Schedule of Investments (Unaudited) - Futures Contracts		9 Months Ended	12 Months Ended
		Sep. 30, 2020 USD ($) Contract	Dec. 31, 2019 USD ($) Contract
Schedule of Investments [Line Items]
Investments in Securities, Value		$ 1,018,778,966	$ 1,432,745,979
Futures [Member] | Long [Member]
Schedule of Investments [Line Items]
Investments in Securities, Value	[1]	456,229	47,694,395
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 456,229	$ 47,694,395
Futures [Member] | Long [Member] | CBOT Corn [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		3,066	3,905
Commodity Futures Contracts, Expiration Date		Sep. 30, 2021	Sep. 30, 2020
Commodity Futures Contracts, Notional Value		$ 59,518,725	$ 78,295,250
Investments in Securities, Value	[1]	5,047,527	(3,026,104)
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 5,047,527	$ (3,026,104)
Futures [Member] | Long [Member] | CBOT Soybean [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		1,437	1,602
Commodity Futures Contracts, Expiration Date		Nov. 30, 2020	Nov. 30, 2020
Commodity Futures Contracts, Notional Value		$ 73,538,475	$ 78,397,875
Investments in Securities, Value	[1]	5,249,318	1,276,086
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 5,249,318	$ 1,276,086
Futures [Member] | Long [Member] | CBOT Wheat [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		2,502	2,954
Commodity Futures Contracts, Expiration Date		Jul. 31, 2021	Jul. 31, 2020
Commodity Futures Contracts, Notional Value		$ 72,808,200	$ 83,228,950
Investments in Securities, Value	[1]	6,822,380	3,287,335
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 6,822,380	$ 3,287,335
Futures [Member] | Long [Member] | CME SWAPS MARKETS (COMEX) Gold [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		659	749
Commodity Futures Contracts, Expiration Date		Feb. 28, 2021	Feb. 29, 2020
Commodity Futures Contracts, Notional Value		$ 125,381,340	$ 114,080,190
Investments in Securities, Value	[1]	16,014,286	14,071,689
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 16,014,286	$ 14,071,689
Futures [Member] | Long [Member] | CME SWAPS MARKETS (COMEX) Silver [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		286	323
Commodity Futures Contracts, Expiration Date		May 31, 2021	May 31, 2020
Commodity Futures Contracts, Notional Value		$ 33,925,320	$ 29,084,535
Investments in Securities, Value	[1]	9,613,168	3,636,158
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 9,613,168	$ 3,636,158
Futures [Member] | Long [Member] | ICE FUTURES EUROPE Brent Crude Oil [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		2,520	2,802
Commodity Futures Contracts, Expiration Date		Nov. 30, 2020	Jan. 31, 2020
Commodity Futures Contracts, Notional Value		$ 107,730,000	$ 184,932,000
Investments in Securities, Value	[1]	(25,750,590)	10,124,770
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (25,750,590)	$ 10,124,770
Futures [Member] | Long [Member] | LME CLEAR Aluminum [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		1,058	1,259
Commodity Futures Contracts, Expiration Date		May 31, 2021	Apr. 30, 2020
Commodity Futures Contracts, Notional Value		$ 47,457,913	$ 57,111,388
Investments in Securities, Value	[1]	5,223,855	1,559,850
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 5,223,855	$ 1,559,850
Futures [Member] | Long [Member] | LME CLEAR Copper [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		341	386
Commodity Futures Contracts, Expiration Date		May 31, 2021	Jun. 30, 2020
Commodity Futures Contracts, Notional Value		$ 56,929,950	$ 59,694,900
Investments in Securities, Value	[1]	10,312,850	4,507,945
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 10,312,850	$ 4,507,945
Futures [Member] | Long [Member] | LME CLEAR Zinc [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		811	924
Commodity Futures Contracts, Expiration Date		Aug. 31, 2021	Mar. 31, 2020
Commodity Futures Contracts, Notional Value		$ 49,420,312	$ 52,546,725
Investments in Securities, Value	[1]	5,437,181	1,010,894
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 5,437,181	$ 1,010,894
Futures [Member] | Long [Member] | ICE FUTURES U.S. Sugar [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		4,623	5,329
Commodity Futures Contracts, Expiration Date		Sep. 30, 2021	Sep. 30, 2020
Commodity Futures Contracts, Notional Value		$ 66,171,773	$ 82,842,502
Investments in Securities, Value	[1]	1,372,501	7,476,859
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 1,372,501	$ 7,476,859
Futures [Member] | Long [Member] | CME SWAPS MARKETS (NYMEX) Natural Gas [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		2,027	3,161
Commodity Futures Contracts, Expiration Date		Apr. 30, 2021	Apr. 30, 2020
Commodity Futures Contracts, Notional Value		$ 55,701,960	$ 69,162,680
Investments in Securities, Value	[1]	6,443,407	(12,073,446)
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 6,443,407	$ (12,073,446)
Futures [Member] | Long [Member] | CME SWAPS MARKETS (NYMEX) NY Harbor ULSD [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		1,484	2,184
Commodity Futures Contracts, Expiration Date		May 31, 2021	May 31, 2020
Commodity Futures Contracts, Notional Value		$ 76,756,932	$ 180,823,407
Investments in Securities, Value	[1]	4,077,542	(4,811,899)
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 4,077,542	$ (4,811,899)
Futures [Member] | Long [Member] | CME SWAPS MARKETS (NYMEX) RBOB Gasoline [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		2,378	2,649
Commodity Futures Contracts, Expiration Date		Nov. 30, 2020	Nov. 30, 2020
Commodity Futures Contracts, Notional Value		$ 116,375,515	$ 176,221,546
Investments in Securities, Value	[1]	(29,134,832)	6,030,558
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (29,134,832)	$ 6,030,558
Futures [Member] | Long [Member] | CME SWAPS MARKETS (NYMEX) WTI Crude Oil [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		2,671	3,000
Commodity Futures Contracts, Expiration Date		Feb. 28, 2021	Feb. 29, 2020
Commodity Futures Contracts, Notional Value		$ 110,766,370	$ 182,310,000
Investments in Securities, Value	[1]	(20,272,364)	14,623,700
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (20,272,364)	$ 14,623,700

[1] Unrealized Appreciation (Depreciation) and Value are presented above, net by contract.