Statements of Financial Condition - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Assets
Cash		$ 39,482,473	$ 48,049,225
Segregated cash balances with brokers for futures contracts		180,212,984	261,083,712
Short-term U.S. government and agency obligations		3,038,848,441	3,313,591,600
Unrealized appreciation on swap agreements		55,358,571	6,669,519
Unrealized appreciation on forward agreements		4,417,812	6,587,221
Unrealized appreciation on foreign currency forward contracts		33,392,354	1,805,661
Receivable from capital shares sold			48,046,138
Receivable on open futures contracts		41,862,862	27,655,327
Total assets		3,393,575,497	3,713,488,403
Liabilities
Payable for capital shares redeemed		71,525,035	60,119,975
Payable on open futures contracts		3,972,621	3,078,269
Brokerage commissions and fees payable		2,909	39,148
Payable to Sponsor		2,722,696	2,839,305
Unrealized depreciation on swap agreements		12,206,881	72,446,044
Unrealized depreciation on forward agreements		25,407,296	24,811,696
Unrealized depreciation on foreign currency forward contracts		1,400,572	43,545,218
Total liabilities		117,238,010	206,879,655
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	[1]	3,276,337,487	3,506,608,748	[2]
Total liabilities and shareholders' equity		$ 3,393,575,497	$ 3,713,488,403
Shares outstanding		102,788,942	87,793,127
ProShares VIX Short-Term Futures ETF [Member]
Assets
Cash		$ 4,536,425	$ 2,124,103
Segregated cash balances with brokers for futures contracts		17,235,855	5,888,545
Short-term U.S. government and agency obligations		147,991,233	96,073,659
Receivable on open futures contracts		4,484,270	1,263,933
Total assets		174,247,783	105,350,240
Liabilities
Payable to Sponsor		87,637	77,417
Total liabilities		87,637	77,417
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		174,160,146	105,272,823
Total liabilities and shareholders' equity		$ 174,247,783	$ 105,350,240
Shares outstanding		8,209,451	1,589,962
Net asset value per share		$ 21.21	$ 66.21
Market value per share		$ 21.26	$ 66.65
ProShares VIX Mid-Term Futures ETF [Member]
Assets
Cash		$ 1,155,115	$ 671,791
Segregated cash balances with brokers for futures contracts		1,052,615	980,750
Short-term U.S. government and agency obligations		45,486,235	25,976,287
Receivable on open futures contracts		242,541	42,188
Total assets		47,936,506	27,671,016
Liabilities
Payable for capital shares redeemed		2,085,020
Payable to Sponsor		32,572	20,378
Total liabilities		2,117,592	20,378
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		45,818,914	27,650,638
Total liabilities and shareholders' equity		$ 47,936,506	$ 27,671,016
Shares outstanding		1,087,403	512,404
Net asset value per share		$ 42.14	$ 53.96
Market value per share		$ 42.34	$ 53.99
ProShares Short VIX Short-Term Futures ETF [Member]
Assets
Cash		$ 1,850,760	$ 5,150,976
Segregated cash balances with brokers for futures contracts		55,323,984	123,528,405
Short-term U.S. government and agency obligations		170,396,436	535,392,718
Receivable from capital shares sold			10,164,157
Receivable on open futures contracts		1,059,418
Total assets		228,630,598	674,236,256
Liabilities
Payable for capital shares redeemed			29,497,107
Payable on open futures contracts		325,000	1,420,271
Payable to Sponsor		230,211	507,517
Total liabilities		555,211	31,424,895
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		228,075,387	642,811,361
Total liabilities and shareholders' equity		$ 228,630,598	$ 674,236,256
Shares outstanding		2,500,000	12,650,040
Net asset value per share		$ 91.23	$ 50.81
Market value per share		$ 90.98	$ 50.45
ProShares Ultra VIX Short-Term Futures ETF [Member]
Assets
Cash		$ 10,969,955	$ 9,081,964
Segregated cash balances with brokers for futures contracts		71,363,625	62,348,600
