Fund Investment Overview	6 Months Ended
Jun. 30, 2014
Accounting Policies [Abstract]
Fund Investment Overview	(2) Fund Investment Overview The Fund invests with a view to tracking the changes, whether positive or negative, in the level of the DBIQ Optimum Yield Energy Index Excess Return™ (“DBIQ-OY Energy ER™”, or the “Index”) plus the excess, if any, of the Fund’s interest income from its holdings of United States Treasury Obligations and other high credit quality short-term fixed income securities over the expenses of the Fund. The Index is intended to reflect the change in market value of the energy sector. The commodities comprising the Index are light sweet crude oil, heating oil, brent crude oil, RBOB gasoline and natural gas (the “Index Commodities”). The Commodity Futures Trading Commission (the “CFTC”) and/or commodity exchanges, as applicable, impose position limits on market participants trading in certain commodities futures contracts included in the Index. The Index is comprised of futures contracts on the Index Commodities that expire in a specific month and trade on a specific exchange (the “Index Contracts”). If the Managing Owner determines in its commercially reasonable judgment that it has become impracticable or inefficient for any reason for the Fund to gain full or partial exposure to any Index Commodity by investing in a specific Index Contract, the Fund may invest in a futures contract referencing the particular Index Commodity other than the Index Contract or, in the alternative, invest in other futures contracts not based on the particular Index Commodity if, in the commercially reasonable judgment of the Managing Owner, such futures contracts tend to exhibit trading prices that correlate with such Index Commodity. The Fund reached accountability levels prior to January 2, 2013 with respect to RBOB Gasoline and continued to remain subject to such levels as of June 30, 2013. As a result of reaching the accountability levels with respect to RBOB Gasoline, the Fund invested in the next sequential expiring RBOB Gasoline futures contracts also listed on the NYMEX during the period from January 2, 2013 to October 4, 2013. The Fund also holds United States Treasury Obligations for deposit with the Fund’s commodity broker as margin. The Fund does not borrow money to increase leverage. As of June 30, 2014 and December 31, 2013, the Fund had $399,832,379 (or 100%) and $299,455,287 (or 100%), respectively, of its holdings of cash, United States Treasury Obligations and unrealized appreciation/depreciation on futures contracts on deposit with its Commodity Broker. Of this, $10,993,620 (or 2.8%) and $9,318,925 (or 3.1%), respectively, of the Fund’s holdings of cash and United States Treasury Obligations are required to be deposited as margin in support of the Fund’s long futures positions as of June 30, 2014 and December 31, 2013, respectively. For additional information, please see the unaudited Schedule of Investments as of June 30, 2014 and the audited Schedule of Investments as of December 31, 2013 for details of the Fund’s portfolio holdings. DBIQ™, DBLCI™ and Deutsche Bank Liquid Commodity Index™ are trademarks of Deutsche Bank AG London (the “Index Sponsor”).Trademark applications in the United States are pending with respect to the Trust, the Fund and aspects of the Index. Any use of these trademarks must be with the consent of or under license from the Index Sponsor. The Trust, the Fund and the Managing Owner have been licensed by the Index Sponsor to use the above noted trademarks. The Index Sponsor is an affiliate of the Trust, the Fund and the Managing Owner.

(2) Fund Investment Overview

The Fund invests with a view to tracking the changes, whether positive or negative, in the level of the DBIQ Optimum Yield Energy Index Excess Return™ (“DBIQ-OY Energy ER™”, or the “Index”) plus the excess, if any, of the Fund’s interest income from its holdings of United States Treasury Obligations and other high credit quality short-term fixed income securities over the expenses of the Fund.

The Index is intended to reflect the change in market value of the energy sector. The commodities comprising the Index are light sweet crude oil, heating oil, brent crude oil, RBOB gasoline and natural gas (the “Index Commodities”).

The Commodity Futures Trading Commission (the “CFTC”) and/or commodity exchanges, as applicable, impose position limits on market participants trading in certain commodities futures contracts included in the Index. The Index is comprised of futures contracts on the Index Commodities that expire in a specific month and trade on a specific exchange (the “Index Contracts”). If the Managing Owner determines in its commercially reasonable judgment that it has become impracticable or inefficient for any reason for the Fund to gain full or partial exposure to any Index Commodity by investing in a specific Index Contract, the Fund may invest in a futures contract referencing the particular Index Commodity other than the Index Contract or, in the alternative, invest in other futures contracts not based on the particular Index Commodity if, in the commercially reasonable judgment of the Managing Owner, such futures contracts tend to exhibit trading prices that correlate with such Index Commodity.

The Fund reached accountability levels prior to January 2, 2013 with respect to RBOB Gasoline and continued to remain subject to such levels as of June 30, 2013. As a result of reaching the accountability levels with respect to RBOB Gasoline, the Fund invested in the next sequential expiring RBOB Gasoline futures contracts also listed on the NYMEX during the period from January 2, 2013 to October 4, 2013.

The Fund also holds United States Treasury Obligations for deposit with the Fund’s commodity broker as margin. The Fund does not borrow money to increase leverage. As of June 30, 2014 and December 31, 2013, the Fund had $399,832,379 (or 100%) and $299,455,287 (or 100%), respectively, of its holdings of cash, United States Treasury Obligations and unrealized appreciation/depreciation on futures contracts on deposit with its Commodity Broker. Of this, $10,993,620 (or 2.8%) and $9,318,925 (or 3.1%), respectively, of the Fund’s holdings of cash and United States Treasury Obligations are required to be deposited as margin in support of the Fund’s long futures positions as of June 30, 2014 and December 31, 2013, respectively. For additional information, please see the unaudited Schedule of Investments as of June 30, 2014 and the audited Schedule of Investments as of December 31, 2013 for details of the Fund’s portfolio holdings.

DBIQ™, DBLCI™ and Deutsche Bank Liquid Commodity Index™ are trademarks of Deutsche Bank AG London (the “Index Sponsor”).Trademark applications in the United States are pending with respect to the Trust, the Fund and aspects of the Index. Any use of these trademarks must be with the consent of or under license from the Index Sponsor. The Trust, the Fund and the Managing Owner have been licensed by the Index Sponsor to use the above noted trademarks. The Index Sponsor is an affiliate of the Trust, the Fund and the Managing Owner.