Statements Of Income And Expenses (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income
Interest Income	$ 220,799	$ 263,059	$ 305,585
Expenses
Management Fee	2,838,239	3,745,943	2,194,672
Brokerage Commissions and Fees	54,290	89,069	90,048
Total Expenses	2,892,529	3,835,012	2,284,720
Net investment income (loss)	(2,671,730)	(3,571,953)	(1,979,135)
Net Realized Gain (Loss) on
United States Treasury Obligations	2,188	14,513	(875)
Futures	(17,361,625)	68,019,605	90,057,380
Net realized gain (loss)	(17,359,437)	68,034,118	90,056,505
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations	15,041	(14,929)	11,903
Futures	39,733,080	(72,604,100)	8,421,445
Net change in unrealized gain (loss)	39,748,121	(72,619,029)	8,433,348
Net realized and net change in unrealized gain (loss) on United States Treasury Obligations and Futures	22,388,684	(4,584,911)	98,489,853
Net Income (Loss)	19,716,954	(8,156,864)	96,510,718
Less: net income attributed to the non-controlling interest in subsidiary-related party			(568)
Net Income (Loss) Attributable to PowerShares DB Precious Metals Fund	$ 19,716,954	$ (8,156,864)	$ 96,510,150