Invesco DB Commodity Index Tracking Fund (DBC) 10-K 2 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	DBC
Entity Registrant Name	PowerShares DB Commodity Index Tracking Fund
Entity Central Index Key	1328237
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		214,400,000
Entity Public Float			$5,656,224,000

Statements_of_Financial_Condit

Statements of Financial Condition (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets
United States Treasury Obligations, at fair value (cost $4,977,810,659 and $6,639,473,280 respectively)	$4,977,853,691	$6,639,612,594
Cash held by commodity broker	745,587,142	123,072,778
Net unrealized appreciation (depreciation) on commodity futures contracts	-775,157,664	37,252,674
Equity in broker trading accounts (of which $272,407,319 and $297,808,276, respectively, is restricted for maintenance margin purposes)	4,948,283,169	6,799,938,046
Total assets	4,948,283,169	6,799,938,046
Liabilities
Payable for securities purchased	898,921,337	1,088,821,071
Payable for LME contracts	9,890,331	10,356,375
Management fee payable	3,042,481	4,283,639
Brokerage fee payable	4,575	1,465
Total liabilities	911,858,724	1,103,462,550
Commitments and Contingencies (Note 9)
Equity
Shareholders' equity-General Shares	736	1,024
Shareholders' equity-Shares	4,036,423,709	5,696,474,472
Total shareholders' equity	4,036,424,445	5,696,475,496
Total liabilities and equity	$4,948,283,169	$6,799,938,046
General Shares outstanding	40	40
Shares outstanding	219,400,000	222,400,000
Net asset value per share
General Shares	$18.40	$25.61
Shares	$18.40	$25.61

Statements_of_Financial_Condit1

Statements of Financial Condition (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Restricted investments	$272,407,319	$297,808,276
United States Treasury Obligations [Member]
United States Treasury Obligations, cost	$4,977,810,659	$6,639,473,280

Schedule_of_Investments_Treasu

Schedule of Investments - Treasury Bills (USD $)	Dec. 31, 2014	Dec. 31, 2013
Schedule of Investments [Line Items]
Fair Value	$4,977,853,691	$6,639,612,594
U.S. Treasury Bills, 0.030% due January 2, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	22.27%
Fair Value	899,000,000
Face Value	899,000,000
U.S. Treasury Bills, 0.040% due January 8, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	4.58%
Fair Value	184,999,815
Face Value	185,000,000
U.S. Treasury Bills, 0.020% due January 15, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.32%
Fair Value	12,999,909
Face Value	13,000,000
U.S. Treasury Bills, 0.010% due January 22, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	27.80%
Fair Value	1,121,984,292
Face Value	1,122,000,000
U.S. Treasury Bills, 0.015% due January 29, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	4.78%
Fair Value	192,997,105
Face Value	193,000,000
U.S. Treasury Bills, 0.010% due February 5, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.40%
Fair Value	15,999,696
Face Value	16,000,000
U.S. Treasury Bills, 0.025% due February 12, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.35%
Fair Value	13,999,804
Face Value	14,000,000
U.S. Treasury Bills, 0.020% due February 26, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	3.62%
Fair Value	145,996,642
Face Value	146,000,000
U.S. Treasury Bills, 0.025% due March 5, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	13.45%
Fair Value	542,988,054
Face Value	543,000,000
U.S. Treasury Bills, 0.025% due March 12, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	13.57%
Fair Value	547,979,176
Face Value	548,000,000
U.S. Treasury Bills, 0.035% due March 19, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.74%
Fair Value	29,999,040
Face Value	30,000,000
U.S. Treasury Bills, 0.055% due March 26, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	9.17%
Fair Value	369,989,270
Face Value	370,000,000
U.S. Treasury Bills, 0.040% due April 2, 2015 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	22.27%
Fair Value	898,920,888
Face Value	899,000,000
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	123.32%	116.56%
Fair Value	4,977,853,691	6,639,612,594
U.S. Treasury Bills, 0.030% due January 2, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		18.59%
Fair Value		1,059,000,000
Face Value		1,059,000,000
U.S. Treasury Bills, 0.005% due January 23, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		29.69%
Fair Value		1,690,988,163
Face Value		1,691,000,000
U.S. Treasury Bills, 0.005% due January 30, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		10.23%
Fair Value		582,994,170
Face Value		583,000,000
U.S. Treasury Bills, 0.05% due February 6, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.35%
Fair Value		19,999,820
Face Value		20,000,000
U.S. Treasury Bills, 0.075% due February 13, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.12%
Fair Value		6,999,937
Face Value		7,000,000
U.S. Treasury Bills, 0.080% due February 20, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.97%
Fair Value		54,998,680
Face Value		55,000,000
U.S. Treasury Bills, 0.080% due February 27, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		4.41%
Fair Value		250,992,219
Face Value		251,000,000
U.S. Treasury Bills, 0.075% due March 6, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		11.09%
Fair Value		631,947,544
Face Value		632,000,000
U.S. Treasury Bills, 0.070% due March 13, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		11.32%
Fair Value		644,956,140
Face Value		645,000,000
U.S. Treasury Bills, 0.065% due March 20, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		4.11%
Fair Value		233,972,388
Face Value		234,000,000
U.S. Treasury Bills, 0.070% due March 27, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		6.57%
Fair Value		373,945,396
Face Value		374,000,000
U.S. Treasury Bills, 0.065% due April 3, 2014 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		19.11%
Fair Value		1,088,818,137
Face Value		$1,089,000,000

Schedule_of_Investments_Treasu1

Schedule of Investments - Treasury Bills (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
U.S. Treasury Bills, 0.030% due January 2, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	2-Jan-15
Investment Interest Rate	0.03%
U.S. Treasury Bills, 0.040% due January 8, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	8-Jan-15
Investment Interest Rate	0.04%
U.S. Treasury Bills, 0.020% due January 15, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	15-Jan-15
Investment Interest Rate	0.02%
U.S. Treasury Bills, 0.010% due January 22, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	22-Jan-15
Investment Interest Rate	0.01%
U.S. Treasury Bills, 0.015% due January 29, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	29-Jan-15
Investment Interest Rate	0.02%
U.S. Treasury Bills, 0.010% due February 5, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	5-Feb-15
Investment Interest Rate	0.01%
U.S. Treasury Bills, 0.025% due February 12, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	12-Feb-15
Investment Interest Rate	0.03%
U.S. Treasury Bills, 0.020% due February 26, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	26-Feb-15
Investment Interest Rate	0.02%
U.S. Treasury Bills, 0.025% due March 5, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	5-Mar-15
Investment Interest Rate	0.03%
U.S. Treasury Bills, 0.025% due March 12, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	12-Mar-15
Investment Interest Rate	0.03%
U.S. Treasury Bills, 0.035% due March 19, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	19-Mar-15
Investment Interest Rate	0.04%
U.S. Treasury Bills, 0.055% due March 26, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	26-Mar-15
Investment Interest Rate	0.06%
U.S. Treasury Bills, 0.040% due April 2, 2015 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date	2-Apr-15
Investment Interest Rate	0.04%
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
United States Treasury Obligations, cost	4,977,810,659	6,639,473,280
U.S. Treasury Bills, 0.030% due January 2, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		2-Jan-14
Investment Interest Rate		0.03%
U.S. Treasury Bills, 0.005% due January 23, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		23-Jan-14
Investment Interest Rate		0.01%
U.S. Treasury Bills, 0.005% due January 30, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		30-Jan-14
Investment Interest Rate		0.01%
U.S. Treasury Bills, 0.05% due February 6, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		6-Feb-14
Investment Interest Rate		0.05%
U.S. Treasury Bills, 0.075% due February 13, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		13-Feb-14
Investment Interest Rate		0.08%
U.S. Treasury Bills, 0.080% due February 20, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		20-Feb-14
Investment Interest Rate		0.08%
U.S. Treasury Bills, 0.080% due February 27, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		27-Feb-14
Investment Interest Rate		0.08%
U.S. Treasury Bills, 0.075% due March 6, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		6-Mar-14
Investment Interest Rate		0.08%
U.S. Treasury Bills, 0.070% due March 13, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		13-Mar-14
Investment Interest Rate		0.07%
U.S. Treasury Bills, 0.065% due March 20, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		20-Mar-14
Investment Interest Rate		0.07%
U.S. Treasury Bills, 0.070% due March 27, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		27-Mar-14
Investment Interest Rate		0.07%
U.S. Treasury Bills, 0.065% due April 3, 2014 [Member]
Schedule of Investments [Line Items]
Investment Maturity Date		3-Apr-14
Investment Interest Rate		0.07%

