [Member]
Realized trading income/(loss)				(290,393)
Frontier Select Fund [Member] | Energies [Member]
Realized trading income/(loss)				(485,509)
Frontier Select Fund [Member] | Interest rates [Member]
Realized trading income/(loss)				(894,051)
Frontier Select Fund [Member] | Metals [Member]
Realized trading income/(loss)				(143,520)
Frontier Select Fund [Member] | Stock indices [Member]
Realized trading income/(loss)				1,502,370
Frontier Winton Fund [Member] | Agriculturals [Member]
Realized trading income/(loss)				727,130
Frontier Winton Fund [Member] | Currencies [Member]
Realized trading income/(loss)				(1,676,434)
Frontier Winton Fund [Member] | Energies [Member]
Realized trading income/(loss)				(1,185,513)
Frontier Winton Fund [Member] | Interest rates [Member]
Realized trading income/(loss)				(1,522,362)
Frontier Winton Fund [Member] | Metals [Member]
Realized trading income/(loss)				(1,595,961)
Frontier Winton Fund [Member] | Stock indices [Member]
Realized trading income/(loss)				$ 9,683,416
[1]	Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options.

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 2) - The Series of the Frontier Funds [Member] - Unrealized Trading Revenue from Futures, Forwards and Options [Member] - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Frontier Balanced Fund [Member]
Change in unrealized trading income/(loss)	[1]	$ (133,880)	$ 14,335	$ (56,728)
Frontier Balanced Fund [Member] | Agriculturals [Member]
Change in unrealized trading income/(loss)		(37,494)	(16,846)	(59,986)
Frontier Balanced Fund [Member] | Currencies [Member]
Change in unrealized trading income/(loss)		(127,586)	(124,436)	85,174
Frontier Balanced Fund [Member] | Energies [Member]
Change in unrealized trading income/(loss)		9,624	(73,724)	78,514
Frontier Balanced Fund [Member] | Interest rates [Member]
Change in unrealized trading income/(loss)		(4,922)	207,810	(50,861)
Frontier Balanced Fund [Member] | Metals [Member]
Change in unrealized trading income/(loss)		26,498	14,424	(115,993)
Frontier Balanced Fund [Member] | Stock indices [Member]
Change in unrealized trading income/(loss)			$ 7,107	6,424
Frontier Select Fund [Member]
Change in unrealized trading income/(loss)	[1]			(686,022)
Frontier Select Fund [Member] | Agriculturals [Member]
Change in unrealized trading income/(loss)				(26,685)
Frontier Select Fund [Member] | Currencies [Member]
Change in unrealized trading income/(loss)				(151,187)
Frontier Select Fund [Member] | Energies [Member]
Change in unrealized trading income/(loss)				(176,868)
Frontier Select Fund [Member] | Interest rates [Member]
Change in unrealized trading income/(loss)				(214,247)
Frontier Select Fund [Member] | Metals [Member]
Change in unrealized trading income/(loss)				(57,373)
Frontier Select Fund [Member] | Stock indices [Member]
Change in unrealized trading income/(loss)				(59,662)
Frontier Winton Fund [Member]
Change in unrealized trading income/(loss)	[1]			(922,290)
Frontier Winton Fund [Member] | Agriculturals [Member]
Change in unrealized trading income/(loss)				6,743
Frontier Winton Fund [Member] | Currencies [Member]
Change in unrealized trading income/(loss)				(565,953)
Frontier Winton Fund [Member] | Energies [Member]
Change in unrealized trading income/(loss)				124,997
Frontier Winton Fund [Member] | Interest rates [Member]
Change in unrealized trading income/(loss)				(110,137)
Frontier Winton Fund [Member] | Metals [Member]
Change in unrealized trading income/(loss)				20,454
Frontier Winton Fund [Member] | Stock indices [Member]
Change in unrealized trading income/(loss)				$ (398,394)
[1]	Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities (The Series of the Frontier Funds) (Details 3) - The Series of the Frontier Funds [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Frontier Balanced Fund [Member] | Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 154,778	$ 348,879
Gross Amounts offset in the Statements of Financial	(38,594)	(128,220)
Net Amounts Presented in the Statements of Financial Condition	116,184	220,659
Frontier Balanced Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	11,944,753	10,794,908
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	11,944,753	10,794,908
Frontier Diversified Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	6,384,583	5,920,414
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	6,384,583	5,920,414
Frontier Long/Short Commodity Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	362,521	479,102
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	362,521	479,102
Frontier Heritage Fund [Member] | Swap Contracts [Member]
Gross Amounts of recognized Derivative Assets	2,888,009	2,955,444
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 2,888,009	$ 2,955,444

