Invesco DB US Dollar Index Bearish Fund (UDN) 10-Q 5 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013
Document And Entity Information [Abstract]	'
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'Q3
Trading Symbol	'udn
Entity Registrant Name	'POWERSHARES DB US DOLLAR INDEX BEARISH FUND
Entity Central Index Key	'0001383149
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Accelerated Filer
Entity Common Stock, Shares Outstanding	2,400,000

Statements_of_Financial_Condit

Statements of Financial Condition (USD $)	Sep. 30, 2013	Dec. 31, 2012
Assets	'	'
United States Treasury Obligations, at fair value (cost $65,998,371 and $72,992,114 respectively)	$65,999,071	$72,995,469
Cash held by commodity broker	2,900,378	19,586,191
Net unrealized appreciation (depreciation) on futures contracts	1,070,832	-21,654
Deposits with commodity broker	69,970,281	92,560,006
Total assets	69,970,281	92,560,006
Liabilities	'	'
Payable for securities purchased	4,999,874	'
Management fee payable	40,056	61,918
Brokerage fee payable	879	160
Total liabilities	5,040,809	62,078
Commitments and Contingencies (Note 9)	'	'
Equity	'	'
Shareholders' equity-General Shares	1,082	1,088
Shareholders' equity-Shares	64,928,390	92,496,840
Total shareholders' equity	64,929,472	92,497,928
Total liabilities and equity	$69,970,281	$92,560,006
General Shares outstanding	40	40
Shares outstanding	2,400,000	3,400,000
Net asset value per share	'	'
General Shares	$27.05	$27.20
Shares	$27.05	$27.20

Statements_of_Financial_Condit1

Statements of Financial Condition (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]	'	'
United States treasury obligations, cost	$65,998,371	$72,992,114

Schedule_of_Investments_Treasu

Schedule of Investments - Treasury (USD $)	Sep. 30, 2013	Dec. 31, 2012
U.S. Treasury Bills, 0.02% due October 3, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	7.71%	'
Fair Value	$4,999,995	'
Face Value	5,000,000	'
U.S. Treasury Bills, 0.03% due October 10, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	10.78%	'
Fair Value	6,999,972	'
Face Value	7,000,000	'
U.S. Treasury Bills, 0.04% due October 17, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	20.02%	'
Fair Value	12,999,883	'
Face Value	13,000,000	'
U.S. Treasury Bills, 0.05% due November 21, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	1.54%	'
Fair Value	999,981	'
Face Value	1,000,000	'
U.S. Treasury Bills, 0.02% due December 12, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	38.50%	'
Fair Value	24,999,500	'
Face Value	25,000,000	'
U.S. Treasury Bills, 0.02% due December 26, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	15.40%	'
Fair Value	9,999,820	'
Face Value	10,000,000	'
U.S. Treasury Bills, 0.01% due January 2, 2014 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	7.70%	'
Fair Value	4,999,920	'
Face Value	5,000,000	'
Total United States Treasury Obligations [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	101.65%	78.92%
Fair Value	65,999,071	72,995,469
U.S. Treasury Bills, 0.05% due January 10, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	7.57%
Fair Value	'	6,999,958
Face Value	'	7,000,000
U.S. Treasury Bills, 0.015% due January 17, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	1.08%
Fair Value	'	999,993
Face Value	'	1,000,000
U.S. Treasury Bills, 0.105% due February 14, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	2.16%
Fair Value	'	1,999,934
Face Value	'	2,000,000
U.S. Treasury Bills, 0.09% due February 21, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	4.33%
Fair Value	'	3,999,848
Face Value	'	4,000,000
U.S. Treasury Bills, 0.09% due March 14, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	1.08%
Fair Value	'	999,936
Face Value	'	1,000,000
U.S. Treasury Bills, 0.04% due March 21, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	41.08%
Fair Value	'	37,997,340
Face Value	'	38,000,000
U.S. Treasury Bills, 0.085% due March 28, 2013 [Member]	'	'
Schedule of Investments [Line Items]	'	'
Percentage of Net Assets	'	21.62%
Fair Value	'	19,998,460
Face Value	'	$20,000,000

Schedule_of_Investments_Treasu1

Schedule of Investments - Treasury (Parenthetical) (USD $)

9 Months Ended

12 Months Ended

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

U.S. Treasury Bills, 0.02% due October 3, 2013 [Member]

U.S. Treasury Bills, 0.03% due October 10, 2013 [Member]

U.S. Treasury Bills, 0.04% due October 17, 2013 [Member]

U.S. Treasury Bills, 0.05% due November 21, 2013 [Member]

U.S. Treasury Bills, 0.02% due December 12, 2013 [Member]

U.S. Treasury Bills, 0.02% due December 26, 2013 [Member]

U.S. Treasury Bills, 0.01% due January 2, 2014 [Member]

Total United States Treasury Obligations [Member]

Total United States Treasury Obligations [Member]

U.S. Treasury Bills, 0.05% due January 10, 2013 [Member]

U.S. Treasury Bills, 0.015% due January 17, 2013 [Member]

U.S. Treasury Bills, 0.105% due February 14, 2013 [Member]

U.S. Treasury Bills, 0.09% due February 21, 2013 [Member]

U.S. Treasury Bills, 0.09% due March 14, 2013 [Member]

U.S. Treasury Bills, 0.04% due March 21, 2013 [Member]

U.S. Treasury Bills, 0.085% due March 28, 2013 [Member]

Schedule of Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

U.S. Treasury Bills - Interest Rate

0.02%

0.03%

0.04%

0.05%

0.02%

0.02%

0.01%

'

'