Schedule_of_Investments_Future

Schedule of Investments - Futures Contracts (USD $)	Dec. 31, 2014	Dec. 31, 2013
CBOT Corn (13,583 contracts, settlement date December 14, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.12%
Unrealized Appreciation/ (Depreciation)	$4,735,363
Notional Market Value	285,922,150
CBOT Soybean (5,578 contracts, settlement date November 13, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.33%
Unrealized Appreciation/ (Depreciation)	13,539,213
Notional Market Value	280,433,950
CBOT Wheat (9,808 contracts, settlement date July 14, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-0.69%
Unrealized Appreciation/ (Depreciation)	-27,815,113
Notional Market Value	293,014,000
COMEX Gold (3,452 contracts, settlement date April 28, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-0.63%
Unrealized Appreciation/ (Depreciation)	-25,518,800
Notional Market Value	409,027,480
COMEX Silver (1,262 contracts, settlement date January 27, 2016) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-0.13%
Unrealized Appreciation/ (Depreciation)	-5,103,340
Notional Market Value	99,382,500
ICE-UK Brent Crude (7,100 contracts, settlement date November 13, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-3.89%
Unrealized Appreciation/ (Depreciation)	-157,113,220
Notional Market Value	464,624,000
LME Aluminum (4,072 contracts, settlement date October 19, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-0.61%
Unrealized Appreciation/ (Depreciation)	-24,603,938
Notional Market Value	191,969,350
LME Copper (1,254 contracts, settlement date February 16, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-0.08%
Unrealized Appreciation/ (Depreciation)	-3,354,294
Notional Market Value	198,351,450
LME Zinc (3,721 contracts, settlement date February 16, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-0.15%
Unrealized Appreciation/ (Depreciation)	-6,141,775
Notional Market Value	201,980,531
MGE Red Wheat (571 contracts, settlement date July 14, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	0.02%
Unrealized Appreciation/ (Depreciation)	1,035,825
Notional Market Value	18,193,487
NYB-ICE Sugar (15,419 contracts, settlement date June 30, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-1.41%
Unrealized Appreciation/ (Depreciation)	-57,071,762
Notional Market Value	263,356,520
NYMEX Natural Gas (7,327 contracts, settlement date March 27, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-1.63%
Unrealized Appreciation/ (Depreciation)	-65,854,870
Notional Market Value	211,090,870
NYMEX NY Harbor (6,082 contracts, settlement date May 29, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-6.32%
Unrealized Appreciation/ (Depreciation)	-255,059,116
Notional Market Value	463,477,594
NYMEX RBOB Gasoline (6,930 contracts, settlement date November 30, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-1.60%
Unrealized Appreciation/ (Depreciation)	-64,711,437
Notional Market Value	464,095,170
NYMEX WTI Crude (7,999 contracts, settlement date January 20, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-2.53%
Unrealized Appreciation/ (Depreciation)	-102,120,400
Notional Market Value	426,106,730
Total Commodity Futures Contracts [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	-19.20%	0.65%
Unrealized Appreciation/ (Depreciation)	-775,157,664	37,252,674
Notional Market Value	4,271,025,782	5,886,234,763
CBOT Corn (13,921 contracts, settlement date December 12, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.20%
Unrealized Appreciation/ (Depreciation)		-11,449,962
Notional Market Value		313,396,512
CBOT Soybean (5,617 contracts, settlement date November 14, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.19%
Unrealized Appreciation/ (Depreciation)		-10,784,500
Notional Market Value		318,764,750
CBOT Wheat (9,527 contracts, settlement date July 14, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.96%
Unrealized Appreciation/ (Depreciation)		-54,864,038
Notional Market Value		293,788,863
COMEX Gold (3,605 contracts, settlement date April 28, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.35%
Unrealized Appreciation/ (Depreciation)		-20,035,440
Notional Market Value		433,681,500
COMEX Silver (1,075 contracts, settlement date January 28, 2015) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.02%
Unrealized Appreciation/ (Depreciation)		-1,104,600
Notional Market Value		104,963,000
ICE-UK Brent Crude (6,880 contracts, settlement date March 14, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.95%
Unrealized Appreciation/ (Depreciation)		54,156,040
Notional Market Value		758,657,600
LME Aluminum (5,098 contracts, settlement date October 13, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.10%
Unrealized Appreciation/ (Depreciation)		-5,914,994
Notional Market Value		238,299,638
LME Copper (1,347 contracts, settlement date March 17, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.47%
Unrealized Appreciation/ (Depreciation)		-26,607,225
Notional Market Value		248,041,631
LME Zinc (4,896 contracts, settlement date December 15, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.23%
Unrealized Appreciation/ (Depreciation)		13,019,094
Notional Market Value		255,816,000
MGE Red Wheat (222 contracts, settlement date March 14, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.02%
Unrealized Appreciation/ (Depreciation)		-907,550
Notional Market Value		7,051,275
NYB-ICE Sugar (16,357 contracts, settlement date June 30, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		-0.16%
Unrealized Appreciation/ (Depreciation)		-9,069,547
Notional Market Value		306,490,923
NYMEX Natural Gas (8,562 contracts, settlement date September 26, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.37%
Unrealized Appreciation/ (Depreciation)		21,221,730
Notional Market Value		356,350,440
NYMEX Ny Harbor Ulsd (5,945 contracts, settlement date March 31, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.36%
Unrealized Appreciation/ (Depreciation)		20,392,348
Notional Market Value		759,931,515
NYMEX Rbob Gasoline (6,880 contracts, settlement date November 28, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.61%
Unrealized Appreciation/ (Depreciation)		34,677,098
Notional Market Value		750,458,016
NYMEX WTI Crude (7,678 contracts, settlement date June 20, 2014) [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		0.60%
Unrealized Appreciation/ (Depreciation)		34,524,220
Notional Market Value		$740,543,100

Schedule_of_Investments_Future1

Schedule of Investments - Futures Contracts (Parenthetical)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Contract	Contract
CBOT Corn (13,583 contracts, settlement date December 14, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	13,583
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	14-Dec-15
CBOT Soybean (5,578 contracts, settlement date November 13, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	5,578
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	13-Nov-15
CBOT Wheat (9,808 contracts, settlement date July 14, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	9,808
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	14-Jul-15
COMEX Gold (3,452 contracts, settlement date April 28, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	3,452
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	28-Apr-15
COMEX Silver (1,262 contracts, settlement date January 27, 2016) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	1,262
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	27-Jan-16
ICE-UK Brent Crude (7,100 contracts, settlement date November 13, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	7,100
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	13-Nov-15
LME Aluminum (4,072 contracts, settlement date October 19, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	4,072
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	19-Oct-15
LME Copper (1,254 contracts, settlement date February 16, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	1,254
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	16-Feb-15
LME Zinc (3,721 contracts, settlement date February 16, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	3,721
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	16-Feb-15
MGE Red Wheat (571 contracts, settlement date July 14, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	571
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	14-Jul-15
NYB-ICE Sugar (15,419 contracts, settlement date June 30, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	15,419
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	30-Jun-15
NYMEX Natural Gas (7,327 contracts, settlement date March 27, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	7,327
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	27-Mar-15
NYMEX NY Harbor (6,082 contracts, settlement date May 29, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	6,082
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	29-May-15
NYMEX RBOB Gasoline (6,930 contracts, settlement date November 30, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	6,930
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	30-Nov-15
NYMEX WTI Crude (7,999 contracts, settlement date January 20, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts	7,999
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates	20-Jan-15
CBOT Corn (13,921 contracts, settlement date December 12, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		13,921
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		12-Dec-14
CBOT Soybean (5,617 contracts, settlement date November 14, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		5,617
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		14-Nov-14
CBOT Wheat (9,527 contracts, settlement date July 14, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		9,527
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		14-Jul-14
COMEX Gold (3,605 contracts, settlement date April 28, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		3,605
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		28-Apr-14
COMEX Silver (1,075 contracts, settlement date January 28, 2015) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		1,075
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		28-Jan-15
ICE-UK Brent Crude (6,880 contracts, settlement date March 14, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		6,880
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		14-Mar-14
LME Aluminum (5,098 contracts, settlement date October 13, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		5,098
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		13-Oct-14
LME Copper (1,347 contracts, settlement date March 17, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		1,347
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		17-Mar-14
LME Zinc (4,896 contracts, settlement date December 15, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		4,896
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		15-Dec-14
MGE Red Wheat (222 contracts, settlement date March 14, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		222
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		14-Mar-14
NYB-ICE Sugar (16,357 contracts, settlement date June 30, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		16,357
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		30-Jun-14
NYMEX Natural Gas (8,562 contracts, settlement date September 26, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		8,562
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		26-Sep-14
NYMEX Ny Harbor Ulsd (5,945 contracts, settlement date March 31, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		5,945
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		31-Mar-14
NYMEX Rbob Gasoline (6,880 contracts, settlement date November 28, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		6,880
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		28-Nov-14
NYMEX WTI Crude (7,678 contracts, settlement date June 20, 2014) [Member]
Schedule of Investments [Line Items]
Open Option Contracts Written, Number of Contracts		7,678
Forward Contract Indexed to Issuer's Equity, Settlement Date or Dates		20-Jun-14

Statements_of_Income_and_Expen

Statements of Income and Expenses (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income
Interest Income	$1,840,717	$3,243,074	$4,070,308
Expenses
Management Fee	45,609,981	54,985,133	52,794,819
Brokerage Commissions and Fees	1,428,704	1,444,072	1,471,822
Total Expenses	47,038,685	56,429,205	54,266,641
Net investment income (loss)	-45,197,968	-53,186,131	-50,196,333
Net Realized Gain (Loss) on
United States Treasury Obligations	39,941	66,506	20,919
Futures	-746,348,836	-447,211,586	-257,726,563
Net realized gain (loss)	-746,308,895	-447,145,080	-257,705,644
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations	-96,282	-210,213	354,040
Futures	-812,410,338	-36,200,984	449,677,202
Net change in unrealized gain (loss)	-812,506,620	-36,411,197	450,031,242
Net realized and net change in unrealized gain (loss) on United States Treasury Obligations and Futures	-1,558,815,515	-483,556,277	192,325,598
Net Income (Loss)	($1,604,013,483)	($536,742,408)	$142,129,265

Statement_of_Changes_in_Shareh

Statement of Changes in Shareholders' Equity (USD $)	Total	General Shares [Member]	General Shares [Member]	Shares [Member]	Shares [Member]
	USD ($)		Total Equity [Member]		Total Equity [Member]
			USD ($)		USD ($)
Balance - Value at Dec. 31, 2011	$5,467,382,569		$1,073		$5,467,381,496
Balance - Shares at Dec. 31, 2011		40		203,800,000
Sale of Shares - Value	1,748,800,266				1,748,800,266
Sale of Shares - Shares				62,600,000
Redemption of Shares - Value	-750,772,676				-750,772,676
Redemption of Shares - Shares				-28,000,000
Net Increase (Decrease) due to Share Transactions, value	998,027,590				998,027,590
Net Increase (Decrease) due to Share Transactions, shares				34,600,000
Net Income (Loss)
Net investment income (loss)	-50,196,333		-13		-50,196,320
Net realized gain (loss) on United States Treasury Obligations and Futures	-257,705,644		-65		-257,705,579
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	450,031,242		114		450,031,128
Net Income (Loss)	142,129,265		36		142,129,229
Net Change in Shareholders' Equity, value	1,140,156,855		36		1,140,156,819
Net Change in Shareholders' Equity, shares				34,600,000
Balance - Value at Dec. 31, 2012	6,607,539,424		1,109		6,607,538,315
Balance - Shares at Dec. 31, 2012		40		238,400,000
Sale of Shares - Value	1,206,986,989				1,206,986,989
Sale of Shares - Shares				45,000,000
Redemption of Shares - Value	-1,581,308,509				-1,581,308,509
Redemption of Shares - Shares				-61,000,000
Net Increase (Decrease) due to Share Transactions, value	-374,321,520				-374,321,520
Net Increase (Decrease) due to Share Transactions, shares				-16,000,000
Net Income (Loss)
Net investment income (loss)	-53,186,131		-8		-53,186,123
Net realized gain (loss) on United States Treasury Obligations and Futures	-447,145,080		-71		-447,145,009
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	-36,411,197		-6		-36,411,191
Net Income (Loss)	-536,742,408		-85		-536,742,323
Net Change in Shareholders' Equity, value	-911,063,928		-85		-911,063,843
Net Change in Shareholders' Equity, shares				-16,000,000
Balance - Value at Dec. 31, 2013	5,696,475,496		1,024		5,696,474,472
Balance - Shares at Dec. 31, 2013	222,400,000	40		222,400,000
Sale of Shares - Value	1,121,198,095				1,121,198,095
Sale of Shares - Shares				45,400,000
Redemption of Shares - Value	-1,177,235,663				-1,177,235,663
Redemption of Shares - Shares				-48,400,000
Net Increase (Decrease) due to Share Transactions, value	-56,037,568				-56,037,568
Net Increase (Decrease) due to Share Transactions, shares				-3,000,000
Net Income (Loss)
Net investment income (loss)	-45,197,968		-8		-45,197,960
Net realized gain (loss) on United States Treasury Obligations and Futures	-746,308,895		-134		-746,308,761
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	-812,506,620		-146		-812,506,474
Net Income (Loss)	-1,604,013,483		-288		-1,604,013,195
Net Change in Shareholders' Equity, value	-1,660,051,051		-288		-1,660,050,763
Net Change in Shareholders' Equity, shares				-3,000,000
Balance - Value at Dec. 31, 2014	$4,036,424,445		$736		$4,036,423,709
Balance - Shares at Dec. 31, 2014	219,400,000	40		219,400,000

