ProShares Ultra Gold (UGL) 10-K 28 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 21, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity File Number	001-34200
Entity Registrant Name	ProShares Trust II
Entity Central Index Key	0001415311
Current Fiscal Year End Date	--12-31
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	87-6284802
Entity Address, Address Line One	c/o ProShare Capital Management LLC
Entity Address, Address Line Two	7501 Wisconsin Avenue
Entity Address, Address Line Three	Suite 1000
Entity Address, City or Town	Bethesda
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20814
City Area Code	240
Local Phone Number	497-6400
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	130,367,767
Entity Public Float		$ 0
Proshares Short Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		50,000
Title of 12(b) Security	ProShares Short Euro
Security Exchange Name	NYSEArca
Trading Symbol	EUFX
Entity Public Float			$ 22,130,000
ProShares Short VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,584,307
Title of 12(b) Security	ProShares Short VIX Short-Term Futures ETF
Security Exchange Name	NYSEArca
Trading Symbol	SVXY
Entity Public Float			333,148,618
Proshares Ultra Bloomberg Crude Oil [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		29,311,317
Title of 12(b) Security	ProShares Ultra Bloomberg Crude Oil
Security Exchange Name	NYSEArca
Trading Symbol	UCO
Entity Public Float			375,992,644
Proshares Ultra Bloomberg Natural Gas [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,528,150
Title of 12(b) Security	ProShares Ultra Bloomberg Natural Gas
Security Exchange Name	NYSEArca
Trading Symbol	BOIL
Entity Public Float			33,799,848
Proshares Ultra Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		400,000
Title of 12(b) Security	ProShares Ultra Euro
Security Exchange Name	NYSEArca
Trading Symbol	ULE
Entity Public Float			5,804,000
Proshares Ultra Gold [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,200,000
Title of 12(b) Security	ProShares Ultra Gold
Security Exchange Name	NYSEArca
Trading Symbol	UGL
Entity Public Float			85,410,000
Proshares Ultra Silver [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,296,526
Title of 12(b) Security	ProShares Ultra Silver
Security Exchange Name	NYSEArca
Trading Symbol	AGQ
Entity Public Float			178,626,866
ProShares Ultra VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		40,380,912
Title of 12(b) Security	ProShares Ultra VIX Short-Term Futures ETF
Security Exchange Name	NYSEArca
Trading Symbol	UVXY
Entity Public Float			548,899,419
Proshares Ultra Yen [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		49,970
Title of 12(b) Security	ProShares Ultra Yen
Security Exchange Name	NYSEArca
Trading Symbol	YCL
Entity Public Float			5,807,257
Proshares UltraPro 3X Crude Oil ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		15,500,000
Title of 12(b) Security	ProShares UltraPro 3x Crude Oil ETF
Security Exchange Name	NYSEArca
Trading Symbol	OILU
Entity Public Float			112,200,000
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,724,906
Title of 12(b) Security	ProShares UltraPro 3x Short Crude Oil ETF
Security Exchange Name	NYSEArca
Trading Symbol	OILD
Entity Public Float			15,715,094
ProShares UltraShort Australian Dollar [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		100,000
Title of 12(b) Security	ProShares UltraShort Australian Dollar
Security Exchange Name	NYSEArca
Trading Symbol	CROC
Entity Public Float			8,364,000
ProShares UltraShort Bloomberg Crude Oil [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,539,884
Title of 12(b) Security	ProShares UltraShort Bloomberg Crude Oil
Security Exchange Name	NYSEArca
Trading Symbol	SCO
Entity Public Float			69,162,814
ProShares UltraShort Bloomberg Natural Gas [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		174,832
Title of 12(b) Security	ProShares UltraShort Bloomberg Natural Gas
Security Exchange Name	NYSEArca
Trading Symbol	KOLD
Entity Public Float			3,817,363
ProShares UltraShort Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,950,000
Title of 12(b) Security	ProShares UltraShort Euro
Security Exchange Name	NYSEArca
Trading Symbol	EUO
Entity Public Float			134,302,000
ProShares UltraShort Gold [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		346,977
Title of 12(b) Security	ProShares UltraShort Gold
Security Exchange Name	NYSEArca
Trading Symbol	GLL
Entity Public Float			18,145,295
ProShares UltraShort Silver [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		466,976
Title of 12(b) Security	ProShares UltraShort Silver
Security Exchange Name	NYSEArca
Trading Symbol	ZSL
Entity Public Float			14,011,144
ProShares UltraShort Yen [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		499,290
Title of 12(b) Security	ProShares UltraShort Yen
Security Exchange Name	NYSEArca
Trading Symbol	YCS
Entity Public Float			47,696,843
ProShares VIX Mid-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,262,403
Title of 12(b) Security	ProShares VIX Mid-Term Futures ETF
Security Exchange Name	NYSEArca
Trading Symbol	VIXM
Entity Public Float			38,120,777
ProShares VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		26,001,317
Title of 12(b) Security	ProShares VIX Short-Term Futures ETF
Security Exchange Name	NYSEArca
Trading Symbol	VIXY
Entity Public Float			$ 246,663,184

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 770,114,050	$ 729,259,407
Receivable from capital shares sold	4,354,515	54,572,979
Securities sold receivable	3,883
Receivable on open futures contracts	85,104,325	79,899,070
Interest receivable	978,751	555,187
Total assets	2,418,724,202	2,071,016,481
Liabilities
Payable for capital shares redeemed		11,136,094
Payable on open futures contracts	50,904,424	32,074,054
Payable to Sponsor	1,747,549	1,541,554
Total liabilities	62,399,101	127,041,456
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	2,356,325,101	1,943,975,025
Total liabilities and shareholders' equity	$ 2,418,724,202	$ 2,071,016,481
Shares outstanding	130,367,767	75,842,768
U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 1,084,925,128	$ 785,085,860
Futures Contracts [Member]
Assets
Segregated cash balances	406,121,155	272,501,850
Swap Agreements [Member]
Assets
Segregated cash balances	12,539,000	53,486,000
Unrealized appreciation	52,840,748	20,646,726
Liabilities
Unrealized depreciation	7,370,428	74,098,074
Forward Agreements [Member]
Assets
Segregated cash balances		37,374,000
Unrealized appreciation		30,555,018
Liabilities
Unrealized depreciation		2,783,797
Foreign Currency Forward Contracts [Member]
Assets
Segregated cash balances	1,421,000	6,057,000
Unrealized appreciation	321,647	1,023,384
Liabilities
Unrealized depreciation	2,376,700	5,407,883
ProShares Short Euro [Member]
Assets
Cash	1,509,236	7,873,056
Interest receivable	2,434	7,641
Total assets	2,289,155	8,631,926
Liabilities
Payable on open futures contracts	5,100	5,250
Payable to Sponsor	1,860	6,990
Total liabilities	6,960	12,240
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	2,282,195	8,619,686
Total liabilities and shareholders' equity	$ 2,289,155	$ 8,631,926
Shares outstanding	50,000	200,000
Net asset value per share	$ 45.64	$ 43.10
Market value per share (Note 2)	$ 45.69	$ 43.08
ProShares Short Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 745,805	$ 599,429
ProShares Short Euro [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	31,680	151,800
ProShares Short VIX Short-Term Futures ETF [Member]
Assets
Cash	113,044,890	180,835,767
Receivable on open futures contracts	60,052,325	63,300,889
Interest receivable	123,214	142,222
Total assets	284,649,062	360,341,566
Liabilities
Payable on open futures contracts		15,448,037
Payable to Sponsor	211,883	297,266
Total liabilities	211,883	15,745,303
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	284,437,179	344,596,263
Total liabilities and shareholders' equity	$ 284,649,062	$ 360,341,566
Shares outstanding	4,334,307	8,134,307
Net asset value per share	$ 65.62	$ 42.36	[1]
Market value per share (Note 2)	$ 65.23	$ 42.30
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 56,929,436
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	54,499,197	$ 116,062,688
ProShares Ultra Bloomberg Crude Oil [Member]
Assets
Cash	86,168,083	123,257,905
Receivable from capital shares sold		12,991,664
Receivable on open futures contracts		190,440
Interest receivable	123,221	62,514
Total assets	310,368,837	441,765,830
Liabilities
Payable on open futures contracts	266,056	311,815
Payable to Sponsor	258,199	287,236
Total liabilities	524,255	73,366,176
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	309,844,582	368,399,654
Total liabilities and shareholders' equity	$ 310,368,837	$ 441,765,830
Shares outstanding	15,211,317	28,211,317
Net asset value per share	$ 20.37	$ 13.06
Market value per share (Note 2)	$ 20.46	$ 13.30
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 200,115,463	$ 280,502,900
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	2,147,480	13,563,407
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Assets
Segregated cash balances		11,197,000
Unrealized appreciation	21,814,590	0
Liabilities
Unrealized depreciation	0	72,767,125
ProShares Ultra Bloomberg Natural Gas [Member]
Assets
Cash	7,072,257	731,158
Receivable from capital shares sold		2,528,757
Receivable on open futures contracts	37,024
Interest receivable	10,591	11,508
Total assets	45,196,991	17,951,294
Liabilities
Payable on open futures contracts		3,309,741
Payable to Sponsor	36,786	24,113
Total liabilities	36,786	3,333,854
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	45,160,205	14,617,440
Total liabilities and shareholders' equity	$ 45,196,991	$ 17,951,294
Shares outstanding	5,378,150	578,150
Net asset value per share	$ 8.40	$ 25.28
Market value per share (Note 2)	$ 8.34	$ 25.82
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 27,530,314	$ 8,380,427
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	10,546,805	6,299,444
ProShares Ultra Euro [Member]
Assets
Cash	1,206,437	5,068,270
Interest receivable	1,496	6,718
Total assets	6,209,342	7,554,617
Liabilities
Payable to Sponsor	4,918	6,015
Total liabilities	4,918	10,048
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	6,204,424	7,544,569
Total liabilities and shareholders' equity	$ 6,209,342	$ 7,554,617
Shares outstanding	450,000	500,000
Net asset value per share	$ 13.79	$ 15.09
Market value per share (Note 2)	$ 13.77	$ 15.12
ProShares Ultra Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 3,970,412	$ 1,496,658
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]
Assets
Segregated cash balances	921,000	921,000
Unrealized appreciation	109,997	61,971
Liabilities
Unrealized depreciation	0	4,033
ProShares Ultra Gold [Member]
Assets
Cash	36,455,823	32,035,747
Interest receivable	45,921	15,303
Total assets	110,810,975	87,308,381
Liabilities
Payable for capital shares redeemed		3,712,654
Payable on open futures contracts	0	7,990
Payable to Sponsor	84,943	64,443
Total liabilities	84,943	3,785,087
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	110,726,032	83,523,294
Total liabilities and shareholders' equity	$ 110,810,975	$ 87,308,381
Shares outstanding	2,250,000	2,250,000
Net asset value per share	$ 49.21	$ 37.12
Market value per share (Note 2)	$ 49.05	$ 37.41
ProShares Ultra Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 66,177,998	$ 41,941,734
ProShares Ultra Gold [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	2,070,900	179,296
Receivable on open futures contracts	170,073
ProShares Ultra Gold [Member] | Swap Agreements [Member]
Assets
Unrealized appreciation	5,890,260
Liabilities
Unrealized depreciation	0
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Assets
Segregated cash balances		8,883,000
Unrealized appreciation		4,253,301
Liabilities
Unrealized depreciation		0
ProShares Ultra Silver [Member]
Assets
Cash	71,876,942	29,951,685
Interest receivable	91,720	16,306
Total assets	239,830,381	202,021,571
Liabilities
Payable on open futures contracts	398,936	47,576
Payable to Sponsor	176,603	149,619
Total liabilities	575,539	197,195
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	239,254,842	201,824,376
Total liabilities and shareholders' equity	$ 239,830,381	$ 202,021,571
Shares outstanding	7,546,526	7,646,526
Net asset value per share	$ 31.70	$ 26.39
Market value per share (Note 2)	$ 31.65	$ 26.37
ProShares Ultra Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 135,544,101	$ 123,795,806
ProShares Ultra Silver [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	7,181,720	521,057
ProShares Ultra Silver [Member] | Swap Agreements [Member]
Assets
Unrealized appreciation	25,135,898
Liabilities
Unrealized depreciation	0
ProShares Ultra Silver [Member] | Forward Agreements [Member]
Assets
Segregated cash balances		21,435,000
Unrealized appreciation		26,301,717
Liabilities
Unrealized depreciation		0
ProShares Ultra VIX Short-Term Futures ETF [Member]
Assets
Cash	179,318,928	104,967,557
Receivable from capital shares sold	87,500	8,149,949
Receivable on open futures contracts	20,666,579	11,407,017
Interest receivable	212,666	106,307
Total assets	562,277,336	222,583,868
Liabilities
Payable on open futures contracts	34,019,820	6,745,146
Payable to Sponsor	411,729	202,902
Total liabilities	34,641,333	8,278,997
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	527,636,003	214,304,871
Total liabilities and shareholders' equity	$ 562,277,336	$ 222,583,868
Shares outstanding	41,630,912	2,630,912
Net asset value per share	$ 12.67	$ 81.46	[1]
Market value per share (Note 2)	$ 12.89	$ 81.73
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 179,749,262
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	175,258,401	$ 70,020,038
ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member]
Assets
Segregated cash balances	6,984,000	27,933,000
Unrealized appreciation	0	0
Liabilities
Unrealized depreciation	209,784	1,330,949
ProShares Ultra Yen [Member]
Assets
Cash	3,283,138	2,419,531
Receivable from capital shares sold		2,846,576
Interest receivable	4,726	3,941
Total assets	5,595,968	5,756,235
Liabilities
Payable to Sponsor	4,475	2,443
Total liabilities	15,004	4,519
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	5,580,964	5,751,716
Total liabilities and shareholders' equity	$ 5,595,968	$ 5,756,235
Shares outstanding	99,970	99,970
Net asset value per share	$ 55.83	$ 57.53
Market value per share (Note 2)	$ 55.83	$ 57.55
ProShares Ultra Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 1,808,104
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]
Assets
Segregated cash balances	500,000	$ 307,000
Unrealized appreciation	0	179,187
Liabilities
Unrealized depreciation	10,529	2,076
Proshares UltraPro 3X Crude Oil ETF [Member]
Assets
Cash	12,393,273	38,690,241
Receivable from capital shares sold		2,597,148
Receivable on open futures contracts		551,842
Interest receivable	25,542	17,308
Total assets	73,000,005	87,728,540
Liabilities
Payable on open futures contracts	2,075,764
Payable to Sponsor	64,912	61,498
Total liabilities	2,140,676	61,498
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	70,859,329	87,667,042
Total liabilities and shareholders' equity	$ 73,000,005	$ 87,728,540
Shares outstanding	3,300,000	6,700,000
Net asset value per share	$ 21.47	$ 13.08
Market value per share (Note 2)	$ 21.60	$ 13.47
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 47,193,110	$ 20,979,876
Proshares UltraPro 3X Crude Oil ETF [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	13,388,080	24,892,125
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Assets
Cash	14,418,802	13,456,117
Securities sold receivable	3,883
Receivable on open futures contracts	2,120,078
Interest receivable	20,691	13,748
Total assets	91,463,267	18,772,977
Liabilities
Payable on open futures contracts		89,382
Payable to Sponsor	74,120	18,496
Total liabilities	74,120	107,878
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	91,389,147	18,665,099
Total liabilities and shareholders' equity	$ 91,463,267	$ 18,772,977
Shares outstanding	8,574,906	374,906
Net asset value per share	$ 10.66	$ 49.79	[1]
Market value per share (Note 2)	$ 10.58	$ 48.43
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 57,375,132
ProShares UltraPro 3X Short Crude Oil ETF [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	17,524,681	$ 5,303,112
ProShares UltraShort Australian Dollar [Member]
Assets
Cash	1,506,673	10,321,256
Receivable on open futures contracts		6,300
Interest receivable	1,707	8,475
Total assets	5,651,054	11,068,693
Liabilities
Payable on open futures contracts	37,725
Payable to Sponsor	4,717	8,360
Total liabilities	42,442	8,360
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	5,608,612	11,060,333
Total liabilities and shareholders' equity	$ 5,651,054	$ 11,068,693
Shares outstanding	100,000	200,000
Net asset value per share	$ 56.09	$ 55.30
Market value per share (Note 2)	$ 55.88	$ 54.92
ProShares UltraShort Australian Dollar [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 3,931,474	$ 299,537
ProShares UltraShort Australian Dollar [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	211,200	433,125
ProShares UltraShort Bloomberg Crude Oil [Member]
Assets
Cash	50,856,757	22,869,986
Receivable from capital shares sold	4,267,015	25,458,885
Receivable on open futures contracts	1,144,404	432,627
Interest receivable	54,165	36,428
Total assets	129,574,044	114,514,333
Liabilities
Payable on open futures contracts		48,600
Payable to Sponsor	88,432	88,422
Total liabilities	4,122,363	137,022
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	125,451,681	114,377,311
Total liabilities and shareholders' equity	$ 129,574,044	$ 114,514,333
Shares outstanding	10,289,884	3,839,884
Net asset value per share	$ 12.19	$ 29.79
Market value per share (Note 2)	$ 12.15	$ 29.28
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 62,199,283	$ 27,967,534
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	7,239,420	2,746,147
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Assets
Segregated cash balances	3,813,000	14,356,000
Unrealized appreciation	0	20,646,726
Liabilities
Unrealized depreciation	4,033,931	0
ProShares UltraShort Bloomberg Natural Gas [Member]
Assets
Cash	4,438,331	11,046,280
Receivable on open futures contracts		3,096,239
Interest receivable	6,522	11,379
Total assets	12,532,289	22,163,554
Liabilities
Payable for capital shares redeemed		4,321,588
Payable on open futures contracts	6,826
Payable to Sponsor	9,860	16,525
Total liabilities	16,686	4,338,113
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	12,515,603	17,825,441
Total liabilities and shareholders' equity	$ 12,532,289	$ 22,163,554
Shares outstanding	324,832	824,832
Net asset value per share	$ 38.53	$ 21.61
Market value per share (Note 2)	$ 38.82	$ 21.22
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 5,154,876	$ 299,714
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	2,932,560	7,709,942
ProShares UltraShort Euro [Member]
Assets
Cash	44,280,278	33,215,995
Interest receivable	60,723	15,999
Total assets	123,046,852	158,275,753
Liabilities
Payable for capital shares redeemed		2,427,020
Payable to Sponsor	99,508	128,696
Total liabilities	2,465,679	4,155,594
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	120,581,173	154,120,159
Total liabilities and shareholders' equity	$ 123,046,852	$ 158,275,753
Shares outstanding	4,500,000	6,350,000
Net asset value per share	$ 26.80	$ 24.27
Market value per share (Note 2)	$ 26.80	$ 24.25
ProShares UltraShort Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 78,590,100	$ 121,801,685
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]
Assets
Segregated cash balances		3,138,000
Unrealized appreciation	115,751	104,074
Liabilities
Unrealized depreciation	2,366,171	1,599,878
ProShares UltraShort Gold [Member]
Assets
Cash	8,993,715	12,563,184
Receivable on open futures contracts		1,700
Interest receivable	11,691	10,500
Total assets	22,262,798	19,105,095
Liabilities
Payable on open futures contracts	25,211
Payable to Sponsor	17,218	15,312
Total liabilities	1,215,238	1,006,098
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	21,047,560	18,098,997
Total liabilities and shareholders' equity	$ 22,262,798	$ 19,105,095
Shares outstanding	396,977	246,978
Net asset value per share	$ 53.02	$ 73.28
Market value per share (Note 2)	$ 53.21	$ 72.84
ProShares UltraShort Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 12,355,192	$ 3,989,563
ProShares UltraShort Gold [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	358,200	38,148
ProShares UltraShort Gold [Member] | Swap Agreements [Member]
Assets
Segregated cash balances	544,000
Unrealized appreciation	0
Liabilities
Unrealized depreciation	1,172,809
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Assets
Segregated cash balances		2,502,000
Unrealized appreciation		0
Liabilities
Unrealized depreciation		990,786
ProShares UltraShort Silver [Member]
Assets
Cash	5,300,012	5,677,665
Receivable on open futures contracts	4,800
Interest receivable	4,326	7,847
Total assets	15,818,205	13,578,709
Liabilities
Payable on open futures contracts	18,516	5,720
Payable to Sponsor	11,622	11,115
Total liabilities	1,984,042	1,809,846
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	13,834,163	11,768,863
Total liabilities and shareholders' equity	$ 15,818,205	$ 13,578,709
Shares outstanding	516,976	316,976
Net asset value per share	$ 26.76	$ 37.13
Market value per share (Note 2)	$ 26.80	$ 37.10
ProShares UltraShort Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 9,162,867	$ 3,294,766
ProShares UltraShort Silver [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	148,200	44,431
ProShares UltraShort Silver [Member] | Swap Agreements [Member]
Assets
Segregated cash balances	1,198,000
Unrealized appreciation	0
Liabilities
Unrealized depreciation	1,953,904
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Assets
Segregated cash balances		4,554,000
Unrealized appreciation		0
Liabilities
Unrealized depreciation		1,793,011
ProShares UltraShort Yen [Member]
Assets
Cash	12,507,112	21,879,254
Interest receivable	19,330	14,973
Total assets	38,165,164	59,214,608
Liabilities
Payable to Sponsor	32,844	49,037
Total liabilities	32,844	3,850,933
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	38,132,320	55,363,675
Total liabilities and shareholders' equity	$ 38,165,164	$ 59,214,608
Shares outstanding	499,290	749,290
Net asset value per share	$ 76.37	$ 73.89
Market value per share (Note 2)	$ 76.35	$ 73.86
ProShares UltraShort Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 25,542,823	$ 34,951,229
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]
Assets
Segregated cash balances		1,691,000
Unrealized appreciation	95,899	678,152
Liabilities
Unrealized depreciation	0	3,801,896
ProShares VIX Mid-Term Futures ETF [Member]
Assets
Cash	27,654,022	48,860,400
Interest receivable	34,527	29,104
Total assets	47,145,739	57,571,528
Liabilities
Payable for capital shares redeemed		674,832
Payable on open futures contracts	1,129,877	565,495
Payable to Sponsor	29,278	32,080
Total liabilities	1,159,155	1,272,407
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	45,986,584	56,299,121
Total liabilities and shareholders' equity	$ 47,145,739	$ 57,571,528
Shares outstanding	2,162,403	2,112,403
Net asset value per share	$ 21.27	$ 26.65
Market value per share (Note 2)	$ 21.29	$ 26.74
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 13,980,559
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	5,476,631	$ 8,682,024
ProShares VIX Short-Term Futures ETF [Member]
Assets
Cash	87,829,341	23,538,353
Receivable on open futures contracts	909,042	912,016
Interest receivable	123,538	16,966
Total assets	292,836,738	155,107,403
Liabilities
Payable on open futures contracts	12,920,593	5,489,302
Payable to Sponsor	123,642	70,986
Total liabilities	13,044,235	5,560,288
Commitments and Contingencies (Note 2)
Shareholders' equity
Shareholders' equity	279,792,503	149,547,115
Total liabilities and shareholders' equity	$ 292,836,738	$ 155,107,403
Shares outstanding	22,751,317	3,876,317
Net asset value per share	$ 12.30	$ 38.58
Market value per share (Note 2)	$ 12.43	$ 38.61
ProShares VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Assets
Short-term U.S. government and agency obligations (Note 3)	$ 96,868,817	$ 114,785,002
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Assets
Segregated cash balances	$ 107,106,000	$ 15,855,066
[1]	See Note 1 of these Notes to Financial Statements.

Statements of Financial Condi_2

Statements of Financial Condition (Parenthetical) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Short-term U.S. government and agency obligations, cost	$ 1,084,860,512	$ 785,069,552
ProShares Short Euro [Member]
Short-term U.S. government and agency obligations, cost	745,775	599,431
ProShares Short VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	56,926,750	0
ProShares Ultra Bloomberg Crude Oil [Member]
Short-term U.S. government and agency obligations, cost	200,101,525	280,497,709
ProShares Ultra Bloomberg Natural Gas [Member]
Short-term U.S. government and agency obligations, cost	27,528,924	8,380,716
ProShares Ultra Euro [Member]
Short-term U.S. government and agency obligations, cost	3,970,204	1,496,665
ProShares Ultra Gold [Member]
Short-term U.S. government and agency obligations, cost	66,174,584	41,941,207
ProShares Ultra Silver [Member]
Short-term U.S. government and agency obligations, cost	135,537,081	123,793,893
ProShares Ultra VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	179,736,532
ProShares Ultra Yen [Member]
Short-term U.S. government and agency obligations, cost	1,808,030
Proshares UltraPro 3X Crude Oil ETF [Member]
Short-term U.S. government and agency obligations, cost	47,190,714	20,979,000
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Short-term U.S. government and agency obligations, cost	57,372,196
ProShares UltraShort Australian Dollar [Member]
Short-term U.S. government and agency obligations, cost	3,931,268	299,548
ProShares UltraShort Bloomberg Crude Oil [Member]
Short-term U.S. government and agency obligations, cost	62,196,121	27,967,127
ProShares UltraShort Bloomberg Natural Gas [Member]
Short-term U.S. government and agency obligations, cost	5,154,603	299,715
ProShares UltraShort Euro [Member]
Short-term U.S. government and agency obligations, cost	78,586,073	121,798,837
ProShares UltraShort Gold [Member]
Short-term U.S. government and agency obligations, cost	12,354,582	3,989,775
ProShares UltraShort Silver [Member]
Short-term U.S. government and agency obligations, cost	9,162,163	3,294,789
ProShares UltraShort Yen [Member]
Short-term U.S. government and agency obligations, cost	25,541,523	34,950,807
ProShares VIX Mid-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	13,979,509
ProShares VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	$ 96,862,355	$ 114,780,333