Short-term U.S. government and agency obligations		434,671,795	438,357,849
Receivable from capital shares sold			32,987,472
Receivable on open futures contracts		35,967,191	17,995,478
Total assets		552,972,566	560,771,363
Liabilities
Payable for capital shares redeemed		36,789,539	12,635,235
Payable to Sponsor		424,273	427,388
Total liabilities		37,213,812	13,062,623
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		515,758,754	547,708,740
Total liabilities and shareholders' equity		$ 552,972,566	$ 560,771,363
Shares outstanding		11,861,530	780,098
Net asset value per share		$ 43.48	$ 702.10
Market value per share		$ 43.75	$ 708.75
ProShares UltraShort Bloomberg Crude Oil [Member]
Assets
Cash		$ 2,715,772	$ 598,645
Segregated cash balances with brokers for futures contracts		4,931,520	10,154,430
Short-term U.S. government and agency obligations		205,694,385	79,692,642
Unrealized appreciation on swap agreements			6,412,656
Total assets		213,341,677	96,858,373
Liabilities
Payable on open futures contracts		13,602	850,883
Brokerage commissions and fees payable			8,453
Payable to Sponsor		162,891	101,143
Unrealized depreciation on swap agreements		12,206,881
Total liabilities		12,383,374	960,479
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		200,958,303	95,897,894
Total liabilities and shareholders' equity		$ 213,341,677	$ 96,858,373
Shares outstanding		6,339,884	1,439,888
Net asset value per share		$ 31.70	$ 66.60
Market value per share		$ 31.65	$ 66.82
ProShares UltraShort Bloomberg Natural Gas [Member]
Assets
Cash		$ 326,631	$ 1,099,140
Segregated cash balances with brokers for futures contracts		710,655	2,046,660
Short-term U.S. government and agency obligations		2,899,151	8,115,004
Receivable on open futures contracts		105,872
Total assets		4,042,309	11,260,804
Liabilities
Payable on open futures contracts			785,170
Brokerage commissions and fees payable		144	1,908
Payable to Sponsor		3,371	10,870
Total liabilities		3,515	797,948
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		4,038,794	10,462,856
Total liabilities and shareholders' equity		$ 4,042,309	$ 11,260,804
Shares outstanding		174,832	224,856
Net asset value per share		$ 23.10	$ 46.53
Market value per share		$ 23.05	$ 46.55
ProShares UltraShort Gold [Member]
Assets
Cash		$ 120,840	$ 151,638
Segregated cash balances with brokers for futures contracts		13,200	91,250
Short-term U.S. government and agency obligations		60,540,555	72,979,905
Unrealized appreciation on forward agreements		3,033,566	1,808,942
Receivable on open futures contracts		1,280
Total assets		63,709,441	75,031,735
Liabilities
Payable on open futures contracts			80
Payable to Sponsor		55,794	59,891
Total liabilities		55,794	59,971
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		63,653,647	74,971,764
Total liabilities and shareholders' equity		$ 63,709,441	$ 75,031,735
Shares outstanding		696,978	646,978
Net asset value per share		$ 91.33	$ 115.88
Market value per share		$ 90.54	$ 115.83
ProShares UltraShort Silver [Member]
Assets
Cash		$ 86,051	$ 514,784
Segregated cash balances with brokers for futures contracts		14,300	11,440
Short-term U.S. government and agency obligations		21,550,319	50,730,230
Unrealized appreciation on forward agreements		1,384,246	4,778,279
Receivable on open futures contracts		2,290	390
Total assets		23,037,206	56,035,123
Liabilities
Payable to Sponsor		19,550	47,185
Total liabilities		19,550	47,185
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		23,017,656	55,987,938
Total liabilities and shareholders' equity		$ 23,037,206	$ 56,035,123
Shares outstanding		616,976	866,978
Net asset value per share		$ 37.31	$ 64.58
Market value per share		$ 38.76	$ 64.55
ProShares Short Euro [Member]
Assets
Cash		$ 2,292,012	$ 1,783,802