Statements_of_Cash_Flows

Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flow from operating activities:
Net Income (Loss)	($1,604,013,483)	($536,742,408)	$142,129,265
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Cost of securities purchased	-21,215,312,035	-25,594,608,298	-23,652,604,317
Proceeds from securities sold and matured	22,688,974,945	25,972,752,459	23,043,161,408
Net accretion of discount on United States Treasury Obligations	-1,860,082	-3,449,080	-4,092,464
Net realized (gain) loss on United States Treasury Obligations	-39,941	-66,506	-20,919
Net change in unrealized (gain) loss on United States Treasury Obligations and Futures	812,506,620	36,411,197	-450,031,242
Change in operating receivables and liabilities:
Payable for LME contracts	-466,044	7,796,856	-14,672,312
Management fee payable	-1,241,158	-421,588	804,535
Brokerage fee payable	3,110	1,260	-1,655
Net cash provided by (used for) operating activities	678,551,932	-118,326,108	-935,327,701
Cash flows from financing activities:
Proceeds from sale of Shares	1,121,198,095	1,206,986,989	1,759,531,142
Redemption of Shares	-1,177,235,663	-1,581,308,509	-750,772,676
Net cash provided by (used for) financing activities	-56,037,568	-374,321,520	1,008,758,466
Net change in cash held by broker	622,514,364	-492,647,628	73,430,765
Cash held by commodity broker at beginning of year	123,072,778	615,720,406	542,289,641
Cash held by commodity broker at end of year	$745,587,142	$123,072,778	$615,720,406

Background

Background	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Background	(1) Background
	On October 24, 2014, DB Commodity Services LLC, a Delaware limited liability company (“DBCS”), DB U.S. Financial Markets Holding Corporation (“DBUSH”) and Invesco PowerShares Capital Management LLC (“Invesco”) entered into an Asset Purchase Agreement (the “Agreement”). DBCS is a wholly-owned subsidiary of DBUSH. DBCS agreed to transfer and sell to Invesco all of DBCS’ interest in the PowerShares DB Commodity Index Tracking Fund (the “Fund”), including the sole and exclusive power to direct the business and affairs of the Fund, as well as certain other assets pertaining to the management of the Fund, pursuant to the terms and conditions of the Agreement (the “Transaction”).
	The Transaction was consummated on February 23, 2015 (the “Closing Date”). Invesco now serves as the managing owner (the “Managing Owner”), commodity pool operator and commodity trading advisor of the Fund, in replacement of DBCS (the “Predecessor Managing Owner”).

Organization

Organization	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Organization	(2) Organization
	The Fund was formed as a Delaware statutory trust on May 23, 2005. The Predecessor Managing Owner seeded the Fund with a capital contribution of $1,000 in exchange for 40 General Shares of the Fund. The General Shares were sold to the Managing Owner by the Predecessor Managing Owner pursuant to the terms of the Agreement. The Fund was originally named “DB Commodity Index Tracking Fund”. The Fund changed its name to “PowerShares DB Commodity Index Tracking Fund” effective August 10, 2006. The fiscal year end of the Fund is December 31st. The term of the Fund is perpetual (unless terminated earlier in certain circumstances) as provided in the Fifth Amended and Restated Declaration of Trust and Trust Agreement of the Fund (the “Trust Agreement”). The Fourth Amended and Restated Declaration of Trust and Trust Agreement of the Fund dated November 12, 2012 was effective for purposes of the reporting period of this Form 10-K and up to the Closing Date.
	The Fund offers common units of beneficial interest (the “Shares”) only to certain eligible financial institutions (the “Authorized Participants”) in one or more blocks of 200,000 Shares, called a Basket. The Fund commenced investment operations on January 31, 2006. The Fund commenced trading on the American Stock Exchange (which became the NYSE Alternext US LLC (the “NYSE Alternext”)) on February 3, 2006 and, as of November 25, 2008, is listed on the NYSE Arca, Inc. (the “NYSE Arca”).
	This Report covers the years ended December 31, 2014, 2013 and 2012 (herein referred to, as the “Year Ended December 31, 2014”, the “Year Ended December 31, 2013” and the “Year Ended December 31, 2012”, respectively). The Fund’s performance information from inception up to and excluding the Closing Date is a reflection of the performance associated with the Predecessor Managing Owner. Past performance of the Fund is not necessarily indicative of future performance.

Fund_Investment_Overview

Fund Investment Overview	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Fund Investment Overview	(3) 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 Diversified Commodity Index Excess ReturnTM (the “Index”) over time, 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 commodity sector. The commodities comprising the Index are Light Sweet Crude Oil, Heating Oil, Aluminum, Gold, Corn, Wheat, Brent Crude, Copper Grade A, Natural Gas, RBOB Gasoline (reformulated gasoline blendstock for oxygen blending, or “RBOB”), Silver, Soybeans, Sugar and Zinc (the “Index Commodities”). The Fund also holds United States Treasury Obligations and other high credit quality short-term fixed income securities on deposit with the Fund’s commodity broker as margin.
	The CFTC and/or commodity exchanges, as applicable, impose position limits on market participants trading in certain commodities included in the Index. The Index is comprised of futures contracts on each of the Index Commodities that expire in a specific month and trade on a specific exchange (the “Index Contracts”). As disclosed in the Fund’s Prospectus, 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. Because the Fund is approaching or has reached position limits with respect to certain futures contracts comprising the Index, the Fund has commenced investing in other futures contracts based on commodities that comprise the Fund’s Index and in futures contracts based on commodities other than commodities that comprise the Fund’s Index.
	The Fund does not borrow money to increase leverage. As of December 31, 2014 and 2013, the Fund had $4,948,283,169 (or 100.0% of its total assets) and $6,799,938,046 (or 100.0% of its total assets), respectively, of its holdings of cash, United States Treasury Obligations and unrealized appreciation/depreciation of futures contracts on deposit with its Commodity Broker. Of this, $272,407,319 (or 5.51%) and $297,808,276 (or 4.38%) is required to be deposited to satisfy maintenance margin required by the Commodity Broker for the Fund’s open futures positions as of December 31, 2014 and 2013, respectively. For additional information, please see the audited Schedule of Investments as of December 31, 2014 and 2013 for details of the Fund’s portfolio holdings.

Service_Providers_and_Related_

Service Providers and Related Party Agreements	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Service Providers and Related Party Agreements	(4) Service Providers and Related Party Agreements
	The Trustee
	Under the Trust Agreement, Wilmington Trust Company, the trustee of the Fund (the “Trustee”), has delegated to the Managing Owner the exclusive management and control of all aspects of the business of the Fund. The Trustee will have no duty or liability to supervise or monitor the performance of the Managing Owner, nor will the Trustee have any liability for the acts or omissions of the Managing Owner.
	The Managing Owner
	The Managing Owner serves as the Fund’s commodity pool operator, commodity trading advisor, and managing owner. The Fund pays the Managing Owner a management fee, monthly in arrears, in an amount equal to 0.85% per annum of the daily net asset value of the Fund;provided, however, for purposes of the reporting period of this Form 10-K and up to the Closing Date, all Management Fees were payable to the Predecessor Managing Owner (the “Management Fee”).
	During the Year Ended December 31, 2014, the Fund incurred Management Fees of $45,609,981 of which $3,042,481 was payable at December 31, 2014. During the Year Ended December 31, 2013, the Fund incurred Management Fees of $54,985,133 of which $4,283,639 was payable at December 31, 2013. During the Year Ended December 31, 2012, the Fund incurred Management Fees of $52,794,819.
	The Commodity Broker
	Effective as of the Closing Date, Morgan Stanley & Co. LLC, a Delaware limited liability company, serves as the Fund’s futures clearing broker (“Commodity Broker”); provided, however, Deutsche Bank Securities Inc. (“DBSI”), a Delaware corporation, served as the Fund’s futures clearing broker prior to and during the reporting period of this Form 10-K and up to the Closing Date (the “Predecessor Commodity Broker”). DBSI is also an indirect wholly-owned subsidiary of Deutsche Bank AG and is an affiliate of the Predecessor Managing Owner. In its capacity as clearing broker, the Commodity Broker executes and clears each of the Fund’s futures transactions and performs certain administrative and custodial services for the Fund. As custodian of the Fund’s assets, the Commodity Broker is responsible, among other things, for providing periodic accountings of all dealings and actions taken by the Fund during the reporting period, together with an accounting of all securities, cash or other indebtedness or obligations held by it or its nominees for or on behalf of the Fund. During the Year Ended December 31, 2014, the Fund incurred brokerage fees of $1,428,704, of which $4,575 was payable at December 31, 2014. During the Year Ended December 31, 2013, the Fund incurred brokerage fees of $1,444,072, of which $1,465 was payable at December 31, 2013. During the Year Ended December 31, 2012, the Fund incurred brokerage fees of $1,471,822.
	The Administrator, Custodian and Transfer Agent
	The Bank of New York Mellon (the “Administrator”) is the administrator, custodian and transfer agent of the Fund, and has entered into separate administrative, custodian, transfer agency and service agreements (collectively referred to as the “Administration Agreement”).
	Pursuant to the Administration Agreement, the Administrator performs or supervises the performance of services necessary for the operation and administration of the Fund (other than making investment decisions), including receiving and processing orders from Authorized Participants to create and redeem Baskets, net asset value calculations, accounting and other fund administrative services. The Administrator retains certain financial books and records, including: Basket creation and redemption books and records, fund accounting records, ledgers with respect to assets, liabilities, capital, income and expenses, the registrar, transfer journals and related details, and trading and related documents received from the Commodity Broker and other unaffiliated futures commission merchants. As of December 31, 2014 and 2013, there were no Fund assets held by the Administrator.
	The Distributor
	ALPS Distributors, Inc. (the “Distributor”) provides certain distribution services to the Fund. Pursuant to the Distribution Services Agreement among the Managing Owner in its capacity as managing owner of the Fund, the Fund and the Distributor, the Distributor assists the Managing Owner and the Administrator with certain functions and duties relating to distribution and marketing services to the Fund including reviewing and approving marketing materials.
	Index Sponsor
	Effective as of the Closing Date, the Managing Owner, on behalf of the Fund, has appointed Deutsche Bank Securities Inc. to serve as the index sponsor (the “Index Sponsor”). (Prior to the Closing Date, the index sponsor was Deutsche Bank AG London.) The Index Sponsor calculates and publishes the daily index levels and the indicative intraday index levels. Additionally, the Index Sponsor also calculates the indicative value per Share of the Fund throughout each Business Day.
	The Managing Owner pays the Index Sponsor a licensing fee and an index services fee for performing its duties.
	Marketing Agent
	Effective as of the Closing Date, the Managing Owner, on behalf of the Fund, has appointed Deutsche Bank Securities Inc. as the marketing agent (the “Marketing Agent”) to assist the Managing Owner by providing support to educate institutional investors about the Deutsche Bank indices and to complete governmental or institutional due diligence questionnaires or requests for proposals related to the Deutsche Bank indices.
	The Managing Owner pays the Marketing Agent a marketing services fee.
	The Marketing Agent will not open or maintain customer accounts or handle orders for the Fund. The Marketing Agent has no responsibility for the performance of the Fund or the decisions made or actions taken by the Managing Owner.