Statements of Operations

Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment Income
Interest	$ 42,299,579	$ 32,979,194	$ 25,704,093	[1]
Expenses
Management fee	21,893,743	23,335,844	30,996,127	[1]
Brokerage commissions	4,922,076	5,852,459	8,950,082	[1]
Brokerage fees	38,453	156,052	9,715	[1]
Offering costs		105,643	238,151	[1]
Limitation by Sponsor		(27,133)	(59,651)	[1]
Non-recurring fees and expenses	426,058
Total expenses	27,280,330	29,422,865	40,134,424	[1]
Net investment income (loss)	15,019,249	3,556,329	(14,430,331)	[1]
Net realized gain (loss) on
Net realized gain (loss)	(447,021,139)	(1,483,065,223)	(438,531,686)	[1]
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	8,263,887	(52,874,307)	(5,496,117)	[1]
Net realized and unrealized gain (loss)	(438,757,252)	(1,535,939,530)	(444,027,803)	[1]
Net income (loss)	(423,738,003)	(1,532,383,201)	(458,458,134)	[1]
Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(568,174,940)	(1,441,403,318)	(354,314,223)	[1]
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(65,264,314)	26,203,793	(360,935)	[1]
Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	76,076,549	(2,745,254)	(11,794,313)	[1]
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	98,921,668	(85,082,567)	(11,520,471)	[1]
Forward Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	33,894,330	(58,472,765)	(26,118,074)	[1]
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(27,771,221)	5,593,954	43,166,751	[1]
Foreign Currency Forward Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	11,101,620	19,830,895	(46,255,034)	[1]
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	2,329,446	203,179	(36,579,460)	[1]
U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	81,302	(274,781)	(50,042)	[1]
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	48,308	207,334	(202,002)	[1]
ProShares Short Euro [Member]
Investment Income
Interest	314,021	123,954	75,953
Expenses
Management fee	135,292	78,253	111,736
Brokerage commissions	2,478	1,244	1,844
Total expenses	137,770	79,497	113,580
Net investment income (loss)	176,251	44,457	(37,627)
Net realized gain (loss) on
Net realized gain (loss)	973,665	459,984	(1,162,371)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	29,313	123,365	(299,569)
Net realized and unrealized gain (loss)	1,002,978	583,349	(1,461,940)
Net income (loss)	1,179,229	627,806	(1,499,567)
ProShares Short Euro [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	972,479	459,984	(1,161,987)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	29,281	123,007	(299,188)
ProShares Short Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	1,186		(384)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	32	358	(381)
ProShares Short VIX Short-Term Futures ETF [Member]
Investment Income
Interest	5,618,666	5,721,966	6,001,679
Expenses
Management fee	3,333,950	5,617,477	7,147,223
Brokerage commissions	723,282	2,162,086	4,226,442
Brokerage fees	721	151,758	1,558
Non-recurring fees and expenses	398,550
Total expenses	4,456,503	7,931,321	11,375,223
Net investment income (loss)	1,162,163	(2,209,355)	(5,373,544)
Net realized gain (loss) on
Net realized gain (loss)	125,641,839	(1,885,823,832)	897,400,073
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	24,733,759	(31,465,785)	27,294,500
Net realized and unrealized gain (loss)	150,375,598	(1,917,289,617)	924,694,573
Net income (loss)	151,537,761	(1,919,498,972)	919,321,029
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	125,639,084	(1,885,564,719)	897,400,516
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	24,731,073	(31,517,650)	27,351,060
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	2,755	(259,113)	(443)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	2,686	51,865	(56,560)
ProShares Ultra Bloomberg Crude Oil [Member]
Investment Income
Interest	7,627,706	7,041,517	5,982,049
Expenses
Management fee	3,612,580	3,918,014	7,120,247
Brokerage commissions	150,542	100,695	241,263
Total expenses	3,763,122	4,018,709	7,361,510
Net investment income (loss)	3,864,584	3,022,808	(1,379,461)
Net realized gain (loss) on
Net realized gain (loss)	144,188,809	21,754,687	22,131,716
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	109,396,338	(160,959,424)	13,257,749
Net realized and unrealized gain (loss)	253,585,147	(139,204,737)	35,389,465
Net income (loss)	257,449,731	(136,181,929)	34,010,004
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	22,428,157	(3,149,395)	28,048,922
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	14,805,876	(25,986,280)	6,408,814
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	121,742,316	24,906,389	(5,902,710)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	94,581,715	(135,005,486)	6,879,790
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	18,336	(2,307)	(14,496)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	8,747	32,342	(30,855)
ProShares Ultra Bloomberg Natural Gas [Member]
Investment Income
Interest	589,183	489,924	339,079
Expenses
Management fee	297,043	305,706	446,589
Brokerage commissions	129,752	87,899	126,252
Total expenses	426,795	393,605	572,841
Net investment income (loss)	162,388	96,319	(233,762)
Net realized gain (loss) on
Net realized gain (loss)	(32,380,218)	21,092,833	(40,794,286)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	7,672,614	(17,547,032)	4,686,596
Net realized and unrealized gain (loss)	(24,707,604)	3,545,801	(36,107,690)
Net income (loss)	(24,545,216)	3,642,120	(36,341,452)
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(32,380,194)	21,092,864	(40,793,265)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	7,670,935	(17,548,973)	4,689,090
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	(24)	(31)	(1,021)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	1,679	1,941	(2,494)
ProShares Ultra Euro [Member]
Investment Income
Interest	121,071	112,904	94,761
Expenses
Management fee	62,543	82,081	124,543
Total expenses	62,543	82,081	124,543
Net investment income (loss)	58,528	30,823	(29,782)
Net realized gain (loss) on
Net realized gain (loss)	(722,691)	(1,063,816)	2,212,226
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	52,274	(205,861)	837,700
Net realized and unrealized gain (loss)	(670,417)	(1,269,677)	3,049,926
Net income (loss)	(611,889)	(1,238,854)	3,020,144
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(722,691)	(1,063,823)	2,212,313
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	52,059	(206,214)	838,162
ProShares Ultra Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)		7	(87)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	215	353	(462)
ProShares Ultra Gold [Member]
Investment Income
Interest	1,798,692	1,437,347	766,560
Expenses
Management fee	884,410	811,581	902,841
Brokerage commissions	11,345	135	48
Total expenses	895,755	811,716	902,889
Net investment income (loss)	902,937	625,631	(136,329)
Net realized gain (loss) on
Net realized gain (loss)	19,588,339	(7,345,178)	11,485,101
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	3,815,690	680,186	8,096,461
Net realized and unrealized gain (loss)	23,404,029	(6,664,992)	19,581,562
Net income (loss)	24,306,966	(6,039,361)	19,445,233
ProShares Ultra Gold [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	2,697,508	(21,640)	2,839
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	2,175,844	67,190	24,440
ProShares Ultra Gold [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	12,099,826
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	5,890,260
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	4,790,603	(7,323,366)	11,481,571
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(4,253,301)	606,946	8,077,462
ProShares Ultra Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	402	(172)	691
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	2,887	6,050	(5,441)
ProShares Ultra Silver [Member]
Investment Income
Interest	3,823,565	3,490,072	2,142,183
Expenses
Management fee	1,928,478	2,020,586	2,551,877
Brokerage commissions	38,814	307	58
Brokerage fees	3
Total expenses	1,967,295	2,020,893	2,551,935
Net investment income (loss)	1,856,270	1,469,179	(409,752)
Net realized gain (loss) on
Net realized gain (loss)	34,374,143	(57,489,729)	(31,762,627)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	4,223,101	4,931,185	42,712,371
Net realized and unrealized gain (loss)	38,597,244	(52,558,544)	10,949,744
Net income (loss)	40,453,514	(51,089,365)	10,539,992
ProShares Ultra Silver [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	2,780,204	(32,131)	(21,522)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	5,383,813	339,136	28,960
ProShares Ultra Silver [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(779,534)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	25,135,898
ProShares Ultra Silver [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	32,366,374	(57,456,395)	(31,741,312)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(26,301,717)	4,566,383	42,711,523
ProShares Ultra Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	7,099	(1,203)	207
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	5,107	25,666	(28,112)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Investment Income
Interest	7,903,309	3,853,146	3,040,059
Expenses
Management fee	4,819,171	3,966,185	3,960,999
Brokerage commissions	2,936,813	3,032,632	3,970,588
Brokerage fees	24,765		4,533
Non-recurring fees and expenses	27,508
Total expenses	7,808,257	6,998,817	7,936,120
Net investment income (loss)	95,052	(3,145,671)	(4,896,061)
Net realized gain (loss) on
Net realized gain (loss)	(612,840,041)	389,993,011	(1,020,772,793)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(77,766,851)	65,652,401	(26,502,876)
Net realized and unrealized gain (loss)	(690,606,892)	455,645,412	(1,047,275,669)
Net income (loss)	(690,511,840)	452,499,741	(1,052,171,730)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(561,156,010)	379,449,269	(1,020,750,851)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(78,900,746)	66,970,085	(26,493,883)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(51,702,622)	10,551,473
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	1,121,165	(1,330,949)
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	18,591	(7,731)	(21,942)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	12,730	13,265	(8,993)
ProShares Ultra Yen [Member]
Investment Income
Interest	78,463	26,930	28,639
Expenses
Management fee	39,949	27,913	50,521
Total expenses	39,949	27,913	50,521
Net investment income (loss)	38,514	(983)	(21,882)
Net realized gain (loss) on
Net realized gain (loss)	57,990	(170,364)	(46,278)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(187,566)	212,218	307,194
Net realized and unrealized gain (loss)	(129,576)	41,854	260,916
Net income (loss)	(91,062)	40,871	239,034
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	58,152	(170,364)	(46,195)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(187,640)	211,935	307,252
ProShares Ultra Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	(162)		(83)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	74	283	(58)
Proshares UltraPro 3X Crude Oil ETF [Member]
Investment Income
Interest	2,114,130	351,928	9,696
Expenses
Management fee	1,049,564	277,762
Brokerage commissions	334,485	86,561	34,408
Brokerage fees			67
Offering costs		52,846	119,081
Limitation by Sponsor		(26,957)	(24,342)
Total expenses	1,384,049	390,212	129,214
Net investment income (loss)	730,081	(38,284)	(119,518)
Net realized gain (loss) on
Net realized gain (loss)	69,178,251	(37,435,672)	6,018,618
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	30,719,431	(24,868,483)	1,417,998
Net realized and unrealized gain (loss)	99,897,682	(62,304,155)	7,436,616
Net income (loss)	100,627,763	(62,342,439)	7,317,098
Proshares UltraPro 3X Crude Oil ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	69,170,933	(37,435,672)	6,018,618
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	30,717,911	(24,869,359)	1,417,998
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	7,318
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	1,520	876
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Investment Income
Interest	562,435	190,658	5,930
Expenses
Management fee	312,430	176,390
Brokerage commissions	146,608	70,338	32,624
Brokerage fees			135
Offering costs		52,797	119,070
Limitation by Sponsor		(176)	(35,309)
Total expenses	459,038	299,349	116,520
Net investment income (loss)	103,397	(108,691)	(110,590)
Net realized gain (loss) on
Net realized gain (loss)	(2,404,520)	7,377,281	(7,046,628)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(15,374,595)	10,007,630	(2,988,155)
Net realized and unrealized gain (loss)	(17,779,115)	17,384,911	(10,034,783)
Net income (loss)	(17,675,718)	17,276,220	(10,145,373)
ProShares UltraPro 3X Short Crude Oil ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(2,410,550)	7,377,281	(7,046,628)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(15,377,531)	10,007,630	(2,988,155)
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	6,030
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	2,936
ProShares UltraShort Australian Dollar [Member]
Investment Income
Interest	159,039	119,098	85,306
Expenses
Management fee	72,858	75,944	123,234
Brokerage commissions	5,856	6,408	8,846
Total expenses	78,714	82,352	132,080
Net investment income (loss)	80,325	36,746	(46,774)
Net realized gain (loss) on
Net realized gain (loss)	833,199	128,204	(866,949)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(735,608)	1,406,028	(2,076,278)
Net realized and unrealized gain (loss)	97,591	1,534,232	(2,943,227)
Net income (loss)	177,916	1,570,978	(2,990,001)
ProShares UltraShort Australian Dollar [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	833,171	128,451	(866,771)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(735,825)	1,405,045	(2,075,560)
ProShares UltraShort Australian Dollar [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	28	(247)	(178)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	217	983	(718)
ProShares UltraShort Bloomberg Crude Oil [Member]
Investment Income
Interest	1,570,676	2,758,399	1,661,295
Expenses
Management fee	769,401	1,663,576	1,934,688
Brokerage commissions	91,476	56,193	82,258
Total expenses	860,877	1,719,769	2,016,946
Net investment income (loss)	709,799	1,038,630	(355,651)
Net realized gain (loss) on
Net realized gain (loss)	(14,247,456)	(42,039,983)	(6,491,508)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(31,068,746)	58,511,410	(20,957,983)
Net realized and unrealized gain (loss)	(45,316,202)	16,471,427	(27,449,491)
Net income (loss)	(44,606,403)	17,510,057	(27,805,142)
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(13,850,702)	(3,836,970)	(599,457)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(6,390,844)	7,234,803	(2,535,833)
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(400,998)	(38,203,116)	(5,891,603)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(24,680,657)	51,253,868	(18,400,261)
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	4,244	103	(448)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	2,755	22,739	(21,889)
ProShares UltraShort Bloomberg Natural Gas [Member]
Investment Income
Interest	167,939	121,027	38,651
Expenses
Management fee	83,978	84,418	63,534
Brokerage commissions	54,544	41,063	29,529
Brokerage fees			39
Total expenses	138,522	125,481	93,102
Net investment income (loss)	29,417	(4,454)	(54,451)
Net realized gain (loss) on
Net realized gain (loss)	19,286,567	(14,147,964)	4,761,749
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(10,165,386)	11,934,953	(614,897)
Net realized and unrealized gain (loss)	9,121,181	(2,213,011)	4,146,852
Net income (loss)	9,150,598	(2,217,465)	4,092,401
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	19,286,567	(14,147,964)	4,762,532
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(10,165,660)	11,935,038	(615,018)
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)			(783)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	274	(85)	121
ProShares UltraShort Euro [Member]
Investment Income
Interest	2,822,207	3,045,321	2,048,455
Expenses
Management fee	1,293,377	1,720,827	2,445,170
Total expenses	1,293,377	1,720,827	2,445,170
Net investment income (loss)	1,528,830	1,324,494	(396,715)
Net realized gain (loss) on
Net realized gain (loss)	13,747,208	18,953,236	(39,695,465)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(753,437)	4,869,355	(22,527,463)
Net realized and unrealized gain (loss)	12,993,771	23,822,591	(62,222,928)
Net income (loss)	14,522,601	25,147,085	(62,619,643)
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	13,745,299	18,953,455	(39,691,680)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(754,616)	4,848,465	(22,507,200)
ProShares UltraShort Euro [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	1,909	(219)	(3,785)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	1,179	20,890	(20,263)
ProShares UltraShort Gold [Member]
Investment Income
Interest	380,158	423,926	283,917
Expenses
Management fee	188,089	252,524	344,734
Brokerage commissions	5,355	61	48
Total expenses	193,444	252,585	344,782
Net investment income (loss)	186,714	171,341	(60,865)
Net realized gain (loss) on
Net realized gain (loss)	(5,192,568)	1,323,731	(6,994,765)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(540,991)	472,667	(4,548,271)
Net realized and unrealized gain (loss)	(5,733,559)	1,796,398	(11,543,036)
Net income (loss)	(5,546,845)	1,967,739	(11,603,901)
ProShares UltraShort Gold [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(1,183,722)	21,620	(2,987)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(359,790)	(26,320)	(24,440)
ProShares UltraShort Gold [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(2,891,389)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(1,172,809)
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(1,118,149)	1,301,959	(6,990,570)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	990,786	497,473	(4,521,825)
ProShares UltraShort Gold [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	692	152	(1,208)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	822	1,514	(2,006)
ProShares UltraShort Silver [Member]
Investment Income
Interest	279,294	309,090	157,745
Expenses
Management fee	139,668	196,546	194,297
Brokerage commissions	7,713	72	48
Total expenses	147,381	196,618	194,345
Net investment income (loss)	131,913	112,472	(36,600)
Net realized gain (loss) on
Net realized gain (loss)	(4,544,544)	5,022,945	1,152,461
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(197,430)	(117,191)	(3,132,869)
Net realized and unrealized gain (loss)	(4,741,974)	4,905,754	(1,980,408)
Net income (loss)	(4,610,061)	5,018,226	(2,017,008)
ProShares UltraShort Silver [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(409,222)	19,939	21,156
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(37,264)	(43,267)	(28,960)
ProShares UltraShort Silver [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(1,991,050)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(1,953,904)
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Net realized gain (loss)	(2,144,498)	5,005,037	1,132,237
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	1,793,011	(76,848)	(3,100,409)
ProShares UltraShort Silver [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	226	(2,031)	(932)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	727	2,924	(3,500)
ProShares UltraShort Yen [Member]
Investment Income
Interest	1,007,112	1,399,342	1,446,842
Expenses
Management fee	451,638	791,468	1,802,816
Total expenses	451,638	791,468	1,802,816
Net investment income (loss)	555,474	607,874	(355,974)
Net realized gain (loss) on
Net realized gain (loss)	(1,979,679)	2,111,630	(8,733,473)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	3,220,521	(4,640,285)	(15,227,152)
Net realized and unrealized gain (loss)	1,240,842	(2,528,655)	(23,960,625)
Net income (loss)	1,796,316	(1,920,781)	(24,316,599)
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(1,979,140)	2,111,627	(8,729,472)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	3,219,643	(4,651,007)	(15,217,674)
ProShares UltraShort Yen [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	(539)	3	(4,001)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	878	10,722	(9,478)
ProShares VIX Mid-Term Futures ETF [Member]
Investment Income
Interest	903,643	368,351	256,920
Expenses
Management fee	380,474	221,717	317,739
Brokerage commissions	29,956	30,306	20,988
Total expenses	410,430	252,023	338,727
Net investment income (loss)	493,213	116,328	(81,807)
Net realized gain (loss) on
Net realized gain (loss)	(6,228,644)	4,332,654	(25,320,147)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(6,037,881)	5,973,199	(926,594)
Net realized and unrealized gain (loss)	(12,266,525)	10,305,853	(26,246,741)
Net income (loss)	(11,773,312)	10,422,181	(26,328,548)
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(6,228,652)	4,332,654	(25,319,770)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(6,038,931)	5,973,386	(927,035)
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	8		(377)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	1,050	(187)	441
ProShares VIX Short-Term Futures ETF [Member]
Investment Income
Interest	4,458,270	1,594,294	1,238,374
Expenses
Management fee	2,038,850	1,046,876	1,353,339
Brokerage commissions	253,057	176,459	174,838
Brokerage fees	12,964	4,294	3,383
Total expenses	2,304,871	1,227,629	1,531,560
Net investment income (loss)	2,153,399	366,665	(293,186)
Net realized gain (loss) on
Net realized gain (loss)	(194,350,788)	89,901,119	(194,006,340)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(32,770,663)	22,155,157	(4,304,579)
Net realized and unrealized gain (loss)	(227,121,451)	112,056,276	(198,310,919)
Net income (loss)	(224,968,052)	112,422,941	(198,604,105)
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Net realized gain (loss)	(194,363,991)	89,903,111	(194,005,568)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	(32,772,456)	22,140,322	(4,293,225)
ProShares VIX Short-Term Futures ETF [Member] | U.S. Government Agencies Short-term Debt Securities [Member]
Net realized gain (loss) on
Net realized gain (loss)	13,203	(1,992)	(772)
Change in net unrealized appreciation (depreciation) on
Change in net unrealized appreciation (depreciation)	$ 1,793	$ 14,835	$ (11,354)
[1]	The operations include the activity of ProShares UltraPro 3x Crude Oil ETF and ProShares UltraPro 3x Short Crude Oil ETF since January 13, 2017 (inception date).

Statements of Changes in Shareh

Statements of Changes in Shareholders' Equity - USD ($)	Total		ProShares Short Euro [Member]	ProShares Short VIX Short-Term Futures ETF [Member]	ProShares Ultra Bloomberg Crude Oil [Member]	ProShares Ultra Bloomberg Natural Gas [Member]	ProShares Ultra Euro [Member]	ProShares Ultra Gold [Member]	ProShares Ultra Silver [Member]	ProShares Ultra VIX Short-Term Futures ETF [Member]	ProShares Ultra Yen [Member]	Proshares UltraPro 3X Crude Oil ETF [Member]	ProShares UltraPro 3X Short Crude Oil ETF [Member]	ProShares UltraShort Australian Dollar [Member]	ProShares UltraShort Bloomberg Crude Oil [Member]	ProShares UltraShort Bloomberg Natural Gas [Member]	ProShares UltraShort Euro [Member]	ProShares UltraShort Gold [Member]	ProShares UltraShort Silver [Member]	ProShares UltraShort Yen [Member]	ProShares VIX Mid-Term Futures ETF [Member]	ProShares VIX Short-Term Futures ETF [Member]
Shareholders' equity, beginning of period at Dec. 31, 2016	$ 3,276,337,487	[1]	$ 15,770,088	$ 228,075,387	$ 933,731,860	$ 43,203,386	$ 11,914,585	$ 92,127,200	$ 275,779,940	$ 515,758,754	$ 5,540,957			$ 16,613,473	$ 200,958,303	$ 4,038,794	$ 349,392,650	$ 63,653,647	$ 23,017,656	$ 276,781,747	$ 45,818,914	$ 174,160,146
Addition of shares	9,098,339,966	[1]		3,985,678,031	1,156,816,574	106,004,594	25,220,169	23,949,465	50,514,699	2,602,989,881		$ 40,659,738	$ 38,429,372	4,801,797	510,910,744	23,216,158	54,352,755	26,178,336	26,717,920	76,657,434	26,311,779	318,930,520
Redemption of shares	(8,968,941,107)	[1]	(6,278,641)	(4,362,910,576)	(1,600,112,912)	(49,597,578)	(30,563,382)	(41,813,150)	(78,589,935)	(1,672,541,764)	(2,915,722)	(36,641,353)	(7,122,823)	(4,723,167)	(458,220,621)	(24,444,610)	(138,577,565)	(46,730,672)	(32,912,309)	(198,045,129)	(19,454,197)	(156,745,001)
Net addition (redemption) of shares	129,398,859	[1]	(6,278,641)	(377,232,545)	(443,296,338)	56,407,016	(5,343,213)	(17,863,685)	(28,075,236)	930,448,117	(2,915,722)	4,018,385	31,306,549	78,630	52,690,123	(1,228,452)	(84,224,810)	(20,552,336)	(6,194,389)	(121,387,695)	6,857,582	162,185,519
Net investment income (loss)	(14,430,331)	[1]	(37,627)	(5,373,544)	(1,379,461)	(233,762)	(29,782)	(136,329)	(409,752)	(4,896,061)	(21,882)	(119,518)	(110,590)	(46,774)	(355,651)	(54,451)	(396,715)	(60,865)	(36,600)	(355,974)	(81,807)	(293,186)
Net realized gain (loss)	(438,531,686)	[1]	(1,162,371)	897,400,073	22,131,716	(40,794,286)	2,212,226	11,485,101	(31,762,627)	(1,020,772,793)	(46,278)	6,018,618	(7,046,628)	(866,949)	(6,491,508)	4,761,749	(39,695,465)	(6,994,765)	1,152,461	(8,733,473)	(25,320,147)	(194,006,340)
Change in net unrealized appreciation (depreciation)	(5,496,117)	[1]	(299,569)	27,294,500	13,257,749	4,686,596	837,700	8,096,461	42,712,371	(26,502,876)	307,194	1,417,998	(2,988,155)	(2,076,278)	(20,957,983)	(614,897)	(22,527,463)	(4,548,271)	(3,132,869)	(15,227,152)	(926,594)	(4,304,579)
Net income (loss)	(458,458,134)	[1]	(1,499,567)	919,321,029	34,010,004	(36,341,452)	3,020,144	19,445,233	10,539,992	(1,052,171,730)	239,034	7,317,098	(10,145,373)	(2,990,001)	(27,805,142)	4,092,401	(62,619,643)	(11,603,901)	(2,017,008)	(24,316,599)	(26,328,548)	(198,604,105)
Shareholders' equity, end of period at Dec. 31, 2017	2,947,278,212	[1]	7,991,880	770,163,871	524,445,526	63,268,950	9,591,516	93,708,748	258,244,696	394,035,141	2,864,269	11,335,483	21,161,176	13,702,102	225,843,284	6,902,743	202,548,197	31,497,410	14,806,259	131,077,453	26,347,948	137,741,560
Addition of shares	6,250,352,624			2,433,234,181	518,136,436	53,884,378	2,653,492	20,994,687	56,650,169	2,228,542,993	2,846,576	186,003,485	62,030,238	5,028,505	247,024,351	53,822,972	37,244,830	16,527,151	27,656,086	7,078,646	56,218,143	234,775,305
Redemption of shares	(5,721,272,610)			(939,302,817)	(538,000,379)	(106,178,008)	(3,461,585)	(25,140,780)	(61,981,124)	(2,860,773,004)		(47,329,487)	(81,802,535)	(9,241,252)	(376,000,381)	(40,682,809)	(110,819,953)	(31,893,303)	(35,711,708)	(80,871,643)	(36,689,151)	(335,392,691)
Net addition (redemption) of shares	529,080,014			1,493,931,364	(19,863,943)	(52,293,630)	(808,093)	(4,146,093)	(5,330,955)	(632,230,011)	2,846,576	138,673,998	(19,772,297)	(4,212,747)	(128,976,030)	13,140,163	(73,575,123)	(15,366,152)	(8,055,622)	(73,792,997)	19,528,992	(100,617,386)
Net investment income (loss)	3,556,329		44,457	(2,209,355)	3,022,808	96,319	30,823	625,631	1,469,179	(3,145,671)	(983)	(38,284)	(108,691)	36,746	1,038,630	(4,454)	1,324,494	171,341	112,472	607,874	116,328	366,665
Net realized gain (loss)	(1,483,065,223)		459,984	(1,885,823,832)	21,754,687	21,092,833	(1,063,816)	(7,345,178)	(57,489,729)	389,993,011	(170,364)	(37,435,672)	7,377,281	128,204	(42,039,983)	(14,147,964)	18,953,236	1,323,731	5,022,945	2,111,630	4,332,654	89,901,119
Change in net unrealized appreciation (depreciation)	(52,874,307)		123,365	(31,465,785)	(160,959,424)	(17,547,032)	(205,861)	680,186	4,931,185	65,652,401	212,218	(24,868,483)	10,007,630	1,406,028	58,511,410	11,934,953	4,869,355	472,667	(117,191)	(4,640,285)	5,973,199	22,155,157
Net income (loss)	(1,532,383,201)		627,806	(1,919,498,972)	(136,181,929)	3,642,120	(1,238,854)	(6,039,361)	(51,089,365)	452,499,741	40,871	(62,342,439)	17,276,220	1,570,978	17,510,057	(2,217,465)	25,147,085	1,967,739	5,018,226	(1,920,781)	10,422,181	112,422,941
Shareholders' equity, end of period at Dec. 31, 2018	1,943,975,025		8,619,686	344,596,263	368,399,654	14,617,440	7,544,569	83,523,294	201,824,376	214,304,871	5,751,716	87,667,042	18,665,099	11,060,333	114,377,311	17,825,441	154,120,159	18,098,997	11,768,863	55,363,675	56,299,121	149,547,115
Addition of shares	5,130,205,439		13,205,150	84,372,594	569,843,253	115,544,309	1,422,682	38,466,355	62,741,459	2,454,259,697	11,322,305	251,308,636	304,935,397	3,004,977	397,696,425	30,089,484	27,861,560	39,522,691	35,269,175	34,403,213	31,405,087	623,530,990
Redemption of shares	(4,294,117,360)		(20,721,870)	(296,069,439)	(885,848,056)	(60,456,328)	(2,150,938)	(35,570,583)	(65,764,507)	(1,450,416,725)	(11,401,995)	(368,744,112)	(214,535,631)	(8,634,614)	(342,015,652)	(44,549,920)	(75,923,147)	(31,027,283)	(28,593,814)	(53,430,884)	(29,944,312)	(268,317,550)
Net addition (redemption) of shares	836,088,079		(7,516,720)	(211,696,845)	(316,004,803)	55,087,981	(728,256)	2,895,772	(3,023,048)	1,003,842,972	(79,690)	(117,435,476)	90,399,766	(5,629,637)	55,680,773	(14,460,436)	(48,061,587)	8,495,408	6,675,361	(19,027,671)	1,460,775	355,213,440
Net investment income (loss)	15,019,249		176,251	1,162,163	3,864,584	162,388	58,528	902,937	1,856,270	95,052	38,514	730,081	103,397	80,325	709,799	29,417	1,528,830	186,714	131,913	555,474	493,213	2,153,399
Net realized gain (loss)	(447,021,139)		973,665	125,641,839	144,188,809	(32,380,218)	(722,691)	19,588,339	34,374,143	(612,840,041)	57,990	69,178,251	(2,404,520)	833,199	(14,247,456)	19,286,567	13,747,208	(5,192,568)	(4,544,544)	(1,979,679)	(6,228,644)	(194,350,788)
Change in net unrealized appreciation (depreciation)	8,263,887		29,313	24,733,759	109,396,338	7,672,614	52,274	3,815,690	4,223,101	(77,766,851)	(187,566)	30,719,431	(15,374,595)	(735,608)	(31,068,746)	(10,165,386)	(753,437)	(540,991)	(197,430)	3,220,521	(6,037,881)	(32,770,663)
Net income (loss)	(423,738,003)		1,179,229	151,537,761	257,449,731	(24,545,216)	(611,889)	24,306,966	40,453,514	(690,511,840)	(91,062)	100,627,763	(17,675,718)	177,916	(44,606,403)	9,150,598	14,522,601	(5,546,845)	(4,610,061)	1,796,316	(11,773,312)	(224,968,052)
Shareholders' equity, end of period at Dec. 31, 2019	$ 2,356,325,101		$ 2,282,195	$ 284,437,179	$ 309,844,582	$ 45,160,205	$ 6,204,424	$ 110,726,032	$ 239,254,842	$ 527,636,003	$ 5,580,964	$ 70,859,329	$ 91,389,147	$ 5,608,612	$ 125,451,681	$ 12,515,603	$ 120,581,173	$ 21,047,560	$ 13,834,163	$ 38,132,320	$ 45,986,584	$ 279,792,503
[1]	The operations include the activity of ProShares UltraPro 3x Crude Oil ETF and ProShares UltraPro 3x Short Crude Oil ETF since January 13, 2017 (inception date).

Statements of Changes in Shar_2

Statements of Changes in Shareholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Addition, shares	229,600,000	125,567,500	135,939,510
Redemption, shares	175,075,001	123,725,617	144,218,291
Net addition (redemption), shares	54,524,999	1,841,883	(8,278,781)
ProShares Short Euro [Member]
Addition, shares	300,000	0	0
Redemption, shares	450,000	0	150,000
Net addition (redemption), shares	(150,000)	0	(150,000)
ProShares Short VIX Short-Term Futures ETF [Member]
Addition, shares	1,500,000	19,000,000	13,137,500
Redemption, shares	5,300,000	12,378,193	12,875,000
Net addition (redemption), shares	(3,800,000)	6,621,807	262,500
ProShares Ultra Bloomberg Crude Oil [Member]
Addition, shares	34,050,000	24,600,000	68,500,000
Redemption, shares	47,050,000	18,550,000	86,352,616
Net addition (redemption), shares	(13,000,000)	6,050,000	(17,852,616)
ProShares Ultra Bloomberg Natural Gas [Member]
Addition, shares	8,250,000	1,600,000	2,510,000
Redemption, shares	3,450,000	2,960,284	1,030,000
Net addition (redemption), shares	4,800,000	(1,360,284)	1,480,000
ProShares Ultra Euro [Member]
Addition, shares	100,000	150,000	1,600,000
Redemption, shares	150,000	200,000	1,900,000
Net addition (redemption), shares	(50,000)	(50,000)	(300,000)
ProShares Ultra Gold [Member]
Addition, shares	900,000	550,000	650,000
Redemption, shares	900,000	650,000	1,100,000
Net addition (redemption), shares	0	(100,000)	(450,000)
ProShares Ultra Silver [Member]
Addition, shares	2,300,000	2,100,000	1,550,000
Redemption, shares	2,400,000	2,150,000	2,100,000
Net addition (redemption), shares	(100,000)	(50,000)	(550,000)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Addition, shares	83,750,000	38,280,000	17,117,000
Redemption, shares	44,750,000	43,274,536	10,084,629
Net addition (redemption), shares	39,000,000	(4,994,536)	7,032,371
ProShares Ultra Yen [Member]
Addition, shares	200,000	50,000	0
Redemption, shares	200,000	0	50,000
Net addition (redemption), shares	0	50,000	(50,000)
Proshares UltraPro 3X Crude Oil ETF [Member]
Addition, shares	15,150,000	7,250,000	1,750,008
Redemption, shares	18,550,000	850,008	1,450,000
Net addition (redemption), shares	(3,400,000)	6,399,992	300,008
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Addition, shares	20,600,000	2,637,500	575,002
Redemption, shares	12,400,000	2,762,596	75,000
Net addition (redemption), shares	8,200,000	(125,096)	500,002
ProShares UltraShort Australian Dollar [Member]
Addition, shares	50,000	100,000	100,000
Redemption, shares	150,000	200,000	100,000
Net addition (redemption), shares	(100,000)	(100,000)	0
ProShares UltraShort Bloomberg Crude Oil [Member]
Addition, shares	25,950,000	13,300,000	14,500,000
Redemption, shares	19,500,000	18,750,000	11,550,000
Net addition (redemption), shares	6,450,000	(5,450,000)	2,950,000
ProShares UltraShort Bloomberg Natural Gas [Member]
Addition, shares	1,200,000	2,500,000	650,000
Redemption, shares	1,700,000	1,850,000	650,000
Net addition (redemption), shares	(500,000)	650,000	0
ProShares UltraShort Euro [Member]
Addition, shares	1,050,000	1,700,000	2,400,000
Redemption, shares	2,900,000	4,900,000	5,750,000
Net addition (redemption), shares	(1,850,000)	(3,200,000)	(3,350,000)
ProShares UltraShort Gold [Member]
Addition, shares	600,000	250,000	350,000
Redemption, shares	450,001	450,000	600,000
Net addition (redemption), shares	149,999	(200,000)	(250,000)
ProShares UltraShort Silver [Member]
Addition, shares	1,000,000	800,000	850,000
Redemption, shares	800,000	950,000	1,000,000
Net addition (redemption), shares	200,000	(150,000)	(150,000)
ProShares UltraShort Yen [Member]
Addition, shares	450,000	100,000	1,000,000
Redemption, shares	700,000	1,100,000	2,700,000
Net addition (redemption), shares	(250,000)	(1,000,000)	(1,700,000)
ProShares VIX Mid-Term Futures ETF [Member]
Addition, shares	1,400,000	2,325,000	950,000
Redemption, shares	1,350,000	1,450,000	800,000
Net addition (redemption), shares	50,000	875,000	150,000
ProShares VIX Short-Term Futures ETF [Member]
Addition, shares	30,800,000	8,275,000	7,750,000
Redemption, shares	11,925,000	10,300,000	3,901,046
Net addition (redemption), shares	18,875,000	(2,025,000)	3,848,954