0.05%

0.02%

0.11%

0.09%

0.09%

0.04%

0.09%

U.S. Treasury Bills - Maturity Date

3-Oct-13

10-Oct-13

17-Oct-13

21-Nov-13

12-Dec-13

26-Dec-13

2-Jan-14

'

'

10-Jan-13

17-Jan-13

14-Feb-13

21-Feb-13

14-Mar-13

21-Mar-13

28-Mar-13

United States Treasury Obligations cost

'

'

'

'

'

'

'

$65,998,371

$72,992,114

'

'

'

'

'

'

'

Schedule_of_Investments_Future

Schedule of Investments - Futures Contracts (USD $)	Sep. 30, 2013		Dec. 31, 2012
ICE-US Dollar Index (793 contracts, settlement date December 16, 2013) [Member]	'		'
Schedule of Investments [Line Items]	'		'
Percentage of Net Assets	1.65%	[1]	'
Unrealized Appreciation/ (Depreciation)	$1,070,832	[1]	'
Notional Market Value	-63,696,139	[1]	'
ICE-US Dollar Index (1,173 contracts, settlement date March 18, 2013) [Member]	'		'
Schedule of Investments [Line Items]	'		'
Percentage of Net Assets	'		-0.02%	[1]
Unrealized Appreciation/ (Depreciation)	'		-21,654	[1]
Notional Market Value	'		-93,667,029	[1]
Total Futures Contracts [Member]	'		'
Schedule of Investments [Line Items]	'		'
Percentage of Net Assets	1.65%		-0.02%
Unrealized Appreciation/ (Depreciation)	1,070,832		-21,654
Notional Market Value	($63,696,139)		($93,667,029)
[1]	Positions represent futures contracts sold.

Schedule_of_Investments_Future1

Schedule of Investments - Futures Contracts (Parenthetical) (USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Schedule of Investments [Line Items]	'		'
Unrealized losses	$1,070,832		$90,960
Unrealized gains	$1,070,832		$69,306
ICE-US Dollar Index (793 contracts, settlement date December 16, 2013) [Member]	'		'
Schedule of Investments [Line Items]	'		'
Contracts	793	[1]	'
Settlement date	16-Dec-13	[1]	'
ICE-US Dollar Index (1,173 contracts, settlement date March 18, 2013) [Member]	'		'
Schedule of Investments [Line Items]	'		'
Contracts	'		1,173	[1]
Settlement date	'		18-Mar-13	[1]
[1]	Positions represent futures contracts sold.

Statements_of_Income_and_Expen

Statements of Income and Expenses (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income	'	'	'	'
Interest Income	$7,020	$13,623	$30,397	$32,063
Expenses	'	'	'	'
Management Fee	123,574	143,617	432,621	486,229
Brokerage Commissions and Fees	2,238	14,774	34,841	43,615
Total Expenses	125,812	158,391	467,462	529,844
Net investment income (loss)	-118,792	-144,768	-437,065	-497,781
Net Realized Gain (Loss) on	'	'	'	'
United States Treasury Obligations	89	226	2,106	152
Futures	-437,424	2,910,540	-1,899,006	2,447,411
Net realized gain (loss)	-437,335	2,910,766	-1,896,900	2,447,563
Net Change in Unrealized Gain (Loss) on	'	'	'	'
United States Treasury Obligations	-1,881	360	-2,655	3,985
Futures	3,155,758	-1,186,586	1,092,486	-1,347,609
Net change in unrealized gain (loss)	3,153,877	-1,186,226	1,089,831	-1,343,624
Net realized and net change in unrealized gain (loss) on United States Treasury Obligations and Futures	2,716,542	1,724,540	-807,069	1,103,939
Net Income (Loss)	$2,597,750	$1,579,772	($1,244,134)	$606,158