Summary_of_Significant_Account

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

(5) Summary of Significant Accounting Policies

(a) Basis of Presentation

The financial statements of the Fund have been prepared using U.S. generally accepted accounting principles (“U.S. GAAP”).

In June 2013, the Financial Accounting Standards Board (“FASB”) issued updated guidance clarifying the characteristics of an investment company and requiring new disclosures. Under the guidance, all entities regulated under the Investment Company Act of 1940 automatically qualify as investment companies, while all other entities need to consider both the fundamental and typical characteristics of an investment company in determining whether they qualify as investment companies. This new guidance is effective for interim or annual reporting periods that begin after December 15, 2013, and should be applied prospectively. The Fund adopted this guidance effective January 1, 2014. The Fund has determined that it meets the definition of an investment company and has prepared the financial statements in conformity with accounting and reporting guidance of the FASB Accounting Standards Codification Topic 946 – Investment Companies, which is part of U.S. GAAP. The adoption of this guidance had no effect on the Fund’s statements of financial condition, including the schedule of investments, and the related statements of income and expenses, changes in shareholders’ equity and of cash flows.

In August 2014, the FASB issued a new standard, Accounting Standards Update No. 2014-15 Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which will explicitly require management to assess an entity’s ability to continue as a going concern and to provide related footnote disclosure in certain circumstances. This new guidance is effective for all entities in the first annual reporting period ending after December 15, 2016. The Fund is currently evaluating this guidance and its impact on the Fund’s financial statement disclosures.

(b) Use of Estimates

The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses and related disclosure of contingent assets and liabilities during the reporting period of the financial statements and accompanying notes. Actual results could differ from those estimates. There were no significant estimates used in the preparation of these financial statements.

(c) Financial Instruments and Fair Value

United States Treasury Obligations and commodity futures contracts are recorded in the statements of financial condition on a trade date basis at fair value with changes in fair value recognized in earnings in each period. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price). The brokerage agreement with the Commodity Broker provides for the net settlement of all financial instruments covered by the agreement in the event of default or termination of any one contract.

Financial Accounting Standards Board (FASB) Accounting Standards Codification fair value measurement and disclosure guidance requires a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below:

Basis of Fair Value Measurement

Level 1:

Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2:

Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly;

Level 3:

Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

In determining fair value of United States Treasury Obligations and non-LME commodity futures contracts, the Fund uses unadjusted quoted market prices in active markets. United States Treasury Obligations and non-LME commodity futures contracts are classified within Level 1 of the fair value hierarchy. The Fund does not adjust the quoted prices for United States Treasury Obligations and commodity futures contracts.

In determining fair value of LME commodity futures contracts, the Fund uses valuation pricing based on action of a committee that incorporates prices from the most liquid trading sessions of the day and can also rely on other inputs such as trades, bids and offers (including indicative bids and offers) transacted throughout the whole day. During the year ended December 31, 2013, management changed the classification of LME commodity futures from Level 1 to Level 2.

Assets and Liabilities Measured at Fair Value as of December 31, 2014 were as follows:

Level 1

Level 2

Total

United States Treasury Obligations

$

4,977,853,691

—

$

4,977,853,691

Commodity Futures Contracts

$

(741,057,657

)

$

(34,100,007

)

$

(775,157,664

)

Assets and Liabilities Measured at Fair Value as of December 31, 2013 were as follows:

Level 1

Level 2

Total

United States Treasury Obligations

$

6,639,612,594

—

$

6,639,612,594

Commodity Futures Contracts

$

56,755,799

$

(19,503,125

)

$

37,252,674

There were no Level 3 holdings during the years ended December 31, 2014 and 2013. The Fund’s policy is to recognize transfers in and out of the valuation levels as of the end of the reporting period. Futures contracts in a net depreciation position of 19,503,125 were transferred from Level 1 to Level 2 during the year ended December 31, 2013 as described above.

(d) Deposits with Commodity Broker

The Fund deposits cash and United States Treasury Obligations with its Commodity Broker subject to CFTC regulations and various exchange and broker requirements. The combination of the Fund’s deposits with its Commodity Broker of cash and United States Treasury Obligations and the unrealized profit or loss on open futures contracts (variation margin) represents the Fund’s overall equity in its broker trading account. To meet the Fund’s initial margin requirements, the Fund holds United States Treasury Obligations. The Fund uses its cash held by the Commodity Broker to satisfy variation margin requirements. The Fund earns interest on its cash deposited with the Commodity Broker.

(e) United States Treasury Obligations

The Fund records purchases and sales of United States Treasury Obligations on a trade date basis. These holdings are marked to market based on quoted market closing prices. The Fund holds United States Treasury Obligations for deposit with the Fund’s Commodity Broker to meet margin requirements and for trading purposes. Interest income is recognized on an accrual basis when earned. Premiums and discounts are amortized or accreted over the life of the United States Treasury Obligations. The Fund purchased $899,000,000 face amount of United States Treasury Obligations valued at $898,921,337 which was recorded as payable for securities purchased as of December 31, 2014. The Fund purchased $1,089,000,000 face amount of United States Treasury Obligations valued at $1,088,821,071 which was recorded as payable for securities purchased as of December 31, 2013.

(f) Cash Held by Commodity Broker

The Fund’s arrangement with the Commodity Broker requires the Fund to meet its variation margin requirement related to the price movements, both positive and negative, on futures contracts held by the Fund by keeping cash on deposit with the Commodity Broker. The Fund defines cash and cash equivalents to be highly liquid investments, with original maturities of three months or less, when purchased. As of December 31, 2014 and 2013, the Fund had cash held with the Commodity Broker of $745,587,142, and $123,072,778, respectively. There were no cash equivalents held by the Fund as of December 31, 2014 and 2013.

(g) Receivable/ (Payable) for LME Contracts

The Fund trades aluminum, copper and zinc commodity future contracts on the London Metals Exchange (“LME”). For settlement of futures contracts traded on the LME, cash is not transferred until the settled futures contracts expire. As of December 31, 2014 and 2013, the Fund had a payable to the Commodity Broker of $9,890,331 and $10,356,375, respectively, related to net realized losses on LME contracts which have been closed out but the contract is not yet expired.

(h) Income Taxes

The Fund is classified as a partnership for U.S. federal income tax purposes. Accordingly, the Fund will not incur U.S. federal income taxes. No provision for federal, state, and local income taxes has been made in the accompanying financial statements, as investors are individually liable for income taxes, if any, on their allocable share of the Fund’s income, gain, loss, deductions and other items.

Management of the Fund has reviewed all open tax years and major jurisdictions and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Funds are also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management will monitor its tax positions taken under the interpretation (and consult with its tax counsel from time to time when appropriate) to determine if adjustments to conclusions are necessary based on factoring including, but not limited to, on-going analysis of tax law, regulation, and interpretations thereof. The major tax jurisdiction for the Fund and the earliest tax year subject to examination: United States, 2010.

(i) Futures Contracts

All commodity futures contracts are held and used for trading purposes. Commodity futures contracts are recorded on a trade date basis and open contracts are recorded in the statement of financial condition at fair value on the last business day of the period, which represents market value for those commodity futures contracts for which market quotes are readily available. However, when market closing prices are not available, the Managing Owner may value an asset of the Fund pursuant to policies the Managing Owner has adopted, which are consistent with normal industry standards. Realized gains (losses) and changes in unrealized appreciation (depreciation) on open positions are determined on a specific identification basis and recognized in the statement of income and expenses in the period in which the contract is closed or the changes occur, respectively. For the years ended December 31, 2014 and 2013, the average monthly notional market value of futures contracts held was $5.5 billion and $6.6 billion, respectively.

The Fair Value of Derivative Instruments as of December 31, 2014 is as follows:

Derivatives not Accounted for as

Statements of Financial Condition Location

Net Unrealized

Hedging Instruments

Appreciation /

(Depreciation)

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

(775,157,664

)

The Fair Value of Derivative Instruments as of December 31, 2013 is as follows:

Derivatives not Accounted for as

Statements of Financial Condition Location

Net Unrealized

Hedging Instruments

Appreciation /

(Depreciation)

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

37,252,674

The Effect of Derivative Instruments on the Statements of Income and Expenses is as follows:

For the Year Ended

For the Year Ended

For the Year Ended

December 31, 2014

December 31, 2013

December 31, 2012

Derivatives not

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Realized Gain

Change in

Accounted for as

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Hedging Instruments

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Recognized in

Income

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(746,348,836

)

—

$

(447,211,586

)

—

$

(257,726,563

)

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

(812,410,338

)

—

$

(36,200,984

)

—

$

449,677,202

The Fund utilizes derivative instruments to achieve its investment objective. For financial reporting purposes, the Fund offsets financial assets and financial liabilities that are subject to netting arrangements. In order for an arrangement to be eligible for netting, the Fund must have a basis to conclude that such netting arrangements are legally enforceable. The following table presents derivative instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements as of December 31, 2014, net by contract:

Gross Amounts Not Offset in the

Statement of Financial Condition

Gross Amounts

Gross Amounts

Net Amounts

Financial

Cash Collateral

Net

Recognized

Offset in the

Presented in

Instruments*

Pledged*

Amount

Statement of

the Statement of

Financial Condition

Financial Condition

Assets

Commodity Futures Contracts

$

19,310,401

$

(19,310,401

)

$

—

$

—

$

—

$

—

Liabilities

Commodity Futures Contracts

$

(794,468,065

)

$

19,301,401

$

(775,157,664

)

$

29,570,522

$

745,587,142

$

—

The following table presents derivative instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements as of December 31, 2013:

Gross Amounts Not Offset in the

Statement of Financial Condition

Gross Amounts

Gross Amounts

Net Amounts

Financial

Cash Collateral

Net Amount

Recognized

Offset in the

Presented in

Instruments*

Pledged*

Statement of

the Statement of

Financial Condition

Financial Condition

Assets

Commodity Futures Contracts

$

180,119,798

$

(142,867,124

)

$

37,252,674

$

—

$

—

$

37,252,674

Liabilities

Commodity Futures Contracts

$

(142,867,124

)

$

142,867,124

$

—

$

—

$

—

$

—

*

As of December 31, 2014 and December 31, 2013, a portion of the Fund’s cash and US Treasury Obligations were required to be deposited as margin in support of the Fund’s futures positions as described in Note 3.