Segregated cash balances with brokers for futures contracts		402,600	503,745
Short-term U.S. government and agency obligations		13,164,828	15,153,211
Receivable on open futures contracts			84,235
Total assets		15,859,440	17,524,993
Liabilities
Payable on open futures contracts		76,666
Payable to Sponsor		12,686	14,095
Total liabilities		89,352	14,095
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		15,770,088	17,510,898
Total liabilities and shareholders' equity		$ 15,859,440	$ 17,524,993
Shares outstanding		350,000	400,005
Net asset value per share		$ 45.06	$ 43.78
Market value per share		$ 45.12	$ 43.74
ProShares UltraShort Australian Dollar [Member]
Assets
Cash		$ 2,834,389	$ 1,958,996
Segregated cash balances with brokers for futures contracts		914,760	57,065
Short-term U.S. government and agency obligations		12,909,619	18,408,894
Receivable on open futures contracts			52,491
Total assets		16,658,768	20,477,446
Liabilities
Payable on open futures contracts		32,340
Payable to Sponsor		12,955	16,767
Total liabilities		45,295	16,767
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		16,613,473	20,460,679
Total liabilities and shareholders' equity		$ 16,658,768	$ 20,477,446
Shares outstanding		300,000	350,005
Net asset value per share		$ 55.38	$ 58.46
Market value per share		$ 55.24	$ 58.15
ProShares UltraShort Euro [Member]
Assets
Cash		$ 2,916,502	$ 10,372,583
Short-term U.S. government and agency obligations		337,375,787	546,166,776
Unrealized appreciation on foreign currency forward contracts		16,519,070
Total assets		356,811,359	556,539,359
Liabilities
Payable for capital shares redeemed		6,771,472	5,108,230
Payable to Sponsor		291,098	414,275
Unrealized depreciation on foreign currency forward contracts		356,139	28,710,336
Total liabilities		7,418,709	34,232,841
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		349,392,650	522,306,518
Total liabilities and shareholders' equity		$ 356,811,359	$ 556,539,359
Shares outstanding		12,900,000	20,450,014
Net asset value per share		$ 27.08	$ 25.54
Market value per share		$ 27.08	$ 25.53
ProShares UltraShort Yen [Member]
Assets
Cash		$ 3,166,988	$ 276,968
Short-term U.S. government and agency obligations		257,102,313	259,997,001
Unrealized appreciation on foreign currency forward contracts		16,870,357	933,727
Total assets		277,139,658	261,207,696
Liabilities
Payable for capital shares redeemed			8,794,729
Payable to Sponsor		232,491	210,888
Unrealized depreciation on foreign currency forward contracts		125,420	14,829,179
Total liabilities		357,911	23,834,796
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		276,781,747	237,372,900
Total liabilities and shareholders' equity		$ 277,139,658	$ 261,207,696
Shares outstanding		3,449,290	2,699,294
Net asset value per share		$ 80.24	$ 87.94
Market value per share		$ 80.25	$ 87.89
ProShares Ultra Bloomberg Crude Oil [Member]
Assets
Cash		$ 1,401,555	$ 4,008,379
Segregated cash balances with brokers for futures contracts		20,609,600	47,571,810
Short-term U.S. government and agency obligations		885,050,007	797,650,543
Unrealized appreciation on swap agreements		55,358,571
Receivable from capital shares sold			4,894,509
Receivable on open futures contracts			5,150,763
Total assets		962,419,733	859,276,004
Liabilities
Payable for capital shares redeemed		25,879,004	2,514,956
Payable on open futures contracts		1,993,438
Brokerage commissions and fees payable		2,332	25,000
Payable to Sponsor		813,099	636,984
Unrealized depreciation on swap agreements			72,176,589
Total liabilities		28,687,873	75,353,529
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		933,731,860	783,922,475
Total liabilities and shareholders' equity		$ 962,419,733	$ 859,276,004
Shares outstanding		40,013,933	31,163,934
Net asset value per share		$ 23.34	$ 25.15