Statement_of_Changes_in_Shareh

Statement of Changes in Shareholders' Equity (USD $)	Total	General Shares [Member]	Shares [Member]	Total Equity [Member]	Total Equity [Member]
	USD ($)			General Shares [Member]	Shares [Member]
				USD ($)	USD ($)
Balance (in shares) at Jun. 30, 2012	'	40	2,800,000	'	'
Balance at Jun. 30, 2012	$74,537,326	'	'	$1,065	$74,536,261
Sale of Shares	16,287,382	'	'	'	16,287,382
Sale of Shares (in shares)	600,000	'	600,000	'	'
Redemption of Shares	-5,465,565	'	'	'	-5,465,565
Redemption of Shares (in shares)	'	'	-200,000	'	'
Net Income (Loss)	'	'	'	'	'
Net investment income (loss)	-144,768	'	'	-6	-144,762
Net realized gain (loss) on United States Treasury Obligations and Futures	2,910,766	'	'	53	2,910,713
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	-1,186,226	'	'	-25	-1,186,201
Net Income (Loss)	1,579,772	'	'	22	1,579,750
Balance (in shares) at Sep. 30, 2012	'	40	3,200,000	'	'
Balance at Sep. 30, 2012	86,938,915	'	'	1,087	86,937,828
Balance (in shares) at Dec. 31, 2011	'	40	3,800,000	'	'
Balance at Dec. 31, 2011	102,153,516	'	'	1,075	102,152,441
Sale of Shares	43,057,692	'	'	'	43,057,692
Sale of Shares (in shares)	1,600,000	'	1,600,000	'	'
Redemption of Shares	-58,878,451	'	'	'	-58,878,451
Redemption of Shares (in shares)	'	'	-2,200,000	'	'
Net Income (Loss)	'	'	'	'	'
Net investment income (loss)	-497,781	'	'	-9	-497,772
Net realized gain (loss) on United States Treasury Obligations and Futures	2,447,563	'	'	48	2,447,515
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	-1,343,624	'	'	-27	-1,343,597
Net Income (Loss)	606,158	'	'	12	606,146
Balance (in shares) at Sep. 30, 2012	'	40	3,200,000	'	'
Balance at Sep. 30, 2012	86,938,915	'	'	1,087	86,937,828
Balance (in shares) at Dec. 31, 2012	3,400,000	40	3,400,000	'	'
Balance at Dec. 31, 2012	92,497,928	'	'	1,088	92,496,840
Sale of Shares	5,457,806	'	'	'	5,457,806
Sale of Shares (in shares)	200,000	'	200,000	'	'
Redemption of Shares	-31,782,128	'	'	'	-31,782,128
Redemption of Shares (in shares)	'	'	-1,200,000	'	'
Net Income (Loss)	'	'	'	'	'
Net investment income (loss)	-437,065	'	'	-5	-437,060
Net realized gain (loss) on United States Treasury Obligations and Futures	-1,896,900	'	'	-22	-1,896,878
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	1,089,831	'	'	22	1,089,809
Net Income (Loss)	-1,244,134	'	'	-6	-1,244,128
Balance (in shares) at Sep. 30, 2013	2,400,000	40	2,400,000	'	'
Balance at Sep. 30, 2013	64,929,472	'	'	1,082	64,928,390
Balance (in shares) at Jun. 30, 2013	'	40	2,600,000	'	'
Balance at Jun. 30, 2013	67,656,500	'	'	1,041	67,655,459
Redemption of Shares	-5,324,778	'	'	'	-5,324,778
Redemption of Shares (in shares)	'	'	-200,000	'	'
Net Income (Loss)	'	'	'	'	'
Net investment income (loss)	-118,792	'	'	0	-118,792
Net realized gain (loss) on United States Treasury Obligations and Futures	-437,335	'	'	-4	-437,331
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures	3,153,877	'	'	46	3,153,831
Net Income (Loss)	2,597,750	'	'	41	2,597,709
Balance (in shares) at Sep. 30, 2013	2,400,000	40	2,400,000	'	'
Balance at Sep. 30, 2013	$64,929,472	'	'	$1,082	$64,928,390

Statements_of_Cash_Flows

Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net Income (Loss)	($1,244,134)	$606,158
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:	'	'
Cost of securities purchased	-207,971,215	-205,952,546
Proceeds from securities sold and matured	219,998,233	238,997,909
Net accretion of discount on United States Treasury Obligations	-31,295	-32,085
Net realized (gain) loss on United States Treasury Obligations	-2,106	-152
Net change in unrealized (gain) loss on United States Treasury Obligations and Futures	-1,089,831	1,343,624
Change in operating receivables and liabilities:	'	'
Management fee payable	-21,862	28,442
Brokerage fee payable	719	-1,700
Net cash provided by (used for) operating activities	9,638,509	34,989,650
Cash flows from financing activities:	'	'
Proceeds from sale of Shares	5,457,806	43,057,692
Redemption of Shares	-31,782,128	-58,878,451
Net cash provided by (used for) financing activities	-26,324,322	-15,820,759
Net change in cash held by broker	-16,685,813	19,168,891
Cash held by broker at beginning of period	19,586,191	1,577,141
Cash held by broker at end of period	$2,900,378	$20,746,032

Organization

Organization	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Organization	'
	(1) Organization
	PowerShares DB US Dollar Index Bearish Fund (the “Fund”), a separate series of PowerShares DB US Dollar Index Trust (the “Trust”), a Delaware statutory trust organized in two separate series, was formed on August 3, 2006. DB Commodity Services LLC, a Delaware limited liability company (“DBCS” or the “Managing Owner”), seeded the Fund with a capital contribution of $1,000 in exchange for 40 General Shares of the Fund. 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 for in the Fourth Amended and Restated Declaration of Trust and Trust Agreement of the Trust (the “Trust Agreement”).
	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 February 15, 2007. The Fund commenced trading on the American Stock Exchange (now known as the NYSE Alternext US LLC (the “NYSE Alternext”)) on February 20, 2007 and, as of November 25, 2008, is listed on the NYSE Arca, Inc. (the “NYSE Arca”).
	This Report covers the three months ended September 30, 2013 and 2012 (hereinafter referred to as the “Three Months Ended September 30, 2013” and the “Three Months Ended September 30, 2012”, respectively) and the nine months ended September 30, 2013 and 2012 (hereinafter referred to as the “Nine Months Ended September 30, 2013” and the “Nine Months Ended September 30, 2012”, respectively).
	The accompanying unaudited financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions for Form 10-Q and the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). In the opinion of management, all material adjustments, consisting only of normal recurring adjustments, considered necessary for a fair statement of the interim period financial statements have been made. Interim period results are not necessarily indicative of results for a full-year period. These financial statements and the notes thereto should be read in conjunction with the Fund’s financial statements included in its Annual Report on Form 10-K for the year ended December 31, 2012 as filed with the SEC on February 22, 2013.