The Managing Owner will utilize the cash held at the commodity broker to offset any realized losses incurred in the commodity futures contracts, if available. To the extent that cash held at the commodity broker is not adequate to cover any realized losses, a portion of the United States Treasury Bills will be sold to make additional cash available.

(j) Brokerage Commissions and Fees

The Fund incurs all brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities by the Commodity Broker. These costs are recorded as brokerage commissions and fees in the statement of income and expenses as incurred. The Commodity Broker’s brokerage commissions and trading fees are determined on a contract-by-contract basis. On average, total charges paid to the Commodity Broker were less than $10.00 per round-turn trade for the Years Ended December 31, 2014, 2013 and 2012.

(k) Routine Operational, Administrative and Other Ordinary Expenses

Effective as of the Closing Date, the Managing Owner assumes all routine operational, administrative and other ordinary expenses of the Fund, including, but not limited to, computer services, the fees and expenses of the Trustee, legal and accounting fees and expenses, tax preparation expenses, filing fees and printing, mailing and duplication costs. For purposes of the reporting period of this Form 10-K and up to the Closing Date, the Predecessor Managing Owner assumed all routine operational, administrative and other ordinary expenses of the Fund. Accordingly, all such expenses are not reflected in the statement of income and expenses of the Fund.

(l) Organizational and Offering Costs

Prior to the Closing Date, all organizational and offering expenses (including continuous offering expenses for the offering of the Shares) incurred by the Fund was assumed by the Predecessor Managing Owner. Effective as of the Closing Date, all offering expenses (including continuous offering expenses for the offering of the Shares) incurred by the Fund were assumed by the Managing Owner. The Fund is not responsible to either the Predecessor Managing Owner or the Managing Owner for the reimbursement of organizational and offering costs (including continuous offering expenses for the offering of the Shares).

(m) Non-Recurring Fees and Expenses

The Fund pays all non-recurring and unusual fees and expenses (referred to as extraordinary fees and expenses in the Trust Declaration), if any, of itself, as determined by the Managing Owner. Non-recurring and unusual fees and expenses are fees and expenses which are non-recurring and unusual in nature, such as legal claims and liabilities, litigation costs or indemnification or other unanticipated expenses. Such non-recurring and unusual fees and expenses, by their nature, are unpredictable in terms of timing and amount. For the Years Ended December 31, 2014, 2013 and 2012, the Fund did not incur such expenses.

Financial_Instrument_Risk

Financial Instrument Risk	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Financial Instrument Risk	(6) Financial Instrument Risk
	In the normal course of its business, the Fund is a party to financial instruments with off-balance sheet risk. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the balance sheet, may result in a future obligation or loss in excess of the amounts shown on the Statement of Financial Condition. The financial instruments used by the Fund are commodity futures, whose values are based upon an underlying asset and generally represent future commitments that have a reasonable possibility of being settled in cash or through physical delivery. The financial instruments are traded on an exchange and are standardized contracts.
	Market risk is the potential for changes in the value of the financial instruments traded by the Fund due to market changes, including fluctuations in commodity prices. In entering into these futures contracts, there exists a market risk that such futures contracts may be significantly influenced by adverse market conditions, resulting in such futures contracts being less valuable. If the markets should move against all of the futures contracts at the same time, the Fund could experience substantial losses.
	Credit risk is the possibility that a loss may occur due to the failure of the Commodity Broker and/or clearinghouse to perform according to the terms of a futures contract. Credit risk with respect to exchange-traded instruments is reduced to the extent that an exchange or clearing organization acts as a counterparty to the transactions. The Commodity Broker, when acting as the Fund’s futures commission merchant in accepting orders for the purchase or sale of domestic futures contracts, is required by CFTC regulations to separately account for and segregate as belonging to the Fund all assets of the Fund relating to domestic futures trading and the Commodity Broker is not allowed to commingle such assets with other assets of the Commodity Broker. In addition, CFTC regulations also require the Commodity Broker to hold in a secure account assets of the Fund related to foreign futures trading. The Fund’s risk of loss in the event of counterparty default is typically limited to the amounts recognized in the statement of financial condition and not represented by the futures contract or notional amounts of the instruments.
	The Fund has not utilized, nor does it expect to utilize in the future, special purpose entities to facilitate off-balance sheet financing arrangements and has no loan guarantee arrangements or off-balance sheet arrangements of any kind, other than agreements entered into in the normal course of business noted above.

Share_Purchases_and_Redemption

Share Purchases and Redemptions	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Share Purchases and Redemptions	(7) Share Purchases and Redemptions
	(a) Purchases
	On any business day, an Authorized Participant may place an order with the Transfer Agent to create one or more Baskets. For purposes of processing both creation and redemption orders, a “business day” means any day other than a day when banks in New York City are required or permitted to be closed. Creation orders must be placed by 10:00 a.m., Eastern time. The day on which the Transfer Agent receives a valid creation order is the creation order date. The day on which a creation order is settled is the creation order settlement date. As provided below, the creation order settlement date may occur up to 3 business days after the creation order date. By placing a creation order, and prior to delivery of such Baskets, an Authorized Participant’s DTC account is charged the non-refundable transaction fee due for the creation order.
	Unless otherwise agreed to by the Managing Owner and the Authorized Participant as provided in the next sentence, Baskets are issued on the creation order settlement date as of 2:45 p.m., Eastern time, on the business day immediately following the creation order date at the applicable net asset value per Share as of the closing time of the NYSE Arca or the last to close of the exchanges on which its futures contracts are traded, whichever is later, on the creation order date, but only if the required payment has been timely received. Upon submission of a creation order, the Authorized Participant may request the Managing Owner to agree to a creation order settlement date up to 3 business days after the creation order date. By placing a creation order, and prior to receipt of the Baskets, an Authorized Participant’s DTC account is charged the non-refundable transaction fee due for the creation order.
	Creation orders may be placed either (i) through the Continuous Net Settlement (“CNS”) clearing processes of the National Securities Clearing Corporation (the “NSCC”) or (ii) if outside the CNS Clearing Process, only through the facilities of The Depository Trust Company (“DTC” or the “Depository”) (the “DTC Process”), or a successor depository.
	(b) Redemptions
	On any business day, an Authorized Participant may place an order with the Transfer Agent to redeem one or more Baskets. Redemption orders must be placed by 10:00 a.m., Eastern time. The day on which the Managing Owner receives a valid redemption order is the redemption order date. The day on which a redemption order is settled is the redemption order settlement date. As provided below, the redemption order settlement date may occur up to 3 business days after the redemption order date. The redemption procedures allow Authorized Participants to redeem Baskets. Individual Shareholders may not redeem directly from the Fund. Instead, individual Shareholders may only redeem Shares in integral multiples of 200,000 and only through an Authorized Participant.
	Unless otherwise agreed to by the Managing Owner and the Authorized Participant as provided in the next sentence, by placing a redemption order, an Authorized Participant agrees to deliver the Baskets to be redeemed through DTC’s book-entry system to the Fund not later than the redemption order settlement date as of 2:45 p.m., Eastern time, on the business day immediately following the redemption order date. Upon submission of a redemption order, the Authorized Participant may request the Managing Owner to agree to a redemption order settlement date up to 3 business days after the redemption order date. By placing a redemption order, and prior to receipt of the redemption proceeds, an Authorized Participant’s DTC account is charged the non-refundable transaction fee due for the redemption order.
	Redemption orders may be placed either (i) through the CNS clearing processes of the NSCC or (ii) if outside the CNS Clearing Process, only through the DTC Process, or a successor depository, and only in exchange for cash. By placing a redemption order, and prior to receipt of the redemption proceeds, an Authorized Participant’s DTC account is charged the non-refundable transaction fee due for the redemption order.
	The redemption proceeds from the Fund consist of the cash redemption amount. The cash redemption amount is equal to the net asset value of the number of Basket(s) requested in the Authorized Participant’s redemption order as of the closing time of the NYSE Arca or the last to close of the exchanges on which the Fund’s futures contracts are traded, whichever is later, on the redemption order date. The Managing Owner will distribute the cash redemption amount at redemption order settlement date as of 2:45 pm, Eastern time, on the redemption order settlement date through DTC to the account of the Authorized Participant as recorded on DTC’s book-entry system.
	The redemption proceeds due from the Fund are delivered to the Authorized Participant at 2:45 p.m., Eastern time, on the redemption order settlement date if, by such time, the Fund’s DTC account has been credited with the Baskets to be redeemed. If the Fund’s DTC account has not been credited with all of the Baskets to be redeemed by such time, the redemption distribution is delivered to the extent of whole Baskets received. Any remainder of the redemption distribution is delivered on the next business day to the extent of remaining whole Baskets received if the Transfer Agent receives the fee applicable to the extension of the redemption distribution date which the Managing Owner may, from time-to-time, determine and the remaining Baskets to be redeemed are credited to the Fund’s DTC account by 2:45 p.m., Eastern time, on such next business day. Any further outstanding amount of the redemption order will be cancelled. The Managing Owner is also authorized to deliver the redemption distribution notwithstanding that the Baskets to be redeemed are not credited to the Fund’s DTC account by 2:45 p.m., Eastern time, on the redemption order settlement date if the Authorized Participant has collateralized its obligation to deliver the Baskets through DTC’s book entry system on such terms as the Managing Owner may determine from time-to-time.

Profit_and_Loss_Allocations_an

Profit and Loss Allocations and Distributions	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Profit and Loss Allocations and Distributions	(8) Profit and Loss Allocations and Distributions
	Pursuant to the Trust Agreement, income and expenses are allocated pro rata to the Managing Owner as holder of the General Shares and to the Shareholders monthly based on their respective percentage interests as of the close of the last trading day of the preceding month. Any losses allocated to the Managing Owner (as the owner of the General Shares) which are in excess of the Managing Owner’s capital balance are allocated to the Shareholders in accordance with their respective interest in the Fund as a percentage of total shareholders’ equity. Distributions (other than redemption of units) may be made at the sole discretion of the Managing Owner on a pro rata basis in accordance with the respective capital balances of the shareholders.
	No distributions were paid for the Years Ended December 31, 2014, 2013 and 2012.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	(9) Commitments and Contingencies
	The Managing Owner, either in its own capacity or in its capacity as the Managing Owner and on behalf of the Fund, has entered into various service agreements that contain a variety of representations, or provide indemnification provisions related to certain risks service providers undertake in performing services which are in the best interests of the Fund. As of December 31, 2014 and 2013, no claims had been received by the Fund. Further, the Fund has not had prior claims or losses pursuant to these contracts. Accordingly, the Managing Owner expects the risk of loss to be remote.