Market value per share		$ 23.36	$ 25.08
ProShares Ultra Bloomberg Natural Gas [Member]
Assets
Cash		$ 971,442	$ 1,411,137
Segregated cash balances with brokers for futures contracts		7,612,770	7,595,280
Short-term U.S. government and agency obligations		36,183,648	26,807,731
Receivable on open futures contracts			3,065,769
Total assets		44,767,860	38,879,917
Liabilities
Payable on open futures contracts		1,528,005
Brokerage commissions and fees payable		433	3,623
Payable to Sponsor		36,036	25,110
Total liabilities		1,564,474	28,733
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		43,203,386	38,851,184
Total liabilities and shareholders' equity		$ 44,767,860	$ 38,879,917
Shares outstanding		2,292,169	2,092,170
Net asset value per share		$ 18.85	$ 18.57
Market value per share		$ 18.96	$ 18.48
ProShares Ultra Gold [Member]
Assets
Cash		$ 1,262,351	$ 251,524
Segregated cash balances with brokers for futures contracts		13,200	8,250
Short-term U.S. government and agency obligations		95,356,621	71,912,587
Receivable on open futures contracts			80
Total assets		96,632,172	72,172,441
Liabilities
Payable on open futures contracts		1,280
Payable to Sponsor		72,585	57,031
Unrealized depreciation on forward agreements		4,431,107	2,250,595
Total liabilities		4,504,972	2,307,626
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		92,127,200	69,864,815
Total liabilities and shareholders' equity		$ 96,632,172	$ 72,172,441
Shares outstanding		2,800,000	2,350,014
Net asset value per share		$ 32.90	$ 29.73
Market value per share		$ 33.20	$ 29.73
ProShares Ultra Silver [Member]
Assets
Cash		$ 1,664,601	$ 243,900
Segregated cash balances with brokers for futures contracts		14,300	17,160
Short-term U.S. government and agency obligations		295,300,799	238,899,626
Total assets		296,979,700	239,160,686
Liabilities
Payable on open futures contracts		2,290	1,875
Payable to Sponsor		221,281	181,068
Unrealized depreciation on forward agreements		20,976,189	22,561,101
Total liabilities		21,199,760	22,744,044
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		275,779,940	216,416,642
Total liabilities and shareholders' equity		$ 296,979,700	$ 239,160,686
Shares outstanding		8,246,526	7,996,533
Net asset value per share		$ 33.44	$ 27.06
Market value per share		$ 32.09	$ 27.08
ProShares Ultra Euro [Member]
Assets
Cash		$ 606,393	$ 227,310
Short-term U.S. government and agency obligations		11,891,831	11,605,262
Unrealized appreciation on foreign currency forward contracts		2,548	604,920
Total assets		12,500,772	12,437,492
Liabilities
Payable for capital shares redeemed			1,569,718
Payable to Sponsor		9,629	10,044
Unrealized depreciation on foreign currency forward contracts		576,558
Total liabilities		586,187	1,579,762
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		11,914,585	10,857,730
Total liabilities and shareholders' equity		$ 12,500,772	$ 12,437,492
Shares outstanding		850,000	700,014
Net asset value per share		$ 14.02	$ 15.51
Market value per share		$ 14.09	$ 15.51
ProShares Ultra Yen [Member]
Assets
Cash		$ 604,691	$ 147,371
Short-term U.S. government and agency obligations		5,282,879	5,069,491
Unrealized appreciation on foreign currency forward contracts		379	267,014
Total assets		5,887,949	5,483,876
Liabilities
Payable to Sponsor		4,537	4,325
Unrealized depreciation on foreign currency forward contracts		342,455	5,703
Total liabilities		346,992	10,028
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		5,540,957	5,473,848
Total liabilities and shareholders' equity		$ 5,887,949	$ 5,483,876
Shares outstanding		99,970	99,974
Net asset value per share		$ 55.43	$ 54.75
Market value per share		$ 55.52	$ 54.70

[1] 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.

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