Fund_Investment_Overview

Fund Investment Overview	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Fund Investment Overview	'
	(2) Fund Investment Overview
	The Fund establishes short positions in certain futures contracts (the “DX Contracts”) with a view to tracking the changes, whether positive or negative, in the level of the Deutsche Bank Short US Dollar Index (USDX®) Futures Index – Excess Return, the “Short Index” or the “Index”, over time. The performance of the Fund also is intended to reflect the excess, if any, of its 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 calculated to reflect the changes in market value over time, whether positive or negative, in short positions on DX Contracts. DX Contracts are traded through the currency markets of ICE Futures U.S. (formerly known as the New York Board of Trade®), under the symbol “DX.” The changes in market value over time, whether positive or negative, of the DX Contracts are related to the changes, whether positive or negative, in the level of the U.S. Dollar Index® (the “USDX®”). The Index provides a general indication of the international value of the U.S. dollar relative to the six major world currencies (the “Index Currencies”), which comprise the USDX® — Euro, Japanese Yen, British Pound, Canadian Dollar, Swedish Krona and Swiss Franc.
	The Fund does not employ leverage. As of September 30, 2013 and December 31, 2012, the Fund had $69,970,281 (or 100%) and $92,560,006 (or 100%), respectively, of its holdings of cash, United States Treasury Obligations and unrealized appreciation/depreciation on futures contracts on deposit with its Commodity Broker. Of this, $1,395,680 (or 1.99%) and $1,290,300 (or 1.39%), respectively, of the Fund’s holdings of cash and United States Treasury Obligations are required to be deposited as margin in support of the Fund’s short futures positions on DX Contracts. For additional information, please see the unaudited Schedule of Investments as of September 30, 2013 and the audited Schedule of Investments as of December 31, 2012 for details of the Fund’s portfolio holdings.

Service_Providers_and_Related_

Service Providers and Related Party Agreements	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
Service Providers and Related Party Agreements	'
	(3) 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 Trust and 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, and is an indirect wholly-owned subsidiary of Deutsche Bank AG. The Fund pays the Managing Owner a management fee (the “Management Fee”), monthly in arrears, in an amount equal to 0.75% per annum of the daily net asset value of the Fund. During the Three Months Ended September 30, 2013 and 2012, the Fund incurred Management Fees of $123,574 and $143,617, respectively. Management Fees incurred during the Nine Months Ended September 30, 2013 and 2012 by the Fund were $432,621 and $486,229, respectively. As of September 30, 2013 and December 31, 2012, Management Fees payable to the Managing Owner were $40,056 and $61,918, respectively.
	The Commodity Broker
	Deutsche Bank Securities Inc., a Delaware corporation, serves as the Fund’s futures clearing broker (the “Commodity Broker”). The Commodity Broker is an indirect wholly-owned subsidiary of Deutsche Bank AG and is an affiliate of the Managing Owner. In its capacity as clearing broker, the Commodity Broker executes and clears 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 Trust on behalf of 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 Three Months Ended September 30, 2013 and 2012, the Fund incurred brokerage fees of $2,238 and $14,774, respectively. Brokerage fees incurred during the Nine Months Ended September 30, 2013 and 2012 by the Fund were $34,841 and $43,615, respectively. As of September 30, 2013 and December 31, 2012, brokerage fees payable were $879 and $160, respectively.
	The Administrator, Custodian and Transfer Agent
	The Bank of New York Mellon (the “Administrator”) has been appointed by the Managing Owner as 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 September 30, 2013 and December 31, 2012, 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 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.
	Invesco PowerShares Capital Management LLC
	Under the License Agreement among Invesco PowerShares Capital Management LLC (the “Licensor”) and the Managing Owner in its own capacity and in its capacity as managing owner of the Fund (the Fund and the Managing Owner, collectively, the “Licensees”), the Licensor granted to each Licensee a non-exclusive license to use the “PowerShares®” trademark (the “Trademark”) anywhere in the world, solely in connection with the marketing and promotion of the Fund and to use or refer to the Trademark in connection with the issuance and trading of the Fund as necessary.
	Invesco Distributors, Inc.
	Through a marketing agreement between the Managing Owner and Invesco Distributors, Inc. (“Invesco Distributors”), an affiliate of Invesco PowerShares Capital Management LLC, the Managing Owner, on behalf of the Fund, has appointed Invesco Distributors as a marketing agent. Invesco Distributors assists the Managing Owner and the Administrator with certain functions and duties such as providing various educational and marketing activities regarding the Fund, primarily in the secondary trading market, which activities include, but are not limited to, communicating the Fund’s name, characteristics, uses, benefits, and risks, consistent with the prospectus. Invesco Distributors will not open or maintain customer accounts or handle orders for the Fund. Invesco Distributors engages in public seminars, road shows, conferences, media interviews, and distributes sales literature and other communications (including electronic media) regarding the Fund.

Summary_of_Significant_Account

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

'

Summary of Significant Accounting Policies

'

(4) 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.

The presentation of Shareholders’ Equity in prior years has been updated to conform to the September 30, 2013 presentation. Total Shareholders’ Equity was not affected by these changes.

(b) Use of Estimates

The preparation of the financial statements in conformity with U.S. generally accepted accounting principles 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 currency futures contracts are recorded in the statements of financial condition on trade date 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).

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 currency futures contracts, the Fund uses unadjusted quoted market prices in active markets. United States Treasury Obligations and currency 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 currency futures contracts.

Assets and Liabilities Measured at Fair Value were as follows:

September 30,

December 31,

2013

2012

United States Treasury Obligations (Level 1)

$

65,999,071

$

72,995,469

Currency Futures Contracts (Level 1)

$

1,070,832

$

(21,654

)

There were no Level 2 or Level 3 holdings as of September 30, 2013 and December 31, 2012.

(d) Deposits with Commodity Broker

The Fund deposits cash and United States Treasury Obligations with its Commodity Broker subject to Commodity Futures Trading Commission (the “CFTC”) regulations and various exchange and Commodity 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 Commodity 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 trade date. These holdings are marked to market based on quoted 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. Included in the United States Treasury Obligations as of September 30, 2013 and December 31, 2012 were holdings of $1,395,680 and $1,290,300, respectively, which were restricted and held as initial margin of the open futures contracts.