Statements of Cash Flows

Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Cash flow from operating activities
Net income (loss)		$ (423,738,003)	$ (1,532,383,201)		$ (458,458,134)	[1]
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(27,697,357,002)	(99,953,125,278)		(31,621,104,918)	[1]
Proceeds from sales or maturities of short-term U.S. government and agency obligations		27,425,344,455	101,639,196,463		32,238,762,028	[1]
Net amortization and accretion on short-term U.S. government and agency obligations		(27,697,111)	(25,444,619)		(24,840,586)	[1]
Net realized gain (loss) on investments		(81,302)	274,781		50,042	[1]
Change in unrealized appreciation (depreciation) on investments		(73,528,201)	79,078,100		5,135,182	[1]
Decrease (Increase) in securities sold receivable		(3,883)
Decrease (Increase) in receivable on futures contracts		(5,205,255)	(34,668,088)		(3,368,120)	[1]
Decrease (Increase) in receivable in Limitation by Sponsor			59,651		(59,651)	[1]
Decrease (Increase) in interest receivable		(423,564)	(555,187)
Cash paid for offering costs	[1]				(343,794)
Amortization of offering costs			105,643		238,151	[1]
Increase (Decrease) in payable to Sponsor		205,995	(968,109)		(213,033)	[1]
Increase (Decrease) in brokerage commissions and fees payable	[1]				(2,909)
Increase (Decrease) in payable on futures contracts		18,830,370	30,119,414		(2,017,981)	[1]
Increase (Decrease) in non-recurring fees and expenses payable		0
Net cash provided by (used in) operating activities		(783,653,501)	201,689,570		133,776,277	[1]
Cash flow from financing activities
Proceeds from addition of shares		5,180,423,903	6,196,623,015		9,097,496,596	[1]
Payment on shares redeemed		(4,305,253,454)	(5,783,407,073)		(8,967,195,585)	[1]
Net cash provided by (used in) financing activities		875,170,449	413,215,942		130,301,011	[1]
Net increase (decrease) in cash		91,516,948	614,905,512		264,077,288	[1]
Cash, beginning of period		1,098,678,257	483,772,745	[1]	219,695,457	[1]
Cash, end of period		1,190,195,205	1,098,678,257		483,772,745	[1]
ProShares Short Euro [Member]
Cash flow from operating activities
Net income (loss)		1,179,229	627,806		(1,499,567)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(411,178,062)	(371,708,641)		(52,920,382)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		411,237,264	378,200,000		59,163,769
Net amortization and accretion on short-term U.S. government and agency obligations		(204,360)	(94,195)		(75,559)
Net realized gain (loss) on investments		(1,186)			384
Change in unrealized appreciation (depreciation) on investments		(32)	(358)		381
Decrease (Increase) in interest receivable		5,207	(7,641)
Increase (Decrease) in payable to Sponsor		(5,130)	453		(6,149)
Increase (Decrease) in payable on futures contracts		(150)	(38,061)		(33,355)
Net cash provided by (used in) operating activities		1,032,780	6,979,363		4,629,522
Cash flow from financing activities
Proceeds from addition of shares		13,205,150
Payment on shares redeemed		(20,721,870)			(6,278,641)
Net cash provided by (used in) financing activities		(7,516,720)			(6,278,641)
Net increase (decrease) in cash		(6,483,940)	6,979,363		(1,649,119)
Cash, beginning of period		8,024,856	1,045,493		2,694,612
Cash, end of period		1,540,916	8,024,856		1,045,493
ProShares Short VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		151,537,761	(1,919,498,972)		919,321,029
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(5,155,156,465)	(23,270,517,650)		(7,250,717,757)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		5,100,473,064	23,768,116,025		6,931,640,345
Net amortization and accretion on short-term U.S. government and agency obligations		(2,240,594)	(2,894,979)		(5,493,799)
Net realized gain (loss) on investments		(2,755)	259,113		443
Change in unrealized appreciation (depreciation) on investments		(2,686)	(51,865)		56,560
Decrease (Increase) in receivable on futures contracts		3,248,564	(42,542,039)		(19,699,432)
Decrease (Increase) in interest receivable		19,008	(142,222)
Increase (Decrease) in payable to Sponsor		(85,383)	(530,173)		597,228
Increase (Decrease) in payable on futures contracts		(15,448,037)	14,919,287		203,750
Net cash provided by (used in) operating activities		82,342,477	(1,452,883,475)		575,908,367
Cash flow from financing activities
Proceeds from addition of shares		84,372,594	2,433,234,181		3,985,678,031
Payment on shares redeemed		(296,069,439)	(984,120,527)		(4,318,092,866)
Net cash provided by (used in) financing activities		(211,696,845)	1,449,113,654		(332,414,835)
Net increase (decrease) in cash		(129,354,368)	(3,769,821)		243,493,532
Cash, beginning of period		296,898,455	300,668,276		57,174,744
Cash, end of period		167,544,087	296,898,455		300,668,276
ProShares Ultra Bloomberg Crude Oil [Member]
Cash flow from operating activities
Net income (loss)		257,449,731	(136,181,929)		34,010,004
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(3,985,480,476)	(15,528,795,124)		(6,401,999,444)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		4,072,626,713	15,714,465,442		6,833,376,973
Net amortization and accretion on short-term U.S. government and agency obligations		(6,731,717)	(6,627,281)		(5,888,775)
Net realized gain (loss) on investments		(18,336)	2,307		14,496
Change in unrealized appreciation (depreciation) on investments		(94,590,462)	134,973,144		(6,848,935)
Decrease (Increase) in receivable on futures contracts		190,440	2,051,561		(2,242,001)
Decrease (Increase) in interest receivable		(60,707)	(62,514)
Increase (Decrease) in payable to Sponsor		(29,037)	(128,585)		(397,278)
Increase (Decrease) in brokerage commissions and fees payable					(2,332)
Increase (Decrease) in payable on futures contracts		(45,759)	311,815		(1,993,438)
Net cash provided by (used in) operating activities		243,310,390	180,008,836		448,029,270
Cash flow from financing activities
Proceeds from addition of shares		582,834,917	505,144,772		1,156,816,574
Payment on shares redeemed		(885,848,056)	(547,464,799)		(1,616,527,496)
Net cash provided by (used in) financing activities		(303,013,139)	(42,320,027)		(459,710,922)
Net increase (decrease) in cash		(59,702,749)	137,688,809		(11,681,652)
Cash, beginning of period		148,018,312	10,329,503		22,011,155
Cash, end of period		88,315,563	148,018,312		10,329,503
ProShares Ultra Bloomberg Natural Gas [Member]
Cash flow from operating activities
Net income (loss)		(24,545,216)	3,642,120		(36,341,452)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(409,196,437)	(1,789,009,201)		(400,640,972)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		390,337,650	1,831,997,907		386,173,028
Net amortization and accretion on short-term U.S. government and agency obligations		(289,445)	(405,867)		(313,279)
Net realized gain (loss) on investments		24	31		1,021
Change in unrealized appreciation (depreciation) on investments		(1,679)	(1,941)		2,494
Decrease (Increase) in receivable on futures contracts		(37,024)	1,520,156		(1,520,156)
Decrease (Increase) in interest receivable		917	(11,508)
Increase (Decrease) in payable to Sponsor		12,673	(19,992)		8,069
Increase (Decrease) in brokerage commissions and fees payable					(433)
Increase (Decrease) in payable on futures contracts		(3,309,741)	3,309,741		(1,528,005)
Net cash provided by (used in) operating activities		(47,028,278)	51,021,446		(54,159,685)
Cash flow from financing activities
Proceeds from addition of shares		118,073,066	51,682,061		105,678,154
Payment on shares redeemed		(60,456,328)	(110,389,802)		(45,385,784)
Net cash provided by (used in) financing activities		57,616,738	(58,707,741)		60,292,370
Net increase (decrease) in cash		10,588,460	(7,686,295)		6,132,685
Cash, beginning of period		7,030,602	14,716,897		8,584,212
Cash, end of period		17,619,062	7,030,602		14,716,897
ProShares Ultra Euro [Member]
Cash flow from operating activities
Net income (loss)		(611,889)	(1,238,854)		3,020,144
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(69,587,460)	(444,810,526)		(57,793,329)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		67,150,000	450,399,612		62,783,137
Net amortization and accretion on short-term U.S. government and agency obligations		(36,079)	(89,149)		(94,761)
Net realized gain (loss) on investments			(7)		87
Change in unrealized appreciation (depreciation) on investments		(52,274)	205,861		(837,700)
Decrease (Increase) in interest receivable		5,222	(6,718)
Increase (Decrease) in payable to Sponsor		(1,097)	(1,283)		(2,331)
Net cash provided by (used in) operating activities		(3,133,577)	4,458,936		7,075,247
Cash flow from financing activities
Proceeds from addition of shares		1,422,682	2,653,492		25,220,169
Payment on shares redeemed		(2,150,938)	(3,461,585)		(30,563,382)
Net cash provided by (used in) financing activities		(728,256)	(808,093)		(5,343,213)
Net increase (decrease) in cash		(3,861,833)	3,650,843		1,732,034
Cash, beginning of period		5,989,270	2,338,427		606,393
Cash, end of period		2,127,437	5,989,270		2,338,427
ProShares Ultra Gold [Member]
Cash flow from operating activities
Net income (loss)		24,306,966	(6,039,361)		19,445,233
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(909,144,427)	(4,562,780,642)		(909,157,323)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		886,380,072	4,611,119,917		916,390,856
Net amortization and accretion on short-term U.S. government and agency obligations		(1,468,620)	(1,390,287)		(766,506)
Net realized gain (loss) on investments		(402)	172		(691)
Change in unrealized appreciation (depreciation) on investments		(1,639,846)	(612,996)		(8,072,021)
Decrease (Increase) in receivable on futures contracts		(170,073)	2,420		(2,420)
Decrease (Increase) in interest receivable		(30,618)	(15,303)
Increase (Decrease) in payable to Sponsor		20,500	(6,331)		(1,811)
Increase (Decrease) in payable on futures contracts		(7,990)	7,990		(1,280)
Net cash provided by (used in) operating activities		(1,754,438)	40,285,579		17,834,037
Cash flow from financing activities
Proceeds from addition of shares		38,466,355	20,994,687		23,949,465
Payment on shares redeemed		(39,283,237)	(21,428,126)		(41,813,150)
Net cash provided by (used in) financing activities		(816,882)	(433,439)		(17,863,685)
Net increase (decrease) in cash		(2,571,320)	39,852,140		(29,648)
Cash, beginning of period		41,098,043	1,245,903		1,275,551
Cash, end of period		38,526,723	41,098,043		1,245,903
ProShares Ultra Silver [Member]
Cash flow from operating activities
Net income (loss)		40,453,514	(51,089,365)		10,539,992
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(1,737,254,759)	(7,425,415,370)		(2,227,503,877)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,728,644,437	7,540,649,737		2,289,337,181
Net amortization and accretion on short-term U.S. government and agency obligations		(3,125,767)	(3,423,994)		(2,142,126)
Net realized gain (loss) on investments		(7,099)	1,203		(207)
Change in unrealized appreciation (depreciation) on investments		1,160,712	(4,592,049)		(42,683,411)
Decrease (Increase) in receivable on futures contracts			2,220		(2,220)
Decrease (Increase) in interest receivable		(75,414)	(16,306)
Increase (Decrease) in payable to Sponsor		26,984	(37,038)		(34,624)
Increase (Decrease) in payable on futures contracts		351,360	47,576		(2,290)
Net cash provided by (used in) operating activities		30,173,968	56,126,614		27,508,418
Cash flow from financing activities
Proceeds from addition of shares		62,741,459	56,650,169		50,514,699
Payment on shares redeemed		(65,764,507)	(65,335,975)		(75,235,084)
Net cash provided by (used in) financing activities		(3,023,048)	(8,685,806)		(24,720,385)
Net increase (decrease) in cash		27,150,920	47,440,808		2,788,033
Cash, beginning of period		51,907,742	4,466,934		1,678,901
Cash, end of period		79,058,662	51,907,742		4,466,934
ProShares Ultra VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		(690,511,840)	452,499,741		(1,052,171,730)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(5,261,759,239)	(15,074,656,207)		(4,416,383,420)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		5,085,520,200	15,363,705,730		4,566,387,313
Net amortization and accretion on short-term U.S. government and agency obligations		(3,478,902)	(1,510,857)		(2,896,165)
Net realized gain (loss) on investments		(18,591)	7,731		21,942
Change in unrealized appreciation (depreciation) on investments		(1,133,895)	1,317,684		8,993
Decrease (Increase) in receivable on futures contracts		(9,259,562)	6,171,434		18,388,740
Decrease (Increase) in interest receivable		(106,359)	(106,307)
Increase (Decrease) in payable to Sponsor		208,827	(141,390)		(79,981)
Increase (Decrease) in payable on futures contracts		27,274,674	6,745,146
Net cash provided by (used in) operating activities		(853,264,687)	754,032,705		(886,724,308)
Cash flow from financing activities
Proceeds from addition of shares		2,462,322,146	2,220,909,974		2,602,472,951
Payment on shares redeemed		(1,450,416,725)	(2,860,773,004)		(1,709,331,303)
Net cash provided by (used in) financing activities		1,011,905,421	(639,863,030)		893,141,648
Net increase (decrease) in cash		158,640,734	114,169,675		6,417,340
Cash, beginning of period		202,920,595	88,750,920		82,333,580
Cash, end of period		361,561,329	202,920,595		88,750,920
ProShares Ultra Yen [Member]
Cash flow from operating activities
Net income (loss)		(91,062)	40,871		239,034
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(42,675,552)	(41,486,414)		(16,968,159)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		40,888,736	43,500,000		20,281,603
Net amortization and accretion on short-term U.S. government and agency obligations		(21,376)	(15,370)		(28,639)
Net realized gain (loss) on investments		162			83
Change in unrealized appreciation (depreciation) on investments		187,566	(212,218)		(307,194)
Decrease (Increase) in interest receivable		(785)	(3,941)
Increase (Decrease) in payable to Sponsor		2,032	131		(2,225)
Net cash provided by (used in) operating activities		(1,710,279)	1,823,059		3,214,503
Cash flow from financing activities
Proceeds from addition of shares		14,168,881
Payment on shares redeemed		(11,401,995)			(2,915,722)
Net cash provided by (used in) financing activities		2,766,886			(2,915,722)
Net increase (decrease) in cash		1,056,607	1,823,059		298,781
Cash, beginning of period		2,726,531	903,472		604,691
Cash, end of period		3,783,138	2,726,531		903,472
Proshares UltraPro 3X Crude Oil ETF [Member]
Cash flow from operating activities
Net income (loss)		100,627,763	(62,342,439)		7,317,098
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(1,874,262,579)	(2,621,719,773)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,849,526,465	2,601,000,000
Net amortization and accretion on short-term U.S. government and agency obligations		(1,468,282)	(259,227)
Net realized gain (loss) on investments		(7,318)
Change in unrealized appreciation (depreciation) on investments		(1,520)	(876)
Decrease (Increase) in receivable on futures contracts		551,842	(262,447)		(289,395)
Decrease (Increase) in receivable in Limitation by Sponsor			24,342		(24,342)
Decrease (Increase) in interest receivable		(8,234)	(17,308)
Cash paid for offering costs					(171,927)
Amortization of offering costs			52,846		119,081
Increase (Decrease) in payable to Sponsor		3,414	61,498
Increase (Decrease) in payable on futures contracts		2,075,764
Net cash provided by (used in) operating activities		77,037,315	(83,463,384)		6,950,515
Cash flow from financing activities
Proceeds from addition of shares		253,905,784	183,406,337		40,659,738
Payment on shares redeemed		(368,744,112)	(47,329,487)		(36,641,353)
Net cash provided by (used in) financing activities		(114,838,328)	136,076,850		4,018,385
Net increase (decrease) in cash		(37,801,013)	52,613,466		10,968,900
Cash, beginning of period		63,582,366	10,968,900
Cash, end of period		25,781,353	63,582,366		10,968,900
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Cash flow from operating activities
Net income (loss)		(17,675,718)	17,276,220		(10,145,373)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(450,571,483)	(1,258,898,672)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		393,485,809	1,259,000,000
Net amortization and accretion on short-term U.S. government and agency obligations		(280,492)	(101,328)
Net realized gain (loss) on investments		(6,030)
Change in unrealized appreciation (depreciation) on investments		(2,936)
Decrease (Increase) in securities sold receivable		(3,883)
Decrease (Increase) in receivable on futures contracts		(2,120,078)
Decrease (Increase) in receivable in Limitation by Sponsor			35,309		(35,309)
Decrease (Increase) in interest receivable		(6,943)	(13,748)
Cash paid for offering costs					(171,867)
Amortization of offering costs			52,797		119,070
Increase (Decrease) in payable to Sponsor		55,624	18,496
Increase (Decrease) in payable on futures contracts		(89,382)	(437,716)		527,098
Net cash provided by (used in) operating activities		(77,215,512)	16,931,358		(9,706,381)
Cash flow from financing activities
Proceeds from addition of shares		304,935,397	62,030,238		38,429,372
Payment on shares redeemed		(214,535,631)	(81,802,535)		(7,122,823)
Net cash provided by (used in) financing activities		90,399,766	(19,772,297)		31,306,549
Net increase (decrease) in cash		13,184,254	(2,840,939)		21,600,168
Cash, beginning of period		18,759,229	21,600,168
Cash, end of period		31,943,483	18,759,229		21,600,168
ProShares UltraShort Australian Dollar [Member]
Cash flow from operating activities
Net income (loss)		177,916	1,570,978		(2,990,001)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(132,612,765)	(304,025,708)		(88,399,815)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		129,028,715	315,798,003		89,408,839
Net amortization and accretion on short-term U.S. government and agency obligations		(47,642)	(87,192)		(84,205)
Net realized gain (loss) on investments		(28)	247		178
Change in unrealized appreciation (depreciation) on investments		(217)	(983)		718
Decrease (Increase) in receivable on futures contracts		6,300	(6,300)
Decrease (Increase) in interest receivable		6,768	(8,475)
Increase (Decrease) in payable to Sponsor		(3,643)	(2,889)		(1,706)
Increase (Decrease) in payable on futures contracts		37,725	(52,950)		20,610
Net cash provided by (used in) operating activities		(3,406,871)	13,184,731		(2,045,382)
Cash flow from financing activities
Proceeds from addition of shares		3,004,977	5,028,505		4,801,797
Payment on shares redeemed		(8,634,614)	(9,241,252)		(4,723,167)
Net cash provided by (used in) financing activities		(5,629,637)	(4,212,747)		78,630
Net increase (decrease) in cash		(9,036,508)	8,971,984		(1,966,752)
Cash, beginning of period		10,754,381	1,782,397		3,749,149
Cash, end of period		1,717,873	10,754,381		1,782,397
ProShares UltraShort Bloomberg Crude Oil [Member]
Cash flow from operating activities
Net income (loss)		(44,606,403)	17,510,057		(27,805,142)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(1,412,477,845)	(6,792,763,547)		(2,520,968,339)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,379,275,846	7,020,979,617		2,474,635,036
Net amortization and accretion on short-term U.S. government and agency obligations		(1,022,751)	(2,513,939)		(1,641,472)
Net realized gain (loss) on investments		(4,244)	(103)		448
Change in unrealized appreciation (depreciation) on investments		24,677,902	(51,276,607)		18,422,150
Decrease (Increase) in receivable on futures contracts		(711,777)	(432,627)
Decrease (Increase) in interest receivable		(17,737)	(36,428)
Increase (Decrease) in payable to Sponsor		10	(102,279)		27,810
Increase (Decrease) in payable on futures contracts		(48,600)	(645,187)		680,185
Net cash provided by (used in) operating activities		(54,935,599)	190,718,957		(56,649,324)
Cash flow from financing activities
Proceeds from addition of shares		418,888,295	221,565,466		510,910,744
Payment on shares redeemed		(342,015,652)	(376,000,381)		(458,220,621)
Net cash provided by (used in) financing activities		76,872,643	(154,434,915)		52,690,123
Net increase (decrease) in cash		21,937,044	36,284,042		(3,959,201)
Cash, beginning of period		39,972,133	3,688,091		7,647,292
Cash, end of period		61,909,177	39,972,133		3,688,091
ProShares UltraShort Bloomberg Natural Gas [Member]
Cash flow from operating activities
Net income (loss)		9,150,598	(2,217,465)		4,092,401
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(202,154,543)	(695,820,495)		(98,949,414)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		197,350,000	699,600,000		97,881,796
Net amortization and accretion on short-term U.S. government and agency obligations		(50,345)	(79,553)		(33,644)
Net realized gain (loss) on investments					783
Change in unrealized appreciation (depreciation) on investments		(274)	85		(121)
Decrease (Increase) in receivable on futures contracts		3,096,239	(3,096,239)		105,872
Decrease (Increase) in interest receivable		4,857	(11,379)
Increase (Decrease) in payable to Sponsor		(6,665)	13,415		(261)
Increase (Decrease) in brokerage commissions and fees payable					(144)
Increase (Decrease) in payable on futures contracts		6,826	(104,104)		104,104
Net cash provided by (used in) operating activities		7,396,693	(1,715,735)		3,201,372
Cash flow from financing activities
Proceeds from addition of shares		30,089,484	53,822,972		23,216,158
Payment on shares redeemed		(48,871,508)	(36,361,221)		(24,444,610)
Net cash provided by (used in) financing activities		(18,782,024)	17,461,751		(1,228,452)
Net increase (decrease) in cash		(11,385,331)	15,746,016		1,972,920
Cash, beginning of period		18,756,222	3,010,206		1,037,286
Cash, end of period		7,370,891	18,756,222		3,010,206
ProShares UltraShort Euro [Member]
Cash flow from operating activities
Net income (loss)		14,522,601	25,147,085		(62,619,643)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(1,454,451,994)	(5,771,042,956)		(2,213,830,667)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,500,077,958	5,856,785,001		2,348,460,695
Net amortization and accretion on short-term U.S. government and agency obligations		(2,411,291)	(2,752,893)		(2,048,455)
Net realized gain (loss) on investments		(1,909)	219		3,785
Change in unrealized appreciation (depreciation) on investments		753,437	(4,869,355)		22,527,463
Decrease (Increase) in interest receivable		(44,724)	(15,999)
Increase (Decrease) in payable to Sponsor		(29,188)	(42,899)		(119,503)
Net cash provided by (used in) operating activities		58,414,890	103,208,203		92,373,675
Cash flow from financing activities
Proceeds from addition of shares		27,861,560	37,244,830		54,352,755
Payment on shares redeemed		(78,350,167)	(108,392,933)		(145,349,037)
Net cash provided by (used in) financing activities		(50,488,607)	(71,148,103)		(90,996,282)
Net increase (decrease) in cash		7,926,283	32,060,100		1,377,393
Cash, beginning of period		36,353,995	4,293,895		2,916,502
Cash, end of period		44,280,278	36,353,995		4,293,895
ProShares UltraShort Gold [Member]
Cash flow from operating activities
Net income (loss)		(5,546,845)	1,967,739		(11,603,901)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(348,134,747)	(1,471,021,129)		(259,713,980)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		339,976,425	1,499,398,357		288,557,288
Net amortization and accretion on short-term U.S. government and agency obligations		(205,793)	(387,225)		(283,867)
Net realized gain (loss) on investments		(692)	(152)		1,208
Change in unrealized appreciation (depreciation) on investments		181,201	(498,987)		4,523,831
Decrease (Increase) in receivable on futures contracts		1,700	(1,700)		1,280
Decrease (Increase) in interest receivable		(1,191)	(10,500)
Increase (Decrease) in payable to Sponsor		1,906	(9,944)		(30,538)
Increase (Decrease) in payable on futures contracts		25,211	(2,420)		2,420
Net cash provided by (used in) operating activities		(13,702,825)	29,434,039		21,453,741
Cash flow from financing activities
Proceeds from addition of shares		39,522,691	16,527,151		26,178,336
Payment on shares redeemed		(31,027,283)	(31,893,303)		(46,730,672)
Net cash provided by (used in) financing activities		8,495,408	(15,366,152)		(20,552,336)
Net increase (decrease) in cash		(5,207,417)	14,067,887		901,405
Cash, beginning of period		15,103,332	1,035,445		134,040
Cash, end of period		9,895,915	15,103,332		1,035,445
ProShares UltraShort Silver [Member]
Cash flow from operating activities
Net income (loss)		(4,610,061)	5,018,226		(2,017,008)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(259,643,345)	(906,025,439)		(205,796,774)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		253,938,061	921,367,007		209,150,487
Net amortization and accretion on short-term U.S. government and agency obligations		(161,864)	(285,580)		(157,687)
Net realized gain (loss) on investments		(226)	2,031		932
Change in unrealized appreciation (depreciation) on investments		160,166	73,924		3,103,909
Decrease (Increase) in receivable on futures contracts		(4,800)			2,290
Decrease (Increase) in interest receivable		3,521	(7,847)
Increase (Decrease) in payable to Sponsor		507	(5,971)		(2,464)
Increase (Decrease) in payable on futures contracts		12,796	3,500		2,220
Net cash provided by (used in) operating activities		(10,305,245)	20,139,851		4,285,905
Cash flow from financing activities
Proceeds from addition of shares		35,269,175	27,656,086		26,717,920
Payment on shares redeemed		(28,593,814)	(38,883,485)		(29,740,532)
Net cash provided by (used in) financing activities		6,675,361	(11,227,399)		(3,022,612)
Net increase (decrease) in cash		(3,629,884)	8,912,452		1,263,293
Cash, beginning of period		10,276,096	1,363,644		100,351
Cash, end of period		6,646,212	10,276,096		1,363,644
ProShares UltraShort Yen [Member]
Cash flow from operating activities
Net income (loss)		1,796,316	(1,920,781)		(24,316,599)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(669,716,446)	(3,738,985,179)		(1,735,928,862)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		679,904,665	3,837,199,781		1,862,630,186
Net amortization and accretion on short-term U.S. government and agency obligations		(779,474)	(1,320,754)		(1,446,842)
Net realized gain (loss) on investments		539	(3)		4,001
Change in unrealized appreciation (depreciation) on investments		(3,220,521)	4,640,285		15,227,152
Decrease (Increase) in interest receivable		(4,357)	(14,973)
Increase (Decrease) in payable to Sponsor		(16,193)	(57,826)		(125,628)
Net cash provided by (used in) operating activities		7,964,529	99,540,550		116,043,408
Cash flow from financing activities
Proceeds from addition of shares		34,403,213	7,078,646		76,657,434
Payment on shares redeemed		(53,430,884)	(84,631,626)		(194,285,146)
Net cash provided by (used in) financing activities		(19,027,671)	(77,552,980)		(117,627,712)
Net increase (decrease) in cash		(11,063,142)	21,987,570		(1,584,304)
Cash, beginning of period		23,570,254	1,582,684		3,166,988
Cash, end of period		12,507,112	23,570,254		1,582,684
ProShares VIX Mid-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		(11,773,312)	10,422,181		(26,328,548)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(1,178,141,659)	(2,159,804,178)		(943,753,668)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,164,579,598	2,181,000,000		968,489,510
Net amortization and accretion on short-term U.S. government and agency obligations		(417,440)	(202,494)		(243,058)
Net realized gain (loss) on investments		(8)			377
Change in unrealized appreciation (depreciation) on investments		(1,050)	187		(441)
Decrease (Increase) in receivable on futures contracts			170,015		72,526
Decrease (Increase) in interest receivable		(5,423)	(29,104)
Increase (Decrease) in payable to Sponsor		(2,802)	8,449		(8,941)
Increase (Decrease) in payable on futures contracts		564,382	565,495
Net cash provided by (used in) operating activities		(25,197,714)	32,130,551		(1,772,243)
Cash flow from financing activities
Proceeds from addition of shares		31,405,087	56,218,143		26,311,779
Payment on shares redeemed		(30,619,144)	(37,072,628)		(20,480,908)
Net cash provided by (used in) financing activities		785,943	19,145,515		5,830,871
Net increase (decrease) in cash		(24,411,771)	51,276,066		4,058,628
Cash, beginning of period		57,542,424	6,266,358		2,207,730
Cash, end of period		33,130,653	57,542,424		6,266,358
ProShares VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		(224,968,052)	112,422,941		(198,604,105)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations		(1,733,756,719)	(5,723,838,427)		(1,819,678,736)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,754,942,777	5,744,914,327		1,834,013,986
Net amortization and accretion on short-term U.S. government and agency obligations		(3,254,877)	(1,002,455)		(1,201,747)
Net realized gain (loss) on investments		(13,203)	1,992		772
Change in unrealized appreciation (depreciation) on investments		(1,793)	(14,835)		11,354
Decrease (Increase) in receivable on futures contracts		2,974	1,755,458		1,816,796
Decrease (Increase) in interest receivable		(106,572)	(16,966)
Increase (Decrease) in payable to Sponsor		52,656	16,049		(32,700)
Increase (Decrease) in payable on futures contracts		7,431,291	5,489,302
Net cash provided by (used in) operating activities		(199,671,518)	139,727,386		(183,674,380)
Cash flow from financing activities
Proceeds from addition of shares		623,530,990	234,775,305		318,930,520
Payment on shares redeemed		(268,317,550)	(338,824,404)		(153,313,288)
Net cash provided by (used in) financing activities		355,213,440	(104,049,099)		165,617,232
Net increase (decrease) in cash		155,541,922	35,678,287		(18,057,148)
Cash, beginning of period		39,393,419	3,715,132		21,772,280
Cash, end of period		$ 194,935,341	$ 39,393,419		$ 3,715,132
[1]	The operations include the activity of ProShares UltraPro 3x Crude Oil ETF and ProShares UltraPro 3x Short Crude Oil ETF since January 13, 2017 (inception date).

Organization

Organization	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	NOTE 1 - ORGANIZATION ProShares Trust II (the “Trust”) is a Delaware statutory trust formed on October 9, 2007 and is currently organized into separate series (each, a “Fund” and collectively, the “Funds”). As of December 31, 2019, the following twenty Mid-Term 10-K. “VIX Funds” in these Notes to Financial Statements. The Trust had no operations prior to November 24, 2008, other than matters relating to its organization, the registration of each series under the Securities Act of 1933, as amended, and the sale and issuance to ProShare Capital Management LLC (the “Sponsor”) of fourteen 350 Groups of Funds are collectively referred to in several different ways. References to “Short Funds,” “UltraShort Funds,” “UltraPro Short Funds,” “Ultra Funds” or “UltraPro Funds” refer to the different Funds based upon their investment objectives, but without distinguishing among the Funds’ benchmarks. References to “Commodity Index Funds,” “Commodity Funds” and “Currency Funds” refer to the different Funds according to their general benchmark categories without distinguishing among the Funds’ investment objectives or Fund-specific benchmarks. References to “VIX Funds” refer to the different Funds based upon their investment objective and their general benchmark categories. Each “Short” Fund seeks daily investment results, before fees and expenses, that correspond to either one-half (-0.5x) (-1x) (-2x) (-3x) one-half The Geared Funds do not seek to achieve their stated investment objectives over a period of time greater than a single day because mathematical compounding prevents the Geared Funds from achieving such results. Accordingly, results over periods of time greater than a single day -0.5x, -1x, -2x, -3x, Share Splits and Reverse Share Splits The table below includes Share splits and reverse Share splits for the Funds during the years ended December 31, 2017, 2018, and 2019. There were no Share splits or reverse Share splits for the Funds during the year ended December 31, 2019. The ticker symbols for these Funds did not change, and each Fund continues to trade on the NYSE Arca. Fund Execution Date Type of Split Date Trading ProShares UltraShort Bloomberg Crude Oil January 11, 2017 2-for-1 Share split January 12, 2017 ProShares Ultra Bloomberg Crude Oil January 11, 2017 1-for-2 reverse Share split January 12, 2017 ProShares Ultra VIX Short-Term Futures ETF January 11, 2017 1-for-5 reverse Share split January 12, 2017 ProShares Short VIX Short-Term Futures ETF July 12, 2017 2-for-1 Share split July 17, 2017 ProShares VIX Short-Term Futures ETF July 14, 2017 1-for-4 reverse Share split July 17, 2017 ProShares Ultra VIX Short-Term Futures ETF July 14, 2017 1-for-4 reverse Share split July 17, 2017 ProShares Ultra Bloomberg Natural Gas March 19, 2018 1-for-5 reverse Share split March 20, 2018 ProShares UltraPro 3x Short Crude Oil ETF March 19, 2018 1-for-4 reverse Share split March 20, 2018 ProShares Short VIX Short-Term Futures ETF September 17, 2018 1-for-4 reverse Share split September 18, 2018 ProShares Ultra VIX Short-Term Futures ETF September 17, 2018 1-for-5 reverse Share split September 18, 2018 The reverse splits were applied retroactively for all periods presented, reducing the number of Shares outstanding for each of the Funds, and resulted in a proportionate increase in the price per Share and per Share information of each such Fund. Therefore, the reverse splits did not change the aggregate net asset value of a shareholder’s investment at the time of the reverse split. The splits were applied retroactively for all periods presented, increasing the number of Shares outstanding for each of the Funds, and resulted in a proportionate decrease in the price per Share and per Share information of each such Fund. Therefore, the splits did not change the aggregate net asset value of a shareholder’s investment at the time of the split.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Significant Accounting Policies	NOTE 2 – SIGNIFICANT ACCOUNTING POLICIES Each Fund is an investment company, as defined by Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 946 “Financial Services — Investment Companies.” As such, the Funds follow the investment company accounting and reporting guidance. The following is a summary of significant accounting policies followed by each Fund, as applicable, in preparation of its financial statements. These policies are in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Certain prior year amounts have been reclassified to conform to the current year presentation. Use of Estimates & Indemnifications The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the normal course of business, the Trust enters into contracts that contain a variety of representations which provide general indemnifications. The Trust’s maximum exposure under these arrangements cannot be known; however, the Trust expects any risk of loss to be remote. Basis of Presentation Pursuant to rules and regulations of the SEC, these financial statements are presented for the Trust as a whole, as the SEC registrant, and for each Fund individually. The debts, liabilities, obligations and expenses incurred, contracted for or otherwise existing with respect to a particular Fund shall be enforceable only against the assets of such Fund and not against the assets of the Trust generally or any other Fund. Accordingly, the assets of each Fund of the Trust include only those funds and other assets that are paid to, held by or distributed to the Trust for the purchase of Shares in that Fund. Statement of Cash Flows The cash amount shown in the Statements of Cash Flows is the amount reported as cash in the Statement of Financial Condition dated December 31, 2019 and 2018, and represents cash, segregated cash balances with brokers for futures contracts, segregated cash with brokers for swap agreements, segregated cash with brokers for forward agreements, and segregated cash with brokers for foreign currency forward agreements but does not include short-term investments. Final Net Asset Value for Fiscal Period The cut-off Fund Create/Redeem Cut-off* NAV Calculation NAV ProShares UltraShort Silver, ProShares Ultra Silver 1:00 p.m. 1:25 p.m. December 31, 2019 ProShares UltraShort Gold, ProShares Ultra Gold 1:00 p.m. 1:30 p.m. December 31, 2019 ProShares UltraShort Bloomberg Crude Oil, ProShares Ultra Bloomberg Crude Oil, 2:00 p.m. 2:30 p.m. December 31, 2019 ProShares UltraPro 3x Short Crude Oil ETF, ProShares UltraPro 3x Crude Oil ETF ProShares UltraShort Bloomberg Natural Gas, ProShares Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 31, 2019 ProShares UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares Short Euro ProShares UltraShort Euro, ProShares Ultra Euro 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares UltraShort Yen, ProShares Ultra Yen 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares VIX Short-Term Futures ETF, ProShares Ultra VIX Short-Term Futures ETF, ProShares Short VIX Short-Term Futures ETF 2:00 p.m. 4:15 p.m. December 31, 2019 ProShares VIX Mid-Term 2:00 p.m. 4:15 p.m. December 31, 2019 * Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the twelve months ended December 31, 2019. Market value per Share is determined at the close of the NYSE Arca and may be later than when the Funds’ NAV per Share is calculated. For financial reporting purposes, the Funds value transactions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements may differ from those used in the calculation of certain of the Funds’ final creation/redemption NAV for the year ended December 31, 2019. Investment Valuation Short-term investments are valued at amortized cost which approximates fair value for daily NAV purposes. For financial reporting purposes, short-term investments are valued at their market price using information provided by a third-party pricing service or market quotations. In each of these situations, valuations are typically categorized as Level I in the fair value hierarchy. Derivatives (e.g., futures contracts, swap agreements, forward agreements and foreign currency forward contracts) are generally valued using independent sources and/or agreements with counterparties or other procedures as determined by the Sponsor. Futures contracts, except for those entered into by the Gold, Silver, Australian Dollar and Short Euro Funds, are generally valued at the last settled price on the applicable exchange on which that future trades. Futures contracts entered into by the Gold, Silver, Australian Dollar and Short Euro Funds are generally valued at the last sales price prior to the time at which the NAV per Share of a Fund is determined. For financial reporting purposes, all futures contracts are generally valued at the last settled price. Futures contracts valuations are typically categorized as Level I in the fair value hierarchy. Swap agreements, forward agreements and foreign currency forward contracts valuations are typically categorized as Level II in the fair value hierarchy. The Sponsor may in its sole discretion choose to determine a fair value price as the basis for determining the market value of such position. Such fair value prices would generally be determined based on available inputs about the current value of the underlying financial instrument or commodity and would be based on principles that the Sponsor deems fair and equitable so long as such principles are consistent with industry standards. The Sponsor may fair value an asset of a Fund pursuant to the policies the Sponsor has adopted. Depending on the source and relevant significance of valuation inputs, these instruments may be classified as Level II or Level III in the fair value hierarchy. Fair value pricing may require subjective determinations about the value of an investment. While the Funds’ policies are intended to result in a calculation of its respective Fund’s NAV that fairly reflects investment values as of the time of pricing, such Fund cannot ensure that fair values determined by the Sponsor or persons acting at their direction would accurately reflect the price that a Fund could obtain for an investment if it were to dispose of that investment as of the time of pricing (for instance, in a forced or distressed sale). The prices used by such Fund may differ from the value that would be realized if the investments were sold and the differences could be material to the financial statements. Fair Value of Financial Instruments The Funds disclose the fair value of their investments in a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Funds (observable inputs); and (2) the Funds’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements hierarchy are as follows: Level I – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level II – Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market-corroborated inputs). Level III – Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. In some instances, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest input level that is significant to the fair value measurement in its entirety. Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. The following table summarizes the valuation of investments at December 31, 2019 using the fair value hierarchy: Level I - Quoted Prices Level II - Fund Short-Term Futures * Foreign Swap Total ProShares Short Euro $ 745,805 $ (14,000 ) $ — $ — $ 731,805 ProShares Short VIX Short-Term Futures ETF 56,929,436 10,254,872 — — 67,184,308 ProShares Ultra Bloomberg Crude Oil 200,115,463 765,575 — 21,814,590 222,695,628 ProShares Ultra Bloomberg Natural Gas 27,530,314 (2,652,228 ) — — 24,878,086 ProShares Ultra Euro 3,970,412 — 109,997 — 4,080,409 ProShares Ultra Gold 66,177,998 2,248,514 — 5,890,260 74,316,772 ProShares Ultra Silver 135,544,101 5,724,549 — 25,135,898 166,404,548 ProShares Ultra VIX Short-Term Futures ETF 179,749,262 (46,396,781 ) — (209,784 ) 133,142,697 ProShares Ultra Yen 1,808,104 — (10,529 ) — 1,797,575 ProShares UltraPro 3x Crude Oil ETF 47,193,110 7,266,550 — — 54,459,660 ProShares UltraPro 3x Short Crude Oil ETF 57,375,132 (8,358,056 ) — — 49,017,076 ProShares UltraShort Australian Dollar 3,931,474 (224,000 ) — — 3,707,474 ProShares UltraShort Bloomberg Crude Oil 62,199,283 (3,118,689 ) — (4,033,931 ) 55,046,663 ProShares UltraShort Bloomberg Natural Gas 5,154,876 672,329 — — 5,827,205 ProShares UltraShort Euro 78,590,100 — (2,250,420 ) — 76,339,680 ProShares UltraShort Gold 12,355,192 (391,570 ) — (1,172,809 ) 10,790,813 ProShares UltraShort Silver 9,162,867 (82,181 ) — (1,953,904 ) 7,126,782 ProShares UltraShort Yen 25,542,823 — 95,899 — 25,638,722 ProShares VIX Mid-Term 13,980,559 (2,280,825 ) — — 11,699,734 ProShares VIX Short-Term Futures ETF 96,868,817 (15,394,011 ) — — 81,474,806 Total Trust $ 1,084,925,128 $ (51,979,952 ) $ (2,055,053 ) $ 45,470,320 $ 1,076,360,443 * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. The following table summarizes the valuation of investments at December 31, 2018 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Fund Short-Term Futures * Forward Foreign Swap Total ProShares Short Euro $ 599,429 $ (43,281 ) $ — $ — $ — $ 556,148 ProShares Short VIX Short-Term Futures ETF — (14,476,201 ) — — — (14,476,201 ) ProShares Ultra Bloomberg Crude Oil 280,502,900 (14,040,301 ) — — (72,767,125 ) 193,695,474 ProShares Ultra Bloomberg Natural Gas 8,380,427 (10,323,163 ) — — — (1,942,736 ) ProShares Ultra Euro 1,496,658 — — 57,938 — 1,554,596 ProShares Ultra Gold 41,941,734 72,670 4,253,301 — — 46,267,705 ProShares Ultra Silver 123,795,806 340,736 26,301,717 — — 150,438,259 ProShares Ultra VIX Short-Term Futures ETF — 32,503,965 — — (1,330,949 ) 31,173,016 ProShares Ultra Yen — — — 177,111 — 177,111 ProShares UltraPro 3x Crude Oil ETF 20,979,876 (23,451,361 ) — — — (2,471,485 ) ProShares UltraPro 3x Short Crude Oil ETF — 7,019,475 — — — 7,019,475 ProShares UltraShort Australian Dollar 299,537 511,825 — — — 811,362 ProShares UltraShort Bloomberg Crude Oil 27,967,534 3,272,155 — — 20,646,726 51,886,415 ProShares UltraShort Bloomberg Natural Gas 299,714 10,837,989 — — — 11,137,703 ProShares UltraShort Euro 121,801,685 — — (1,495,804 ) — 120,305,881 ProShares UltraShort Gold 3,989,563 (31,780 ) (990,786 ) — — 2,966,997 ProShares UltraShort Silver 3,294,766 (44,917 ) (1,793,011 ) — — 1,456,838 ProShares UltraShort Yen 34,951,229 — — (3,123,744 ) — 31,827,485 ProShares VIX Mid-Term — 3,758,106 — — — 3,758,106 ProShares VIX Short-Term Futures ETF 114,785,002 17,378,445 — — — 132,163,447 Total Trust $ 785,085,860 $ 13,284,362 $ 27,771,221 $ (4,384,499 ) $ (53,451,348 ) $ 768,305,596 * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. Investment Transactions and Related Income Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized appreciation (depreciation) on open contracts are reflected in the Statements of Financial Condition and changes in the unrealized appreciation (depreciation) between periods are reflected in the Statements of Operations. Interest income is recognized on an accrual basis and includes, where applicable, the amortization of premium or discount, and is reflected as Interest Income in the Statement of Operations. Brokerage Commissions and Fees Each Fund pays its respective brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up Federal Income Tax Each Fund is registered as a series of a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, no Fund expects to incur U.S. federal income tax liability; rather, each beneficial owner of a Fund’s Shares is required to take into account its allocable share of its Fund’s income, gain, loss, deductions and other items for its Fund’s taxable year ending with or within the beneficial owner’s taxable year. Management of the Funds has reviewed all open tax years and major jurisdictions (i.e., the last four tax year ends and the interim tax period since then, as applicable) and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Funds are also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management monitors its tax positions taken under the interpretation to determine if adjustments to conclusions are necessary based on factors including, but not limited to, on-going