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities (Frontier Funds) (Details) - Frontier Fund [Member] - Realized Trading Revenue from Futures, Forwards and Options [Member] - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Realized trading income/(loss)	[1]	$ (1,221,224)	$ 681,514	$ 3,791,851
Agriculturals [Member]
Realized trading income/(loss)		215,822	147,573	308,770
Currencies [Member]
Realized trading income/(loss)		(553,764)	(1,078,570)	(1,881,971)
Energies [Member]
Realized trading income/(loss)		(430,890)	1,399,946	(1,506,874)
Interest rates [Member]
Realized trading income/(loss)		273,302	54,450	(2,849,356)
Metals [Member]
Realized trading income/(loss)		(691,581)	752,938	(1,881,246)
Stock indices [Member]
Realized trading income/(loss)		$ (34,113)	$ (594,823)	$ 11,602,528
[1]	Amounts recorded in the Statements of Operations under Net realized gain(loss) on futures forwards and options.

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities (Frontier Funds) (Details 1) - Frontier Fund [Member] - Net Change in Open Trade Equity from Futures, Forwards and Options [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Change in unrealized trading income/(loss)	$ 568,784	[1]	$ (2,144,664)	[1]	$ (355,207)	[2]
Agriculturals [Member]
Change in unrealized trading income/(loss)	(92,782)		494,997		(213,814)
Currencies [Member]
Change in unrealized trading income/(loss)	100,545		(682,646)		(280,451)
Energies [Member]
Change in unrealized trading income/(loss)	221,904		(642,839)		328,180
Interest rates [Member]
Change in unrealized trading income/(loss)	(231,584)		(1,035,591)		(524,406)
Metals [Member]
Change in unrealized trading income/(loss)	516,390		(83,504)		556,638
Stock indices [Member]
Change in unrealized trading income/(loss)	$ 54,311		$ (195,081)		$ (221,354)
[1]	Amounts recorded in the Statements of Operations under Net change in open trade equity/(deficit).
[2]	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 (Frontier Funds) (Details 2) - Frontier Fund [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Open Trade Equity/(Deficit) [Member]
Gross Amounts of recognized Derivative Assets	$ 154,778	$ 3,244,057
Gross Amounts offset in the Statements of Financial	(38,594)	(3,642,246)
Net Amounts Presented in the Statements of Financial Condition	116,184	(398,189)
Swap [Member]
Gross Amounts of recognized Derivative Assets	21,579,866	20,149,868
Gross Amounts offset in the Statements of Financial
Net Amounts Presented in the Statements of Financial Condition	$ 21,579,866	$ 20,149,868

Derivative Instruments and H_10

Derivative Instruments and Hedging Activities (Frontier Funds) (Details Textual) - Frontier Fund [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
Monthly average of forwards, options and futures contracts bought	$ 1,321	$ 2,684	$ 7,078
Monthly average of forwards, options and futures contracts sold	$ 1,515	$ 2,482	$ 7,179
Minimum [Member]
Derivative Instruments and Hedging Activities (Frontier Funds) (Textual)
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 (Frontier Funds) (Textual)
Percentage of embedded management fees	1.50%	1.50%
Percentage of fair value of swaps and embedded incentive fees	25.00%	25.00%

Trading Activities and Relate_2

Trading Activities and Related Risks (The Series of the Frontier Funds) (Details)	12 Months Ended
	Dec. 31, 2019
The Series of the Frontier Funds [Member]
Trading Activities and Related Risks (Textual)
Trading activities and related risks ,description	If the markets should move against all of the futures positions held by a Trading Company in respect of any Series at the same time, and if the Trading Advisor(s) of such Trading Company are unable to offset such futures interests positions, such Trading Company 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.

Trading Activities and Relate_3

Trading Activities and Related Risks (Frontier Funds) (Details)	12 Months Ended
	Dec. 31, 2019
Frontier Fund [Member]
Trading Activities and Related Risks (Frontier Funds) (Textual)
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.