(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 September 30, 2013, the Fund had $2,900,378 of cash held with the Commodity Broker. As of December 31, 2012, the Fund had cash held by the Commodity Broker of $19,586,191, of which $21,654 was on deposit to satisfy the Fund’s negative variation margin on open futures contracts. There were no cash equivalents held by the Fund as of September 30, 2013 and December 31, 2012.

(g) 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.

The major tax jurisdiction for the Fund and the earliest tax year subject to examination: United States, 2009.

(h) Futures Contracts

All currency futures contracts are held and used for trading purposes. Currency futures are recorded on trade date 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 currency 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. Futures contracts held as of September 30, 2013 are indicative of the volume of derivative activity during the period.

The Fair Value of Derivative Instruments is as follows:

Derivatives not Accounted for as Hedging Instruments

Statements of Financial Condition Location

Net Unrealized

Net Unrealized

Appreciation /

Appreciation /

(Depreciation) at

(Depreciation) at

September 30, 2013

December 31, 2012

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

1,070,832

$

(21,654

)

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

For the Three Months Ended

For the Three Months Ended

September 30, 2013

September 30, 2012

Derivatives not Accounted for as Hedging

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Instruments

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(437,424

)

—

$

2,910,540

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

3,155,758

—

$

(1,186,586

)

For the Nine Months Ended

For the Nine Months Ended

September 30, 2013

September 30, 2012

Derivatives not Accounted for as Hedging

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Instruments

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(1,899,006

)

—

$

2,447,411

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

1,092,486

—

$

(1,347,609

)

(i) 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 $15.00 per round-turn trade for the Three Months Ended September 30, 2013 and 2012 and the Nine Months Ended September 30, 2013 and 2012.

(j) Routine Operational, Administrative and Other Ordinary Expenses

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. Accordingly, all such expenses are not reflected in the statement of income and expenses of the Fund.

(k) Organizational and Offering Costs

All organizational and offering expenses of the Fund are incurred and assumed by the Managing Owner. The Fund is not responsible to the Managing Owner for the reimbursement of organizational and offering costs. Expenses incurred in connection with the continuous offering of Shares are also paid by the Managing Owner.

(l) Non-Recurring and Unusual Fees and Expenses

The Fund pays all fees and expenses which are non-recurring and unusual in nature. Such expenses include legal claims and liabilities, litigation costs or indemnification or other unanticipated expenses. Such fees and expenses, by their nature, are unpredictable in terms of timing and amount. For the Three Months Ended September 30, 2013 and 2012 and the Nine Months Ended September 30, 2013 and 2012, the Fund did not incur such expenses.

Financial_Instrument_Risk

Financial Instrument Risk	9 Months Ended
	Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]	'
Financial Instrument Risk	'
	(5) 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 exchange-listed currency 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 currency prices. In entering into these futures contracts, there exists a market risk that such futures contracts may be significantly influenced by 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	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Share Purchases and Redemptions	'
	(6) Share Purchases and Redemptions
	(a) Purchases
	Shares may be purchased directly from the Fund only by Authorized Participants in one or more blocks of 200,000 Shares, called a Basket. Upon submission of a creation order, the Authorized Participant may request that the Managing Owner agree to a creation order settlement date of up to 3 business days after the creation order date. Accordingly, the Fund issues Shares in Baskets to Authorized Participants within 3 business days immediately following the date on which a valid order to create a Basket is accepted by the Fund, at the net asset value of 200,000 Shares, which is determined as promptly as practicable following the publication of the Fund’s net asset value on the date that a valid order to create a Basket is accepted by the Fund.
	(b) Redemptions
	The redemption procedures allow only Authorized Participants to redeem Baskets. On any business day, an Authorized Participant may place an order with the Managing Owner to redeem one or more Baskets. Redemption orders must be placed by 1:00 p.m., Eastern Time. The day on which the Managing Owner receives a valid redemption order is the redemption order date. Redemption orders are irrevocable.
	Redemption 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, 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 and such fee is not borne by the Fund.
	The redemption proceeds from the Fund consist of the cash redemption amount. 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. 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 on the redemption order date (the “Settlement Time”). As agreed to between the Authorized Participant and the Managing Owner, the Fund will distribute the cash redemption amount within 3 business days immediately following the redemption order date. The redemption proceeds from the Fund will be credited to the Authorized Participant at the Settlement Time through the CNS system, assuming timely delivery of redemption Baskets and the transaction fee through the CNS system in accordance with the terms, conditions and guarantees as set forth in the CNS agreements to which the Custodian and the Authorized Participant have entered into. Through the DTC process, the redemption proceeds from the Fund will be delivered through the DTC to the account of the Authorized Participant as recorded on the book entry system of the DTC at the Settlement Time. If the Fund’s account has not been credited with all of the Baskets to be redeemed by such time, the redemption proceeds are delivered to the extent of whole Baskets received and any outstanding amount of the redemption order will be canceled.
	(c) Share Transactions
	Summary of Share Transactions for the Three Months Ended September 30, 2013 and 2012
	and the Nine Months Ended September 30, 2013 and 2012 (unaudited)
		Shares						Shareholders’ Equity						Shares						Shareholders’ Equity
		Three Months Ended						Three Months Ended						Nine Months Ended						Nine Months Ended
		September 30,			September 30,			September 30,			September 30,			September 30,			September 30,			September 30,			September 30,
		2013			2012			2013			2012			2013			2012			2013			2012
	Shares Sold		—			600,000		$	—		$	16,287,382			200,000			1,600,000		$	5,457,806		$	43,057,692
	Shares Redeemed		(200,000	)		(200,000	)		(5,324,778	)		(5,465,565	)		(1,200,000	)		(2,200,000	)		(31,782,128	)		(58,878,451	)
	Net Increase (Decrease)		(200,000	)		400,000		$	(5,324,778	)	$	10,821,817			(1,000,000	)		(600,000	)	$	(26,324,322	)	$	(15,820,759	)

Profit_and_Loss_Allocations_an

Profit and Loss Allocations and Distributions	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Profit and Loss Allocations and Distributions	'
	(7) 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 Nine Months Ended September 30, 2013 or 2012.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	(8) 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 September 30, 2013, no claims had been received by the Fund and it was therefore not possible to estimate the Fund’s potential future exposure under such indemnification provisions.