Investments

Investments	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Investments	NOTE 3 – INVESTMENTS Short-Term Investments The Funds may purchase U.S. Treasury Bills, agency securities, and other high-credit quality short-term fixed income or similar securities with original maturities of one year or less. A portion of these investments may be posted as collateral in connection with swap agreements, futures, and/or forward contracts. Accounting for Derivative Instruments In seeking to achieve each Fund’s investment objective, the Sponsor uses a mathematical approach to investing. Using this approach, the Sponsor determines the type, quantity and mix of investment positions, including derivative positions, which the Sponsor believes in combination, should produce returns consistent with a Fund’s objective. All open derivative positions at period end are reflected on each respective Fund’s Schedule of Investments. Certain Funds utilized a varying level of derivative instruments in conjunction with investment securities in seeking to meet their investment objectives during the period. While the volume of open positions may vary on a daily basis as each Fund transacts derivatives contracts in order to achieve the appropriate exposure to meet its investment objective, the volume of these open positions relative to the net assets of each respective Fund at the date of this report is generally representative of open positions throughout the reporting period. Following is a description of the derivative instruments used by the Funds during the reporting period, including the primary underlying risk exposures related to each instrument type. Futures Contracts The Funds may enter into futures contracts to gain exposure to changes in the value of, or as a substitute for investing directly in (or shorting), an underlying Index, currency or commodity. A futures contract obligates the seller to deliver (and the purchaser to accept) the future delivery of a specified quantity and type of asset at a specified time and place. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity, if applicable, or by making an offsetting sale or purchase of an identical futures contract on the same or linked exchange before the designated date of delivery, or by cash settlement at expiration of contract. Upon entering into a futures contract, each Fund is required to deposit and maintain as collateral at least such initial margin as required by the exchange on which the transaction is affected. The initial margin is segregated as cash and/or securities balances with brokers for futures contracts, as disclosed in the Statements of Financial Condition, and is restricted as to its use. The Funds that enter into futures contracts maintain collateral at the broker in the form of cash and/or securities. Pursuant to the futures contract, each Fund generally agrees to receive from or pay to the broker(s) an amount of cash equal to the daily fluctuation in value of the futures contract. Such receipts or payments are known as variation margin and are recorded by each Fund as unrealized gains or losses. Each Fund will realize a gain or loss upon closing of a futures transaction. Futures contracts involve, to varying degrees, elements of market risk (specifically commodity price risk or equity market volatility risk) and exposure to loss in excess of the amount of variation margin. The face or contract amounts reflect the extent of the total exposure each Fund has in the particular classes of instruments. Additional risks associated with the use of futures contracts are imperfect correlation between movements in the price of the futures contracts and the market value of the underlying Index or commodity and the possibility of an illiquid market for a futures contract. With futures contracts, there is minimal but some counterparty risk to the Funds since futures contracts are exchange-traded and the credit risk resides with the Funds’ clearing broker or clearinghouse itself. Many futures exchanges and boards of trade limit the amount of fluctuation permitted in futures contract prices during a single trading day. Once the daily limit has been reached in a particular contract, no trades may be made that day at a price beyond that limit or trading may be suspended for specified times during the trading day. Futures contracts prices could move to the limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of futures positions and potentially subjecting a Fund to substantial losses. If trading is not possible, or if a Fund determines not to close a futures position in anticipation of adverse price movements, the Fund will be required to make daily cash payments of variation margin. The risk the Fund will be unable to close out a futures position will be minimized by entering into such transactions on a national exchange with an active and liquid secondary market. Swap Agreements Certain of the Funds enter into swap agreements for purposes of pursuing their investment objectives or as a substitute for investing directly in (or shorting) an underlying Index, currency or commodity, or to create an economic hedge against a position. Swap agreements are two-party over-the-counter Generally, swap agreements entered into by the Funds calculate and settle the obligations of the parties to the agreement on a “net basis” with a single payment. Consequently, each Fund’s current obligations (or rights) under a swap agreement will generally be equal only to the net amount to be paid or received under the agreement based on the relative values of such obligations (or rights) (the “net amount”). In a typical swap agreement entered into by a Matching VIX Fund, an Ultra Fund, or an UltraPro Fund, the Matching VIX Fund, Ultra Fund, or UltraPro Fund would be entitled to settlement payments in the event the level of the benchmark increases and would be required to make payments to the swap counterparties in the event the level of the benchmark decreases, adjusted for any transaction costs or trading spreads on the notional amount the Funds may pay. In a typical swap agreement entered into by a Short Fund, an UltraShort Fund, or an UltraPro Short Fund, the Short Fund, UltraShort Fund, or UltraPro Short Fund would be required to make payments to the swap counterparties in the event the level of the benchmark increases and would be entitled to settlement payments in the event the level of the benchmark decreases, adjusted for any transaction costs or trading spreads on the notional amount the Funds may pay. The net amount of the excess, if any, of each Fund’s obligations over its entitlements with respect to each OTC swap agreement is accrued on a daily basis and an amount of cash and/or securities having an aggregate value at least equal to such accrued excess is maintained for the benefit of the counterparty in a segregated account by the Funds’ Custodian. The net amount of the excess, if any, of each Fund’s entitlements over its obligations with respect to each OTC swap agreement is accrued on a daily basis and an amount of cash and/or securities having an aggregate value at least equal to such accrued excess is maintained for the benefit of the Fund in a segregated account by a third party custodian. Until a swap agreement is settled in cash, the gain or loss on the notional amount less any transaction costs or trading spreads payable by each Fund on the notional amount are recorded as “unrealized appreciation or depreciation on swap agreements” and, when cash is exchanged, the gain or loss realized is recorded as “realized gains or losses on swap agreements.” Swap agreements are generally valued at the last settled price of the benchmark referenced asset. Swap agreements contain various conditions, events of default, termination events, covenants and representations. The triggering of certain events or the default on certain terms of the agreement could allow a party to terminate a transaction under the agreement and request immediate payment in an amount equal to the net positions owed to the party under the agreement. This could cause a Fund to have to enter into a new transaction with the same counterparty, enter into a transaction with a different counterparty or seek to achieve its investment objective through any number of different investments or investment techniques. Swap agreements involve, to varying degrees, elements of market risk and exposure to loss in excess of the unrealized gain/loss reflected. The notional amounts reflect the extent of the total investment exposure each Fund has under the swap agreement, which may exceed the NAV of each Fund. Additional risks associated with the use of swap agreements are imperfect correlations between movements in the notional amount and the price of the underlying reference Index and the inability of counterparties to perform. Each Fund bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. A Fund will typically enter into swap agreements only with major global financial institutions. The creditworthiness of each of the firms that is a party to a swap agreement is monitored by the Sponsor. The Sponsor may use various techniques to minimize credit risk including early termination and payment, using different counterparties, limiting the net amount due from any individual counterparty and generally requiring collateral to be posted by the counterparty in an amount approximately equal to that owed to the Funds. All of the outstanding swap agreements at December 31, 2019 The Funds, as applicable, collateralize swap agreements by segregating or designating cash and/or certain securities as indicated on the Statements of Financial Condition or Schedules of Investments. As noted above, collateral posted in connection with OTC derivative transactions is held for the benefit of the counterparty in a segregated tri-party non-payment The Funds remain subject to credit risk with respect to the amount they expect to receive from counterparties. However, the Funds have sought to mitigate these risks in connection with OTC swaps by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes the Fund, subject to certain minimum thresholds. In the event of a bankruptcy of a counterparty, such Fund will have direct access to the collateral received from the counterparty, generally as of the day prior to the bankruptcy, because there is a one day time lag between the Fund’s request for collateral and the delivery of such collateral. To the extent any such collateral is insufficient, the Funds will be exposed to counterparty risk as described above, including the possible delays in recovering amounts as a result of bankruptcy proceedings. As of December 31, 2019, the collateral posted by counterparties consisted of cash and/or U.S. Treasury securities. The counterparty/credit risk for cleared derivative transactions is generally lower than for OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations. In addition, cleared derivative transactions benefit from daily marking-to-market Forward Contracts Certain of the Funds enter into forward contracts for the purpose of pursuing their investment objectives and as a substitute for investing directly in (or shorting) commodities and/or currencies. A forward contract is an agreement between two parties to purchase or sell a specified quantity of an asset at or before a specified date in the future at a specified price. Forward contracts are typically traded in OTC markets and all details of the contracts are negotiated between the counterparties to the agreement. Accordingly, the forward contracts are valued by reference to the contracts traded in the OTC markets. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity or currency, establishing an opposite position in the contract and recognizing the profit or loss on both positions simultaneously on the delivery date or, in some instances, paying a cash settlement before the designated date of delivery. The forward contracts are adjusted by the daily fluctuation of the underlying commodity or currency and any gains or losses are recorded for financial statement purposes as unrealized gains or losses until the contract settlement date. Forward contracts have traditionally not been cleared or guaranteed by a third party. As a result of the Dodd-Frank Act, the CFTC now regulates non-deliverable non-deliverable non-deliverable The Funds may collateralize OTC forward commodity contracts by segregating or designating cash and/or certain securities as indicated on their Statements of Financial Condition or Schedules of Investments. Such collateral is held for the benefit of the counterparty in a segregated tri-party non-payment The Funds remain subject to credit risk with respect to the amount they expect to receive from counterparties. However, the Funds have sought to mitigate these risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes the Fund, subject to minimum thresh olds. In the event of the bankruptcy of a counterparty, the Fund will have direct access to the collateral received from the counterparty, generally as of the day prior to the bankruptcy, because there is a one day time lag between the Fund’s request for collateral and the delivery of such collateral. To the extent any such collateral is insufficient, the Fund will be exposed to counterparty risk as described above, including the possible delays in recovering amounts as a result of bankruptcy proceedings. As of December 31, 2019, the collateral posted by counterparties consisted of cash and/or U.S. Treasury securities. Participants in trading foreign exchange forward contracts often do not require margin deposits, but rely upon internal credit limitations and their judgments regarding the creditworthiness of their counterparties. In recent years, however, many OTC market participants in foreign exchange trading have begun to require their counterparties to post margin. A Fund will typically enter into forward contracts only with major global financial institutions. The creditworthiness of each of the firms that is a party to a forward contract is monitored by the Sponsor. The counterparty/credit risk for cleared derivative transactions is generally lower than for OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations. In addition, cleared derivative transactions benefit from daily marking-to-market The following tables indicate the location of derivative related items on the Statement of Financial Condition as well as the effect of derivative instruments on the Statement of Operations during the reporting period. Fair Value of Derivative Instruments as of December 31, 2019 Asset Derivatives Liability Derivatives Derivatives Not Accounted for as Hedging Instruments Fund Statements of Unrealized Statements of Unrealized VIX Futures Contracts Receivables on open futures contracts and/or unrealized appreciation on swap agreements Payable on open futures contracts and/or unrealized depreciation on swap agreements ProShares Short VIX Short-Term $ 10,424,889 * $ 170,017 * ProShares Ultra VIX Short-Term — 46,606,565 * ProShares VIX Mid-Term 6,130 * 2,286,955 * ProShares VIX Short-Term — 15,394,011 * Commodities Contracts Receivables on open futures contracts and/or unrealized appreciation on swap agreements Payable on open futures contracts and/or unrealized depreciation on swap agreements ProShares Ultra Bloomberg Crude Oil 22,580,165 * — ProShares Ultra Bloomberg Natural Gas — 2,652,228 * ProShares Ultra Gold 8,138,774 * — ProShares Ultra Silver 30,860,447 * — ProShares UltraPro 3x Crude Oil ETF 7,266,550 * — ProShares UltraPro 3x Short Crude Oil ETF — 8,358,056 * ProShares UltraShort Bloomberg Crude Oil — 7,152,620 * ProShares UltraShort Bloomberg Natural Gas 672,329 * — ProShares UltraShort Gold — 1,564,379 * ProShares UltraShort Silver — 2,036,085 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts ProShares Short Euro — 14,000 * ProShares Ultra Euro 109,997 — ProShares Ultra Yen — 10,529 ProShares UltraShort Australian Dollar — 224,000 * ProShares UltraShort Euro 115,751 2,366,171 ProShares UltraShort Yen 95,899 — Total Trust $ 80,270,931 * $ 88,835,616 * * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. Fair Value of Derivative Instruments as of December 31, 2018 Asset Derivatives Liability Derivatives Derivatives Not Fund Statements of Unrealized Statements of Unrealized VIX Futures Contracts Receivables on open futures contracts, unrealized appreciation on swap agreements Payable on open futures contracts, unrealized depreciation on swap agreements ProShares Short VIX Short-Term $ 910,460 * $ 15,386,661 * ProShares Ultra VIX Short-Term 33,798,582 * 2,625,566 * ProShares VIX Mid-Term 3,888,156 * 130,050 * ProShares VIX Short-Term Futures ETF 18,392,959 * 1,014,514 * Commodities Contracts Receivables on open futures contracts and/or unrealized appreciation on swap agreements Payable on open futures contracts and/or unrealized depreciation on swap agreements ProShares Ultra Bloomberg Crude Oil — 86,807,426 * ProShares Ultra Bloomberg Natural Gas — 10,323,163 * ProShares Ultra Gold 4,325,971 * — ProShares Ultra Silver 26,642,453 * — ProShares UltraPro 3x Crude Oil ETF — 23,451,361 * ProShares UltraPro 3x Short Crude Oil ETF 7,019,475 * — ProShares UltraShort Bloomberg Crude Oil 23,918,881 * — ProShares UltraShort Bloomberg Natural Gas 10,837,989 * — ProShares UltraShort Gold — 1,022,566 * ProShares UltraShort Silver — 1,837,928 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts ProShares Short Euro — 43,281 * ProShares Ultra Euro 61,971 4,033 ProShares Ultra Yen 179,187 2,076 ProShares UltraShort Australian Dollar 511,825 * — ProShares UltraShort Euro 104,074 1,599,878 ProShares UltraShort Yen 678,152 3,801,896 Total Trust $ 131,270,135 * $ 148,050,399 * * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. The Effect of Derivative Instruments on the Statement of Operations Derivatives Not Accounted Location of Gain Fund Realized Gain Change in VIX Futures Contracts Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements ProShares Short VIX Short-Term $ 125,639,084 $ 24,731,073 ProShares Ultra VIX Short-Term (612,858,632 ) (77,779,581 ) ProShares VIX Mid-Term (6,228,652 ) (6,038,931 ) ProShares VIX Short-Term Futures ETF (194,363,991 ) (32,772,456 ) Commodities Contracts Net realized gain (loss) on futures contracts, forward and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts, forward and/or swap agreements ProShares Ultra Bloomberg Crude Oil 144,170,473 109,387,591 ProShares Ultra Bloomberg Natural Gas (32,380,194 ) 7,670,935 ProShares Ultra Gold 19,587,937 3,812,803 ProShares Ultra Silver 34,367,044 4,217,994 ProShares UltraPro 3x Crude Oil ETF 69,170,933 30,717,911 ProShares UltraPro 3x Short Crude Oil ETF (2,410,550 ) (15,377,531 ) ProShares UltraShort Bloomberg Crude Oil (14,251,700 ) (31,071,501 ) ProShares UltraShort Bloomberg Natural Gas 19,286,567 (10,165,660 ) ProShares UltraShort Gold (5,193,260 ) (541,813 ) ProShares UltraShort Silver (4,544,770 ) (198,157 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts ProShares Short Euro 972,479 29,281 ProShares Ultra Euro (722,691 ) 52,059 ProShares Ultra Yen 58,152 (187,640 ) ProShares UltraShort Australian Dollar 833,171 (735,825 ) ProShares UltraShort Euro 13,745,299 (754,616 ) ProShares UltraShort Yen (1,979,140 ) 3,219,643 Total Trust $ (447,102,441 ) $ 8,215,579 The Effect of Derivative Instruments on the Statement of Operations For the year ended December 31, 2018 Derivatives Not Accounted Location of Gain Fund Realized Gain Change in VIX Futures Contracts Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements ProShares Short VIX Short-Term Futures ETF $ (1,885,564,719 ) $ (31,517,650 ) ProShares Ultra VIX Short-Term Futures ETF 390,000,742 65,639,136 ProShares VIX Mid-Term 4,332,654 5,973,386 ProShares VIX Short-Term Futures ETF 89,903,111 22,140,322 Commodities Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/ changes in unrealized appreciation/ depreciation on futures contracts, swap and/ or forward agreements ProShares Ultra Bloomberg Crude Oil 21,756,994 (160,991,766 ) ProShares Ultra Bloomberg Natural Gas 21,092,864 (17,548,973 ) ProShares Ultra Gold (7,345,006 ) 674,136 ProShares Ultra Silver (57,488,526 ) 4,905,519 ProShares UltraPro 3x Crude Oil ETF (37,435,672 ) (24,869,359 ) ProShares UltraPro 3x Short Crude Oil ETF 7,377,281 10,007,630 ProShares UltraShort Bloomberg Crude Oil (42,040,086 ) 58,488,671 ProShares UltraShort Bloomberg Natural Gas (14,147,964 ) 11,935,038 ProShares UltraShort Gold 1,323,579 471,153 ProShares UltraShort Silver 5,024,976 (120,115 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/ or foreign currency forward contracts/ changes in unrealized appreciation (depreciation) on futures and/ or foreign currency forward contracts ProShares Short Euro 459,984 123,007 ProShares Ultra Euro (1,063,823 ) (206,214 ) ProShares Ultra Yen (170,364 ) 211,935 ProShares UltraShort Australian Dollar 128,451 1,405,045 ProShares UltraShort Euro 18,953,455 4,848,465 ProShares UltraShort Yen 2,111,627 (4,651,007 ) Total Trust $ (1,482,790,442 ) $ (53,081,641 ) The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2017 Derivatives Not Accounted Location of Gain (Loss) on Derivatives Fund Realized Gain Change in Unrealized Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts/ changes in unrealized appreciation (depreciation) on futures contracts ProShares Short VIX Short-Term Futures ETF $ 897,400,516 $ 27,351,060 ProShares Ultra VIX Short-Term Futures ETF (1,020,750,851 ) (26,493,883 ) ProShares VIX Mid-Term (25,319,770 ) (927,035 ) ProShares VIX Short-Term Futures ETF (194,005,568 ) (4,293,225 ) Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation (depreciation) on futures contracts, swap and/or forward agreements ProShares Ultra Bloomberg Crude Oil 22,146,212 13,288,604 ProShares Ultra Bloomberg Natural Gas (40,793,265 ) 4,689,090 ProShares Ultra Gold 11,484,410 8,101,902 ProShares Ultra Silver (31,762,834 ) 42,740,483 ProShares UltraPro 3x Crude Oil ETF 6,018,618 1,417,998 ProShares UltraPro 3x Short Crude Oil ETF (7,046,628 ) (2,988,155 ) ProShares UltraShort Bloomberg Crude Oil (6,491,060 ) (20,936,094 ) ProShares UltraShort Bloomberg Natural Gas 4,762,532 (615,018 ) ProShares UltraShort Gold (6,993,557 ) (4,546,265 ) ProShares UltraShort Silver 1,153,393 (3,129,369 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts ProShares Short Euro (1,161,987 ) (299,188 ) ProShares Ultra Euro 2,212,313 838,162 ProShares Ultra Yen (46,195 ) 307,252 ProShares UltraShort Australian Dollar (866,771 ) (2,075,560 ) ProShares UltraShort Euro (39,691,680 ) (22,507,200 ) ProShares UltraShort Yen (8,729,472 ) (15,217,674 ) Total Trust $ (438,481,644 ) $ (5,294,115 ) Offsetting Assets and Liabilities Each Fund is subject to master netting agreements or similar arrangements that allow for amounts owed between each Fund and the counterparty to be netted upon an early termination. The party that has the larger payable pays the excess of the larger amount over the smaller amount to the other party. The master netting agreements or similar arrangements do not apply to amounts owed to/from different counterparties. As described above, the Funds utilize derivative instruments to achieve their investment objective during the year. The amounts shown in the Statements of Financial Condition do not take into consideration the effects of legally enforceable master netting agreements or similar arrangements. For financial reporting purposes, the Funds do not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statements of Financial Condition. The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2019. Fair Values of Derivative Instruments as of December 31, 2019 Assets Liabilities Fund Gross Amounts Gross Amounts Net Amounts of Gross Amounts Gross Amounts Net Amounts of ProShares Ultra Bloomberg Crude Oil Swap agreements $ 21,814,590 $ — $ 21,814,590 $ — $ — $ — ProShares Ultra Euro Foreign currency forward contracts 109,997 — 109,997 — — — ProShares Ultra Gold Swap agreements 5,890,260 — 5,890,260 — — — ProShares Ultra Silver Swap agreements 25,135,898 — 25,135,898 — — — ProShares Ultra VIX Short-Term Futures ETF Swap agreements — — — 209,784 — 209,784 ProShares Ultra Yen Foreign currency forward contracts — — — 10,529 — 10,529 ProShares UltraShort Bloomberg Crude Oil Swap agreements — — — 4,033,931 — 4,033,931 ProShares UltraShort Euro Foreign currency forward contracts 115,751 — 115,751 2,366,171 — 2,366,171 ProShares UltraShort Gold Swap agreements — — — 1,172,809 — 1,172,809 ProShares UltraShort Silver Swap agreements — — — 1,953,904 — 1,953,904 ProShares UltraShort Yen Foreign currency forward contracts 95,899 — 95,899 — — — Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2019. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2019 Amounts of Recognized Financial Instruments Cash Collateral for the Net Amount ProShares Ultra Bloomberg Crude Oil Citibank, N.A. $ 6,039,121 $ — $ (6,039,121 ) $ — Goldman Sachs International 4,393,163 (4,393,163 ) — — Royal Bank of Canada 4,210,281 — (4,210,281 ) — Societe Generale 2,253,037 (2,253,037 ) — — UBS AG 4,918,988 (4,918,988 ) — — ProShares Ultra Euro Goldman Sachs International 54,679 — — 54,679 UBS AG 55,318 — — 55,318 ProShares Ultra Gold Citibank, N.A. 2,300,665 — (1,960,000 ) 340,665 Goldman Sachs International 1,681,492 (1,489,073 ) — 192,419 UBS AG 1,908,103 (1,638,362 ) — 269,741 ProShares Ultra Silver Citibank, N.A. 10,329,244 — (10,329,244 ) — Goldman Sachs International 5,925,755 (5,925,755 ) — — UBS AG 8,880,899 (8,880,899 ) — — ProShares Ultra VIX Short-Term Futures ETF Goldman Sachs & Co. (209,784 ) — 209,784 — ProShares Ultra Yen Goldman Sachs International (2,404 ) — 2,404 — UBS AG (8,125 ) — 8,125 — ProShares UltraShort Bloomberg Crude Oil Citibank, N.A. (1,401,797 ) 1,401,797 — — Goldman Sachs International (793,395 ) 793,395 — — Royal Bank of Canada (815,341 ) 815,341 — — Societe Generale (325,459 ) — 325,459 — UBS AG (697,939 ) — 697,939 — ProShares UltraShort Euro Goldman Sachs International (1,134,162 ) 1,134,162 — — UBS AG (1,116,258 ) 1,116,258 — — ProShares UltraShort Gold Citibank, N.A. (534,714 ) 534,714 — — Goldman Sachs International (263,870 ) 263,870 — — UBS AG (374,225 ) — 374,225 — ProShares UltraShort Silver Citibank, N.A. (788,313 ) 788,313 — — Goldman Sachs International (401,324 ) — 401,324 — UBS AG (764,267 ) 764,267 — — ProShares UltraShort Yen Goldman Sachs International 32,828 (32,828 ) — — UBS AG 63,071 (63,071 ) — — The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2018: Fair Values of Derivative Instruments as of December 31, 2018 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares Ultra Bloomberg Crude Oil Swap agreements $ — $ — $ — $ 72,767,125 $ — $ 72,767,125 ProShares Ultra Euro Foreign currency forward contracts 61,971 — 61,971 4,033 — 4,033 ProShares Ultra Gold Forward agreements 4,253,301 — 4,253,301 — — — ProShares Ultra Silver Forward agreements 26,301,717 — 26,301,717 — — — ProShares Ultra VIX Short-Term Futures ETF Swap agreements — — — 1,330,949 — 1,330,949 ProShares Ultra Yen Foreign currency forward contracts 179,187 — 179,187 2,076 — 2,076 ProShares UltraShort Bloomberg Crude Oil Swap agreements 20,646,726 — 20,646,726 — — — ProShares UltraShort Euro Foreign currency forward contracts 104,074 — 104,074 1,599,878 — 1,599,878 ProShares UltraShort Gold Forward agreements — — — 990,786 — 990,786 ProShares UltraShort Silver Forward agreements — — — 1,793,011 — 1,793,011 ProShares UltraShort Yen Foreign currency forward contracts 678,152 — 678,152 3,801,896 — 3,801,896 Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2018. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2018 Amounts of Recognized Financial Instruments Cash Collateral for the Net Amount ProShares Ultra Bloomberg Crude Oil Citibank, N.A. $ (22,752,565 ) $ 20,667,565 $ 2,085,000 $ — Goldman Sachs International (15,691,687 ) 10,417,687 5,274,000 — Royal Bank of Canada (13,836,386 ) 13,836,386 — — Societe Generale (5,206,589 ) 1,491,589 3,715,000 — UBS AG (15,279,898 ) 15,156,898 123,000 — ProShares Ultra Euro Goldman Sachs International 26,209 — — 26,209 UBS AG 31,729 — — 31,729 ProShares Ultra Gold Citibank, N.A. 1,682,026 (1,682,026 ) — — Goldman Sachs International 1,223,528 (1,223,528 ) — — Societe Generale 61,260 — — 61,260 UBS AG 1,286,487 (1,286,487 ) — — ProShares Ultra Silver Citibank, N.A. 9,662,061 (8,053,860 ) — 1,608,201 Goldman Sachs International 8,418,745 (1,655,971 ) — 6,762,774 Societe Generale 118,797 — — 118,797 UBS AG 8,102,114 (6,971,401

Agreements

Agreements	12 Months Ended
	Dec. 31, 2019
Text Block [Abstract]
Agreements	NOTE 4 – AGREEMENTS Management Fee Each Leveraged Fund, the Short Euro Fund and each Geared VIX Fund pays the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.95% per annum of its average daily NAV of such Fund. Each Matching VIX Fund pays the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.85 The Management Fee is paid in consideration of the Sponsor’s trading advisory services and the other services provided to the Fund that the Sponsor pays directly. From the Management Fee, the Sponsor pays all of the routine operational, administrative and other ordinary expenses of each Fund, generally as determined by the Sponsor, including but not limited to, (i) the Administrator, Custodian, Distributor, ProFunds Distributors, Inc. (“PDI”), an affiliated broker-dealer of the Sponsor, Transfer Agent, accounting and auditing fees and expenses, (ii) any Index licensors for the Funds; and (iii) the normal and expected expenses incurred in connection with the continuous offering of Shares of each Fund after the commencement of its trading operations. Fees associated with a Fund’s trading operations may include expenses such as tax preparation expenses, legal fees not in excess of $100,000 per annum, ongoing SEC registration fees not exceeding 0.021% per annum of the NAV of a Fund and Financial Industry Regulatory Authority (“FINRA”) filing fees, individual Schedule K-1 Non-Recurring Each Fund pays all its non-recurring Non-recurring The Administrator BNY Mellon Asset Servicing, a division of The Bank of New York Mellon (“BNY Mellon”) serves as the Administrator of the Funds. The Trust, on its own behalf and on behalf of each Fund, and BNY Mellon have entered into an administration and accounting agreement (the “Administration and Accounting Agreement”) in connection therewith. Pursuant to the terms of the Administration and Accounting Agreement and under the supervision and direction of the Sponsor and the Trust, BNY Mellon prepares and files certain regulatory filings on behalf of the Funds. BNY Mellon may also perform other services for the Funds pursuant to the Administration and Accounting Agreement as mutually agreed upon by the Sponsor, the Trust and BNY Mellon from time to time. The Administrator’s fees are paid on behalf of the Funds by the Sponsor. Brown Brothers Harriman and Co. (“BBH&Co.”) served as administrator of the Funds and the Trust until replaced by BNY Mellon on October 1, 2018. The Custodian BNY Mellon serves as the Custodian of the Funds, and the Trust, on its own behalf and on behalf of each Fund, and BNY Mellon have entered into a custody agreement (the “Custody Agreement”) in connection therewith. Pursuant to the terms of the Custody Agreement, BNY Mellon is responsible for the holding and safekeeping of assets delivered to it by the Funds, and performing various administrative duties in accordance with instructions delivered to BNY Mellon by the Funds. The Custodian’s fees are paid on behalf of the Funds by the Sponsor. BBH&Co. served as custodian of the Funds and the Trust until replaced by BNY Mellon on October 1, 2018. The Transfer Agent BNY Mellon serves as the Transfer Agent of the Funds for Authorized Participants and has entered into a transfer agency and service agreement (the “Transfer Agency and Service Agreement”). Pursuant to the terms of the Transfer Agency and Service Agreement, BNY Mellon is responsible for processing purchase and redemption orders and maintaining records of ownership of the Funds. The Transfer Agent Fees are paid on behalf of the Funds by the Sponsor. BBH&Co. served as transfer agent of the Fund and the Trust until replaced by BNY Mellon on October 1, 2018. The Distributor SEI Investments Distribution Co. (“SEI”), serves as Distributor of the Funds and assists the Sponsor and the Administrator with certain functions and duties relating to distribution and marketing, including taking creation and redemption orders, consulting with the marketing staff of the Sponsor and its affiliates with respect to compliance with the requirements of FINRA and/or the NFA in connection with marketing efforts, and reviewing and filing of marketing materials with FINRA and/or the NFA. SEI retains all marketing materials separately for each Fund, at c/o SEI, One Freedom Valley Drive, Oaks, PA 19456. The Sponsor, on behalf of each Fund, has entered into a Distribution Services Agreement with SEI. The Sponsor pays SEI for performing its duties on behalf of the Funds.

Offering Costs

Offering Costs	12 Months Ended
	Dec. 31, 2019
Text Block [Abstract]
Offering Costs	NOTE 5 – OFFERING COSTS Offering costs will be amortized by the Funds over a twelve month period on a straight-line basis beginning once the fund commences operations. The Sponsor will not charge its Management Fee in the first year of operations of a Fund in an amount equal to the offering costs. Normal and expected expenses incurred in connection with the continuous offering of Shares of a Fund after the commencement of its trading operations will be paid by the Sponsor.

