Statements of Changes in Shareholders' Equity - USD ($)	Total		ProShares VIX Short-Term Futures ETF [Member]	ProShares VIX Mid-Term Futures ETF [Member]	ProShares Short VIX Short-Term Futures ETF [Member]	ProShares Ultra VIX Short-Term Futures ETF [Member]	ProShares UltraShort Bloomberg Crude Oil [Member]	ProShares UltraShort Bloomberg Natural Gas [Member]	ProShares UltraShort Gold [Member]	ProShares UltraShort Silver [Member]	ProShares Short Euro [Member]	ProShares UltraShort Australian Dollar [Member]	ProShares UltraShort Euro [Member]	ProShares UltraShort Yen [Member]	ProShares Ultra Bloomberg Crude Oil [Member]	ProShares Ultra Bloomberg Natural Gas [Member]	ProShares Ultra Gold [Member]	ProShares Ultra Silver [Member]	ProShares Ultra Euro [Member]	ProShares Ultra Yen [Member]
Shareholders' equity, beginning of period at Dec. 31, 2013	$ 3,082,207,084		$ 270,398,554	$ 51,134,323	$ 141,751,202	$ 226,233,584	$ 256,060,149	$ 22,734,767	$ 139,436,456	$ 112,989,686	$ 8,896,842	$ 27,983,279	$ 418,001,115	$ 588,121,516	$ 142,773,429	$ 62,915,779	$ 132,017,405	$ 465,479,519	$ 2,603,827	$ 2,795,026
Addition of shares	5,351,585,350		228,373,046	41,886,902	1,056,547,830	1,646,851,705	474,919,955	119,491,987	51,784,693	72,497,634	8,924,282		84,751,333	216,403,570	1,007,757,253	171,856,215	13,559,078	144,929,400	1,024,904	716,043
Redemption of shares	(4,863,993,237)		(408,422,699)	(61,955,645)	(739,931,932)	(1,440,123,709)	(705,083,600)	(138,773,402)	(95,254,958)	(149,820,485)	(5,692,613)	(6,770,427)	(95,749,761)	(366,185,318)	(329,639,408)	(126,116,197)	(41,631,461)	(149,826,411)		(975,650)
Net addition (redemption) of shares	487,592,113		(180,049,653)	(20,068,743)	316,615,898	206,727,996	(230,163,645)	(19,281,415)	(43,470,265)	(77,322,851)	3,231,669	(6,770,427)	(10,998,428)	(149,781,748)	678,117,845	45,740,018	(28,072,383)	(4,897,011)	1,024,904	(259,607)
Net investment income (loss)	(31,105,278)		(1,118,548)	(386,478)	(4,285,469)	(5,359,486)	(2,415,841)	(460,907)	(857,817)	(585,841)	(118,247)	(213,183)	(3,994,145)	(3,741,601)	(1,766,364)	(528,581)	(1,157,348)	(3,968,608)	(22,247)	(20,862)
Net realized gain (loss)	(160,550,428)		(682,105)	(14,377,068)	76,945,361	(139,402,604)	99,347,798	8,796,882	(5,312,609)	15,119,117	1,593,450	2,296,708	83,683,592	127,860,058	(243,314,151)	(6,459,728)	(9,672,972)	(155,543,194)	(420,528)	(540,304)
Change in net unrealized appreciation/depreciation	(46,083,005)		22,911,077	5,157,541	(24,470,868)	63,590,463	46,381,649	2,899,237	(7,934,003)	2,807,756	418,090	(175,587)	30,499,215	(30,986,352)	(125,247,771)	(31,234,281)	8,888,643	(9,900,963)	(204,515)	143,775
Net income (loss)	(237,738,711)		21,110,424	(9,606,005)	48,189,024	(81,171,627)	143,313,606	11,235,212	(14,104,429)	17,341,032	1,893,293	1,907,938	110,188,662	93,132,105	(370,328,286)	(38,222,590)	(1,941,677)	(169,412,765)	(647,290)	(417,391)
Shareholders' equity, end of period at Dec. 31, 2014	3,332,060,486	[1]	111,459,325	21,459,575	506,556,124	351,789,953	169,210,110	14,688,564	81,861,762	53,007,867	14,021,804	23,120,790	517,191,349	531,471,873	450,562,988	70,433,207	102,003,345	291,169,743	2,981,441	2,118,028
Addition of shares	8,943,932,891	[1]	187,659,682	19,318,111	1,403,231,166	3,192,766,319	796,070,368	37,204,187	13,383,255	84,272,164	23,563,492	2,764,167	328,253,174	124,524,909	2,505,616,928	83,526,876	5,401,300	96,078,803	15,916,613	4,285,016
Redemption of shares	(7,525,116,193)	[1]	(165,941,648)	(8,946,515)	(1,358,113,886)	(2,569,549,298)	(924,949,248)	(50,053,143)	(36,377,117)	(95,719,329)	(21,313,217)	(8,380,675)	(404,314,387)	(411,459,070)	(1,300,173,042)	(54,776,954)	(13,827,755)	(79,831,719)	(6,661,858)	(688,682)