Net_Asset_Value_and_Financial_

Net Asset Value and Financial Highlights	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Net Asset Value and Financial Highlights	'
	(9) 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 Three Months Ended September 30, 2013 and 2012 and for the Nine Months Ended September 30, 2013 and 2012. The net investment income and total expense ratios are calculated using average net asset value during the respective period. The net asset value presentation is calculated using daily Shares outstanding. The net investment income and total expense ratios have been annualized. 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.
			Three Months Ended						Nine Months Ended
			September 30,			September 30,			September 30,			September 30,
			2013			2012			2013			2012
	Net Asset Value
	Net asset value per Share, beginning of period		$	26.02		$	26.62		$	27.2		$	26.88
	Net realized and change in unrealized gain (loss) on United States Treasury Obligations and Futures			1.08			0.6			0			0.44
	Net investment income (loss)			(0.05	)		(0.05	)		(0.15	)		(0.15	)
	Net income (loss)			1.03			0.55			(0.15	)		0.29
	Net asset value per Share, end of period		$	27.05		$	27.17		$	27.05		$	27.17
	Market value per Share, beginning of period		$	26.01		$	26.59		$	27.21		$	26.85
	Market value per Share, end of period		$	27.07		$	27.17		$	27.07		$	27.17
	Ratio to average Net Assets*
	Net investment income (loss)			(0.72	)%		(0.75	)%		(0.76	)%		(0.77	)%
	Total expenses			0.76	%		0.83	%		0.81	%		0.82	%
	Total Return, at net asset value **			3.96	%		2.07	%		(0.55	)%		1.08	%
	Total Return, at market value **			4.08	%		2.18	%		(0.51	)%		1.19	%
	*	Percentages are annualized.
	**	Percentages are not annualized.

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	(10) Subsequent Events
	The Fund evaluated the need for disclosures and/or adjustments resulting from subsequent events through the date the financial statements were issued. This evaluation did not result in any subsequent events that necessitated disclosures and/or adjustments.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2013

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.

The presentation of Shareholders’ Equity in prior years has been updated to conform to the September 30, 2013 presentation. Total Shareholders’ Equity was not affected by these changes.

Use of Estimates

'

(b) Use of Estimates

The preparation of the financial statements in conformity with U.S. generally accepted accounting principles 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 currency futures contracts are recorded in the statements of financial condition on trade date 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).

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 currency futures contracts, the Fund uses unadjusted quoted market prices in active markets. United States Treasury Obligations and currency 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 currency futures contracts.

Assets and Liabilities Measured at Fair Value were as follows:

September 30,

December 31,

2013

2012

United States Treasury Obligations (Level 1)

$

65,999,071

$

72,995,469

Currency Futures Contracts (Level 1)

$

1,070,832

$

(21,654

)

There were no Level 2 or Level 3 holdings as of September 30, 2013 and December 31, 2012.

Deposits with Commodity Broker

'

(d) Deposits with Commodity Broker

The Fund deposits cash and United States Treasury Obligations with its Commodity Broker subject to Commodity Futures Trading Commission (the “CFTC”) regulations and various exchange and Commodity 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 Commodity 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 trade date. These holdings are marked to market based on quoted 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. Included in the United States Treasury Obligations as of September 30, 2013 and December 31, 2012 were holdings of $1,395,680 and $1,290,300, respectively, which were restricted and held as initial margin of the open futures contracts.

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 September 30, 2013, the Fund had $2,900,378 of cash held with the Commodity Broker. As of December 31, 2012, the Fund had cash held by the Commodity Broker of $19,586,191, of which $21,654 was on deposit to satisfy the Fund’s negative variation margin on open futures contracts. There were no cash equivalents held by the Fund as of September 30, 2013 and December 31, 2012.

Income Taxes

'

(g) 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.

The major tax jurisdiction for the Fund and the earliest tax year subject to examination: United States, 2009.

Futures Contracts

'

(h) Futures Contracts

All currency futures contracts are held and used for trading purposes. Currency futures are recorded on trade date 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 currency 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. Futures contracts held as of September 30, 2013 are indicative of the volume of derivative activity during the period.

The Fair Value of Derivative Instruments is as follows:

Derivatives not Accounted for as Hedging Instruments

Statements of Financial Condition Location

Net Unrealized

Net Unrealized

Appreciation /

Appreciation /

(Depreciation) at

(Depreciation) at

September 30, 2013

December 31, 2012

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

1,070,832

$

(21,654

)

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

For the Three Months Ended

For the Three Months Ended

September 30, 2013

September 30, 2012

Derivatives not Accounted for as Hedging

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Instruments

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(437,424

)

—

$

2,910,540

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

3,155,758

—

$

(1,186,586

)

For the Nine Months Ended

For the Nine Months Ended

September 30, 2013

September 30, 2012

Derivatives not Accounted for as Hedging

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Instruments

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(1,899,006

)

—

$

2,447,411

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

1,092,486

—

$

(1,347,609

)

Brokerage Commissions and Fees

'

(i) 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 $15.00 per round-turn trade for the Three Months Ended September 30, 2013 and 2012 and the Nine Months Ended September 30, 2013 and 2012.