Creation and Redemption of Crea

Creation and Redemption of Creation Units	12 Months Ended
	Dec. 31, 2019
Text Block [Abstract]
Creation and Redemption of Creation Units	NOTE 6 – CREATION AND REDEMPTION OF CREATION UNITS Each Fund issues and redeems shares from time to time, but only in one or more Creation Units. A Creation Unit is a block of 50,000 Shares of a Geared Fund and 25,000 Shares of a Matching VIX Fund. Creation Units may be created or redeemed only by Authorized Participants. As a result of the Share splits and reverse Share splits as described in Note 1, certain redemptions as disclosed in the Statements of Changes in Shareholders’ Equity reflect payment of fractional share balances on beneficial shareholder accounts. Except when aggregated in Creation Units, the Shares are not redeemable securities. Retail investors, therefore, generally will not be able to purchase or redeem Shares directly from or with a Fund. Rather, most retail investors will purchase or sell Shares in the secondary market with the assistance of a broker. Thus, some of the information contained in these Notes to Financial Statements—such as references to the Transaction Fees imposed on purchases and redemptions is not relevant to retail investors. Transaction Fees on Creation and Redemption Transactions The manner by which Creation Units are purchased or redeemed is governed by the terms of the Authorized Participant Agreement and Authorized Participant Procedures Handbook. By placing a purchase order, an Authorized Participant agrees to: (1) deposit cash with the Custodian; and (2) if permitted by the Sponsor in its sole discretion, enter into or arrange for an exchange of futures contract for related position or block trade with the relevant fund whereby the Authorized Participant would also transfer to such Fund a number and type of exchange-traded futures contracts at or near the closing settlement price for such contracts on the purchase order date. Authorized Participants may pay a fixed transaction fee (typically $250) in connection with each order to create or redeem a Creation Unit in order to compensate BNY Mellon, as the Administrator, the Custodian and the Transfer Agent of each Fund and its Shares, for services in processing the creation and redemption of Creation Units and to offset the costs of increasing or decreasing derivative positions. Authorized Participants also may pay a variable transaction fee to the Fund of up to 0.10% (and a variable transaction fee to the Matching VIX Funds of 0.05%) of the value of the Creation Unit that is purchased or redeemed unless the transaction fee is waived or otherwise adjusted by the Sponsor. The Sponsor provides such Authorized Participant with prompt notice in advance of any such waiver or adjustment of the transaction fee. Authorized Participants may sell the Shares included in the Creation Units they purchase from the Funds to other investors in the secondary market. Transaction fees for the for the years ended December 31, 2019, 2018 and 2017 which are included in the Addition and/or Redemption of Shares on the Statements of Changes in Shareholders’ Equity, were as follows: Fund Year Ended Year Ended Year Ended ProShares Short Euro $ — $ — $ — ProShares Short VIX Short-Term Futures ETF 189,274 699,323 1,008,452 ProShares Ultra Bloomberg Crude Oil 57,619 235,966 610,969 ProShares Ultra Bloomberg Natural Gas 5,580 16,562 15,937 ProShares Ultra Euro — — — ProShares Ultra Gold 1,632 10,139 14,460 ProShares Ultra Silver 7,332 26,173 28,622 ProShares Ultra VIX Short-Term Futures ETF 1,925,312 2,194,669 1,036,162 ProShares Ultra Yen — — — ProShares UltraPro 3x Crude Oil ETF 24,934 81,882 25,455 ProShares UltraPro 3x Short Crude Oil ETF 8,919 46,345 14,096 ProShares UltraShort Australian Dollar — — — ProShares UltraShort Bloomberg Crude Oil 27,697 135,524 207,707 ProShares UltraShort Bloomberg Natural Gas 1,378 9,616 4,713 ProShares UltraShort Euro — — — ProShares UltraShort Gold 1,606 10,644 15,945 ProShares UltraShort Silver — — — ProShares UltraShort Yen — — — ProShares VIX Mid-Term 18,415 27,723 13,605 ProShares VIX Short-Term Futures ETF 205,080 160,987 142,380 Total Trust $ 2,474,778 $ 3,655,553 $ 3,138,503

Financial Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Financial Highlights	NOTE 7 – FINANCIAL HIGHLIGHTS Selected data for a Share outstanding throughout the year ended December 31, 2019: For the Year Ended December 31, 2019 Per Share Operating Short Euro Short VIX Short-Term Ultra Ultra Ultra Euro Ultra Gold Net asset value, at December 31, 2018 $ 43.10 $ 42.36 $ 13.06 $ 25.28 $ 15.09 $ 37.12 Net investment income (loss) 0.55 0.18 0.19 0.07 0.13 0.42 Net realized and unrealized gain (loss)# 1.99 23.08 7.12 (16.95 ) (1.43 ) 11.67 Change in net asset value from operations 2.54 23.26 7.31 (16.88 ) (1.30 ) 12.09 Net asset value, at December 31, 2019 $ 45.64 $ 65.62 $ 20.37 $ 8.40 $ 13.79 $ 49.21 Market value per share, at December 31, 2018 † $ 43.08 $ 42.30 $ 13.30 $ 25.82 $ 15.12 $ 37.41 Market value per share, at December 31, 2019 † $ 45.69 $ 65.23 $ 20.46 $ 8.34 $ 13.77 $ 49.05 Total Return, at net asset value 5.9 % 54.9 % 56.0 % (66.8 )% (8.6 )% 32.6 % Total Return, at market value 6.0 % 54.2 % 53.8 % (67.7 )% (8.9 )% 31.1 % Ratios to Average Net Assets Expense ratio 0.97 % 1.27 %^^ 0.99 % 1.37 % 0.95 % 0.96 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 1.24 % 0.33 % 1.02 % 0.52 % 0.89 % 0.97 % # † ^^ non-recurring 1.16 For the Year Ended December 31, 2019 Per Share Operating Ultra Silver Ultra VIX Short-Term Ultra Yen UltraPro 3x UltraPro 3x UltraShort Net asset value, at December 31, 2018 $ 26.39 $ 81.46 $ 57.53 $ 13.08 $ 49.79 $ 55.30 Net investment income (loss) 0.25 0.01 0.52 0.14 0.05 0.59 Net realized and unrealized gain (loss)# 5.06 (68.80 ) (2.22 ) 8.25 (39.18 ) 0.20 Change in net asset value from operations 5.31 (68.79 ) (1.70 ) 8.39 (39.13 ) 0.79 Net asset value, at December 31, 2019 $ 31.70 $ 12.67 $ 55.83 $ 21.47 $ 10.66 $ 56.09 Market value per share, at December 31, 2018 † $ 26.37 $ 81.73 $ 57.55 $ 13.47 $ 48.43 $ 54.92 Market value per share, at December 31, 2019 † $ 31.65 $ 12.89 $ 55.83 $ 21.60 $ 10.58 $ 55.88 Total Return, at net asset value 20.1 % (84.4 )% (3.0 )% 64.1 % (78.6 )% 1.4 % Total Return, at market value 20.0 % (84.2 )% (3.0 )% 60.4 % (78.2 )% 1.7 % Ratios to Average Net Assets Expense ratio 0.97 % 1.54 %^^ 0.95 % 1.25 % 1.40 % 1.03 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.91 % 0.02 % 0.92 % 0.66 % 0.31 % 1.05 % # † ^^ non-recurring 1.53 For the Year Ended December 31, 2019 Per Share Operating UltraShort UltraShort UltraShort UltraShort UltraShort UltraShort Net asset value, at December 31, 2018 $ 29.79 $ 21.61 $ 24.27 $ 73.28 $ 37.13 $ 73.89 Net investment income (loss) 0.14 0.08 0.29 0.59 0.31 0.87 Net realized and unrealized gain (loss)# (17.74 ) 16.84 2.24 (20.85 ) (10.68 ) 1.61 Change in net asset value from operations (17.60 ) 16.92 2.53 (20.26 ) (10.37 ) 2.48 Net asset value, at December 31, 2019 $ 12.19 $ 38.53 $ 26.80 $ 53.02 $ 26.76 $ 76.37 Market value per share, at December 31, 2018 † $ 29.28 $ 21.22 $ 24.25 $ 72.84 $ 37.10 $ 73.86 Market value per share, at December 31, 2019 † $ 12.15 $ 38.82 $ 26.80 $ 53.21 $ 26.80 $ 76.35 Total Return, at net asset value (59.1 )% 78.3 % 10.4 % (27.6 )% (27.9 )% 3.4 % Total Return, at market value (58.5 )% 82.9 % 10.5 % (26.9 )% (27.8 )% 3.4 % Ratios to Average Net Assets Expense ratio 1.06 % 1.57 % 0.95 % 0.98 % 1.00 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.88 % 0.33 % 1.12 % 0.94 % 0.90 % 1.17 % # † For the Year Ended December 31, 2019 Per Share Operating VIX Mid- Term Futures VIX Short- Net asset value, at December 31, 2018 $ 26.65 $ 38.58 Net investment income (loss) 0.25 0.18 Net realized and unrealized gain (loss)# (5.63 ) (26.46 ) Change in net asset value from operations (5.38 ) (26.28 ) Net asset value, at December 31, 2019 $ 21.27 $ 12.30 Market value per share, at December 31, 2018 † $ 26.74 $ 38.61 Market value per share, at December 31, 2019 † $ 21.29 $ 12.43 Total Return, at net asset value (20.2 )% (68.1 )% Total Return, at market value (20.4 )% (67.8 )% Ratios to Average Net Assets Expense ratio 0.92 % 0.96 % Expense ratio, excluding non-recurring 0.85 % 0.85 % Net investment income gain (loss) 1.10 % 0.90 % # † Selected data for a Share outstanding throughout the year ended December 31, 2018: For the Year Ended December 31, 2018 Per Share Operating Short Euro Short VIX Short-Term * Ultra Ultra * Ultra Euro Ultra Gold Net asset value, at December 31, 2017 $ 39.96 $ 509.20 $ 23.66 $ 32.64 $ 17.44 $ 39.88 Net investment income (loss) 0.22 (0.23 ) 0.20 0.09 0.06 0.28 Net realized and unrealized gain (loss)# 2.92 (466.61 ) (10.80 ) (7.45 ) (2.41 ) (3.04 ) Change in net asset value from operations 3.14 (466.84 ) (10.60 ) (7.36 ) (2.35 ) (2.76 ) Net asset value, at December 31, 2018 $ 43.10 $ 42.36 $ 13.06 $ 25.28 $ 15.09 $ 37.12 Market value per share, at December 31, 2017 † $ 39.99 $ 512.84 $ 23.44 $ 32.50 $ 17.46 $ 40.67 Market value per share, at December 31, 2018 † $ 43.08 $ 42.30 $ 13.30 $ 25.82 $ 15.12 $ 37.41 Total Return, at net asset value 7.9 % (91.7 )% (44.8 )% (22.5 )% (13.5 )% (6.9 )% Total Return, at market value 7.7 % (91.8 )% (43.3 )% (20.6 )% (13.4 )% (8.0 )% Ratios to Average Net Assets Expense ratio 0.97 % 1.34 % 0.97 % 1.22 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.54 % (0.37 )% 0.73 % 0.30 % 0.36 % 0.73 % * # † For the Year Ended December 31, 2018 Per Share Operating Ultra Silver Ultra VIX Short-Term * Ultra Yen UltraPro 3x UltraPro 3x * UltraShort Net asset value, at December 31, 2017 $ 33.55 $ 51.67 $ 57.32 $ 37.78 $ 42.32 $ 45.67 Net investment income (loss) 0.20 (0.40 ) (0.02 ) (0.04 ) (0.12 ) 0.23 Net realized and unrealized gain (loss)# (7.36 ) 30.19 0.23 (24.66 ) 7.59 9.40 Change in net asset value from operations (7.16 ) 29.79 0.21 (24.70 ) 7.47 9.63 Net asset value, at December 31, 2018 $ 26.39 $ 81.46 $ 57.53 $ 13.08 $ 49.79 $ 55.30 Market value per share, at December 31, 2017 † $ 33.85 $ 51.05 $ 57.45 $ 37.23 $ 42.88 $ 45.72 Market value per share, at December 31, 2018 † $ 26.37 $ 81.73 $ 57.55 $ 13.47 $ 48.43 $ 54.92 Total Return, at net asset value (21.3 )% 57.7 % 0.4 % (65.4 )% 17.7 % 21.1 % Total Return, at market value (22.1 )% 60.1 % 0.2 % (63.8 )% 12.9 % 20.1 % Ratios to Average Net Assets Expense ratio 0.95 % 1.68 % 0.95 % 1.22 % 1.24 % 1.03 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.69 % (0.75 )% (0.03 )% (0.12 )% (0.45 )% 0.46 % * # † For the Year Ended December 31, 2018 Per Share Operating UltraShort UltraShort UltraShort UltraShort UltraShort UltraShort Net asset value, at December 31, 2017 $ 24.31 $ 39.48 $ 21.21 $ 70.47 $ 31.71 $ 74.93 Net investment income (loss) 0.11 (0.01 ) 0.16 0.47 0.20 0.53 Net realized and unrealized gain (loss)# 5.37 (17.86 ) 2.90 2.34 5.22 (1.57 ) Change in net asset value from operations 5.48 (17.87 ) 3.06 2.81 5.42 (1.04 ) Net asset value, at December 31, 2018 $ 29.79 $ 21.61 $ 24.27 $ 73.28 $ 37.13 $ 73.89 Market value per share, at December 31, 2017 † $ 24.56 $ 39.65 $ 21.20 $ 69.11 $ 31.40 $ 74.98 Market value per share, at December 31, 2018 † $ 29.28 $ 21.22 $ 24.25 $ 72.84 $ 37.10 $ 73.86 Total Return, at net asset value 22.5 % (45.3 )% 14.4 % 4.0 % 17.1 % (1.4 )% Total Return, at market value 19.2 % (46.5 )% 14.4 % 5.4 % 18.2 % (1.5 )% Ratios to Average Net Assets Expense ratio 0.98 % 1.41 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.59 % (0.05 )% 0.73 % 0.64 % 0.55 % 0.73 % # † Per Share Operating VIX Mid- Term Futures VIX Short- Net asset value, at December 31, 2017 $ 21.29 $ 23.34 Net investment income (loss) 0.10 0.08 Net realized and unrealized gain (loss)# 5.26 15.16 Change in net asset value from operations 5.36 15.24 Net asset value, at December 31, 2018 $ 26.65 $ 38.58 Market value per share, at December 31, 2017 † $ 21.15 $ 23.15 Market value per share, at December 31, 2018 † $ 26.74 $ 38.61 Total Return, at net asset value 25.2 % 65.3 % Total Return, at market value 26.4 % 66.8 % Ratios to Average Net Assets Expense ratio 0.97 % 1.00 % Expense ratio, excluding non-recurring 0.85 % 0.85 % Net investment income gain (loss) 0.45 % 0.30 % # † Selected data for a Share outstanding throughout the year ended December 31, 2017 For the Year Ended December 31, 2017 Per Share Operating Short Euro Short VIX Short-Term * Ultra Ultra * Ultra Euro Ultra Gold Net asset value, at December 31, 2016 $ 45.06 $ 182.46 $ 23.34 $ 94.24 $ 14.02 $ 32.90 Net investment income (loss) (0.14 ) (2.41 ) (0.03 ) (0.23 ) (0.04 ) (0.06 ) Net realized and unrealized gain (loss)# (4.96 ) 329.15 0.35 (61.37 ) 3.46 7.04 Change in net asset value from operations (5.10 ) 326.74 0.32 (61.60 ) 3.42 6.98 Net asset value, at December 31, 2017 $ 39.96 $ 509.20 $ 23.66 $ 32.64 $ 17.44 $ 39.88 Market value per share, at December 31, 2016 † $ 45.12 $ 181.96 $ 23.36 $ 94.80 $ 14.09 $ 33.20 Market value per share, at December 31, 2017 † $ 39.99 $ 512.84 $ 23.44 $ 32.50 $ 17.46 $ 40.67 Total Return, at net asset value (11.3 )% 179.0 % 1.4 % (65.4 )% 24.4 % 21.2 % Total Return, at market value (11.4 )% 181.8 % 0.3 % (65.7 )% 23.9 % 22.5 % Ratios to Average Net Assets Expense ratio 0.97 % 1.51 % 0.98 % 1.22 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) (0.32 )% (0.71 )% (0.18 )% (0.50 )% (0.23 )% (0.14 )% * # † For the Year Ended December 31, 2017 Per Share Operating Ultra Silver Ultra VIX Short-Term Ultra Yen UltraPro 3x + UltraPro *+ UltraShort Net asset value, at December 31, 2016 $ 33.44 $ 869.63 $ 55.43 $ 25.00 $ 100.00 $ 55.38 Net investment income (loss) (0.05 ) (1.66 ) (0.24 ) (0.21 ) (0.66 ) (0.17 ) Net realized and unrealized gain (loss)# 0.16 (816.30 ) 2.13 12.99 (57.02 ) (9.54 ) Change in net asset value from operations 0.11 (817.96 ) 1.89 12.78 (57.68 ) (9.71 ) Net asset value, at December 31, 2017 $ 33.55 $ 51.67 $ 57.32 $ 37.78 $ 42.32 $ 45.67 Market value per share, at December 31, 2016 † $ 32.09 $ 875.00 $ 55.52 $ 25.00 $ 100.00 $ 55.24 Market value per share, at December 31, 2017 † $ 33.85 $ 51.05 $ 57.45 $ 37.23 $ 42.88 $ 45.72 Total Return, at net asset value 0.3 % (94.1 )% 3.4 % 51.1 % ^ (57.7 )% ^ (17.5 )% Total Return, at market value 5.5 % (94.2 )% 3.5 % 48.9 % ^ (57.1 )% ^ (17.2 )% Ratios to Average Net Assets Expense ratio 0.95 % 1.90 % 0.95 % 1.30 % ** 1.32 % ** 1.02 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % ** 0.95 % ** 0.95 % Net investment income gain (loss) (0.15 )% (1.17 )% (0.41 )% (1.20 )% ** (1.25 )% ** (0.36 )% * + # † ^ ** For the Year Ended December 31, 2017 Per Share Operating UltraShort UltraShort UltraShort UltraShort UltraShort UltraShort Net asset value, at December 31, 2016 $ 31.70 $ 23.10 $ 27.08 $ 91.33 $ 37.31 $ 80.24 Net investment income (loss) (0.06 ) (0.27 ) (0.04 ) (0.13 ) (0.06 ) (0.14 ) Net realized and unrealized gain (loss)# (7.33 ) 16.65 (5.83 ) (20.73 ) (5.54 ) (5.17 ) Change in net asset value from operations (7.39 ) 16.38 (5.87 ) (20.86 ) (5.60 ) (5.31 ) Net asset value, at December 31, 2017 $ 24.31 $ 39.48 $ 21.21 $ 70.47 $ 31.71 $ 74.93 Market value per share, at December 31, 2016 † $ 31.65 $ 23.05 $ 27.08 $ 90.54 $ 38.76 $ 80.25 Market value per share, at December 31, 2017 † $ 24.56 $ 39.65 $ 21.20 $ 69.11 $ 31.40 $ 74.98 Total Return, at net asset value (23.3 )% 70.9 % (21.7 )% (22.8 )% (15.0 )% (6.6 )% Total Return, at market value (22.4 )% 72.0 % (21.7 )% (23.7 )% (19.0 )% (6.6 )% Ratios to Average Net Assets Expense ratio 0.99 % 1.39 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) (0.17 )% (0.81 )% (0.15 )% (0.17 )% (0.18 )% (0.19 )% # † For the Year Ended December 31, 2017 Per Share Operating VIX Mid- VIX Short- Net asset value, at December 31, 2016 $ 42.14 $ 84.86 Net investment income (loss) (0.06 ) (0.07 ) Net realized and unrealized gain (loss)# (20.79 ) (61.45 ) Change in net asset value from operations (20.85 ) (61.52 ) Net asset value, at December 31, 2017 $ 21.29 $ 23.34 Market value per share, at December 31, 2016 † $ 42.34 $ 85.04 Market value per share, at December 31, 2017 † $ 21.15 $ 23.15 Total Return, at net asset value (49.5 )% (72.5 )% Total Return, at market value (50.0 )% (72.8 )% Ratios to Average n Expense ratio 0.91 % 0.96 % Expense ratio, excluding non-recurring 0.85 % 0.85 % Net investment income (loss) (0.22 )% (0.18 )% * # †

Risk

Risk	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Risk	NOTE 8 – RISK Correlation and Compounding Risk The Geared Funds do not seek to achieve their stated investment objective over a period of time greater than a single day (as measured from NAV calculation time to NAV calculation time). The return of a Geared Fund for a period longer than a single day is the result of its return for each day compounded over the period and usually will differ in amount and possibly even direction from one-half the inverse (-0.5x), the inverse (-1x), two times the inverse (-2x), three times the inverse (-3x), one and one-half times (1.5x), two times (2x) or three times of the return (3x) of the Geared Fund’s benchmark for the period. A Geared Fund will lose money if its benchmark performance is flat over time, and it is possible for a Geared Fund to lose money over time even if the performance of its benchmark increases (or decreases in the case of Short, UltraShort and UltraPro Short Funds), as a result of daily rebalancing, the benchmark’s volatility, compounding, and other factors. Compounding is the cumulative effect of applying investment gains and losses and income to the principal amount invested over time. Gains or losses experienced over a given period will increase or reduce the principal amount invested from which the subsequent period’s returns are calculated. The effects of compounding will likely cause the performance of a Geared Fund to differ from the Geared Fund’s stated multiple times the return of its benchmark for the same period. The effect of compounding becomes more pronounced as benchmark volatility and holding period increase. The impact of compounding will impact each shareholder differently depending on the period of time an investment in a Geared Fund is held and the volatility of the benchmark during the holding period of an investment in the Geared Fund. Longer holding periods, higher benchmark volatility, inverse exposure and greater leverage each affect the impact of compounding on a Geared Fund’s returns. Daily compounding of a Geared Fund’s investment returns can dramatically and adversely affect its longer-term performance during periods of high volatility. Volatility may be at least as important to a Geared Fund’s return for a period as the return of the Geared Fund’s underlying benchmark. The Matching VIX Funds seek to achieve their stated investment objective over time. Each Ultra, UltraShort, UltraPro and UltraPro Short Fund uses leverage and should produce daily returns that are more volatile than that of its benchmark. For example, the daily return of an Ultra or UltraPro Fund with a 1.5x or 2x or 3x multiple should be approximately one and one-half (-2x) (-3x) While the Funds seek to meet their investment objectives, there is no guarantee they will do so. Factors that may affect a Fund’s ability to meet its investment objective include: (1) the Sponsor’s ability to purchase and sell Financial Instruments in a manner that correlates to a Fund’s objective; (2) an imperfect correlation between the performance of Financial Instruments held by a Fund and the performance of the applicable benchmark; (3) bid-ask A number of factors may affect a Geared Fund’s ability to achieve a high degree of correlation with its benchmark, and there can be no guarantee that a Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent a Geared Fund from achieving its investment objective. In order to achieve a high degree of correlation with their underlying benchmarks, the Geared Funds seek to rebalance their portfolios daily to keep exposure consistent with their investment objectives. Being materially under- or over-exposed to the benchmark may prevent such Geared Funds from achieving a high degree of correlation with such benchmark. Market disruptions or closure, large amounts of assets into or out of the Geared Funds, regulatory restrictions, extreme market volatility, and other factors will adversely affect such Funds’ ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by the benchmarks’ movements during each day. Because of this, it is unlikely that the Geared Funds will be perfectly exposed (i.e., -0.5x, -1x, -2x, -3x, Each Geared Fund seeks to rebalance its portfolio on a daily basis. The time and manner in which a Geared Fund rebalances its portfolio may vary from day to day depending upon market conditions and other circumstances at the discretion of the Sponsor. Unlike other funds that do not rebalance their portfolios as frequently, each Geared Fund may be subject to increased trading costs associated with daily portfolio rebalancing in order to maintain appropriate exposure to the underlying benchmarks. Counterparty Risk Each Fund may use derivatives such as swap agreements and forward contracts (collectively referred to herein as “derivatives”) in the manner described herein as a means to achieve their respective investment objectives. The use of derivatives by a Fund exposes the Fund to counterparty risks. Regulatory Treatment Derivatives are generally traded in OTC markets and have only recently become subject to comprehensive regulation in the United States. Cash-settled forwards are generally regulated as “swaps”, whereas physically settled forwards are generally not subject to regulation (in the case of commodities other than currencies) or subject to the federal securities laws (in the case of securities). Title VII of the Dodd-Frank Act (“Title VII”) created a regulatory regime for derivatives, with the CFTC responsible for the regulation of swaps and the SEC responsible for the regulation of “security-based swaps.” The SEC requirements have largely yet to be made effective, but the CFTC requirements are largely in place. The CFTC requirements have included rules for some of the types of transactions in which the Funds will engage, including mandatory clearing and exchange trading, reporting, and margin for OTC swaps. Title VII also created new categories of regulated market participants, such as “swap dealers,” “security-based swap dealers,” “major swap participants,” and “major security-based swap participants” who are, or will be, subject to significant new capital, registration, recordkeeping, reporting, disclosure, business conduct and other regulatory requirements. The regulatory requirements under Title VII continue to be developed and there may be further modifications that could materially and adversely impact the Funds, the markets in which a Fund trades and the counterparties with which the Fund engages in transactions. As noted, the CFTC rules may not apply to all of the swap agreements and forward contracts entered into by the Funds. Investors, therefore, may not receive the protection of CFTC regulation or the statutory scheme of the CEA in connection with each Fund’s swap agreements or forward contracts. The lack of regulation in these markets could expose investors to significant losses under certain circumstances, including in the event of trading abuses or financial failure by participants. Counterparty Credit Risk The Funds will be subject to the credit risk of the counterparties to the derivatives. In the case of cleared derivatives, the Funds will have credit risk to the clearing corporation in a similar manner as the Funds would for futures contracts. In the case of OTC derivatives, the Funds will be subject to the credit risk of the counterparty to the transaction – typically a single bank or financial institution. As a result, a Fund is subject to increased credit risk with respect to the amount it expects to receive from counterparties to OTC derivatives entered into as part of that Fund’s principal investment strategy. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, a Fund could suffer significant losses on these contracts and the value of an investor’s investment in a Fund may decline. The Funds have sought to mitigate these risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, subject to certain minimum thresholds. However, there are no limitations on the percentage of assets each Fund may invest in swap agreements or forward contracts with a particular counterparty. To the extent any such collateral is insufficient or there are delays in accessing the collateral, the Funds will be exposed to counterparty risk as described above, including possible delays in recovering amounts as a result of bankruptcy proceedings. The Funds typically enter into transactions only with major global financial institutions. OTC derivatives of the type that may be utilized by the Funds are generally less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty. These agreements contain various conditions, events of default, termination events, covenants and representations. The triggering of certain events or the default on certain terms of the agreement could allow a party to terminate a transaction under the agreement and request immediate payment in an amount equal to the net positions owed to the party under the agreement. For In addition, cleared derivatives benefit from daily marking-to-market The Sponsor regularly reviews the performance of its counterparties for, among other things, creditworthiness and execution quality. In addition, the Sponsor periodically considers the addition of new counterparties and the counterparties used by a Fund may change at any time. Each day, the Funds disclose their portfolio holdings as of the prior Business Day. Each Fund’s portfolio holdings identifies its counterparties, as applicable. This portfolio holdings information may be accessed through the web on the Sponsor’s website at www.ProShares.com. Each counterparty and/or any of its affiliates may be an Authorized Participant or shareholder of a Fund, subject to applicable law. The counterparty risk for cleared derivatives transactions is generally lower than for OTC derivatives. Once a transaction is cleared, the clearing organization is substituted and is a Fund’s counterparty on the derivative. The clearing organization guarantees the performance of the other side of the derivative. Nevertheless, some risk remains, as there is no assurance that the clearing organization, or its members, will satisfy its obligations to a Fund. Leverage Risk The Leveraged Funds may utilize leverage in seeking to achieve their respective investment objectives and will lose more money in market environments adverse to their respective daily investment objectives than funds that do not employ leverage. The use of leveraged and/or inverse leveraged positions increases the risk of total loss of an investor’s investment, even over periods as short as a single day. For example, because the UltraShort Funds and Ultra Funds (except for the Ultra VIX Short-Term Futures ETF which includes a one and one-half (-2x), single-day 50 (-3x) 33 single-day single-day Liquidity Risk Financial Instruments cannot always be liquidated at the desired price. It is difficult to execute a trade at a specific price when there is a relatively small volume of buy and sell orders in a market. A market disruption can also make it difficult to liquidate a position or find a swap or forward contract counterparty at a reasonable cost. Market illiquidity may cause losses for the Funds. The large size of “Contango” and “Backwardation” Risk In Funds that hold futures contracts, as the futures contracts near expiration, they are generally replaced by contracts that have a later expiration. Thus, for example, a contract purchased and held in November 2018 may specify a January 2019 expiration. As that contract nears expiration, it may be replaced by selling the January 2019 contract and purchasing the contract expiring in March 2019. This process is referred to as “rolling.” Rolling may have a positive or negative impact on performance. For example, historically, the prices of certain types of futures contracts have frequently been higher for contracts with shorter-term expirations than for contracts with longer-term expirations, which is referred to as “backwardation.” In these circumstances, absent other factors, the sale of the January 2019 contract would take place at a price that is higher than the price at which the March 2019 contract is purchased, thereby creating a gain in connection with rolling. While certain types of futures contracts have historically exhibited consistent periods of backwardation, backwardation will likely not exist in these markets at all times. The presence of contango (where prices of contracts are higher in the distant delivery months than in the nearer delivery months due to the costs of long-term storage of a physical commodity prior to delivery or other factors) in certain futures contracts at the time of rolling would be expected to adversely affect an Ultra Fund, an UltraPro Fund or a Matching VIX Fund that invests in such futures, and positively affect a Short Fund, an UltraShort Fund or an UltraPro Short Fund that invests in such futures. Similarly, the presence of backwardation in certain futures contracts at the time of rolling such contracts would be expected to adversely affect the Short Funds, UltraShort Funds, and UltraPro Short Funds, and positively affect the Ultra Funds, UltraPro Funds and Matching VIX Funds. Since the introduction of VIX futures contracts, there have frequently been periods where VIX futures prices reflect higher expected volatility levels further out in time. This can result in a loss from “rolling” the VIX futures to maintain the constant weighted average maturity of the applicable VIX Futures Index. Losses from exchanging a lower priced VIX future for a higher priced longer-term future in the rolling process would adversely affect the value of each VIX Futures Index and, accordingly, decrease the return of the Ultra VIX Short-Term Futures ETF and the Matching VIX Funds. Gold and silver have historically exhibited persistent “contango” markets rather than backwardation. Natural gas, like crude oil, moves in and out of backwardation and contango but historically has been in contango most commonly.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	NOTE 9 – SUBSEQUENT EVENTS Management has evaluated the possibility of subsequent events existing in the Trust’s and the Funds’ financial statements through the date the financial statements were issued. Management has determined that there are no material events that would require disclosure in the Trust’s or the Funds’ financial statements through this date.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Use of Estimates & Indemnifications	Use of Estimates & Indemnifications The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the normal course of business, the Trust enters into contracts that contain a variety of representations which provide general indemnifications. The Trust’s maximum exposure under these arrangements cannot be known; however, the Trust expects any risk of loss to be remote.
Basis of Presentation	Basis of Presentation Pursuant to rules and regulations of the SEC, these financial statements are presented for the Trust as a whole, as the SEC registrant, and for each Fund individually. The debts, liabilities, obligations and expenses incurred, contracted for or otherwise existing with respect to a particular Fund shall be enforceable only against the assets of such Fund and not against the assets of the Trust generally or any other Fund. Accordingly, the assets of each Fund of the Trust include only those funds and other assets that are paid to, held by or distributed to the Trust for the purchase of Shares in that Fund.
Statement of Cash Flows	Statement of Cash Flows The cash amount shown in the Statements of Cash Flows is the amount reported as cash in the Statement of Financial Condition dated December 31, 2019 and 2018, and represents cash, segregated cash balances with brokers for futures contracts, segregated cash with brokers for swap agreements, segregated cash with brokers for forward agreements, and segregated cash with brokers for foreign currency forward agreements but does not include short-term investments.
Final Net Asset Value for Fiscal Period	Final Net Asset Value for Fiscal Period The cut-off Fund Create/Redeem Cut-off* NAV Calculation NAV ProShares UltraShort Silver, ProShares Ultra Silver 1:00 p.m. 1:25 p.m. December 31, 2019 ProShares UltraShort Gold, ProShares Ultra Gold 1:00 p.m. 1:30 p.m. December 31, 2019 ProShares UltraShort Bloomberg Crude Oil, ProShares Ultra Bloomberg Crude Oil, 2:00 p.m. 2:30 p.m. December 31, 2019 ProShares UltraPro 3x Short Crude Oil ETF, ProShares UltraPro 3x Crude Oil ETF ProShares UltraShort Bloomberg Natural Gas, ProShares Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 31, 2019 ProShares UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares Short Euro ProShares UltraShort Euro, ProShares Ultra Euro 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares UltraShort Yen, ProShares Ultra Yen 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares VIX Short-Term Futures ETF, ProShares Ultra VIX Short-Term Futures ETF, ProShares Short VIX Short-Term Futures ETF 2:00 p.m. 4:15 p.m. December 31, 2019 ProShares VIX Mid-Term 2:00 p.m. 4:15 p.m. December 31, 2019 * Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the twelve months ended December 31, 2019. Market value per Share is determined at the close of the NYSE Arca and may be later than when the Funds’ NAV per Share is calculated. For financial reporting purposes, the Funds value transactions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements may differ from those used in the calculation of certain of the Funds’ final creation/redemption NAV for the year ended December 31, 2019.
Investment Valuation	Investment Valuation Short-term investments are valued at amortized cost which approximates fair value for daily NAV purposes. For financial reporting purposes, short-term investments are valued at their market price using information provided by a third-party pricing service or market quotations. In each of these situations, valuations are typically categorized as Level I in the fair value hierarchy. Derivatives (e.g., futures contracts, swap agreements, forward agreements and foreign currency forward contracts) are generally valued using independent sources and/or agreements with counterparties or other procedures as determined by the Sponsor. Futures contracts, except for those entered into by the Gold, Silver, Australian Dollar and Short Euro Funds, are generally valued at the last settled price on the applicable exchange on which that future trades. Futures contracts entered into by the Gold, Silver, Australian Dollar and Short Euro Funds are generally valued at the last sales price prior to the time at which the NAV per Share of a Fund is determined. For financial reporting purposes, all futures contracts are generally valued at the last settled price. Futures contracts valuations are typically categorized as Level I in the fair value hierarchy. Swap agreements, forward agreements and foreign currency forward contracts valuations are typically categorized as Level II in the fair value hierarchy. The Sponsor may in its sole discretion choose to determine a fair value price as the basis for determining the market value of such position. Such fair value prices would generally be determined based on available inputs about the current value of the underlying financial instrument or commodity and would be based on principles that the Sponsor deems fair and equitable so long as such principles are consistent with industry standards. The Sponsor may fair value an asset of a Fund pursuant to the policies the Sponsor has adopted. Depending on the source and relevant significance of valuation inputs, these instruments may be classified as Level II or Level III in the fair value hierarchy. Fair value pricing may require subjective determinations about the value of an investment. While the Funds’ policies are intended to result in a calculation of its respective Fund’s NAV that fairly reflects investment values as of the time of pricing, such Fund cannot ensure that fair values determined by the Sponsor or persons acting at their direction would accurately reflect the price that a Fund could obtain for an investment if it were to dispose of that investment as of the time of pricing (for instance, in a forced or distressed sale). The prices used by such Fund may differ from the value that would be realized if the investments were sold and the differences could be material to the financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Funds disclose the fair value of their investments in a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Funds (observable inputs); and (2) the Funds’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements hierarchy are as follows: Level I – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level II – Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market-corroborated inputs). Level III – Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. In some instances, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest input level that is significant to the fair value measurement in its entirety. Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. The following table summarizes the valuation of investments at December 31, 2019 using the fair value hierarchy: Level I - Quoted Prices Level II - Fund Short-Term Futures * Foreign Swap Total ProShares Short Euro $ 745,805 $ (14,000 ) $ — $ — $ 731,805 ProShares Short VIX Short-Term Futures ETF 56,929,436 10,254,872 — — 67,184,308 ProShares Ultra Bloomberg Crude Oil 200,115,463 765,575 — 21,814,590 222,695,628 ProShares Ultra Bloomberg Natural Gas 27,530,314 (2,652,228 ) — — 24,878,086 ProShares Ultra Euro 3,970,412 — 109,997 — 4,080,409 ProShares Ultra Gold 66,177,998 2,248,514 — 5,890,260 74,316,772 ProShares Ultra Silver 135,544,101 5,724,549 — 25,135,898 166,404,548 ProShares Ultra VIX Short-Term Futures ETF 179,749,262 (46,396,781 ) — (209,784 ) 133,142,697 ProShares Ultra Yen 1,808,104 — (10,529 ) — 1,797,575 ProShares UltraPro 3x Crude Oil ETF 47,193,110 7,266,550 — — 54,459,660 ProShares UltraPro 3x Short Crude Oil ETF 57,375,132 (8,358,056 ) — — 49,017,076 ProShares UltraShort Australian Dollar 3,931,474 (224,000 ) — — 3,707,474 ProShares UltraShort Bloomberg Crude Oil 62,199,283 (3,118,689 ) — (4,033,931 ) 55,046,663 ProShares UltraShort Bloomberg Natural Gas 5,154,876 672,329 — — 5,827,205 ProShares UltraShort Euro 78,590,100 — (2,250,420 ) — 76,339,680 ProShares UltraShort Gold 12,355,192 (391,570 ) — (1,172,809 ) 10,790,813 ProShares UltraShort Silver 9,162,867 (82,181 ) — (1,953,904 ) 7,126,782 ProShares UltraShort Yen 25,542,823 — 95,899 — 25,638,722 ProShares VIX Mid-Term 13,980,559 (2,280,825 ) — — 11,699,734 ProShares VIX Short-Term Futures ETF 96,868,817 (15,394,011 ) — — 81,474,806 Total Trust $ 1,084,925,128 $ (51,979,952 ) $ (2,055,053 ) $ 45,470,320 $ 1,076,360,443 * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. The following table summarizes the valuation of investments at December 31, 2018 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Fund Short-Term Futures * Forward Foreign Swap Total ProShares Short Euro $ 599,429 $ (43,281 ) $ — $ — $ — $ 556,148 ProShares Short VIX Short-Term Futures ETF — (14,476,201 ) — — — (14,476,201 ) ProShares Ultra Bloomberg Crude Oil 280,502,900 (14,040,301 ) — — (72,767,125 ) 193,695,474 ProShares Ultra Bloomberg Natural Gas 8,380,427 (10,323,163 ) — — — (1,942,736 ) ProShares Ultra Euro 1,496,658 — — 57,938 — 1,554,596 ProShares Ultra Gold 41,941,734 72,670 4,253,301 — — 46,267,705 ProShares Ultra Silver 123,795,806 340,736 26,301,717 — — 150,438,259 ProShares Ultra VIX Short-Term Futures ETF — 32,503,965 — — (1,330,949 ) 31,173,016 ProShares Ultra Yen — — — 177,111 — 177,111 ProShares UltraPro 3x Crude Oil ETF 20,979,876 (23,451,361 ) — — — (2,471,485 ) ProShares UltraPro 3x Short Crude Oil ETF — 7,019,475 — — — 7,019,475 ProShares UltraShort Australian Dollar 299,537 511,825 — — — 811,362 ProShares UltraShort Bloomberg Crude Oil 27,967,534 3,272,155 — — 20,646,726 51,886,415 ProShares UltraShort Bloomberg Natural Gas 299,714 10,837,989 — — — 11,137,703 ProShares UltraShort Euro 121,801,685 — — (1,495,804 ) — 120,305,881 ProShares UltraShort Gold 3,989,563 (31,780 ) (990,786 ) — — 2,966,997 ProShares UltraShort Silver 3,294,766 (44,917 ) (1,793,011 ) — — 1,456,838 ProShares UltraShort Yen 34,951,229 — — (3,123,744 ) — 31,827,485 ProShares VIX Mid-Term — 3,758,106 — — — 3,758,106 ProShares VIX Short-Term Futures ETF 114,785,002 17,378,445 — — — 132,163,447 Total Trust $ 785,085,860 $ 13,284,362 $ 27,771,221 $ (4,384,499 ) $ (53,451,348 ) $ 768,305,596 * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities.
Investment Transactions and Related Income	Investment Transactions and Related Income Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized appreciation (depreciation) on open contracts are reflected in the Statements of Financial Condition and changes in the unrealized appreciation (depreciation) between periods are reflected in the Statements of Operations. Interest income is recognized on an accrual basis and includes, where applicable, the amortization of premium or discount, and is reflected as Interest Income in the Statement of Operations.
Brokerage Commissions and Fees	Brokerage Commissions and Fees Each Fund pays its respective brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up
Federal Income Tax	Federal Income Tax Each Fund is registered as a series of a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, no Fund expects to incur U.S. federal income tax liability; rather, each beneficial owner of a Fund’s Shares is required to take into account its allocable share of its Fund’s income, gain, loss, deductions and other items for its Fund’s taxable year ending with or within the beneficial owner’s taxable year. Management of the Funds has reviewed all open tax years and major jurisdictions (i.e., the last four tax year ends and the interim tax period since then, as applicable) and concluded that there is no tax liability resulting from unrecognized tax benefits relating to uncertain income tax positions taken or expected to be taken in future tax returns. The Funds are also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months. On an ongoing basis, management monitors its tax positions taken under the interpretation to determine if adjustments to conclusions are necessary based on factors including, but not limited to, on-going