Net addition (redemption) of shares	1,418,816,698	[1]	21,718,034	10,371,596	45,117,280	623,217,021	(128,878,880)	(12,848,956)	(22,993,862)	(11,447,165)	2,250,275	(5,616,508)	(76,061,213)	(286,934,161)	1,205,443,886	28,749,922	(8,426,455)	16,247,084	9,254,755	3,596,334
Net investment income (loss)	(40,036,826)	[1]	(1,150,794)	(240,600)	(5,798,200)	(7,410,148)	(2,166,211)	(177,124)	(703,582)	(516,464)	(178,761)	(209,987)	(5,000,587)	(3,623,678)	(8,473,155)	(761,335)	(796,424)	(2,507,859)	(104,071)	(44,423)
Net realized gain (loss)	(1,164,531,561)	[1]	(19,406,840)	(3,334,581)	69,828,657	(392,223,946)	91,684,782	15,212,833	12,708,936	10,756,758	1,559,643	4,330,688	131,674,081	8,806,429	(896,154,368)	(100,772,476)	(18,606,208)	(78,309,750)	(1,982,317)	(472,907)
Change in net unrealized appreciation/depreciation	(39,700,049)	[1]	(7,346,902)	(605,352)	27,107,500	(27,664,140)	(33,951,907)	(6,412,461)	4,098,510	4,186,942	(142,063)	(1,164,304)	(45,497,112)	(12,347,563)	32,543,124	41,201,866	(4,309,443)	(10,182,576)	707,922	276,816
Net income (loss)	(1,244,268,436)	[1]	(27,904,536)	(4,180,533)	91,137,957	(427,298,234)	55,566,664	8,623,248	16,103,864	14,427,236	1,238,819	2,956,397	81,176,382	(7,164,812)	(872,084,399)	(60,331,945)	(23,712,075)	(91,000,185)	(1,378,466)	(240,514)
Shareholders' equity, end of period at Dec. 31, 2015	3,506,608,748	[1],[2]	105,272,823	27,650,638	642,811,361	547,708,740	95,897,894	10,462,856	74,971,764	55,987,938	17,510,898	20,460,679	522,306,518	237,372,900	783,922,475	38,851,184	69,864,815	216,416,642	10,857,730	5,473,848
Addition of shares	10,633,008,985	[2]	515,131,303	55,230,587	2,867,628,691	4,540,375,465	1,002,034,810	40,020,426	83,353,994	69,113,968	2,109,382		15,418,329	150,763,218	1,094,604,444	40,783,818	41,599,776	104,165,405	4,628,749
Redemption of shares	(9,667,529,469)	[2]	(249,951,175)	(24,737,849)	(3,696,284,684)	(2,976,168,388)	(805,300,056)	(48,901,060)	(83,209,971)	(80,899,441)	(4,280,745)	(2,517,734)	(204,742,206)	(118,175,844)	(1,163,214,447)	(49,841,263)	(22,303,538)	(106,536,792)	(2,458,060)	(199)
Net addition (redemption) of shares	965,479,516	[2]	265,180,128	30,492,738	(828,655,993)	1,564,207,077	196,734,754	(8,880,634)	144,023	(11,785,473)	(2,171,363)	(2,517,734)	(189,323,877)	32,587,374	(68,610,003)	(9,057,445)	19,296,238	(2,371,387)	2,170,689	(199)
Net investment income (loss)	(33,017,182)	[2]	(1,436,647)	(294,491)	(5,396,850)	(8,936,777)	(1,408,964)	(122,172)	(461,423)	(255,853)	(122,728)	(145,652)	(2,764,657)	(1,609,562)	(6,631,380)	(384,486)	(650,951)	(2,179,392)	(74,522)	(45,847)
Net realized gain (loss)	(1,320,602,359)	[2]	(195,469,141)	(11,085,007)	440,379,719	(1,567,324,739)	(67,756,228)	589,999	(12,241,129)	(17,556,630)	663,807	(2,786,709)	(25,711,276)	(22,226,181)	74,043,666	17,571,111	5,815,759	62,342,586	139,113	717,052
Change in net unrealized appreciation/depreciation	157,868,764	[2]	612,983	(944,964)	(21,062,850)	(19,895,547)	(22,509,153)	1,988,745	1,240,412	(3,372,326)	(110,526)	1,602,889	44,885,942	30,657,216	151,007,102	(3,776,978)	(2,198,661)	1,571,491	(1,178,425)	(603,897)
Net income (loss)	(1,195,750,777)	[2]	(196,292,805)	(12,324,462)	413,920,019	(1,596,157,063)	(91,674,345)	2,456,572	(11,462,140)	(21,184,809)	430,553	(1,329,472)	16,410,009	6,821,473	218,419,388	13,409,647	2,966,147	61,734,685	(1,113,834)	67,308
Shareholders' equity, end of period at Dec. 31, 2016	$ 3,276,337,487	[2]	$ 174,160,146	$ 45,818,914	$ 228,075,387	$ 515,758,754	$ 200,958,303	$ 4,038,794	$ 63,653,647	$ 23,017,656	$ 15,770,088	$ 16,613,473	$ 349,392,650	$ 276,781,747	$ 933,731,860	$ 43,203,386	$ 92,127,200	$ 275,779,940	$ 11,914,585	$ 5,540,957

[1] The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.

[2] The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.