Routine Operational, Administrative and Other Ordinary Expenses

'

(j) Routine Operational, Administrative and Other Ordinary Expenses

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. Accordingly, all such expenses are not reflected in the statement of income and expenses of the Fund.

Organizational and Offering Costs

'

(k) Organizational and Offering Costs

All organizational and offering expenses of the Fund are incurred and assumed by the Managing Owner. The Fund is not responsible to the Managing Owner for the reimbursement of organizational and offering costs. Expenses incurred in connection with the continuous offering of Shares are also paid by the Managing Owner.

Non-Recurring and Unusual Fees and Expenses

'

(l) Non-Recurring and Unusual Fees and Expenses

The Fund pays all fees and expenses which are non-recurring and unusual in nature. Such expenses include legal claims and liabilities, litigation costs or indemnification or other unanticipated expenses. Such fees and expenses, by their nature, are unpredictable in terms of timing and amount. For the Three Months Ended September 30, 2013 and 2012 and the Nine Months Ended September 30, 2013 and 2012, the Fund did not incur such expenses.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

'

Assets and Liabilities Measured at Fair Value

'

Assets and Liabilities Measured at Fair Value were as follows:

September 30,

December 31,

2013

2012

United States Treasury Obligations (Level 1)

$

65,999,071

$

72,995,469

Currency Futures Contracts (Level 1)

$

1,070,832

$

(21,654

)

Fair Value of Derivative Instruments and Effect of Derivative Instruments on Statements of Income and Expenses

'

The Fair Value of Derivative Instruments is as follows:

Derivatives not Accounted for as Hedging Instruments

Statements of Financial Condition Location

Net Unrealized

Net Unrealized

Appreciation /

Appreciation /

(Depreciation) at

(Depreciation) at

September 30, 2013

December 31, 2012

Commodity Futures Contracts

Net Unrealized Appreciation (Depreciation) on Futures Contracts

$

1,070,832

$

(21,654

)

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

For the Three Months Ended

For the Three Months Ended

September 30, 2013

September 30, 2012

Derivatives not Accounted for as Hedging

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Instruments

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(437,424

)

—

$

2,910,540

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

3,155,758

—

$

(1,186,586

)

For the Nine Months Ended

For the Nine Months Ended

September 30, 2013

September 30, 2012

Derivatives not Accounted for as Hedging

Location of Gain or (Loss) on

Realized Gain

Change in

Realized Gain

Change in

Instruments

Derivatives Recognized in Income

or (Loss) on

Unrealized Gain

or (Loss) on

Unrealized Gain

Derivatives

or (Loss) on

Derivatives

or (Loss) on

Recognized in

Derivatives

Recognized in

Derivatives

Income

Recognized in

Income

Recognized in

Income

Income

Commodity Futures Contracts

Net Realized Gain (Loss) on Futures

$

(1,899,006

)

—

$

2,447,411

—

Net Change in Unrealized Gain (Loss) on Futures

—

$

1,092,486

—

$

(1,347,609

)

Share_Purchases_and_Redemption1

Share Purchases and Redemptions (Tables)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Summary of Share Transactions	'
	Summary of Share Transactions for the Three Months Ended September 30, 2013 and 2012
	and the Nine Months Ended September 30, 2013 and 2012 (unaudited)
		Shares						Shareholders’ Equity						Shares						Shareholders’ Equity
		Three Months Ended						Three Months Ended						Nine Months Ended						Nine Months Ended
		September 30,			September 30,			September 30,			September 30,			September 30,			September 30,			September 30,			September 30,
		2013			2012			2013			2012			2013			2012			2013			2012
	Shares Sold		—			600,000		$	—		$	16,287,382			200,000			1,600,000		$	5,457,806		$	43,057,692
	Shares Redeemed		(200,000	)		(200,000	)		(5,324,778	)		(5,465,565	)		(1,200,000	)		(2,200,000	)		(31,782,128	)		(58,878,451	)
	Net Increase (Decrease)		(200,000	)		400,000		$	(5,324,778	)	$	10,821,817			(1,000,000	)		(600,000	)	$	(26,324,322	)	$	(15,820,759	)

Net_Asset_Value_and_Financial_1

Net Asset Value and Financial Highlights (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Schedule of Net Asset Value Per Share	'
	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.
			Three Months Ended						Nine Months Ended
			September 30,			September 30,			September 30,			September 30,
			2013			2012			2013			2012
	Net Asset Value
	Net asset value per Share, beginning of period		$	26.02		$	26.62		$	27.2		$	26.88
	Net realized and change in unrealized gain (loss) on United States Treasury Obligations and Futures			1.08			0.6			0			0.44
	Net investment income (loss)			(0.05	)		(0.05	)		(0.15	)		(0.15	)
	Net income (loss)			1.03			0.55			(0.15	)		0.29
	Net asset value per Share, end of period		$	27.05		$	27.17		$	27.05		$	27.17
	Market value per Share, beginning of period		$	26.01		$	26.59		$	27.21		$	26.85
	Market value per Share, end of period		$	27.07		$	27.17		$	27.07		$	27.17
	Ratio to average Net Assets*
	Net investment income (loss)			(0.72	)%		(0.75	)%		(0.76	)%		(0.77	)%
	Total expenses			0.76	%		0.83	%		0.81	%		0.82	%
	Total Return, at net asset value **			3.96	%		2.07	%		(0.55	)%		1.08	%
	Total Return, at market value **			4.08	%		2.18	%		(0.51	)%		1.19	%
	*	Percentages are annualized.
	**	Percentages are not annualized.