Net_Asset_Value_and_Financial_

Net Asset Value and Financial Highlights	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Asset Value and Financial Highlights	(10) Net Asset Value and Financial Highlights
	The Fund is presenting the following net asset value and financial highlights related to investment performance for a Share outstanding for the Years Ended December 31, 2014, 2013 and 2012. The net investment income and total expense ratios are calculated using average net asset value. The net asset value presentation is calculated using average daily Shares outstanding. The total return is based on the change in net asset value of the Shares during the period. An individual investor’s return and ratios may vary based on the timing of capital transactions.
	Net asset value per Share is the net asset value of the Fund divided by the number of outstanding Shares at the date of each respective period presented.
		Year Ended			Year Ended			Year Ended
		December 31,			December 31,			December 31,
		2014			2013			2012
	Net Asset Value
	Net asset value per Share, beginning of period	$	25.61		$	27.72		$	26.83
	Net realized and change in unrealized gain (loss) from United States Treasury Obligations and Futures		(7.00	)		(1.90	)		1.11
	Net investment income (loss)		(0.21	)		(0.21	)		(0.22	)
	Net increase (decrease)		(7.21	)		(2.11	)		0.89
	Net asset value per Share, end of period	$	18.4		$	25.61		$	27.72
	Market value per Share, beginning of period	$	25.66		$	27.78		$	26.84
	Market value per Share, end of period	$	18.45		$	25.66		$	27.78
	Ratio to average Net Assets
	Net investment income (loss)		(0.84	)%		(0.82	)%		(0.81	)%
	Total expenses		0.88	%		0.87	%		0.87	%
	Total Return, at net asset value		(28.15	)%		(7.61	)%		3.32	%
	Total Return, at market value		(28.10	)%		(7.63	)%		3.5	%

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	(11) Selected Quarterly Financial Data (Unaudited)
	The following summarized (unaudited) quarterly financial information presents the results of operations and other data for three month periods ended March 31, June 30, September 30 and December 31, 2014 and 2013.
		For the			For the			For the			For the
		Three Months Ended			Three Months Ended			Three Months Ended			Three Months Ended
		March 31, 2014			June 30, 2014			September 30, 2014			December 31, 2014
	Interest Income	$	724,958		$	524,601		$	393,691		$	197,467
	Net investment income (loss)	$	(11,236,715	)	$	(11,884,778	)	$	(11,692,219	)	$	(10,384,256	)
	Net realized and net change in unrealized gains/(losses) on United States Treasury Obligations and Futures	$	117,216,884		$	95,941,950		$	(714,455,704	)	$	(1,057,518,645	)
	Net Income/(loss)	$	105,980,169		$	84,057,172		$	(726,147,923	)	$	(1,067,902,901	)
	Increase/(decrease) in Net Asset Value	$	(41,841,373	)	$	(8,601,736	)	$	(648,882,846	)	$	(960,725,096	)
	Net Income (loss) per Share	$	0.52		$	0.4		$	(3.31	)	$	(4.82	)
		For the			For the			For the			For the
		Three Months Ended			Three Months Ended			Three Months Ended			Three Months Ended
		March 31, 2013			June 30, 2013			September 30, 2013			December 31, 2013
	Interest Income	$	1,283,133		$	883,702		$	673,579		$	402,660
	Net investment income (loss)	$	(13,395,179	)	$	(13,229,972	)	$	(13,514,023	)	$	(13,046,957	)
	Net realized and net change in unrealized gains/(losses) on United States Treasury Obligations and Futures	$	(87,712,797	)	$	(534,632,947	)	$	176,525,355		$	(37,735,888	)
	Net Income/(loss)	$	(101,107,976	)	$	(547,862,919	)	$	163,011,332		$	(50,782,845	)
	Increase/(decrease) in Net Asset Value	$	185,654,866		$	(726,369,365	)	$	391,935,214		$	(762,284,663	)
	Net Income (loss) per Share	$	(0.39	)	$	(2.22	)	$	0.7		$	(0.20	)

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	(12) Subsequent Events
	See Note 1 above regarding the transaction under which DBCS agreed to transfer and sell to Invesco all of DBCS’ interest in the Fund, including the sole and exclusive power to direct the business and affairs of the Fund, as well as certain other assets pertaining to the management of the Fund, pursuant to the terms and conditions of a certain Asset Purchase Agreement.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Basis of Presentation

(a) Basis of Presentation

The financial statements of the Fund have been prepared using U.S. generally accepted accounting principles (“U.S. GAAP”).

In June 2013, the Financial Accounting Standards Board (“FASB”) issued updated guidance clarifying the characteristics of an investment company and requiring new disclosures. Under the guidance, all entities regulated under the Investment Company Act of 1940 automatically qualify as investment companies, while all other entities need to consider both the fundamental and typical characteristics of an investment company in determining whether they qualify as investment companies. This new guidance is effective for interim or annual reporting periods that begin after December 15, 2013, and should be applied prospectively. The Fund adopted this guidance effective January 1, 2014. The Fund has determined that it meets the definition of an investment company and has prepared the financial statements in conformity with accounting and reporting guidance of the FASB Accounting Standards Codification Topic 946 – Investment Companies, which is part of U.S. GAAP. The adoption of this guidance had no effect on the Fund’s statements of financial condition, including the schedule of investments, and the related statements of income and expenses, changes in shareholders’ equity and of cash flows.

In August 2014, the FASB issued a new standard, Accounting Standards Update No. 2014-15 Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which will explicitly require management to assess an entity’s ability to continue as a going concern and to provide related footnote disclosure in certain circumstances. This new guidance is effective for all entities in the first annual reporting period ending after December 15, 2016. The Fund is currently evaluating this guidance and its impact on the Fund’s financial statement disclosures.

Use of Estimates

(b) Use of Estimates

The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses and related disclosure of contingent assets and liabilities during the reporting period of the financial statements and accompanying notes. Actual results could differ from those estimates. There were no significant estimates used in the preparation of these financial statements.

Financial Instruments and Fair Value

(c) Financial Instruments and Fair Value

United States Treasury Obligations and commodity futures contracts are recorded in the statements of financial condition on a trade date basis at fair value with changes in fair value recognized in earnings in each period. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price). The brokerage agreement with the Commodity Broker provides for the net settlement of all financial instruments covered by the agreement in the event of default or termination of any one contract.

Financial Accounting Standards Board (FASB) Accounting Standards Codification fair value measurement and disclosure guidance requires a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below:

Basis of Fair Value Measurement

Level 1:

Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2:

Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly;

Level 3:

Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

In determining fair value of United States Treasury Obligations and non-LME commodity futures contracts, the Fund uses unadjusted quoted market prices in active markets. United States Treasury Obligations and non-LME commodity futures contracts are classified within Level 1 of the fair value hierarchy. The Fund does not adjust the quoted prices for United States Treasury Obligations and commodity futures contracts.

In determining fair value of LME commodity futures contracts, the Fund uses valuation pricing based on action of a committee that incorporates prices from the most liquid trading sessions of the day and can also rely on other inputs such as trades, bids and offers (including indicative bids and offers) transacted throughout the whole day. During the year ended December 31, 2013, management changed the classification of LME commodity futures from Level 1 to Level 2.

Assets and Liabilities Measured at Fair Value as of December 31, 2014 were as follows:

Level 1

Level 2

Total

United States Treasury Obligations

$

4,977,853,691

—

$

4,977,853,691

Commodity Futures Contracts

$

(741,057,657

)

$

(34,100,007

)

$

(775,157,664

)

Assets and Liabilities Measured at Fair Value as of December 31, 2013 were as follows:

Level 1

Level 2

Total

United States Treasury Obligations

$

6,639,612,594

—

$

6,639,612,594

Commodity Futures Contracts

$

56,755,799

$

(19,503,125

)

$

37,252,674

There were no Level 3 holdings during the years ended December 31, 2014 and 2013. The Fund’s policy is to recognize transfers in and out of the valuation levels as of the end of the reporting period. Futures contracts in a net depreciation position of 19,503,125 were transferred from Level 1 to Level 2 during the year ended December 31, 2013 as described above.

Deposits with Commodity Broker

(d) Deposits with Commodity Broker

The Fund deposits cash and United States Treasury Obligations with its Commodity Broker subject to CFTC regulations and various exchange and broker requirements. The combination of the Fund’s deposits with its Commodity Broker of cash and United States Treasury Obligations and the unrealized profit or loss on open futures contracts (variation margin) represents the Fund’s overall equity in its broker trading account. To meet the Fund’s initial margin requirements, the Fund holds United States Treasury Obligations. The Fund uses its cash held by the Commodity Broker to satisfy variation margin requirements. The Fund earns interest on its cash deposited with the Commodity Broker.

United States Treasury Obligations

(e) United States Treasury Obligations

The Fund records purchases and sales of United States Treasury Obligations on a trade date basis. These holdings are marked to market based on quoted market closing prices. The Fund holds United States Treasury Obligations for deposit with the Fund’s Commodity Broker to meet margin requirements and for trading purposes. Interest income is recognized on an accrual basis when earned. Premiums and discounts are amortized or accreted over the life of the United States Treasury Obligations. The Fund purchased $899,000,000 face amount of United States Treasury Obligations valued at $898,921,337 which was recorded as payable for securities purchased as of December 31, 2014. The Fund purchased $1,089,000,000 face amount of United States Treasury Obligations valued at $1,088,821,071 which was recorded as payable for securities purchased as of December 31, 2013.

Cash Held by Commodity Broker

(f) Cash Held by Commodity Broker

The Fund’s arrangement with the Commodity Broker requires the Fund to meet its variation margin requirement related to the price movements, both positive and negative, on futures contracts held by the Fund by keeping cash on deposit with the Commodity Broker. The Fund defines cash and cash equivalents to be highly liquid investments, with original maturities of three months or less, when purchased. As of December 31, 2014 and 2013, the Fund had cash held with the Commodity Broker of $745,587,142, and $123,072,778, respectively. There were no cash equivalents held by the Fund as of December 31, 2014 and 2013.

Receivable/ (Payable) for LME Contracts

(g) Receivable/ (Payable) for LME Contracts

The Fund trades aluminum, copper and zinc commodity future contracts on the London Metals Exchange (“LME”). For settlement of futures contracts traded on the LME, cash is not transferred until the settled futures contracts expire. As of December 31, 2014 and 2013, the Fund had a payable to the Commodity Broker of $9,890,331 and $10,356,375, respectively, related to net realized losses on LME contracts which have been closed out but the contract is not yet expired.