Organization (Tables)

Organization (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Share Splits and Reverse Share Splits	The table below includes Share splits and reverse Share splits for the Funds during the years ended December 31, 2017, 2018, and 2019. There were no Share splits or reverse Share splits for the Funds during the year ended December 31, 2019. The ticker symbols for these Funds did not change, and each Fund continues to trade on the NYSE Arca. Fund Execution Date Type of Split Date Trading ProShares UltraShort Bloomberg Crude Oil January 11, 2017 2-for-1 Share split January 12, 2017 ProShares Ultra Bloomberg Crude Oil January 11, 2017 1-for-2 reverse Share split January 12, 2017 ProShares Ultra VIX Short-Term Futures ETF January 11, 2017 1-for-5 reverse Share split January 12, 2017 ProShares Short VIX Short-Term Futures ETF July 12, 2017 2-for-1 Share split July 17, 2017 ProShares VIX Short-Term Futures ETF July 14, 2017 1-for-4 reverse Share split July 17, 2017 ProShares Ultra VIX Short-Term Futures ETF July 14, 2017 1-for-4 reverse Share split July 17, 2017 ProShares Ultra Bloomberg Natural Gas March 19, 2018 1-for-5 reverse Share split March 20, 2018 ProShares UltraPro 3x Short Crude Oil ETF March 19, 2018 1-for-4 reverse Share split March 20, 2018 ProShares Short VIX Short-Term Futures ETF September 17, 2018 1-for-4 reverse Share split September 18, 2018 ProShares Ultra VIX Short-Term Futures ETF September 17, 2018 1-for-5 reverse Share split September 18, 2018

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Cut-off Times and Times of Calculation of Funds' Final Net Asset Value for Creation and Redemption of Fund Shares	The cut-off Fund Create/Redeem Cut-off* NAV Calculation NAV ProShares UltraShort Silver, ProShares Ultra Silver 1:00 p.m. 1:25 p.m. December 31, 2019 ProShares UltraShort Gold, ProShares Ultra Gold 1:00 p.m. 1:30 p.m. December 31, 2019 ProShares UltraShort Bloomberg Crude Oil, ProShares Ultra Bloomberg Crude Oil, 2:00 p.m. 2:30 p.m. December 31, 2019 ProShares UltraPro 3x Short Crude Oil ETF, ProShares UltraPro 3x Crude Oil ETF ProShares UltraShort Bloomberg Natural Gas, ProShares Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 31, 2019 ProShares UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares Short Euro ProShares UltraShort Euro, ProShares Ultra Euro 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares UltraShort Yen, ProShares Ultra Yen 3:00 p.m. 4:00 p.m. December 31, 2019 ProShares VIX Short-Term Futures ETF, ProShares Ultra VIX Short-Term Futures ETF, ProShares Short VIX Short-Term Futures ETF 2:00 p.m. 4:15 p.m. December 31, 2019 ProShares VIX Mid-Term 2:00 p.m. 4:15 p.m. December 31, 2019 * Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the twelve months ended December 31, 2019.
Valuation of Investments using Fair Value Hierarchy	The following table summarizes the valuation of investments at December 31, 2019 using the fair value hierarchy: Level I - Quoted Prices Level II - Fund Short-Term Futures * Foreign Swap Total ProShares Short Euro $ 745,805 $ (14,000 ) $ — $ — $ 731,805 ProShares Short VIX Short-Term Futures ETF 56,929,436 10,254,872 — — 67,184,308 ProShares Ultra Bloomberg Crude Oil 200,115,463 765,575 — 21,814,590 222,695,628 ProShares Ultra Bloomberg Natural Gas 27,530,314 (2,652,228 ) — — 24,878,086 ProShares Ultra Euro 3,970,412 — 109,997 — 4,080,409 ProShares Ultra Gold 66,177,998 2,248,514 — 5,890,260 74,316,772 ProShares Ultra Silver 135,544,101 5,724,549 — 25,135,898 166,404,548 ProShares Ultra VIX Short-Term Futures ETF 179,749,262 (46,396,781 ) — (209,784 ) 133,142,697 ProShares Ultra Yen 1,808,104 — (10,529 ) — 1,797,575 ProShares UltraPro 3x Crude Oil ETF 47,193,110 7,266,550 — — 54,459,660 ProShares UltraPro 3x Short Crude Oil ETF 57,375,132 (8,358,056 ) — — 49,017,076 ProShares UltraShort Australian Dollar 3,931,474 (224,000 ) — — 3,707,474 ProShares UltraShort Bloomberg Crude Oil 62,199,283 (3,118,689 ) — (4,033,931 ) 55,046,663 ProShares UltraShort Bloomberg Natural Gas 5,154,876 672,329 — — 5,827,205 ProShares UltraShort Euro 78,590,100 — (2,250,420 ) — 76,339,680 ProShares UltraShort Gold 12,355,192 (391,570 ) — (1,172,809 ) 10,790,813 ProShares UltraShort Silver 9,162,867 (82,181 ) — (1,953,904 ) 7,126,782 ProShares UltraShort Yen 25,542,823 — 95,899 — 25,638,722 ProShares VIX Mid-Term 13,980,559 (2,280,825 ) — — 11,699,734 ProShares VIX Short-Term Futures ETF 96,868,817 (15,394,011 ) — — 81,474,806 Total Trust $ 1,084,925,128 $ (51,979,952 ) $ (2,055,053 ) $ 45,470,320 $ 1,076,360,443 * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. The following table summarizes the valuation of investments at December 31, 2018 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Fund Short-Term Futures * Forward Foreign Swap Total ProShares Short Euro $ 599,429 $ (43,281 ) $ — $ — $ — $ 556,148 ProShares Short VIX Short-Term Futures ETF — (14,476,201 ) — — — (14,476,201 ) ProShares Ultra Bloomberg Crude Oil 280,502,900 (14,040,301 ) — — (72,767,125 ) 193,695,474 ProShares Ultra Bloomberg Natural Gas 8,380,427 (10,323,163 ) — — — (1,942,736 ) ProShares Ultra Euro 1,496,658 — — 57,938 — 1,554,596 ProShares Ultra Gold 41,941,734 72,670 4,253,301 — — 46,267,705 ProShares Ultra Silver 123,795,806 340,736 26,301,717 — — 150,438,259 ProShares Ultra VIX Short-Term Futures ETF — 32,503,965 — — (1,330,949 ) 31,173,016 ProShares Ultra Yen — — — 177,111 — 177,111 ProShares UltraPro 3x Crude Oil ETF 20,979,876 (23,451,361 ) — — — (2,471,485 ) ProShares UltraPro 3x Short Crude Oil ETF — 7,019,475 — — — 7,019,475 ProShares UltraShort Australian Dollar 299,537 511,825 — — — 811,362 ProShares UltraShort Bloomberg Crude Oil 27,967,534 3,272,155 — — 20,646,726 51,886,415 ProShares UltraShort Bloomberg Natural Gas 299,714 10,837,989 — — — 11,137,703 ProShares UltraShort Euro 121,801,685 — — (1,495,804 ) — 120,305,881 ProShares UltraShort Gold 3,989,563 (31,780 ) (990,786 ) — — 2,966,997 ProShares UltraShort Silver 3,294,766 (44,917 ) (1,793,011 ) — — 1,456,838 ProShares UltraShort Yen 34,951,229 — — (3,123,744 ) — 31,827,485 ProShares VIX Mid-Term — 3,758,106 — — — 3,758,106 ProShares VIX Short-Term Futures ETF 114,785,002 17,378,445 — — — 132,163,447 Total Trust $ 785,085,860 $ 13,284,362 $ 27,771,221 $ (4,384,499 ) $ (53,451,348 ) $ 768,305,596

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Fair Value of Derivative Instruments	The following tables indicate the location of derivative related items on the Statement of Financial Condition as well as the effect of derivative instruments on the Statement of Operations during the reporting period. Fair Value of Derivative Instruments as of December 31, 2019 Asset Derivatives Liability Derivatives Derivatives Not Accounted for as Hedging Instruments Fund Statements of Unrealized Statements of Unrealized VIX Futures Contracts Receivables on open futures contracts and/or unrealized appreciation on swap agreements Payable on open futures contracts and/or unrealized depreciation on swap agreements ProShares Short VIX Short-Term $ 10,424,889 * $ 170,017 * ProShares Ultra VIX Short-Term — 46,606,565 * ProShares VIX Mid-Term 6,130 * 2,286,955 * ProShares VIX Short-Term — 15,394,011 * Commodities Contracts Receivables on open futures contracts and/or unrealized appreciation on swap agreements Payable on open futures contracts and/or unrealized depreciation on swap agreements ProShares Ultra Bloomberg Crude Oil 22,580,165 * — ProShares Ultra Bloomberg Natural Gas — 2,652,228 * ProShares Ultra Gold 8,138,774 * — ProShares Ultra Silver 30,860,447 * — ProShares UltraPro 3x Crude Oil ETF 7,266,550 * — ProShares UltraPro 3x Short Crude Oil ETF — 8,358,056 * ProShares UltraShort Bloomberg Crude Oil — 7,152,620 * ProShares UltraShort Bloomberg Natural Gas 672,329 * — ProShares UltraShort Gold — 1,564,379 * ProShares UltraShort Silver — 2,036,085 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts ProShares Short Euro — 14,000 * ProShares Ultra Euro 109,997 — ProShares Ultra Yen — 10,529 ProShares UltraShort Australian Dollar — 224,000 * ProShares UltraShort Euro 115,751 2,366,171 ProShares UltraShort Yen 95,899 — Total Trust $ 80,270,931 * $ 88,835,616 * * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. Fair Value of Derivative Instruments as of December 31, 2018 Asset Derivatives Liability Derivatives Derivatives Not Fund Statements of Unrealized Statements of Unrealized VIX Futures Contracts Receivables on open futures contracts, unrealized appreciation on swap agreements Payable on open futures contracts, unrealized depreciation on swap agreements ProShares Short VIX Short-Term $ 910,460 * $ 15,386,661 * ProShares Ultra VIX Short-Term 33,798,582 * 2,625,566 * ProShares VIX Mid-Term 3,888,156 * 130,050 * ProShares VIX Short-Term Futures ETF 18,392,959 * 1,014,514 * Commodities Contracts Receivables on open futures contracts and/or unrealized appreciation on swap agreements Payable on open futures contracts and/or unrealized depreciation on swap agreements ProShares Ultra Bloomberg Crude Oil — 86,807,426 * ProShares Ultra Bloomberg Natural Gas — 10,323,163 * ProShares Ultra Gold 4,325,971 * — ProShares Ultra Silver 26,642,453 * — ProShares UltraPro 3x Crude Oil ETF — 23,451,361 * ProShares UltraPro 3x Short Crude Oil ETF 7,019,475 * — ProShares UltraShort Bloomberg Crude Oil 23,918,881 * — ProShares UltraShort Bloomberg Natural Gas 10,837,989 * — ProShares UltraShort Gold — 1,022,566 * ProShares UltraShort Silver — 1,837,928 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts ProShares Short Euro — 43,281 * ProShares Ultra Euro 61,971 4,033 ProShares Ultra Yen 179,187 2,076 ProShares UltraShort Australian Dollar 511,825 * — ProShares UltraShort Euro 104,074 1,599,878 ProShares UltraShort Yen 678,152 3,801,896 Total Trust $ 131,270,135 * $ 148,050,399 * * Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures.
Effect of Derivative Instruments on Statements of Operations	The Effect of Derivative Instruments on the Statement of Operations Derivatives Not Accounted Location of Gain Fund Realized Gain Change in VIX Futures Contracts Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements ProShares Short VIX Short-Term $ 125,639,084 $ 24,731,073 ProShares Ultra VIX Short-Term (612,858,632 ) (77,779,581 ) ProShares VIX Mid-Term (6,228,652 ) (6,038,931 ) ProShares VIX Short-Term Futures ETF (194,363,991 ) (32,772,456 ) Commodities Contracts Net realized gain (loss) on futures contracts, forward and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts, forward and/or swap agreements ProShares Ultra Bloomberg Crude Oil 144,170,473 109,387,591 ProShares Ultra Bloomberg Natural Gas (32,380,194 ) 7,670,935 ProShares Ultra Gold 19,587,937 3,812,803 ProShares Ultra Silver 34,367,044 4,217,994 ProShares UltraPro 3x Crude Oil ETF 69,170,933 30,717,911 ProShares UltraPro 3x Short Crude Oil ETF (2,410,550 ) (15,377,531 ) ProShares UltraShort Bloomberg Crude Oil (14,251,700 ) (31,071,501 ) ProShares UltraShort Bloomberg Natural Gas 19,286,567 (10,165,660 ) ProShares UltraShort Gold (5,193,260 ) (541,813 ) ProShares UltraShort Silver (4,544,770 ) (198,157 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts ProShares Short Euro 972,479 29,281 ProShares Ultra Euro (722,691 ) 52,059 ProShares Ultra Yen 58,152 (187,640 ) ProShares UltraShort Australian Dollar 833,171 (735,825 ) ProShares UltraShort Euro 13,745,299 (754,616 ) ProShares UltraShort Yen (1,979,140 ) 3,219,643 Total Trust $ (447,102,441 ) $ 8,215,579 The Effect of Derivative Instruments on the Statement of Operations For the year ended December 31, 2018 Derivatives Not Accounted Location of Gain Fund Realized Gain Change in VIX Futures Contracts Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements ProShares Short VIX Short-Term Futures ETF $ (1,885,564,719 ) $ (31,517,650 ) ProShares Ultra VIX Short-Term Futures ETF 390,000,742 65,639,136 ProShares VIX Mid-Term 4,332,654 5,973,386 ProShares VIX Short-Term Futures ETF 89,903,111 22,140,322 Commodities Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/ changes in unrealized appreciation/ depreciation on futures contracts, swap and/ or forward agreements ProShares Ultra Bloomberg Crude Oil 21,756,994 (160,991,766 ) ProShares Ultra Bloomberg Natural Gas 21,092,864 (17,548,973 ) ProShares Ultra Gold (7,345,006 ) 674,136 ProShares Ultra Silver (57,488,526 ) 4,905,519 ProShares UltraPro 3x Crude Oil ETF (37,435,672 ) (24,869,359 ) ProShares UltraPro 3x Short Crude Oil ETF 7,377,281 10,007,630 ProShares UltraShort Bloomberg Crude Oil (42,040,086 ) 58,488,671 ProShares UltraShort Bloomberg Natural Gas (14,147,964 ) 11,935,038 ProShares UltraShort Gold 1,323,579 471,153 ProShares UltraShort Silver 5,024,976 (120,115 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/ or foreign currency forward contracts/ changes in unrealized appreciation (depreciation) on futures and/ or foreign currency forward contracts ProShares Short Euro 459,984 123,007 ProShares Ultra Euro (1,063,823 ) (206,214 ) ProShares Ultra Yen (170,364 ) 211,935 ProShares UltraShort Australian Dollar 128,451 1,405,045 ProShares UltraShort Euro 18,953,455 4,848,465 ProShares UltraShort Yen 2,111,627 (4,651,007 ) Total Trust $ (1,482,790,442 ) $ (53,081,641 ) The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2017 Derivatives Not Accounted Location of Gain (Loss) on Derivatives Fund Realized Gain Change in Unrealized Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts/ changes in unrealized appreciation (depreciation) on futures contracts ProShares Short VIX Short-Term Futures ETF $ 897,400,516 $ 27,351,060 ProShares Ultra VIX Short-Term Futures ETF (1,020,750,851 ) (26,493,883 ) ProShares VIX Mid-Term (25,319,770 ) (927,035 ) ProShares VIX Short-Term Futures ETF (194,005,568 ) (4,293,225 ) Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation (depreciation) on futures contracts, swap and/or forward agreements ProShares Ultra Bloomberg Crude Oil 22,146,212 13,288,604 ProShares Ultra Bloomberg Natural Gas (40,793,265 ) 4,689,090 ProShares Ultra Gold 11,484,410 8,101,902 ProShares Ultra Silver (31,762,834 ) 42,740,483 ProShares UltraPro 3x Crude Oil ETF 6,018,618 1,417,998 ProShares UltraPro 3x Short Crude Oil ETF (7,046,628 ) (2,988,155 ) ProShares UltraShort Bloomberg Crude Oil (6,491,060 ) (20,936,094 ) ProShares UltraShort Bloomberg Natural Gas 4,762,532 (615,018 ) ProShares UltraShort Gold (6,993,557 ) (4,546,265 ) ProShares UltraShort Silver 1,153,393 (3,129,369 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts ProShares Short Euro (1,161,987 ) (299,188 ) ProShares Ultra Euro 2,212,313 838,162 ProShares Ultra Yen (46,195 ) 307,252 ProShares UltraShort Australian Dollar (866,771 ) (2,075,560 ) ProShares UltraShort Euro (39,691,680 ) (22,507,200 ) ProShares UltraShort Yen (8,729,472 ) (15,217,674 ) Total Trust $ (438,481,644 ) $ (5,294,115 )
Offsetting of Financial Assets and Liabilities	The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2019. Fair Values of Derivative Instruments as of December 31, 2019 Assets Liabilities Fund Gross Amounts Gross Amounts Net Amounts of Gross Amounts Gross Amounts Net Amounts of ProShares Ultra Bloomberg Crude Oil Swap agreements $ 21,814,590 $ — $ 21,814,590 $ — $ — $ — ProShares Ultra Euro Foreign currency forward contracts 109,997 — 109,997 — — — ProShares Ultra Gold Swap agreements 5,890,260 — 5,890,260 — — — ProShares Ultra Silver Swap agreements 25,135,898 — 25,135,898 — — — ProShares Ultra VIX Short-Term Futures ETF Swap agreements — — — 209,784 — 209,784 ProShares Ultra Yen Foreign currency forward contracts — — — 10,529 — 10,529 ProShares UltraShort Bloomberg Crude Oil Swap agreements — — — 4,033,931 — 4,033,931 ProShares UltraShort Euro Foreign currency forward contracts 115,751 — 115,751 2,366,171 — 2,366,171 ProShares UltraShort Gold Swap agreements — — — 1,172,809 — 1,172,809 ProShares UltraShort Silver Swap agreements — — — 1,953,904 — 1,953,904 ProShares UltraShort Yen Foreign currency forward contracts 95,899 — 95,899 — — — The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2018: Fair Values of Derivative Instruments as of December 31, 2018 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares Ultra Bloomberg Crude Oil Swap agreements $ — $ — $ — $ 72,767,125 $ — $ 72,767,125 ProShares Ultra Euro Foreign currency forward contracts 61,971 — 61,971 4,033 — 4,033 ProShares Ultra Gold Forward agreements 4,253,301 — 4,253,301 — — — ProShares Ultra Silver Forward agreements 26,301,717 — 26,301,717 — — — ProShares Ultra VIX Short-Term Futures ETF Swap agreements — — — 1,330,949 — 1,330,949 ProShares Ultra Yen Foreign currency forward contracts 179,187 — 179,187 2,076 — 2,076 ProShares UltraShort Bloomberg Crude Oil Swap agreements 20,646,726 — 20,646,726 — — — ProShares UltraShort Euro Foreign currency forward contracts 104,074 — 104,074 1,599,878 — 1,599,878 ProShares UltraShort Gold Forward agreements — — — 990,786 — 990,786 ProShares UltraShort Silver Forward agreements — — — 1,793,011 — 1,793,011 ProShares UltraShort Yen Foreign currency forward contracts 678,152 — 678,152 3,801,896 — 3,801,896
Gross Amounts Not Offset in Statements of Financial Condition	Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2019. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2019 Amounts of Recognized Financial Instruments Cash Collateral for the Net Amount ProShares Ultra Bloomberg Crude Oil Citibank, N.A. $ 6,039,121 $ — $ (6,039,121 ) $ — Goldman Sachs International 4,393,163 (4,393,163 ) — — Royal Bank of Canada 4,210,281 — (4,210,281 ) — Societe Generale 2,253,037 (2,253,037 ) — — UBS AG 4,918,988 (4,918,988 ) — — ProShares Ultra Euro Goldman Sachs International 54,679 — — 54,679 UBS AG 55,318 — — 55,318 ProShares Ultra Gold Citibank, N.A. 2,300,665 — (1,960,000 ) 340,665 Goldman Sachs International 1,681,492 (1,489,073 ) — 192,419 UBS AG 1,908,103 (1,638,362 ) — 269,741 ProShares Ultra Silver Citibank, N.A. 10,329,244 — (10,329,244 ) — Goldman Sachs International 5,925,755 (5,925,755 ) — — UBS AG 8,880,899 (8,880,899 ) — — ProShares Ultra VIX Short-Term Futures ETF Goldman Sachs & Co. (209,784 ) — 209,784 — ProShares Ultra Yen Goldman Sachs International (2,404 ) — 2,404 — UBS AG (8,125 ) — 8,125 — ProShares UltraShort Bloomberg Crude Oil Citibank, N.A. (1,401,797 ) 1,401,797 — — Goldman Sachs International (793,395 ) 793,395 — — Royal Bank of Canada (815,341 ) 815,341 — — Societe Generale (325,459 ) — 325,459 — UBS AG (697,939 ) — 697,939 — ProShares UltraShort Euro Goldman Sachs International (1,134,162 ) 1,134,162 — — UBS AG (1,116,258 ) 1,116,258 — — ProShares UltraShort Gold Citibank, N.A. (534,714 ) 534,714 — — Goldman Sachs International (263,870 ) 263,870 — — UBS AG (374,225 ) — 374,225 — ProShares UltraShort Silver Citibank, N.A. (788,313 ) 788,313 — — Goldman Sachs International (401,324 ) — 401,324 — UBS AG (764,267 ) 764,267 — — ProShares UltraShort Yen Goldman Sachs International 32,828 (32,828 ) — — UBS AG 63,071 (63,071 ) — — Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2018. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2018 Amounts of Recognized Financial Instruments Cash Collateral for the Net Amount ProShares Ultra Bloomberg Crude Oil Citibank, N.A. $ (22,752,565 ) $ 20,667,565 $ 2,085,000 $ — Goldman Sachs International (15,691,687 ) 10,417,687 5,274,000 — Royal Bank of Canada (13,836,386 ) 13,836,386 — — Societe Generale (5,206,589 ) 1,491,589 3,715,000 — UBS AG (15,279,898 ) 15,156,898 123,000 — ProShares Ultra Euro Goldman Sachs International 26,209 — — 26,209 UBS AG 31,729 — — 31,729 ProShares Ultra Gold Citibank, N.A. 1,682,026 (1,682,026 ) — — Goldman Sachs International 1,223,528 (1,223,528 ) — — Societe Generale 61,260 — — 61,260 UBS AG 1,286,487 (1,286,487 ) — — ProShares Ultra Silver Citibank, N.A. 9,662,061 (8,053,860 ) — 1,608,201 Goldman Sachs International 8,418,745 (1,655,971 ) — 6,762,774 Societe Generale 118,797 — — 118,797 UBS AG 8,102,114 (6,971,401 ) — 1,130,713 ProShares Ultra VIX Short-Term Futures ETF Goldman Sachs International (1,330,949 ) — 1,330,949 — ProShares Ultra Yen Goldman Sachs International 73,705 — — 73,705 UBS AG 103,406 — — 103,406 ProShares UltraShort Bloomberg Crude Oil Citibank, N.A. 8,336,367 (8,336,367 ) — — Goldman Sachs International 2,752,372 (2,752,372 ) — — Royal Bank of Canada 4,237,960 — (4,237,960 ) — Societe Generale 1,891,050 (1,891,050 ) — — UBS AG 3,428,977 (3,428,977 ) — — ProShares UltraShort Euro Goldman Sachs International (610,002 ) 610,002 — — UBS AG (885,802 ) — 885,802 — ProShares UltraShort Gold Citibank, N.A. (380,655 ) 119,655 261,000 — Goldman Sachs International (258,134 ) — 258,134 — Societe Generale (63,076 ) — 63,076 — UBS AG (288,921 ) — 288,921 — ProShares UltraShort Silver Citibank, N.A. (566,050 ) — 566,050 — Goldman Sachs International (605,756 ) — 605,756 — Societe Generale (119,953 ) — 119,953 — UBS AG (501,252 ) — 501,252 — ProShares UltraShort Yen Goldman Sachs International (1,425,071 ) — 1,425,071 — UBS AG (1,698,673 ) 1,571,673 127,000 —

Creation and Redemption of Cr_2

Creation and Redemption of Creation Units (Tables)	12 Months Ended
	Dec. 31, 2019
Text Block [Abstract]
Schedule of Transaction Fees	Transaction fees for the for the years ended December 31, 2019, 2018 and 2017 which are included in the Addition and/or Redemption of Shares on the Statements of Changes in Shareholders’ Equity, were as follows: Fund Year Ended Year Ended Year Ended ProShares Short Euro $ — $ — $ — ProShares Short VIX Short-Term Futures ETF 189,274 699,323 1,008,452 ProShares Ultra Bloomberg Crude Oil 57,619 235,966 610,969 ProShares Ultra Bloomberg Natural Gas 5,580 16,562 15,937 ProShares Ultra Euro — — — ProShares Ultra Gold 1,632 10,139 14,460 ProShares Ultra Silver 7,332 26,173 28,622 ProShares Ultra VIX Short-Term Futures ETF 1,925,312 2,194,669 1,036,162 ProShares Ultra Yen — — — ProShares UltraPro 3x Crude Oil ETF 24,934 81,882 25,455 ProShares UltraPro 3x Short Crude Oil ETF 8,919 46,345 14,096 ProShares UltraShort Australian Dollar — — — ProShares UltraShort Bloomberg Crude Oil 27,697 135,524 207,707 ProShares UltraShort Bloomberg Natural Gas 1,378 9,616 4,713 ProShares UltraShort Euro — — — ProShares UltraShort Gold 1,606 10,644 15,945 ProShares UltraShort Silver — — — ProShares UltraShort Yen — — — ProShares VIX Mid-Term 18,415 27,723 13,605 ProShares VIX Short-Term Futures ETF 205,080 160,987 142,380 Total Trust $ 2,474,778 $ 3,655,553 $ 3,138,503