Organization_Additional_Inform

Organization - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Aug. 03, 2006
			Power Shares DB US Dollar Index Bearish Fund [Member]
Partnership Organization And Basis Of Presentation [Line Items]	'	'	'
Number of series of trusts	'	'	2
Partners' capital contribution	'	$1,000	'
General shares, shares issued	'	40	'
Fund offered common units to authorized participants in number of basket	1	'	'
Number of shares issued per basket	200,000	'	'

Fund_Investment_Overview_Addit

Fund Investment Overview - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Fund Investment Overview [Abstract]	'	'
Deposits With Broker	$69,970,281	$92,560,006
Percentage of holdings of cash with Commodity Broker	100.00%	100.00%
Cash and United States Treasury Obligations deposited as margin in support of the Fund's long futures positions	$1,395,680	$1,290,300
Percentage of cash and United States Treasury Obligations deposited as margin in support of the Fund's long futures positions	1.99%	1.39%

Service_Providers_and_Related_1

Service Providers and Related Party Agreements - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Related Party Transactions [Abstract]	'	'	'	'	'
Management fee percentage per annum of daily net asset	0.75%	'	'	'	'
Management Fees	$123,574	$143,617	$432,621	$486,229	'
Management Fees payable	40,056	'	40,056	'	61,918
Brokerage fees	2,238	14,774	34,841	43,615	'
Brokerage fees payable	879	'	879	'	160
Fund assets held by administrator	$0	'	$0	'	$0

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Assets and Liabilities Measured at Fair Value (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Net unrealized appreciation (depreciation) on futures contracts	$1,070,832	($21,654)
United States Treasury Obligations [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Net unrealized appreciation (depreciation) on futures contracts	65,999,071	72,995,469
Currency Futures Contracts [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Net unrealized appreciation (depreciation) on futures contracts	$1,070,832	($21,654)

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	9 Months Ended						3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
			Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 3 [Member]	Fair Value, Inputs, Level 3 [Member]	Maximum [Member]	Maximum [Member]	Maximum [Member]	Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'	'	'	'	'	'	'
Asset and liabilities measured at fair value	'	'	$0	$0	$0	$0	'	'	'	'
Restricted investments	1,395,680	1,290,300	'	'	'	'	'	'	'	'
Cash held with the Commodity Broker	2,900,378	19,586,191	'	'	'	'	'	'	'	'
Cash and cash equivalents, original maturities, maximum number of months	'3 months	'	'	'	'	'	'	'	'	'
Deposits related to broker	'	21,654	'	'	'	'	'	'	'	'
Cash equivalents held	0	0	'	'	'	'	'	'	'	'
Average charges paid to broker per round-turn trade, maximum	'	'	'	'	'	'	$15	$15	$15	$15

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 $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivative Instruments Not Designated As Hedging Instruments [Abstract]	'	'	'	'	'
Net unrealized appreciation (depreciation) on futures contracts	$1,070,832	'	$1,070,832	'	($21,654)
Commodity Futures Contracts Net Realized Gain (Loss) on Futures	-437,424	2,910,540	-1,899,006	2,447,411	'
Net Change in Unrealized Gain (Loss) on Futures	$3,155,758	($1,186,586)	$1,092,486	($1,347,609)	'

Share_Purchases_and_Redemption2

Share Purchases and Redemptions - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Shares Repurchase [Abstract]	'
Minimum number of Baskets that can be purchased	1
Number of shares issued per basket	200,000

Share_Purchases_and_Redemption3

Share Purchases and Redemptions - Summary of Share Transactions (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Shares Repurchase [Abstract]	'	'	'	'
Shares Sold, Shares	'	600,000	200,000	1,600,000
Shares Redeemed, Shares	-200,000	-200,000	-1,200,000	-2,200,000
Net Increase (Decrease), Shares	-200,000	400,000	-1,000,000	-600,000
Shares Sold, Shareholders' Equity	'	$16,287,382	$5,457,806	$43,057,692
Shares Redeemed, Shareholders' Equity	-5,324,778	-5,465,565	-31,782,128	-58,878,451
Net Increase (Decrease), Shareholders' Equity	($5,324,778)	$10,821,817	($26,324,322)	($15,820,759)

Profit_and_Loss_Allocation_and

Profit and Loss Allocation and Distributions - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'
Distributed Earnings	$0	$0

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	Claim
Commitments And Contingencies [Abstract]	'
Claims received by fund	0

Net_Asset_Value_and_Financial_2

Net Asset Value and Financial Highlights - Schedule of Net Asset Value Per Share (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earning Per Share [Abstract]	'	'	'	'
Net asset value per Share, beginning of period	$26.02	$26.62	$27.20	$26.88
Net realized and change in unrealized gain (loss) on United States Treasury Obligations and Futures	$1.08	$0.60	$0	$0.44
Net investment income (loss)	($0.05)	($0.05)	($0.15)	($0.15)
Net income (loss)	$1.03	$0.55	($0.15)	$0.29
Net asset value per Share, end of period	$27.05	$27.17	$27.05	$27.17
Market value per Share, beginning of period	$26.01	$26.59	$27.21	$26.85
Market value per Share, end of period	$27.07	$27.17	$27.07	$27.17
Net investment income (loss)	-0.72%	-0.75%	-0.76%	-0.77%
Total expenses	0.76%	0.83%	0.81%	0.82%
Total Return, at net asset value **	3.96%	2.07%	-0.55%	1.08%
Total Return, at market value **	4.08%	2.18%	-0.51%	1.19%