Income Taxes

(h) Income Taxes

The Fund is classified as a partnership for U.S. federal income tax purposes. Accordingly, the Fund will not incur U.S. federal income taxes. No provision for federal, state, and local income taxes has been made in the accompanying financial statements, as investors are individually liable for income taxes, if any, on their allocable share of the Fund’s income, gain, loss, deductions and other items.

Management of the Fund has reviewed all open tax years and major jurisdictions and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Funds are also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management will monitor its tax positions taken under the interpretation (and consult with its tax counsel from time to time when appropriate) to determine if adjustments to conclusions are necessary based on factoring including, but not limited to, on-going analysis of tax law, regulation, and interpretations thereof. The major tax jurisdiction for the Fund and the earliest tax year subject to examination: United States, 2010.

Futures Contracts

(i) Futures Contracts

All commodity futures contracts are held and used for trading purposes. Commodity futures contracts are recorded on a trade date basis and open contracts are recorded in the statement of financial condition at fair value on the last business day of the period, which represents market value for those commodity futures contracts for which market quotes are readily available. However, when market closing prices are not available, the Managing Owner may value an asset of the Fund pursuant to policies the Managing Owner has adopted, which are consistent with normal industry standards. Realized gains (losses) and changes in unrealized appreciation (depreciation) on open positions are determined on a specific identification basis and recognized in the statement of income and expenses in the period in which the contract is closed or the changes occur, respectively. For the years ended December 31, 2014 and 2013, the average monthly notional market value of futures contracts held was $5.5 billion and $6.6 billion, respectively.

The Fair Value of Derivative Instruments as of December 31, 2014 is as follows:

Derivatives not Accounted for as

Statements of Financial Condition Location

Net Unrealized

Hedging Instruments

Appreciation /

(Depreciation)

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

(775,157,664

)

The Fair Value of Derivative Instruments as of December 31, 2013 is as follows:

Derivatives not Accounted for as

Statements of Financial Condition Location

Net Unrealized

Hedging Instruments

Appreciation /

(Depreciation)

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

37,252,674

The Effect of Derivative Instruments on the Statements of Income and Expenses is as follows:

For the Year Ended

For the Year Ended

For the Year Ended

December 31, 2014

December 31, 2013

December 31, 2012

Derivatives not

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Realized Gain

Change in

Accounted for as

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Hedging Instruments

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Recognized in

Income

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(746,348,836

)

—

$

(447,211,586

)

—

$

(257,726,563

)

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

(812,410,338

)

—

$

(36,200,984

)

—

$

449,677,202

The Fund utilizes derivative instruments to achieve its investment objective. For financial reporting purposes, the Fund offsets financial assets and financial liabilities that are subject to netting arrangements. In order for an arrangement to be eligible for netting, the Fund must have a basis to conclude that such netting arrangements are legally enforceable. The following table presents derivative instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements as of December 31, 2014, net by contract:

Gross Amounts Not Offset in the

Statement of Financial Condition

Gross Amounts

Gross Amounts

Net Amounts

Financial

Cash Collateral

Net

Recognized

Offset in the

Presented in

Instruments*

Pledged*

Amount

Statement of

the Statement of

Financial Condition

Financial Condition

Assets

Commodity Futures Contracts

$

19,310,401

$

(19,310,401

)

$

—

$

—

$

—

$

—

Liabilities

Commodity Futures Contracts

$

(794,468,065

)

$

19,301,401

$

(775,157,664

)

$

29,570,522

$

745,587,142

$

—

The following table presents derivative instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements as of December 31, 2013:

Gross Amounts Not Offset in the

Statement of Financial Condition

Gross Amounts

Gross Amounts

Net Amounts

Financial

Cash Collateral

Net Amount

Recognized

Offset in the

Presented in

Instruments*

Pledged*

Statement of

the Statement of

Financial Condition

Financial Condition

Assets

Commodity Futures Contracts

$

180,119,798

$

(142,867,124

)

$

37,252,674

$

—

$

—

$

37,252,674

Liabilities

Commodity Futures Contracts

$

(142,867,124

)

$

142,867,124

$

—

$

—

$

—

$

—

*

As of December 31, 2014 and December 31, 2013, a portion of the Fund’s cash and US Treasury Obligations were required to be deposited as margin in support of the Fund’s futures positions as described in Note 3.

The Managing Owner will utilize the cash held at the commodity broker to offset any realized losses incurred in the commodity futures contracts, if available. To the extent that cash held at the commodity broker is not adequate to cover any realized losses, a portion of the United States Treasury Bills will be sold to make additional cash available.

Brokerage Commissions and Fees

(j) Brokerage Commissions and Fees

The Fund incurs all brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities by the Commodity Broker. These costs are recorded as brokerage commissions and fees in the statement of income and expenses as incurred. The Commodity Broker’s brokerage commissions and trading fees are determined on a contract-by-contract basis. On average, total charges paid to the Commodity Broker were less than $10.00 per round-turn trade for the Years Ended December 31, 2014, 2013 and 2012.

Routine Operational, Administrative and Other Ordinary Expenses

(k) Routine Operational, Administrative and Other Ordinary Expenses

Effective as of the Closing Date, the Managing Owner assumes all routine operational, administrative and other ordinary expenses of the Fund, including, but not limited to, computer services, the fees and expenses of the Trustee, legal and accounting fees and expenses, tax preparation expenses, filing fees and printing, mailing and duplication costs. For purposes of the reporting period of this Form 10-K and up to the Closing Date, the Predecessor Managing Owner assumed all routine operational, administrative and other ordinary expenses of the Fund. Accordingly, all such expenses are not reflected in the statement of income and expenses of the Fund.

Organizational and Offering Costs

(l) Organizational and Offering Costs

Prior to the Closing Date, all organizational and offering expenses (including continuous offering expenses for the offering of the Shares) incurred by the Fund was assumed by the Predecessor Managing Owner. Effective as of the Closing Date, all offering expenses (including continuous offering expenses for the offering of the Shares) incurred by the Fund were assumed by the Managing Owner. The Fund is not responsible to either the Predecessor Managing Owner or the Managing Owner for the reimbursement of organizational and offering costs (including continuous offering expenses for the offering of the Shares).

Non-Recurring Fees and Expenses

(m) Non-Recurring Fees and Expenses

The Fund pays all non-recurring and unusual fees and expenses (referred to as extraordinary fees and expenses in the Trust Declaration), if any, of itself, as determined by the Managing Owner. Non-recurring and unusual fees and expenses are fees and expenses which are non-recurring and unusual in nature, such as legal claims and liabilities, litigation costs or indemnification or other unanticipated expenses. Such non-recurring and unusual fees and expenses, by their nature, are unpredictable in terms of timing and amount. For the Years Ended December 31, 2014, 2013 and 2012, the Fund did not incur such expenses.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Assets and Liabilities Measured at Fair Value	Assets and Liabilities Measured at Fair Value as of December 31, 2014 were as follows:
			Level 1				Level 2				Total
	United States Treasury Obligations		$	4,977,853,691				—			$	4,977,853,691
	Commodity Futures Contracts		$	(741,057,657	)		$	(34,100,007	)		$	(775,157,664	)
	Assets and Liabilities Measured at Fair Value as of December 31, 2013 were as follows:
			Level 1				Level 2				Total
	United States Treasury Obligations		$	6,639,612,594				—			$	6,639,612,594
	Commodity Futures Contracts		$	56,755,799			$	(19,503,125	)		$	37,252,674
Fair Value of Derivative Instruments and Effect of Derivative Instruments on Statements of Income and Expenses	The Fair Value of Derivative Instruments as of December 31, 2014 is as follows:
	Derivatives not Accounted for as		Statements of Financial Condition Location		Net Unrealized
	Hedging Instruments				Appreciation /
					(Depreciation)
	Commodity Futures Contracts		Net Unrealized Appreciation (Depreciation) on Futures Contracts		$	(775,157,664	)
	The Fair Value of Derivative Instruments as of December 31, 2013 is as follows:
	Derivatives not Accounted for as		Statements of Financial Condition Location		Net Unrealized
	Hedging Instruments				Appreciation /
					(Depreciation)
	Commodity Futures Contracts		Net Unrealized Appreciation (Depreciation) on Futures Contracts		$	37,252,674
	The Effect of Derivative Instruments on the Statements of Income and Expenses is as follows:
					For the Year Ended								For the Year Ended								For the Year Ended
					December 31, 2014								December 31, 2013								December 31, 2012
	Derivatives not		Location of Gain or (Loss) on		Realized Gain				Change in				Realized Gain				Change in				Realized Gain				Change in
	Accounted for as		Derivatives Recognized in Income		or (Loss) on				Unrealized Gain				or (Loss) on				Unrealized Gain				or (Loss) on				Unrealized Gain
	Hedging Instruments				Derivatives				or (Loss) on				Derivatives				or (Loss) on				Derivatives				or (Loss) on
					Recognized in				Derivatives				Recognized in				Derivatives				Recognized in				Derivatives
					Income				Recognized in				Income				Recognized in				Income				Recognized in
									Income								Income								Income
	Commodity Futures Contracts		Net Realized Gain (Loss) on Futures		$	(746,348,836	)			—			$	(447,211,586	)			—			$	(257,726,563	)			—
			Net Change in Unrealized Gain (Loss) on Futures			—			$	(812,410,338	)			—			$	(36,200,984	)			—			$	449,677,202
Summary of Derivative Instruments Subject to Enforceable Netting Agreement or Offset by Collateral Arrangements	The following table presents derivative instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements as of December 31, 2014, net by contract:
															Gross Amounts Not Offset in the
															Statement of Financial Condition
			Gross Amounts				Gross Amounts				Net Amounts				Financial				Cash Collateral				Net
			Recognized				Offset in the				Presented in				Instruments*				Pledged*				Amount
							Statement of				the Statement of
							Financial Condition				Financial Condition
	Assets
	Commodity Futures Contracts		$	19,310,401			$	(19,310,401	)		$	—			$	—			$	—			$	—
	Liabilities
	Commodity Futures Contracts		$	(794,468,065	)		$	19,301,401			$	(775,157,664	)		$	29,570,522			$	745,587,142			$	—
	The following table presents derivative instruments that are either subject to an enforceable netting agreement or offset by collateral arrangements as of December 31, 2013:
															Gross Amounts Not Offset in the
															Statement of Financial Condition
			Gross Amounts				Gross Amounts				Net Amounts				Financial				Cash Collateral				Net Amount
			Recognized				Offset in the				Presented in				Instruments*				Pledged*
							Statement of				the Statement of
							Financial Condition				Financial Condition
	Assets
	Commodity Futures Contracts		$	180,119,798			$	(142,867,124	)		$	37,252,674			$	—			$	—			$	37,252,674
	Liabilities
	Commodity Futures Contracts		$	(142,867,124	)		$	142,867,124			$	—			$	—			$	—			$	—
	*	As of December 31, 2014 and December 31, 2013, a portion of the Fund’s cash and US Treasury Obligations were required to be deposited as margin in support of the Fund’s futures positions as described in Note 3.