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Per Share Operating Performance	Selected data for a Share outstanding throughout the year ended December 31, 2019: For the Year Ended December 31, 2019 Per Share Operating Short Euro Short VIX Short-Term Ultra Ultra Ultra Euro Ultra Gold Net asset value, at December 31, 2018 $ 43.10 $ 42.36 $ 13.06 $ 25.28 $ 15.09 $ 37.12 Net investment income (loss) 0.55 0.18 0.19 0.07 0.13 0.42 Net realized and unrealized gain (loss)# 1.99 23.08 7.12 (16.95 ) (1.43 ) 11.67 Change in net asset value from operations 2.54 23.26 7.31 (16.88 ) (1.30 ) 12.09 Net asset value, at December 31, 2019 $ 45.64 $ 65.62 $ 20.37 $ 8.40 $ 13.79 $ 49.21 Market value per share, at December 31, 2018 † $ 43.08 $ 42.30 $ 13.30 $ 25.82 $ 15.12 $ 37.41 Market value per share, at December 31, 2019 † $ 45.69 $ 65.23 $ 20.46 $ 8.34 $ 13.77 $ 49.05 Total Return, at net asset value 5.9 % 54.9 % 56.0 % (66.8 )% (8.6 )% 32.6 % Total Return, at market value 6.0 % 54.2 % 53.8 % (67.7 )% (8.9 )% 31.1 % Ratios to Average Net Assets Expense ratio 0.97 % 1.27 %^^ 0.99 % 1.37 % 0.95 % 0.96 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 1.24 % 0.33 % 1.02 % 0.52 % 0.89 % 0.97 % # † ^^ non-recurring 1.16 For the Year Ended December 31, 2019 Per Share Operating Ultra Silver Ultra VIX Short-Term Ultra Yen UltraPro 3x UltraPro 3x UltraShort Net asset value, at December 31, 2018 $ 26.39 $ 81.46 $ 57.53 $ 13.08 $ 49.79 $ 55.30 Net investment income (loss) 0.25 0.01 0.52 0.14 0.05 0.59 Net realized and unrealized gain (loss)# 5.06 (68.80 ) (2.22 ) 8.25 (39.18 ) 0.20 Change in net asset value from operations 5.31 (68.79 ) (1.70 ) 8.39 (39.13 ) 0.79 Net asset value, at December 31, 2019 $ 31.70 $ 12.67 $ 55.83 $ 21.47 $ 10.66 $ 56.09 Market value per share, at December 31, 2018 † $ 26.37 $ 81.73 $ 57.55 $ 13.47 $ 48.43 $ 54.92 Market value per share, at December 31, 2019 † $ 31.65 $ 12.89 $ 55.83 $ 21.60 $ 10.58 $ 55.88 Total Return, at net asset value 20.1 % (84.4 )% (3.0 )% 64.1 % (78.6 )% 1.4 % Total Return, at market value 20.0 % (84.2 )% (3.0 )% 60.4 % (78.2 )% 1.7 % Ratios to Average Net Assets Expense ratio 0.97 % 1.54 %^^ 0.95 % 1.25 % 1.40 % 1.03 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.91 % 0.02 % 0.92 % 0.66 % 0.31 % 1.05 % # † ^^ non-recurring 1.53 For the Year Ended December 31, 2019 Per Share Operating UltraShort UltraShort UltraShort UltraShort UltraShort UltraShort Net asset value, at December 31, 2018 $ 29.79 $ 21.61 $ 24.27 $ 73.28 $ 37.13 $ 73.89 Net investment income (loss) 0.14 0.08 0.29 0.59 0.31 0.87 Net realized and unrealized gain (loss)# (17.74 ) 16.84 2.24 (20.85 ) (10.68 ) 1.61 Change in net asset value from operations (17.60 ) 16.92 2.53 (20.26 ) (10.37 ) 2.48 Net asset value, at December 31, 2019 $ 12.19 $ 38.53 $ 26.80 $ 53.02 $ 26.76 $ 76.37 Market value per share, at December 31, 2018 † $ 29.28 $ 21.22 $ 24.25 $ 72.84 $ 37.10 $ 73.86 Market value per share, at December 31, 2019 † $ 12.15 $ 38.82 $ 26.80 $ 53.21 $ 26.80 $ 76.35 Total Return, at net asset value (59.1 )% 78.3 % 10.4 % (27.6 )% (27.9 )% 3.4 % Total Return, at market value (58.5 )% 82.9 % 10.5 % (26.9 )% (27.8 )% 3.4 % Ratios to Average Net Assets Expense ratio 1.06 % 1.57 % 0.95 % 0.98 % 1.00 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.88 % 0.33 % 1.12 % 0.94 % 0.90 % 1.17 % # † For the Year Ended December 31, 2019 Per Share Operating VIX Mid- Term Futures VIX Short- Net asset value, at December 31, 2018 $ 26.65 $ 38.58 Net investment income (loss) 0.25 0.18 Net realized and unrealized gain (loss)# (5.63 ) (26.46 ) Change in net asset value from operations (5.38 ) (26.28 ) Net asset value, at December 31, 2019 $ 21.27 $ 12.30 Market value per share, at December 31, 2018 † $ 26.74 $ 38.61 Market value per share, at December 31, 2019 † $ 21.29 $ 12.43 Total Return, at net asset value (20.2 )% (68.1 )% Total Return, at market value (20.4 )% (67.8 )% Ratios to Average Net Assets Expense ratio 0.92 % 0.96 % Expense ratio, excluding non-recurring 0.85 % 0.85 % Net investment income gain (loss) 1.10 % 0.90 % # † Selected data for a Share outstanding throughout the year ended December 31, 2018: For the Year Ended December 31, 2018 Per Share Operating Short Euro Short VIX Short-Term * Ultra Ultra * Ultra Euro Ultra Gold Net asset value, at December 31, 2017 $ 39.96 $ 509.20 $ 23.66 $ 32.64 $ 17.44 $ 39.88 Net investment income (loss) 0.22 (0.23 ) 0.20 0.09 0.06 0.28 Net realized and unrealized gain (loss)# 2.92 (466.61 ) (10.80 ) (7.45 ) (2.41 ) (3.04 ) Change in net asset value from operations 3.14 (466.84 ) (10.60 ) (7.36 ) (2.35 ) (2.76 ) Net asset value, at December 31, 2018 $ 43.10 $ 42.36 $ 13.06 $ 25.28 $ 15.09 $ 37.12 Market value per share, at December 31, 2017 † $ 39.99 $ 512.84 $ 23.44 $ 32.50 $ 17.46 $ 40.67 Market value per share, at December 31, 2018 † $ 43.08 $ 42.30 $ 13.30 $ 25.82 $ 15.12 $ 37.41 Total Return, at net asset value 7.9 % (91.7 )% (44.8 )% (22.5 )% (13.5 )% (6.9 )% Total Return, at market value 7.7 % (91.8 )% (43.3 )% (20.6 )% (13.4 )% (8.0 )% Ratios to Average Net Assets Expense ratio 0.97 % 1.34 % 0.97 % 1.22 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.54 % (0.37 )% 0.73 % 0.30 % 0.36 % 0.73 % * # † For the Year Ended December 31, 2018 Per Share Operating Ultra Silver Ultra VIX Short-Term * Ultra Yen UltraPro 3x UltraPro 3x * UltraShort Net asset value, at December 31, 2017 $ 33.55 $ 51.67 $ 57.32 $ 37.78 $ 42.32 $ 45.67 Net investment income (loss) 0.20 (0.40 ) (0.02 ) (0.04 ) (0.12 ) 0.23 Net realized and unrealized gain (loss)# (7.36 ) 30.19 0.23 (24.66 ) 7.59 9.40 Change in net asset value from operations (7.16 ) 29.79 0.21 (24.70 ) 7.47 9.63 Net asset value, at December 31, 2018 $ 26.39 $ 81.46 $ 57.53 $ 13.08 $ 49.79 $ 55.30 Market value per share, at December 31, 2017 † $ 33.85 $ 51.05 $ 57.45 $ 37.23 $ 42.88 $ 45.72 Market value per share, at December 31, 2018 † $ 26.37 $ 81.73 $ 57.55 $ 13.47 $ 48.43 $ 54.92 Total Return, at net asset value (21.3 )% 57.7 % 0.4 % (65.4 )% 17.7 % 21.1 % Total Return, at market value (22.1 )% 60.1 % 0.2 % (63.8 )% 12.9 % 20.1 % Ratios to Average Net Assets Expense ratio 0.95 % 1.68 % 0.95 % 1.22 % 1.24 % 1.03 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.69 % (0.75 )% (0.03 )% (0.12 )% (0.45 )% 0.46 % * # † For the Year Ended December 31, 2018 Per Share Operating UltraShort UltraShort UltraShort UltraShort UltraShort UltraShort Net asset value, at December 31, 2017 $ 24.31 $ 39.48 $ 21.21 $ 70.47 $ 31.71 $ 74.93 Net investment income (loss) 0.11 (0.01 ) 0.16 0.47 0.20 0.53 Net realized and unrealized gain (loss)# 5.37 (17.86 ) 2.90 2.34 5.22 (1.57 ) Change in net asset value from operations 5.48 (17.87 ) 3.06 2.81 5.42 (1.04 ) Net asset value, at December 31, 2018 $ 29.79 $ 21.61 $ 24.27 $ 73.28 $ 37.13 $ 73.89 Market value per share, at December 31, 2017 † $ 24.56 $ 39.65 $ 21.20 $ 69.11 $ 31.40 $ 74.98 Market value per share, at December 31, 2018 † $ 29.28 $ 21.22 $ 24.25 $ 72.84 $ 37.10 $ 73.86 Total Return, at net asset value 22.5 % (45.3 )% 14.4 % 4.0 % 17.1 % (1.4 )% Total Return, at market value 19.2 % (46.5 )% 14.4 % 5.4 % 18.2 % (1.5 )% Ratios to Average Net Assets Expense ratio 0.98 % 1.41 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) 0.59 % (0.05 )% 0.73 % 0.64 % 0.55 % 0.73 % # † For the Year Ended December 31, 2018 Per Share Operating VIX Mid- Term Futures VIX Short- Net asset value, at December 31, 2017 $ 21.29 $ 23.34 Net investment income (loss) 0.10 0.08 Net realized and unrealized gain (loss)# 5.26 15.16 Change in net asset value from operations 5.36 15.24 Net asset value, at December 31, 2018 $ 26.65 $ 38.58 Market value per share, at December 31, 2017 † $ 21.15 $ 23.15 Market value per share, at December 31, 2018 † $ 26.74 $ 38.61 Total Return, at net asset value 25.2 % 65.3 % Total Return, at market value 26.4 % 66.8 % Ratios to Average Net Assets Expense ratio 0.97 % 1.00 % Expense ratio, excluding non-recurring 0.85 % 0.85 % Net investment income gain (loss) 0.45 % 0.30 % # † Selected data for a Share outstanding throughout the year ended December 31, 2017 For the Year Ended December 31, 2017 Per Share Operating Short Euro Short VIX Short-Term * Ultra Ultra * Ultra Euro Ultra Gold Net asset value, at December 31, 2016 $ 45.06 $ 182.46 $ 23.34 $ 94.24 $ 14.02 $ 32.90 Net investment income (loss) (0.14 ) (2.41 ) (0.03 ) (0.23 ) (0.04 ) (0.06 ) Net realized and unrealized gain (loss)# (4.96 ) 329.15 0.35 (61.37 ) 3.46 7.04 Change in net asset value from operations (5.10 ) 326.74 0.32 (61.60 ) 3.42 6.98 Net asset value, at December 31, 2017 $ 39.96 $ 509.20 $ 23.66 $ 32.64 $ 17.44 $ 39.88 Market value per share, at December 31, 2016 † $ 45.12 $ 181.96 $ 23.36 $ 94.80 $ 14.09 $ 33.20 Market value per share, at December 31, 2017 † $ 39.99 $ 512.84 $ 23.44 $ 32.50 $ 17.46 $ 40.67 Total Return, at net asset value (11.3 )% 179.0 % 1.4 % (65.4 )% 24.4 % 21.2 % Total Return, at market value (11.4 )% 181.8 % 0.3 % (65.7 )% 23.9 % 22.5 % Ratios to Average Net Assets Expense ratio 0.97 % 1.51 % 0.98 % 1.22 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) (0.32 )% (0.71 )% (0.18 )% (0.50 )% (0.23 )% (0.14 )% * # † For the Year Ended December 31, 2017 Per Share Operating Ultra Silver Ultra VIX Short-Term Ultra Yen UltraPro 3x + UltraPro *+ UltraShort Net asset value, at December 31, 2016 $ 33.44 $ 869.63 $ 55.43 $ 25.00 $ 100.00 $ 55.38 Net investment income (loss) (0.05 ) (1.66 ) (0.24 ) (0.21 ) (0.66 ) (0.17 ) Net realized and unrealized gain (loss)# 0.16 (816.30 ) 2.13 12.99 (57.02 ) (9.54 ) Change in net asset value from operations 0.11 (817.96 ) 1.89 12.78 (57.68 ) (9.71 ) Net asset value, at December 31, 2017 $ 33.55 $ 51.67 $ 57.32 $ 37.78 $ 42.32 $ 45.67 Market value per share, at December 31, 2016 † $ 32.09 $ 875.00 $ 55.52 $ 25.00 $ 100.00 $ 55.24 Market value per share, at December 31, 2017 † $ 33.85 $ 51.05 $ 57.45 $ 37.23 $ 42.88 $ 45.72 Total Return, at net asset value 0.3 % (94.1 )% 3.4 % 51.1 % ^ (57.7 )% ^ (17.5 )% Total Return, at market value 5.5 % (94.2 )% 3.5 % 48.9 % ^ (57.1 )% ^ (17.2 )% Ratios to Average Net Assets Expense ratio 0.95 % 1.90 % 0.95 % 1.30 % ** 1.32 % ** 1.02 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % ** 0.95 % ** 0.95 % Net investment income gain (loss) (0.15 )% (1.17 )% (0.41 )% (1.20 )% ** (1.25 )% ** (0.36 )% * + # † ^ ** For the Year Ended December 31, 2017 Per Share Operating UltraShort UltraShort UltraShort UltraShort UltraShort UltraShort Net asset value, at December 31, 2016 $ 31.70 $ 23.10 $ 27.08 $ 91.33 $ 37.31 $ 80.24 Net investment income (loss) (0.06 ) (0.27 ) (0.04 ) (0.13 ) (0.06 ) (0.14 ) Net realized and unrealized gain (loss)# (7.33 ) 16.65 (5.83 ) (20.73 ) (5.54 ) (5.17 ) Change in net asset value from operations (7.39 ) 16.38 (5.87 ) (20.86 ) (5.60 ) (5.31 ) Net asset value, at December 31, 2017 $ 24.31 $ 39.48 $ 21.21 $ 70.47 $ 31.71 $ 74.93 Market value per share, at December 31, 2016 † $ 31.65 $ 23.05 $ 27.08 $ 90.54 $ 38.76 $ 80.25 Market value per share, at December 31, 2017 † $ 24.56 $ 39.65 $ 21.20 $ 69.11 $ 31.40 $ 74.98 Total Return, at net asset value (23.3 )% 70.9 % (21.7 )% (22.8 )% (15.0 )% (6.6 )% Total Return, at market value (22.4 )% 72.0 % (21.7 )% (23.7 )% (19.0 )% (6.6 )% Ratios to Average Net Assets Expense ratio 0.99 % 1.39 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding non-recurring 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income gain (loss) (0.17 )% (0.81 )% (0.15 )% (0.17 )% (0.18 )% (0.19 )% # † For the Year Ended December 31, 2017 Per Share Operating VIX Mid- VIX Short- Net asset value, at December 31, 2016 $ 42.14 $ 84.86 Net investment income (loss) (0.06 ) (0.07 ) Net realized and unrealized gain (loss)# (20.79 ) (61.45 ) Change in net asset value from operations (20.85 ) (61.52 ) Net asset value, at December 31, 2017 $ 21.29 $ 23.34 Market value per share, at December 31, 2016 † $ 42.34 $ 85.04 Market value per share, at December 31, 2017 † $ 21.15 $ 23.15 Total Return, at net asset value (49.5 )% (72.5 )% Total Return, at market value (50.0 )% (72.8 )% Ratios to Average n Expense ratio 0.91 % 0.96 % Expense ratio, excluding non-recurring 0.85 % 0.85 % Net investment income (loss) (0.22 )% (0.18 )% * # †

Schedule of Investments - Short

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)		Dec. 31, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		$ 1,084,925,128	$ 785,085,860
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		745,805	599,429
ProShares Short Euro [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	365,000
Short-term U.S. government and agency obligations, value	[1]	364,469
ProShares Short Euro [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	382,000
Short-term U.S. government and agency obligations, value	[1]	381,336
ProShares Short Euro [Member] | U.S. Treasury Bills 1.976% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		200,000
Short-term U.S. government and agency obligations, value	[1]		199,633
ProShares Short Euro [Member] | U.S.Treasury Bills 1.689% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		200,000
Short-term U.S. government and agency obligations, value	[1]		199,988
ProShares Short Euro [Member] | U.S. Treasury Bills 1.941% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		200,000
Short-term U.S. government and agency obligations, value	[1]		199,808
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		56,929,436
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	42,000,000
Short-term U.S. government and agency obligations, value	[1]	41,951,238
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	15,000,000
Short-term U.S. government and agency obligations, value	[1]	14,978,198
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		200,115,463	280,502,900
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.609% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	39,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	38,989,536
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	57,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	56,933,823
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	50,952,000
Short-term U.S. government and agency obligations, value	[1]	50,877,941
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.587% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	53,407,000
Short-term U.S. government and agency obligations, value	[1],[2]	53,314,163
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		15,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		14,999,078
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.287% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		91,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		90,912,794
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.260% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		90,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		89,834,697
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.400% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		85,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		84,756,331
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		27,530,314	8,380,427
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.635% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		800,000
Short-term U.S. government and agency obligations, value	[1]		799,951
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		700,000
Short-term U.S. government and agency obligations, value	[1]		699,329
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		900,000
Short-term U.S. government and agency obligations, value	[1]		898,347
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 2.362% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		6,000,000
Short-term U.S. government and agency obligations, value	[1]		5,982,800
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	6,000,000
Short-term U.S. government and agency obligations, value	[1]	5,998,390
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	5,500,000
Short-term U.S. government and agency obligations, value	[1]	5,493,615
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	7,843,000
Short-term U.S. government and agency obligations, value	[1]	7,831,600
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	8,221,000
Short-term U.S. government and agency obligations, value	[1]	8,206,709
ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		3,970,412	1,496,658
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.635% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		200,000
Short-term U.S. government and agency obligations, value	[1]		199,988
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		100,000
Short-term U.S. government and agency obligations, value	[1]		99,904
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		200,000
Short-term U.S. government and agency obligations, value	[1]		199,633
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,000,000
Short-term U.S. government and agency obligations, value	[1]	999,732
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,000,000
Short-term U.S. government and agency obligations, value	[1]	998,839
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	964,000
Short-term U.S. government and agency obligations, value	[1]	962,599
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,011,000
Short-term U.S. government and agency obligations, value	[1]	1,009,242
ProShares Ultra Euro [Member] | U.S. Treasury Bills 2.427% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		1,000,000
Short-term U.S. government and agency obligations, value	[1]		997,133
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		66,177,998	41,941,734
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	14,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	13,996,244
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	19,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	18,977,940
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	16,237,000
Short-term U.S. government and agency obligations, value	[1]	16,213,400
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	17,020,000
Short-term U.S. government and agency obligations, value	[1]	16,990,414
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		2,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		1,999,877
ProShares Ultra Gold [Member] | U.S. Treasury Bills 2.307% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		28,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		27,973,167
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.898% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		3,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		2,994,490
ProShares Ultra Gold [Member] | U.S. Treasury Bills 2.349% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		9,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		8,974,200
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		135,544,101	123,795,806
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	29,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	28,992,219
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	40,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	39,953,560
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	32,568,000
Short-term U.S. government and agency obligations, value	[1]	32,520,662
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	34,137,000
Short-term U.S. government and agency obligations, value	[1]	34,077,660
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		8,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		7,999,508
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.285% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		47,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		46,954,960
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.241% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		38,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		37,930,206
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.364% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		31,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		30,911,132
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		179,749,262
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]	83,000,000
Short-term U.S. government and agency obligations, value	[1],[4]	82,903,637
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]	50,000,000
Short-term U.S. government and agency obligations, value	[1],[4]	49,927,325
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.618% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]	47,000,000
Short-term U.S. government and agency obligations, value	[1],[4]	46,918,300
Proshares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		1,808,104
Proshares Ultra Yen [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	884,000
Short-term U.S. government and agency obligations, value	[1]	882,715
Proshares Ultra Yen [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	927,000
Short-term U.S. government and agency obligations, value	[1]	925,389
Proshares UltraPro 3X Crude Oil ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		47,193,110	20,979,876
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	9,000,000
Short-term U.S. government and agency obligations, value	[1]	8,997,585
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	13,000,000
Short-term U.S. government and agency obligations, value	[1]	12,984,908
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	12,328,000
Short-term U.S. government and agency obligations, value	[1]	12,310,081
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	12,923,000
Short-term U.S. government and agency obligations, value	[1]	12,900,536
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 2.342% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		21,000,000
Short-term U.S. government and agency obligations, value	[1]		20,979,876
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		57,375,132
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	13,000,000
Short-term U.S. government and agency obligations, value	[1]	12,996,512
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	13,000,000
Short-term U.S. government and agency obligations, value	[1]	12,984,907
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	15,352,000
Short-term U.S. government and agency obligations, value	[1]	15,329,686
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	16,092,000
Short-term U.S. government and agency obligations, value	[1]	16,064,027
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		3,931,474	299,537
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		100,000
Short-term U.S. government and agency obligations, value	[1]		99,904
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		200,000
Short-term U.S. government and agency obligations, value	[1]		199,633
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,000,000
Short-term U.S. government and agency obligations, value	[1]	999,732
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,000,000
Short-term U.S. government and agency obligations, value	[1]	998,839
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	945,000
Short-term U.S. government and agency obligations, value	[1]	943,626
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	991,000
Short-term U.S. government and agency obligations, value	[1]	989,277
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		62,199,283	27,967,534
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	13,000,000
Short-term U.S. government and agency obligations, value	[1]	12,996,512
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	15,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	14,982,585
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	16,734,000
Short-term U.S. government and agency obligations, value	[1]	16,709,677
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	17,541,000
Short-term U.S. government and agency obligations, value	[1],[2]	17,510,509
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		5,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		4,999,692
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.212% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		15,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		14,985,625
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.898% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		5,000,000
Short-term U.S. government and agency obligations, value	[1],[2]		4,990,817
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.427% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		3,000,000
Short-term U.S. government and agency obligations, value	[1]		2,991,400
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		5,154,876	299,714
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.635% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		100,000
Short-term U.S. government and agency obligations, value	[1]		99,994
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		100,000
Short-term U.S. government and agency obligations, value	[1]		99,904
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		100,000
Short-term U.S. government and agency obligations, value	[1]		99,816
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.629% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,600,000
Short-term U.S. government and agency obligations, value	[1]	1,599,571
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,739,000
Short-term U.S. government and agency obligations, value	[1]	1,736,472
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	1,822,000
Short-term U.S. government and agency obligations, value	[1]	1,818,833
ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		78,590,100	121,801,685
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	16,000,000
Short-term U.S. government and agency obligations, value	[1]	15,995,707
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]	22,000,000
Short-term U.S. government and agency obligations, value	[1],[5]	21,974,458
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	19,864,000
Short-term U.S. government and agency obligations, value	[1]	19,835,128
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]	20,821,000
Short-term U.S. government and agency obligations, value	[1],[5]	20,784,807
ProShares UltraShort Euro [Member] | U.S.Treasury Bills 1.689% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		6,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		5,999,631
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.305% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		43,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		42,958,793
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.297% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		51,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		50,906,328
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.363% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		22,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		21,936,933
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		12,355,192	3,989,563
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	2,000,000
Short-term U.S. government and agency obligations, value	[1]	1,999,463
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	3,000,000
Short-term U.S. government and agency obligations, value	[1],[2]	2,996,517
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	3,599,000
Short-term U.S. government and agency obligations, value	[1]	3,593,769
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	3,772,000
Short-term U.S. government and agency obligations, value	[1],[2]	3,765,443
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.885% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		1,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		998,163
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 2.349% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		3,000,000
Short-term U.S. government and agency obligations, value	[1],[3]		2,991,400
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		9,162,867	3,294,766
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	2,000,000
Short-term U.S. government and agency obligations, value	[1]	1,999,463
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	2,000,000
Short-term U.S. government and agency obligations, value	[1]	1,997,678
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.564% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	2,526,000
Short-term U.S. government and agency obligations, value	[1],[2]	2,522,329
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.565% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	2,648,000
Short-term U.S. government and agency obligations, value	[1],[2]	2,643,397
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		700,000
Short-term U.S. government and agency obligations, value	[1]		699,957
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.856% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		700,000
Short-term U.S. government and agency obligations, value	[1]		699,329
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.898% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[3]		900,000
Short-term U.S. government and agency obligations, value	[1],[3]		898,347
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 2.427% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		1,000,000
Short-term U.S. government and agency obligations, value	[1]		997,133
ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		25,542,823	34,951,229
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	5,000,000
Short-term U.S. government and agency obligations, value	[1]	4,998,658
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]	7,000,000
Short-term U.S. government and agency obligations, value	[1],[5]	6,991,873
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	6,627,000
Short-term U.S. government and agency obligations, value	[1]	6,617,368
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	6,947,000
Short-term U.S. government and agency obligations, value	[1]	6,934,924
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 2.307% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		23,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		22,977,959
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.976% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		2,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		1,996,327
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 2.349% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		8,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		7,977,066
ProShares UltraShort Yen [Member] | U.S.Treasury Bills 1.689% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[5]		2,000,000
Short-term U.S. government and agency obligations, value	[1],[5]		1,999,877
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		13,980,559
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	7,000,000
Short-term U.S. government and agency obligations, value	[1]	6,991,873
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]	3,000,000
Short-term U.S. government and agency obligations, value	[1],[4]	2,995,639
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 1.618% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	4,000,000
Short-term U.S. government and agency obligations, value	[1]	3,993,047
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations, value		96,868,817	114,785,002
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	53,000,000
Short-term U.S. government and agency obligations, value	[1]	52,938,467
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]	24,000,000
Short-term U.S. government and agency obligations, value	[1],[4]	23,965,116
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.618% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]	20,000,000
Short-term U.S. government and agency obligations, value	[1]	$ 19,965,234
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 2.314% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]		50,000,000
Short-term U.S. government and agency obligations, value	[1],[4]		49,952,085
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 2.326% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[4]		40,000,000
Short-term U.S. government and agency obligations, value	[1],[4]		39,926,532
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 2.389% due 02/28/19 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1]		25,000,000
Short-term U.S. government and agency obligations, value	[1]		$ 24,906,385
[1]	Rates shown represent discount rate at the time of purchase.
[2]	All or partial amount pledged as collateral for swap agreements.
[3]	All or partial amount pledged as collateral for forward agreements.
[4]	All or partial amount pledged as collateral for futures contracts.
[5]	All or partial amount pledged as collateral for foreign currency forward contracts.

Schedule of Investments - Sho_2

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, cost	$ 1,084,860,512	$ 785,069,552
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	33.00%	7.00%
Total short-term U.S. government and agency obligations, cost	$ 745,775	$ 599,431
ProShares Short Euro [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Short Euro [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Short Euro [Member] | U.S.Treasury Bills 1.689% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.689%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares Short Euro [Member] | U.S. Treasury Bills 1.976% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.976%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares Short Euro [Member] | U.S. Treasury Bills 1.941% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.941%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	20.00%
Total short-term U.S. government and agency obligations, cost	$ 56,926,750	$ 0
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.462%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	65.00%	76.00%
Total short-term U.S. government and agency obligations, cost	$ 200,101,525	$ 280,497,709
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.609% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.609%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.587% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.587%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.607%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.287% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.287%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.260% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.26%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.400% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.40%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	61.00%	57.00%
Total short-term U.S. government and agency obligations, cost	$ 27,528,924	$ 8,380,716
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.635% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.635%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.884%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.924%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 2.362% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.362%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	64.00%	20.00%
Total short-term U.S. government and agency obligations, cost	$ 3,970,204	$ 1,496,665
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Ultra Euro [Member] | U.S. Treasury Bills 2.427% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.427%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.635% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.635%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.884%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.924%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	60.00%	50.00%
Total short-term U.S. government and agency obligations, cost	$ 66,174,584	$ 41,941,207
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Ultra Gold [Member] | U.S. Treasury Bills 2.307% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.307%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares Ultra Gold [Member] | U.S. Treasury Bills 2.349% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.349%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.607%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.898% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.898%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	57.00%	61.00%
Total short-term U.S. government and agency obligations, cost	$ 135,537,081	$ 123,793,893
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.607%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.285% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.285%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.241% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.241%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.364% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.364%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	34.00%
Total short-term U.S. government and agency obligations, cost	$ 179,736,532
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.462%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.618% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.618%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	32.00%
Total short-term U.S. government and agency obligations, cost	$ 1,808,030
ProShares Ultra Yen [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares Ultra Yen [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
Proshares UltraPro 3X Crude Oil ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	67.00%	24.00%
Total short-term U.S. government and agency obligations, cost	$ 47,190,714	$ 20,979,000
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
Proshares UltraPro 3X Crude Oil ETF [Member] | U.S. Treasury Bills 2.342% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.342%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	63.00%
Total short-term U.S. government and agency obligations, cost	$ 57,372,196
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraPro 3X Short Crude Oil ETF [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	70.00%	3.00%
Total short-term U.S. government and agency obligations, cost	$ 3,931,268	$ 299,548
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.884%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.924%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	50.00%	24.00%
Total short-term U.S. government and agency obligations, cost	$ 62,196,121	$ 27,967,127
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.607%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.212% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.212%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.898% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.898%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.427% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.427%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	41.00%	2.00%
Total short-term U.S. government and agency obligations, cost	$ 5,154,603	$ 299,715
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.629% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.629%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.635% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.635%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.884% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.884%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.924% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.924%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	65.00%	79.00%
Total short-term U.S. government and agency obligations, cost	$ 78,586,073	$ 121,798,837
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Euro [Member] | U.S.Treasury Bills 1.689% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.689%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.305% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.305%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.297% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.297%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.363% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.363%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	59.00%	22.00%
Total short-term U.S. government and agency obligations, cost	$ 12,354,582	$ 3,989,775
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 2.349% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.349%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.885% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.885%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	66.00%	28.00%
Total short-term U.S. government and agency obligations, cost	$ 9,162,163	$ 3,294,789
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.607% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.607%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.856% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.856%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.898% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.898%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 2.427% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.427%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.564% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.564%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.565% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.565%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	67.00%	63.00%
Total short-term U.S. government and agency obligations, cost	$ 25,541,523	$ 34,950,807
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.607% due 01/09/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.607%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 9, 2020
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.514% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.514%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.519% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.519%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares UltraShort Yen [Member] | U.S.Treasury Bills 1.689% due 01/03/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.689%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 3, 2019
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 2.307% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.307%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.976% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		1.976%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 2.349% due 02/14/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.349%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 14, 2019
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	30.00%
Total short-term U.S. government and agency obligations, cost	$ 13,979,509
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.462%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 1.618% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.618%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	35.00%	77.00%
Total short-term U.S. government and agency obligations, cost	$ 96,862,355	$ 114,780,333
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.547% due 01/30/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.547%
Discount rate at the time of purchase	true
Investment, maturity date	Jan. 30, 2020
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.462% due 02/06/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.462%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 6, 2020
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 1.618% due 02/13/20 [Member]
Schedule of Investments [Line Items]
Interest rate	1.618%
Discount rate at the time of purchase	true
Investment, maturity date	Feb. 13, 2020
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 2.314% due 01/17/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.314%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 17, 2019
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 2.326% due 01/31/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.326%
Discount rate at the time of purchase		true
Investment, maturity date		Jan. 31, 2019
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 2.389% due 02/28/19 [Member]
Schedule of Investments [Line Items]
Interest rate		2.389%
Discount rate at the time of purchase		true
Investment, maturity date		Feb. 28, 2019

Schedule of Investments - Futur

Schedule of Investments - Futures Contracts Sold (Detail) - Futures Contracts [Member] - Contracts to Sell [Member]	Dec. 31, 2019USD ($)Contract	Dec. 31, 2018USD ($)Contract
ProShares Short Euro [Member] | Euro Fx Currency Futures - CME, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		60
Notional Amount at Value		$ 8,641,875
Unrealized Appreciation (Depreciation)		(43,281)
ProShares Short Euro [Member] | Euro Fx Currency Futures - CME, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	16
Notional Amount at Value	$ 2,256,400
Unrealized Appreciation (Depreciation)	(14,000)
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)	$ 10,254,872	$ (14,476,201)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	5,442
Notional Amount at Value	$ 79,589,250
Unrealized Appreciation (Depreciation)	$ 10,424,889
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	3,764
Notional Amount at Value	$ 62,576,500
Unrealized Appreciation (Depreciation)	$ (170,017)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		4,103
Notional Amount at Value		$ 99,190,025
Unrealized Appreciation (Depreciation)		$ (15,386,661)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		3,282
Notional Amount at Value		$ 73,106,550
Unrealized Appreciation (Depreciation)		910,460
ProShares UltraPro 3X Short Crude Oil ETF [Member] | WTI Crude Oil - NYMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	4,511
Notional Amount at Value	$ 274,133,470
Unrealized Appreciation (Depreciation)	$ (8,358,056)
ProShares UltraPro 3X Short Crude Oil ETF [Member] | WTI Crude Oil - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 7,019,475
ProShares UltraPro 3X Short Crude Oil ETF [Member] | WTI Crude Oil - NYMEX, expires November 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		1,225
Notional Amount at Value		$ 56,007,000
ProShares UltraShort Australian Dollar [Member] | Australian Dollar Fx Currency Futures CME expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	160
Notional Amount at Value	$ 11,260,800
Unrealized Appreciation (Depreciation)	$ (224,000)
ProShares UltraShort Australian Dollar [Member] | Australian Dollar Fx Currency Futures CME expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		315
Notional Amount at Value		$ 22,213,800
Unrealized Appreciation (Depreciation)		$ 511,825
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,864
Notional Amount at Value	$ 113,275,280
Unrealized Appreciation (Depreciation)	$ (3,118,689)
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		641
Notional Amount at Value		$ 29,306,520
Unrealized Appreciation (Depreciation)		$ 3,272,155
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,160
Notional Amount at Value	$ 25,032,800
Unrealized Appreciation (Depreciation)	$ 672,329
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		1,250
Notional Amount at Value		$ 35,637,500
Unrealized Appreciation (Depreciation)		$ 10,837,989
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, expires February 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	76
Notional Amount at Value	$ 11,575,560
Unrealized Appreciation (Depreciation)	$ (391,570)
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, expires February 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		10
Notional Amount at Value		$ 1,281,300
Unrealized Appreciation (Depreciation)		$ (31,780)
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	27
Notional Amount at Value	$ 2,419,335
Unrealized Appreciation (Depreciation)	$ (82,181)
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		11
Notional Amount at Value		$ 854,700
Unrealized Appreciation (Depreciation)		$ (44,917)

Schedule of Investments - Fut_2

Schedule of Investments - Futures Contracts Purchased (Detail) - Futures Contracts [Member] - Contracts to Purchase [Member]	Dec. 31, 2019USD ($)Contract	Dec. 31, 2018USD ($)Contract
ProShares Ultra Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	554
Notional Amount at Value	$ 33,666,580
Total Unrealized (Depreciation)	$ 765,575
ProShares Ultra Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		3,121
Notional Amount at Value		$ 142,692,120
Total Unrealized (Depreciation)		$ (14,040,301)
ProShares Ultra Bloomberg Natural Gas [Member] | WTI Crude Oil - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		1,025
Notional Amount at Value		$ 29,222,750
ProShares Ultra Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	4,185
Notional Amount at Value	$ 90,312,300
Total Unrealized (Depreciation)	$ (2,652,228)
ProShares Ultra Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)		$ (10,323,163)
ProShares Ultra Gold [Member] | Gold Futures - COMEX, expires February 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	438
Notional Amount at Value	$ 66,711,780
Total Unrealized (Depreciation)	$ 2,248,514
ProShares Ultra Gold [Member] | Gold Futures - COMEX, expires February 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		47
Notional Amount at Value		$ 6,022,110
Total Unrealized (Depreciation)		$ 72,670
ProShares Ultra Silver [Member] | Silver Futures - COMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,316
Notional Amount at Value	$ 117,920,180
Total Unrealized (Depreciation)	5,724,549
ProShares Ultra Silver [Member] | Silver Futures - COMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		129
Notional Amount at Value		$ 10,023,300
Total Unrealized (Depreciation)		340,736
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ (46,396,781)	$ 32,503,965
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	29,402
Notional Amount at Value	$ 430,004,250
Total Unrealized (Depreciation)	$ (44,377,309)
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	20,358
Notional Amount at Value	$ 338,451,750
Total Unrealized (Depreciation)	$ (2,019,472)
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		5,932
Notional Amount at Value		$ 143,406,100
Total Unrealized (Depreciation)		$ 33,798,582
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		4,746
Notional Amount at Value		$ 105,717,150
Total Unrealized (Depreciation)		$ (1,294,617)
Proshares UltraPro 3X Crude Oil ETF [Member] | WTI Crude Oil - NYMEX, expires March 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		5,751
Notional Amount at Value		$ 262,935,720
Total Unrealized (Depreciation)		(23,451,361)
Proshares UltraPro 3X Crude Oil ETF [Member] | Natural Gas - NYMEX, expires March 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	3,498
Notional Amount at Value	$ 212,573,460
Total Unrealized (Depreciation)	7,266,550
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ (2,280,825)	$ 3,758,106
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires April 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	511
Notional Amount at Value	$ 8,904,175
Total Unrealized (Depreciation)	$ (863,150)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires May 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	865
Notional Amount at Value	$ 15,202,375
Total Unrealized (Depreciation)	$ (874,085)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires June 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	865
Notional Amount at Value	$ 15,461,875
Total Unrealized (Depreciation)	$ (549,720)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires July 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	354
Notional Amount at Value	$ 6,416,250
Total Unrealized (Depreciation)	6,130
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires April 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		503
Notional Amount at Value		$ 10,550,425
Total Unrealized (Depreciation)		$ 1,677,781
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires May 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		906
Notional Amount at Value		$ 18,799,500
Total Unrealized (Depreciation)		$ 1,368,915
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires June 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		906
Notional Amount at Value		$ 18,618,300
Total Unrealized (Depreciation)		$ 841,460
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, expires July 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		403
Notional Amount at Value		$ 8,332,025
Total Unrealized (Depreciation)		(130,050)
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ (15,394,011)	$ 17,378,445
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	10,706
Notional Amount at Value	$ 156,575,250
Total Unrealized (Depreciation)	$ (15,238,139)
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2020 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	7,415
Notional Amount at Value	$ 123,274,375
Total Unrealized (Depreciation)	$ (155,872)
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires January 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		3,561
Notional Amount at Value		$ 86,087,175
Total Unrealized (Depreciation)		$ 18,392,959
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, expires February 2019 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract		2,849
Notional Amount at Value		$ 63,461,475
Total Unrealized (Depreciation)		$ (1,014,514)

