v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000122820 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000122820 [Member] | US Treasury Bill Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000122820 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.10%
C000122820 [Member] | U S Government Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.20%
C000122820 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [1]
C000122820 [Member] | Long Commodities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 100.00% [2]
C000168150 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000168150 [Member] | US Treasury Bill Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
C000168150 [Member] | Money Market Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.70%
C000168150 [Member] | U S Government Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 53.00%
C000168150 [Member] | Net Other Assets and Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (3.90%) [3]
C000168150 [Member] | Long Commodities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 72.80% [4]
C000168150 [Member] | Short Commodities [Member]  
Holdings [Line Items]  
Percent of Total Short Exposure (27.20%) [4]
[1] Includes variation margin on futures contracts.
[2] Futures exposure is calculated on the notional value as a percentage of total notional exposure.
[3] Includes variation margin on futures contracts.
[4] Futures exposure is calculated on the notional value as a percentage of total notional exposure.