Net_Asset_Value_and_Financial_1

Net Asset Value and Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Asset Value	Net asset value per Share is the net asset value of the Fund divided by the number of outstanding Shares at the date of each respective period presented.
		Year Ended			Year Ended			Year Ended
		December 31,			December 31,			December 31,
		2014			2013			2012
	Net Asset Value
	Net asset value per Share, beginning of period	$	25.61		$	27.72		$	26.83
	Net realized and change in unrealized gain (loss) from United States Treasury Obligations and Futures		(7.00	)		(1.90	)		1.11
	Net investment income (loss)		(0.21	)		(0.21	)		(0.22	)
	Net increase (decrease)		(7.21	)		(2.11	)		0.89
	Net asset value per Share, end of period	$	18.4		$	25.61		$	27.72
	Market value per Share, beginning of period	$	25.66		$	27.78		$	26.84
	Market value per Share, end of period	$	18.45		$	25.66		$	27.78
	Ratio to average Net Assets
	Net investment income (loss)		(0.84	)%		(0.82	)%		(0.81	)%
	Total expenses		0.88	%		0.87	%		0.87	%
	Total Return, at net asset value		(28.15	)%		(7.61	)%		3.32	%
	Total Return, at market value		(28.10	)%		(7.63	)%		3.5	%

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Summarized (Unaudited) Quarterly Financial Information	The following summarized (unaudited) quarterly financial information presents the results of operations and other data for three month periods ended March 31, June 30, September 30 and December 31, 2014 and 2013.
		For the			For the			For the			For the
		Three Months Ended			Three Months Ended			Three Months Ended			Three Months Ended
		March 31, 2014			June 30, 2014			September 30, 2014			December 31, 2014
	Interest Income	$	724,958		$	524,601		$	393,691		$	197,467
	Net investment income (loss)	$	(11,236,715	)	$	(11,884,778	)	$	(11,692,219	)	$	(10,384,256	)
	Net realized and net change in unrealized gains/(losses) on United States Treasury Obligations and Futures	$	117,216,884		$	95,941,950		$	(714,455,704	)	$	(1,057,518,645	)
	Net Income/(loss)	$	105,980,169		$	84,057,172		$	(726,147,923	)	$	(1,067,902,901	)
	Increase/(decrease) in Net Asset Value	$	(41,841,373	)	$	(8,601,736	)	$	(648,882,846	)	$	(960,725,096	)
	Net Income (loss) per Share	$	0.52		$	0.4		$	(3.31	)	$	(4.82	)
		For the			For the			For the			For the
		Three Months Ended			Three Months Ended			Three Months Ended			Three Months Ended
		March 31, 2013			June 30, 2013			September 30, 2013			December 31, 2013
	Interest Income	$	1,283,133		$	883,702		$	673,579		$	402,660
	Net investment income (loss)	$	(13,395,179	)	$	(13,229,972	)	$	(13,514,023	)	$	(13,046,957	)
	Net realized and net change in unrealized gains/(losses) on United States Treasury Obligations and Futures	$	(87,712,797	)	$	(534,632,947	)	$	176,525,355		$	(37,735,888	)
	Net Income/(loss)	$	(101,107,976	)	$	(547,862,919	)	$	163,011,332		$	(50,782,845	)
	Increase/(decrease) in Net Asset Value	$	185,654,866		$	(726,369,365	)	$	391,935,214		$	(762,284,663	)
	Net Income (loss) per Share	$	(0.39	)	$	(2.22	)	$	0.7		$	(0.20	)

Background_Additional_Informat

Background - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Purchase agreement transaction date	23-Feb-15

Organization_Additional_Inform

Organization - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2014	23-May-05	Dec. 31, 2013
	Basket
Organization [Line Items]
General shares, shares issued	40		40
Fund offered common units to authorized participants in number of basket	1
Number of shares issued per basket	200,000
PowerShares DB Commodity Index Tracking Fund [Member]
Organization [Line Items]
Partners' capital contribution		$1,000
General shares, shares issued		40

Fund_Investment_Overview_Addit

Fund Investment Overview - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Investment [Abstract]
Deposit with Commodity Broker	$4,948,283,169	$6,799,938,046
Percentage of assets held by broker	100.00%	100.00%
Cash and United States Treasury Obligations deposited as margin in support of the Fund's long futures positions	$272,407,319	$297,808,276
Percentage of cash and United States Treasury Obligations deposited as margin in support of the Fund's long futures positions	5.51%	4.38%

Service_Providers_and_Related_1

Service Providers and Related Party Agreements - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Management fee percentage per annum of daily net asset	0.85%
Management Fees	$45,609,981	$54,985,133	$52,794,819
Management Fees payable	3,042,481	4,283,639
Brokerage Commissions and Fees	1,428,704	1,444,072	1,471,822
Brokerage fee payable	4,575	1,465
Deutsche Bank Securities Inc. [Member]
Related Party Transaction [Line Items]
Brokerage Commissions and Fees	1,428,704	1,444,072	1,471,822
Brokerage fee payable	$4,575	$1,465

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Assets and Liabilities Measured at Fair Value (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$4,977,853,691	$6,639,612,594
Commodity Futures Contracts	-775,157,664	37,252,674
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	4,977,853,691	6,639,612,594
Commodity Futures Contracts	-741,057,657	56,755,799
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Futures Contracts	($34,100,007)	($19,503,125)

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Futures contracts in a net depreciation position transferred from Level 1 to Level 2		$19,503,125
Payable for securities purchased	898,921,337	1,088,821,071
Cash held with the Commodity Broker	745,587,142	123,072,778	615,720,406	542,289,641
Cash equivalents held	0	0
Cash and cash equivalents, original maturities, maximum number of months	3 months	3 months
Payable to the Commodity Broker for LME Contract	9,890,331	10,356,375
Average notional market value	5,500,000,000	6,600,000,000
Average charges paid to broker per round-turn trade, maximum	10	10	10
US Treasury Securities Purchased But Not Yet Paid [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Face amount of debt purchased	899,000,000	1,089,000,000
Payable for securities purchased	898,921,337	1,088,821,071
Level 3 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets and liabilities measured at fair value	$0	$0

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Fair Value of Derivative Instruments and Effect of Derivative Instruments on Statements of Income and Expenses (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net unrealized appreciation (depreciation) on futures contracts	($775,157,664)	$37,252,674
Net Realized Gain (Loss) on Futures	-746,348,836	-447,211,586	-257,726,563
Net Change in Unrealized Gain (Loss) on Futures	($812,410,338)	($36,200,984)	$449,677,202

Summary_of_Significant_Account6

Summary of Significant Accounting Policies - Derivative Instruments Subject to Enforceable Netting Agreement or Offset by Collateral Arrangements (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Offsetting Derivative Assets [Abstract]
Gross Amounts of Recognized Assets	$19,310,401	$180,119,798
Gross Amounts Offset Assets in the Statement of Financial Condition Assets	-19,310,401	-142,867,124
Net Amounts of Assets Presented in the Statement of Financial Condition		37,252,674
Gross Amounts Not Offset in the Statement of Financial Condition - Financial Instruments Assets	0	0
Gross Amounts Not Offset in the Statement of Financial Condition - Cash Collateral Pledged Assets	0	0
Assets Net Amount		37,252,674
Gross Amount of Recognized Liabilities	-794,468,065	-142,867,124
Gross Amount Offset Liabilities in the Statement of Financial Condition	19,301,401	142,867,124
Net Amounts of Liabilities Presented in the Statement of Financial Condition	-775,157,664
Gross Amount Not Offset In The Statement of Financial Condition - Financial Instruments Liabilities	29,570,522
Gross Amount Not Offset In The Statement of Financial Condition - Cash Collateral Pledged Liabilities	745,587,142
Liabilities Net Amount	$0	$0

Share_Purchases_and_Redemption1

Share Purchases and Redemptions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Basket
Equity [Abstract]
Minimum number of Baskets that can be purchased	1
Shares redeemed	200,000
Minimum number of Baskets that can be redeemed	1

Profit_and_Loss_Allocations_an1

Profit and Loss Allocations and Distributions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Distributed earnings	$0	$0	$0

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (Indemnification Agreement [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Claim	Claim
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Claims received by fund	0	0

Net_Asset_Value_and_Financial_2

Net Asset Value and Financial Highlights - Net Asset Value (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Asset Value
Net asset value per Share, beginning of period	$25.61	$27.72	$26.83
Net realized and change in unrealized gain (loss) from United States Treasury Obligations and Futures	($7)	($1.90)	$1.11
Net investment income (loss)	($0.21)	($0.21)	($0.22)
Net increase (decrease)	($7.21)	($2.11)	$0.89
Net asset value per Share, end of period	$18.40	$25.61	$27.72
Market value per Share, beginning of period	$25.66	$27.78	$26.84
Market value per Share, end of period	$18.45	$25.66	$27.78
Ratio to average Net Assets
Net investment income (loss)	-0.84%	-0.82%	-0.81%
Total expenses	0.88%	0.87%	0.87%
Total Return, at net asset value	-28.15%	-7.61%	3.32%
Total Return, at market value	-28.10%	-7.63%	3.50%

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) - Schedule of Summarized (Unaudited) Quarterly Financial Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Interest Income	$197,467	$393,691	$524,601	$724,958	$402,660	$673,579	$883,702	$1,283,133	$1,840,717	$3,243,074	$4,070,308
Net investment income (loss)	-10,384,256	-11,692,219	-11,884,778	-11,236,715	-13,046,957	-13,514,023	-13,229,972	-13,395,179	-45,197,968	-53,186,131	-50,196,333
Net realized and net change in unrealized gains/(losses) on United States Treasury Obligations and Futures	-1,057,518,645	-714,455,704	95,941,950	117,216,884	-37,735,888	176,525,355	-534,632,947	-87,712,797	-1,558,815,515	-483,556,277	192,325,598
Net Income/(loss)	-1,067,902,901	-726,147,923	84,057,172	105,980,169	-50,782,845	163,011,332	-547,862,919	-101,107,976	-1,604,013,483	-536,742,408	142,129,265
Increase/(decrease) in Net Asset Value	($960,725,096)	($648,882,846)	($8,601,736)	($41,841,373)	($762,284,663)	$391,935,214	($726,369,365)	$185,654,866
Net Income (loss) per Share	($4.82)	($3.31)	$0.40	$0.52	($0.20)	$0.70	($2.22)	($0.39)