Schedule of Investments (Unaudited) - Futures Contracts		3 Months Ended	12 Months Ended
		Mar. 31, 2020 USD ($) Contract	Dec. 31, 2019 USD ($) Contract
Schedule of Investments [Line Items]
Investments in Securities, Value		$ 759,902,645	$ 1,432,745,979
Futures [Member] | Long [Member]
Schedule of Investments [Line Items]
Investments in Securities, Value	[1]	(270,891,373)	47,694,395
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (270,891,373)	$ 47,694,395
Futures [Member] | Long [Member] | CBOT Corn [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		3,021	3,905
Commodity Futures Contracts, Expiration Date		Sep. 30, 2020	Sep. 30, 2020
Commodity Futures Contracts, Notional Value		$ 52,829,737	$ 78,295,250
Investments in Securities, Value	[1]	(9,882,840)	(3,026,104)
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (9,882,840)	$ (3,026,104)
Futures [Member] | Long [Member] | CBOT Soybean [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		1,237	1,602
Commodity Futures Contracts, Expiration Date		Nov. 30, 2020	Nov. 30, 2020
Commodity Futures Contracts, Notional Value		$ 54,273,375	$ 78,397,875
Investments in Securities, Value	[1]	(5,295,744)	1,276,086
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (5,295,744)	$ 1,276,086
Futures [Member] | Long [Member] | CBOT Wheat [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		2,284	2,954
Commodity Futures Contracts, Expiration Date		Jul. 31, 2020	Jul. 31, 2020
Commodity Futures Contracts, Notional Value		$ 64,237,500	$ 83,228,950
Investments in Securities, Value	[1]	2,152,865	3,287,335
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 2,152,865	$ 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		567	749
Commodity Futures Contracts, Expiration Date		Feb. 28, 2021	Feb. 29, 2020
Commodity Futures Contracts, Notional Value		$ 90,640,620	$ 114,080,190
Investments in Securities, Value	[1]	153,123	14,071,689
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 153,123	$ 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		250	323
Commodity Futures Contracts, Expiration Date		May 31, 2020	May 31, 2020
Commodity Futures Contracts, Notional Value		$ 17,695,000	$ 29,084,535
Investments in Securities, Value	[1]	(2,144,753)	3,636,158
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (2,144,753)	$ 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		2,171	2,802
Commodity Futures Contracts, Expiration Date		Nov. 30, 2020	Jan. 31, 2020
Commodity Futures Contracts, Notional Value		$ 81,586,180	$ 184,932,000
Investments in Securities, Value	[1]	(37,953,333)	10,124,770
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (37,953,333)	$ 10,124,770
Futures [Member] | Long [Member] | LME CLEAR Aluminum [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		973	1,259
Commodity Futures Contracts, Expiration Date		May 31, 2020	Apr. 30, 2020
Commodity Futures Contracts, Notional Value		$ 36,834,131	$ 57,111,388
Investments in Securities, Value	[1]	(4,581,750)	1,559,850
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (4,581,750)	$ 1,559,850
Futures [Member] | Long [Member] | LME CLEAR Copper [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		298	386
Commodity Futures Contracts, Expiration Date		Jun. 30, 2020	Jun. 30, 2020
Commodity Futures Contracts, Notional Value		$ 36,883,088	$ 59,694,900
Investments in Securities, Value	[1]	(5,863,817)	4,507,945
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (5,863,817)	$ 4,507,945
Futures [Member] | Long [Member] | LME CLEAR Zinc [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		715	924
Commodity Futures Contracts, Expiration Date		Jun. 30, 2020	Mar. 31, 2020
Commodity Futures Contracts, Notional Value		$ 34,047,406	$ 52,546,725
Investments in Securities, Value	[1]	(4,774,456)	1,010,894
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (4,774,456)	$ 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		4,119	5,329
Commodity Futures Contracts, Expiration Date		Sep. 30, 2020	Sep. 30, 2020
Commodity Futures Contracts, Notional Value		$ 49,638,893	$ 82,842,502
Investments in Securities, Value	[1]	(8,843,536)	7,476,859
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (8,843,536)	$ 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		2,444	3,161
Commodity Futures Contracts, Expiration Date		Apr. 30, 2020	Apr. 30, 2020
Commodity Futures Contracts, Notional Value		$ 40,081,600	$ 69,162,680
Investments in Securities, Value	[1]	(22,281,694)	(12,073,446)
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (22,281,694)	$ (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		1,689	2,184
Commodity Futures Contracts, Expiration Date		May 31, 2020	May 31, 2020
Commodity Futures Contracts, Notional Value		$ 72,186,509	$ 180,823,407
Investments in Securities, Value	[1]	(70,441,986)	(4,811,899)
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (70,441,986)	$ (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		2,047	2,649
Commodity Futures Contracts, Expiration Date		Nov. 30, 2020	Nov. 30, 2020
Commodity Futures Contracts, Notional Value		$ 67,309,045	$ 176,221,546
Investments in Securities, Value	[1]	(65,078,521)	6,030,558
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (65,078,521)	$ 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		2,302	3,000
Commodity Futures Contracts, Expiration Date		Feb. 28, 2021	Feb. 29, 2020
Commodity Futures Contracts, Notional Value		$ 80,800,200	$ 182,310,000
Investments in Securities, Value	[1]	(36,054,931)	14,623,700
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (36,054,931)	$ 14,623,700

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