Schedule of Investments - Total

Schedule of Investments - Total Return Swap Agreements (Detail) - Swap Agreements [Member] - USD ($)		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 21,814,590		$ (72,767,125)
ProShares Ultra Bloomberg Crude Oil [Member] | Citibank N.A. [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.18%		0.18%
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1],[3]	$ 172,174,920		$ 192,061,821
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 6,039,121		$ (22,752,565)
ProShares Ultra Bloomberg Crude Oil [Member] | Goldman Sachs International [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%		0.25%
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1],[3]	$ 120,411,487		$ 112,179,333
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 4,393,163		$ (15,691,687)
ProShares Ultra Bloomberg Crude Oil [Member] | Royal Bank of Canada [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.23%		0.23%
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1],[3]	$ 115,540,626		$ 113,997,533
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 4,210,281		$ (13,836,386)
ProShares Ultra Bloomberg Crude Oil [Member] | Societe Generale [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%		0.25%
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1],[3]	$ 64,308,537		$ 38,382,074
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 2,253,037		$ (5,206,589)
ProShares Ultra Bloomberg Crude Oil [Member] | UBS AG [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%		0.25%
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1],[3]	$ 113,574,303		$ 137,242,162
Unrealized Appreciation (Depreciation)/ Value	[1]	4,918,988		(15,279,898)
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 5,890,260
ProShares Ultra Gold [Member] | Citibank N.A. [Member] | Gold Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ 60,437,683
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 2,300,665
ProShares Ultra Gold [Member] | Goldman Sachs International [Member] | Gold Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ 44,172,192
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 1,681,492
ProShares Ultra Gold [Member] | UBS AG [Member] | Gold Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ 50,125,199
Unrealized Appreciation (Depreciation)/ Value	[1]	1,908,103
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 25,135,898
ProShares Ultra Silver [Member] | Citibank N.A. [Member] | Silver Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ 152,640,569
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 10,329,244
ProShares Ultra Silver [Member] | Goldman Sachs International [Member] | Silver Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.30%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ 83,225,484
Unrealized Appreciation (Depreciation)/ Value	[1]	$ 5,925,755
ProShares Ultra Silver [Member] | UBS AG [Member] | Silver Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ 124,680,616
Unrealized Appreciation (Depreciation)/ Value	[1]	8,880,899
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value		$ (209,784)	[1]	$ (1,330,949)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Goldman Sachs & Co. [Member] | International Based On iPath Series B S And P 500 VIX Short-Term Futures ETN iNAV Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		2.61%	[1],[2]	2.51%	[4],[5]
Termination Date		Jan. 29, 2020	[1]	Jan. 26, 2019	[5]
Notional Amount at Value	[3]	$ 23,078,793	[1]	$ 72,301,516	[5]
Unrealized Appreciation (Depreciation)/ Value		(209,784)	[1]	(1,330,949)
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (4,033,931)		$ 20,646,726
ProShares UltraShort Bloomberg Crude Oil [Member] | Citibank N.A. [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1]	0.18%		0.18%	[2]
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1]	$ (39,727,981)		$ (67,986,223)	[3]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (1,401,797)		$ 8,336,367
ProShares UltraShort Bloomberg Crude Oil [Member] | Goldman Sachs International [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1]	0.25%		0.25%	[2]
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1]	$ (37,407,865)		$ (43,744,157)	[3]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (793,395)		$ 2,752,372
ProShares UltraShort Bloomberg Crude Oil [Member] | Royal Bank of Canada [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1]	0.23%		0.23%	[2]
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1]	$ (31,487,418)		$ (31,327,722)	[3]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (815,341)		$ 4,237,960
ProShares UltraShort Bloomberg Crude Oil [Member] | Societe Generale [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1]	0.25%		0.25%	[2]
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1]	$ (9,213,127)		$ (13,980,566)	[3]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (325,459)		$ 1,891,050
ProShares UltraShort Bloomberg Crude Oil [Member] | UBS AG [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1]	0.25%		0.25%	[2]
Termination Date	[1]	Jan. 6, 2020		Jan. 7, 2019
Notional Amount at Value	[1]	$ (19,757,339)		$ (42,493,832)	[3]
Unrealized Appreciation (Depreciation)/ Value	[1]	(697,939)		$ 3,428,977
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value	[5]	$ (1,172,809)
ProShares UltraShort Gold [Member] | Citibank N.A. [Member] | Gold Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[5],[6]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[5],[7]	$ (13,940,590)
Unrealized Appreciation (Depreciation)/ Value	[5]	$ (534,714)
ProShares UltraShort Gold [Member] | Goldman Sachs International [Member] | Gold Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[5],[6]	0.20%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[5],[7]	$ (6,884,579)
Unrealized Appreciation (Depreciation)/ Value	[5]	$ (263,870)
ProShares UltraShort Gold [Member] | UBS AG [Member] | Gold Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[5],[6]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[5],[7]	$ (9,756,431)
Unrealized Appreciation (Depreciation)/ Value	[5]	(374,225)
Proshares Ultra Short Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (1,953,904)
Proshares Ultra Short Silver [Member] | Citibank N.A. [Member] | Silver Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ (9,595,700)
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (788,313)
Proshares Ultra Short Silver [Member] | Goldman Sachs International [Member] | Silver Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ (4,926,137)
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (401,324)
Proshares Ultra Short Silver [Member] | UBS AG [Member] | Silver Subindex [Member] | Bloomberg [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[2]	0.25%
Termination Date	[1]	Jan. 6, 2020
Notional Amount at Value	[1],[3]	$ (10,687,683)
Unrealized Appreciation (Depreciation)/ Value	[1]	$ (764,267)
[1]	The positions and counterparties herein are as of December 31, 2019. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[2]	Reflects the floating financing rate, as of December 31, 2019, on the notional amount of the swap agreement paid to the counterparty or received from the counterparty, excluding any commissions. Total Return Swap Agreements payment is due at termination/maturity.
[3]	For swap agreements, a positive amount represents “long” exposure to the benchmark index. A negative amount represents “short” exposure to the benchmark index.
[4]	Reflects the floating financing rate, as of December 31, 2018, on the notional amount of the swap agreement paid to the counterparty or received from the counterparty, excluding any commissions. Total Return Swap Agreements payment is due at termination/maturity.
[5]	The positions and counterparties herein are as of December 31, 2018. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[6]	Reflects the floating financing rate, as of December 31, 2018, on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions. Total Return Swap Agreements payment is due at termination/maturity.
[7]	For forward agreements, a positive amount represents “long” exposure to the benchmark index. A negative amount represents “short” exposure to the benchmark index.

Schedule of Investments - Forei

Schedule of Investments - Foreign Currency Forward Contracts (Detail) - Foreign Currency Forward Contracts [Member]		12 Months Ended
		Dec. 31, 2019EUR (€)		Dec. 31, 2018EUR (€)		Dec. 31, 2019JPY (¥)	Dec. 31, 2019USD ($)		Dec. 31, 2018JPY (¥)	Dec. 31, 2018USD ($)
ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value							$ 109,997	[1]		$ 61,971	[2]
ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 10, 2020	[1]	Jan. 11, 2019	[2]
Contract Amount/ Notional Amount		€ 5,436,377	[1]	€ 7,046,525	[2]		6,100,637	[1]		8,079,203	[2]
Unrealized Appreciation (Depreciation)/Value							54,679	[1]		28,315	[2]
ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 10, 2020	[1]	Jan. 11, 2019	[2]
Contract Amount/ Notional Amount		€ 5,589,416	[1]	€ 6,507,700	[2]		6,272,376	[1]		7,461,414	[2]
Unrealized Appreciation (Depreciation)/Value							55,318	[1]		33,656	[2]
ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[2]									(4,033)
ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]			Jan. 11, 2019
Contract Amount/ Notional Amount	[2]			€ (206,300)						(236,533)
Unrealized Appreciation (Depreciation)/Value	[2]									(2,106)
ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]			Jan. 11, 2019
Contract Amount/ Notional Amount	[2]			€ (203,200)						(232,979)
Unrealized Appreciation (Depreciation)/Value	[2]									(1,927)
ProShares Ultra Yen [Member] | Yen Contract [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value							(10,529)
ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[1]						(10,245)			179,187
ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[1]					¥ 325,804,302	2,999,073		¥ 314,867,300	2,873,778
Unrealized Appreciation (Depreciation)/Value	[1]						(2,404)			73,705
ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[1]					888,782,738	8,181,365		955,546,600	8,721,224
Unrealized Appreciation (Depreciation)/Value	[1]						(7,841)			105,482
ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[1]						(284)			(2,076)
ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[1]					(6,892,531)	(63,447)		(10,055,200)	(91,773)
Unrealized Appreciation (Depreciation)/Value	[1]						(284)			(2,076)
ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[2]						115,751			104,074
ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]			Jan. 11, 2019
Contract Amount/ Notional Amount	[2]			€ 11,497,100						13,182,017
Unrealized Appreciation (Depreciation)/Value	[2]									54,842
ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[2]	€ 19,396,955		€ 33,071,100			21,767,031			37,917,719
Unrealized Appreciation (Depreciation)/Value	[2]						115,751			49,232
ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[2]						(2,366,171)			(1,599,878)
ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[2]	€ (112,762,143)		€ (152,127,525)			(126,540,324)			(174,422,043)
Unrealized Appreciation (Depreciation)/Value	[2]						(1,134,162)			(664,844)
ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[2]	€ (122,358,446)		€ (161,054,700)			(137,309,180)			(184,657,508)
Unrealized Appreciation (Depreciation)/Value	[2]						(1,232,009)			(935,034)
ProShares UltraShort Yen [Member] | Yen Contract [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[2]						95,899
ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[2]						36,292			678,152
ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]			Jan. 11, 2019
Contract Amount/ Notional Amount	[2]								1,459,634,700	13,322,009
Unrealized Appreciation (Depreciation)/Value	[2]									330,465
ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[2]					1,025,624,482	9,441,012		2,446,453,800	22,328,658
Unrealized Appreciation (Depreciation)/Value	[2]						36,292			347,687
ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	[2]						59,607			(3,801,896)
ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[2]					(4,448,656,033)	(40,950,479)		(7,490,711,300)	(68,367,332)
Unrealized Appreciation (Depreciation)/Value	[2]						32,828			(1,755,536)
ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[2]	Jan. 10, 2020		Jan. 11, 2019
Contract Amount/ Notional Amount	[2]					¥ (4,893,578,348)	(45,046,049)		¥ (8,547,990,500)	(78,017,066)
Unrealized Appreciation (Depreciation)/Value	[2]						$ 26,779			$ (2,046,360)
[1]	The positions and counterparties herein are as of December 31, 2019. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[2]	The positions and counterparties herein are as of December 31, 2018. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.

Schedule of Investments - Forwa

Schedule of Investments - Forward Agreements (Detail) - Forward Agreements [Member]	12 Months Ended
	Dec. 31, 2018USD ($)	[1]
ProShares Ultra Gold [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	$ 4,253,301
ProShares Ultra Gold [Member] | Citibank N.A. [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	2.85%	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 50,300
Notional Amount at Value	64,366,395	[3]
Unrealized Appreciation (Depreciation)/Value	$ 1,682,026
ProShares Ultra Gold [Member] | Goldman Sachs International [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	3.30%	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 36,620
Notional Amount at Value	46,862,980	[3]
Unrealized Appreciation (Depreciation)/Value	$ 1,223,528
ProShares Ultra Gold [Member] | Societe Generale S.A. [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	3.02%	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 1,000
Notional Amount at Value	1,279,640	[3]
Unrealized Appreciation (Depreciation)/Value	$ 61,260
ProShares Ultra Gold [Member] | UBS AG [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	2.90%	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 37,900
Notional Amount at Value	48,497,598	[3]
Unrealized Appreciation (Depreciation)/Value	1,286,487
ProShares Ultra Silver [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	$ 26,301,717
ProShares Ultra Silver [Member] | Citibank N.A. [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	3.05%	[4]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 9,480,000
Notional Amount at Value	146,687,832	[5]
Unrealized Appreciation (Depreciation)/Value	$ 9,662,061
ProShares Ultra Silver [Member] | Goldman Sachs International [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	3.65%	[4]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 8,070,800
Notional Amount at Value	124,892,402	[5]
Unrealized Appreciation (Depreciation)/Value	$ 8,418,745
ProShares Ultra Silver [Member] | Societe Generale S.A. [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	3.17%	[4]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 100,000
Notional Amount at Value	1,547,320	[5]
Unrealized Appreciation (Depreciation)/Value	$ 118,797
ProShares Ultra Silver [Member] | UBS AG [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	3.68%	[4]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ 7,786,000
Notional Amount at Value	120,486,014	[5]
Unrealized Appreciation (Depreciation)/Value	8,102,114
ProShares UltraShort Silver [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	$ (1,793,011)
ProShares UltraShort Silver [Member] | Citibank N.A. [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.55%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (399,000)
Notional Amount at Value	(6,173,887)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (566,050)
ProShares UltraShort Silver [Member] | Goldman Sachs International [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.80%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (559,500)
Notional Amount at Value	(8,658,038)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (605,756)
ProShares UltraShort Silver [Member] | Societe Generale S.A. [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.27%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (100,000)
Notional Amount at Value	(1,547,320)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (119,953)
ProShares UltraShort Silver [Member] | UBS AG [Member] | Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.78%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (407,000)
Notional Amount at Value	(6,298,203)	[3]
Unrealized Appreciation (Depreciation)/Value	(501,252)
ProShares UltraShort Gold [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)/Value	$ (990,786)
ProShares UltraShort Gold [Member] | Citibank N.A. [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.35%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (11,200)
Notional Amount at Value	(14,332,080)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (380,655)
ProShares UltraShort Gold [Member] | Goldman Sachs International [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.45%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (7,598)
Notional Amount at Value	(9,723,237)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (258,134)
ProShares UltraShort Gold [Member] | Societe Generale S.A. [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.12%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (1,000)
Notional Amount at Value	(1,279,640)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (63,076)
ProShares UltraShort Gold [Member] | UBS AG [Member] | Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	(2.10%)	[2]
Settlement Date	Jan. 7, 2019
Commitment to (Deliver)/Receive	$ (7,450)
Notional Amount at Value	(9,533,169)	[3]
Unrealized Appreciation (Depreciation)/Value	$ (288,921)
[1]	The positions and counterparties herein are as of December 31, 2018. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[2]	Reflects the floating financing rate, as of December 31, 2018, on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions. Total Return Swap Agreements payment is due at termination/maturity.
[3]	For forward agreements, a positive amount represents “long” exposure to the benchmark index. A negative amount represents “short” exposure to the benchmark index.
[4]	Reflects the floating financing rate, as of December 31, 2018, on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions. Forward Agreements payment is due at termination/maturity.
[5]	For forward agreements, a positive amount represents “long” exposure to the underlying commodity. A negative amount represents “short” exposure to the underlying commodity.

Schedule of Investments - For_2

Schedule of Investments - Forward Agreements (Parenthetical) (Detail) - Forward Agreements [Member]	12 Months Ended
	Dec. 31, 2018ozt
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | Citibank N.A. [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | Citibank N.A. [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | Goldman Sachs International [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | Goldman Sachs International [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | Societe Generale S.A. [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | Societe Generale S.A. [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | UBS AG [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Five Fine Troy Ounce Gold [Member] | Gold [Member] | UBS AG [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.995
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | Citibank N.A. [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | Citibank N.A. [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | Goldman Sachs International [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | Goldman Sachs International [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | Societe Generale S.A. [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | Societe Generale S.A. [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | UBS AG [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999
Basis Zero Point Nine Nine Nine Fine Troy Ounce Silver [Member] | Silver [Member] | UBS AG [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Derivative, nonmonetary notional amount, mass	0.999

Organization - Additional Infor

Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019USD ($)Trustshares
Subsidiary, Sale of Stock [Line Items]
Number of series of Trust | Trust	20
Period for expected multiple returns	1 day
ProShares UltraShort Bloomberg Crude Oil [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares UltraShort Gold [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares UltraShort Silver [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares UltraShort Euro [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares UltraShort Yen [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares Ultra Bloomberg Crude Oil [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares Ultra Gold [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares Ultra Silver [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares Ultra Euro [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350
ProShares Ultra Yen [Member] | Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Share issued, shares | shares	14
Shares issued, value | $	$ 350

Organization - Schedule of Shar

Organization - Schedule of Share Splits and Reverse Share Splits (Detail)	12 Months Ended
	Dec. 31, 2019
Proshares Ultra Short Bloomberg Crude Oil [Member] | January 11, 2017 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jan. 11, 2017
Type of Split	2-for-1 Share split
Date Trading Resumed at Post- Split Price	Jan. 12, 2017
Proshares Ultra Bloomberg Crude Oil [Member] | January 11, 2017 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jan. 11, 2017
Type of Split	1-for-2 reverse Share split
Date Trading Resumed at Post- Split Price	Jan. 12, 2017
ProShares Ultra VIX Short-Term Futures ETF [Member] | January 11, 2017 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jan. 11, 2017
Type of Split	1-for-5 reverse Share split
Date Trading Resumed at Post- Split Price	Jan. 12, 2017
ProShares Ultra VIX Short-Term Futures ETF [Member] | July 14, 2017 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jul. 14, 2017
Type of Split	1-for-4 reverse Share split
Date Trading Resumed at Post- Split Price	Jul. 17, 2017
ProShares Ultra VIX Short-Term Futures ETF [Member] | September 17, 2018 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Sep. 17, 2018
Type of Split	1-for-5 reverse Share split
Date Trading Resumed at Post- Split Price	Sep. 18, 2018
ProShares Short VIX Short-Term Futures ETF [Member] | July 12, 2017 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jul. 12, 2017
Type of Split	2-for-1 Share split
Date Trading Resumed at Post- Split Price	Jul. 17, 2017
ProShares Short VIX Short-Term Futures ETF [Member] | September 17, 2018 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Sep. 17, 2018
Type of Split	1-for-4 reverse Share split
Date Trading Resumed at Post- Split Price	Sep. 18, 2018
Proshares VIX Short Term Futures ETF [Member] | July 14, 2017 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jul. 14, 2017
Type of Split	1-for-4 reverse Share split
Date Trading Resumed at Post- Split Price	Jul. 17, 2017
ProShares Ultra Bloomberg Natural Gas [Member] | March 19, 2018 Reserve Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Mar. 19, 2018
Type of Split	1-for-5 reverse Share split
Date Trading Resumed at Post- Split Price	Mar. 20, 2018
ProShares UltraPro 3x Short Crude Oil ETF [Member] | March 19, 2018 Reserve Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Mar. 19, 2018
Type of Split	1-for-4 reverse Share split
Date Trading Resumed at Post- Split Price	Mar. 20, 2018

Significant Accounting Polici_4

Significant Accounting Policies - Cut-off Times and Times of Calculation of Funds' Final Net Asset Value for Creation and Redemption of Fund Shares (Detail)	12 Months Ended
	Dec. 31, 2019
ProShares UltraShort Silver [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	1:00 p.m.
NAV Calculation Time	1:25 p.m.
ProShares UltraShort Gold [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	1:00 p.m.
NAV Calculation Time	1:30 p.m.
ProShares Ultra Bloomberg Crude Oil [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	2:30 p.m.
ProShares Ultra Bloomberg Natural Gas [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	2:30 p.m.
ProShares UltraShort Australian Dollar [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
ProShares Ultra Euro [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
ProShares Ultra Yen [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
ProShares Short VIX Short-Term Futures ETF [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	4:15 p.m.
ProShares VIX Mid-Term Futures ETF [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	4:15 p.m.

Significant Accounting Polici_5

Significant Accounting Policies - Valuation of Investments using Fair Value Hierarchy (Detail) - USD ($)	Dec. 31, 2019		Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	$ 1,076,360,443		$ 768,305,596
ProShares Short Euro [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	731,805		556,148
ProShares Short VIX Short-Term Futures ETF [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	67,184,308		(14,476,201)
ProShares Ultra Bloomberg Crude Oil [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	222,695,628		193,695,474
ProShares Ultra Bloomberg Natural Gas [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	24,878,086		(1,942,736)
ProShares Ultra Euro [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	4,080,409		1,554,596
ProShares Ultra Gold [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	74,316,772		46,267,705
ProShares Ultra Silver [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	166,404,548		150,438,259
ProShares Ultra VIX Short-Term Futures ETF [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	133,142,697		31,173,016
ProShares Ultra Yen [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	1,797,575		177,111
Proshares UltraPro 3X Crude Oil ETF [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	54,459,660		(2,471,485)
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	49,017,076		7,019,475
ProShares UltraShort Australian Dollar [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	3,707,474		811,362
ProShares UltraShort Bloomberg Crude Oil [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	55,046,663		51,886,415
ProShares UltraShort Bloomberg Natural Gas [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	5,827,205		11,137,703
ProShares UltraShort Euro [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	76,339,680		120,305,881
ProShares UltraShort Gold [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	10,790,813		2,966,997
ProShares UltraShort Silver [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	7,126,782		1,456,838
ProShares UltraShort Yen [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	25,638,722		31,827,485
ProShares VIX Mid-Term Futures ETF [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	11,699,734		3,758,106
ProShares VIX Short-Term Futures ETF [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	81,474,806		132,163,447
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	1,084,925,128		785,085,860
Level I - Quoted Prices [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(51,979,952)	[1]	13,284,362
Level I - Quoted Prices [Member] | ProShares Short Euro [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	745,805		599,429
Level I - Quoted Prices [Member] | ProShares Short Euro [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(14,000)	[1]	(43,281)
Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	56,929,436
Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	10,254,872	[1]	(14,476,201)
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	200,115,463		280,502,900
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	765,575	[1]	(14,040,301)
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	27,530,314		8,380,427
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(2,652,228)	[1]	(10,323,163)
Level I - Quoted Prices [Member] | ProShares Ultra Euro [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	3,970,412		1,496,658
Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	66,177,998		41,941,734
Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	2,248,514	[1]	72,670
Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	135,544,101		123,795,806
Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	5,724,549	[1]	340,736
Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	179,749,262
Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(46,396,781)	[1]	32,503,965
Level I - Quoted Prices [Member] | ProShares Ultra Yen [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	1,808,104
Level I - Quoted Prices [Member] | Proshares UltraPro 3X Crude Oil ETF [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	47,193,110		20,979,876
Level I - Quoted Prices [Member] | Proshares UltraPro 3X Crude Oil ETF [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	7,266,550	[1]	(23,451,361)
Level I - Quoted Prices [Member] | ProShares UltraPro 3X Short Crude Oil ETF [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	57,375,132
Level I - Quoted Prices [Member] | ProShares UltraPro 3X Short Crude Oil ETF [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(8,358,056)	[1]	7,019,475
Level I - Quoted Prices [Member] | ProShares UltraShort Australian Dollar [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	3,931,474		299,537
Level I - Quoted Prices [Member] | ProShares UltraShort Australian Dollar [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(224,000)	[1]	511,825
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	62,199,283		27,967,534
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(3,118,689)	[1]	3,272,155
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	5,154,876		299,714
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	672,329	[1]	10,837,989
Level I - Quoted Prices [Member] | ProShares UltraShort Euro [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	78,590,100		121,801,685
Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	12,355,192		3,989,563
Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(391,570)	[1]	(31,780)
Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	9,162,867		3,294,766
Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(82,181)	[1]	(44,917)
Level I - Quoted Prices [Member] | ProShares UltraShort Yen [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	25,542,823		34,951,229
Level I - Quoted Prices [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	13,980,559
Level I - Quoted Prices [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(2,280,825)	[1]	3,758,106
Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	96,868,817		114,785,002
Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(15,394,011)	[1]	17,378,445
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure			27,771,221
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(2,055,053)		(4,384,499)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	45,470,320		(53,451,348)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	21,814,590		(72,767,125)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	109,997		57,938
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Gold [Member] | Forward Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure			4,253,301
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Gold [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	5,890,260
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Silver [Member] | Forward Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure			26,301,717
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Silver [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	25,135,898
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(209,784)		(1,330,949)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(10,529)		177,111
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(4,033,931)		20,646,726
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(2,250,420)		(1,495,804)
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure			(990,786)
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Gold [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(1,172,809)
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure			(1,793,011)
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Silver [Member] | Swap Agreements [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	(1,953,904)
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, fair value disclosure	$ 95,899		$ (3,123,744)
[1]	Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures.

Significant Accounting Polici_6

Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Minimum [Member] | Matching VIX Funds [Member]
Significant Accounting Policies [Line Items]
Percentage of brokerage commissions exceed variable create/redeem fees	0.02%

Investments - Fair Value of Der

Investments - Fair Value of Derivative Instruments (Detail) - Not Designated as Hedging Instrument [Member] - USD ($)		Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	$ 80,270,931	$ 131,270,135
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	88,835,616	148,050,399
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	170,017	15,386,661
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	46,606,565	2,625,566
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	2,286,955	130,050
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	15,394,011	1,014,514
VIX Futures Contracts [Member] | Receivables on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	10,424,889	910,460
VIX Futures Contracts [Member] | Receivables on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		33,798,582
VIX Futures Contracts [Member] | Receivables on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	6,130	3,888,156
VIX Futures Contracts [Member] | Receivables on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		18,392,959
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	7,152,620
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	1,564,379	1,022,566
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	2,036,085	1,837,928
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | Proshares UltraPro 3X Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		23,451,361
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraPro 3X Short Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	8,358,056
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		86,807,426
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	2,652,228	10,323,163
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		23,918,881
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	672,329	10,837,989
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | Proshares UltraPro 3X Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	7,266,550
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraPro 3X Short Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		7,019,475
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	22,580,165
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	8,138,774	4,325,971
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	30,860,447	26,642,453
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	14,000	43,281
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation			4,033
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	224,000
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation		10,529	2,076
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation		2,366,171	1,599,878
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation			3,801,896
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		109,997	61,971
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		511,825
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation			179,187
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		115,751	104,074
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		$ 95,899	$ 678,152
[1]	Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures.

Investments - Effect of Derivat

Investments - Effect of Derivative Instruments on Statements of Operations (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	$ (447,021,139)	$ (1,483,065,223)	$ (438,531,686)	[1]
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	8,263,887	(52,874,307)	(5,496,117)	[1]
ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(194,350,788)	89,901,119	(194,006,340)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(32,770,663)	22,155,157	(4,304,579)
ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(6,228,644)	4,332,654	(25,320,147)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(6,037,881)	5,973,199	(926,594)
ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	125,641,839	(1,885,823,832)	897,400,073
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	24,733,759	(31,465,785)	27,294,500
ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(612,840,041)	389,993,011	(1,020,772,793)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(77,766,851)	65,652,401	(26,502,876)
ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(14,247,456)	(42,039,983)	(6,491,508)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(31,068,746)	58,511,410	(20,957,983)
ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	19,286,567	(14,147,964)	4,761,749
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(10,165,386)	11,934,953	(614,897)
ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(5,192,568)	1,323,731	(6,994,765)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(540,991)	472,667	(4,548,271)
ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(4,544,544)	5,022,945	1,152,461
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(197,430)	(117,191)	(3,132,869)
ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	144,188,809	21,754,687	22,131,716
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	109,396,338	(160,959,424)	13,257,749
ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(32,380,218)	21,092,833	(40,794,286)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	7,672,614	(17,547,032)	4,686,596
ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	19,588,339	(7,345,178)	11,485,101
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	3,815,690	680,186	8,096,461
ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	34,374,143	(57,489,729)	(31,762,627)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	4,223,101	4,931,185	42,712,371
ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	973,665	459,984	(1,162,371)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	29,313	123,365	(299,569)
ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	833,199	128,204	(866,949)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(735,608)	1,406,028	(2,076,278)
ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	13,747,208	18,953,236	(39,695,465)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(753,437)	4,869,355	(22,527,463)
ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(1,979,679)	2,111,630	(8,733,473)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	3,220,521	(4,640,285)	(15,227,152)
ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(722,691)	(1,063,816)	2,212,226
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	52,274	(205,861)	837,700
ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	57,990	(170,364)	(46,278)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(187,566)	212,218	307,194
Proshares UltraPro 3X Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	69,178,251	(37,435,672)	6,018,618
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	30,719,431	(24,868,483)	1,417,998
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(2,404,520)	7,377,281	(7,046,628)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(15,374,595)	10,007,630	(2,988,155)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(447,102,441)	(1,482,790,442)	(438,481,644)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	8,215,579	(53,081,641)	(5,294,115)
Not Designated as Hedging Instrument [Member] | VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/Changes in Unrealized Appreciation (Depreciation) on Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(194,363,991)	89,903,111	(194,005,568)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(32,772,456)	22,140,322	(4,293,225)
Not Designated as Hedging Instrument [Member] | VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/Changes in Unrealized Appreciation (Depreciation) on Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(6,228,652)	4,332,654	(25,319,770)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(6,038,931)	5,973,386	(927,035)
Not Designated as Hedging Instrument [Member] | VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/Changes in Unrealized Appreciation (Depreciation) on Futures Contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	125,639,084	(1,885,564,719)	897,400,516
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	24,731,073	(31,517,650)	27,351,060
Not Designated as Hedging Instrument [Member] | VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts/Changes in Unrealized Appreciation (Depreciation) on Futures Contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(612,858,632)	390,000,742	(1,020,750,851)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(77,779,581)	65,639,136	(26,493,883)
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(14,251,700)	(42,040,086)	(6,491,060)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(31,071,501)	58,488,671	(20,936,094)
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	19,286,567	(14,147,964)	4,762,532
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(10,165,660)	11,935,038	(615,018)
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(5,193,260)	1,323,579	(6,993,557)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(541,813)	471,153	(4,546,265)
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(4,544,770)	5,024,976	1,153,393
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(198,157)	(120,115)	(3,129,369)
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	144,170,473	21,756,994	22,146,212
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	109,387,591	(160,991,766)	13,288,604
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(32,380,194)	21,092,864	(40,793,265)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	7,670,935	(17,548,973)	4,689,090
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	19,587,937	(7,345,006)	11,484,410
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	3,812,803	674,136	8,101,902
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	34,367,044	(57,488,526)	(31,762,834)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	4,217,994	4,905,519	42,740,483
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | Proshares UltraPro 3X Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	69,170,933	(37,435,672)	6,018,618
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	30,717,911	(24,869,359)	1,417,998
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraPro 3X Short Crude Oil ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(2,410,550)	7,377,281	(7,046,628)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(15,377,531)	10,007,630	(2,988,155)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts [Member] | ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	972,479	459,984	(1,161,987)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	29,281	123,007	(299,188)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	833,171	128,451	(866,771)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(735,825)	1,405,045	(2,075,560)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	13,745,299	18,953,455	(39,691,680)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	(754,616)	4,848,465	(22,507,200)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(1,979,140)	2,111,627	(8,729,472)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	3,219,643	(4,651,007)	(15,217,674)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(722,691)	(1,063,823)	2,212,313
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	52,059	(206,214)	838,162
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation (depreciation) on futures and/or foreign currency forward contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	58,152	(170,364)	(46,195)
Change in Unrealized Appreciation/ Depreciation on Derivatives Recognized in Income	$ (187,640)	$ 211,935	$ 307,252
[1]	The operations include the activity of ProShares UltraPro 3x Crude Oil ETF and ProShares UltraPro 3x Short Crude Oil ETF since January 13, 2017 (inception date).

Investments - Offsetting of Fin

Investments - Offsetting of Financial Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Swap Agreements [Member]
Derivative [Line Items]
Net Amounts of Assets presented in the Statements of Financial Condition	$ 52,840,748	$ 20,646,726
Net Amounts of Liabilities presented in the Statements of Financial Condition	7,370,428	74,098,074
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Net Amounts of Assets presented in the Statements of Financial Condition	321,647	1,023,384
Net Amounts of Liabilities presented in the Statements of Financial Condition	2,376,700	5,407,883
Forward Agreements [Member]
Derivative [Line Items]
Net Amounts of Assets presented in the Statements of Financial Condition		30,555,018
Net Amounts of Liabilities presented in the Statements of Financial Condition		2,783,797
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	21,814,590	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	21,814,590	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0	72,767,125
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0	72,767,125
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	109,997	61,971
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	109,997	61,971
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0	4,033
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0	4,033
ProShares Ultra Gold [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	5,890,260
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Assets presented in the Statements of Financial Condition	5,890,260
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		4,253,301
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Assets presented in the Statements of Financial Condition		4,253,301
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		0
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Liabilities presented in the Statements of Financial Condition		0
ProShares Ultra Silver [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	25,135,898
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Assets presented in the Statements of Financial Condition	25,135,898
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0
ProShares Ultra Silver [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		26,301,717
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Assets presented in the Statements of Financial Condition		26,301,717
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		0
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Liabilities presented in the Statements of Financial Condition		0
ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	0	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	209,784	1,330,949
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	209,784	1,330,949
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0	179,187
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	0	179,187
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	10,529	2,076
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	10,529	2,076
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0	20,646,726
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	0	20,646,726
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	4,033,931	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	4,033,931	0
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	115,751	104,074
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	115,751	104,074
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	2,366,171	1,599,878
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	2,366,171	1,599,878
ProShares UltraShort Gold [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Assets presented in the Statements of Financial Condition	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	1,172,809
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	1,172,809
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		0
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Assets presented in the Statements of Financial Condition		0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		990,786
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Liabilities presented in the Statements of Financial Condition		990,786
ProShares UltraShort Silver [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Assets presented in the Statements of Financial Condition	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	1,953,904
Gross Amounts Offset in the Statements of Financial Condition	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	1,953,904
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		0
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Assets presented in the Statements of Financial Condition		0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		1,793,011
Gross Amounts Offset in the Statements of Financial Condition		0
Net Amounts of Liabilities presented in the Statements of Financial Condition		1,793,011
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	95,899	678,152
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	95,899	678,152
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0	3,801,896
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	$ 0	$ 3,801,896

Investments - Gross Amounts Not

Investments - Gross Amounts Not Offset in Statements of Financial Condition (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Financial Instruments for the Benefit of (the Funds) / the Counterparties	$ 0
ProShares Ultra Bloomberg Crude Oil [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	6,039,121	$ (22,752,565)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		20,667,565
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(6,039,121)	2,085,000
ProShares Ultra Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	4,393,163	(15,691,687)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(4,393,163)	10,417,687
Cash Collateral for the Benefit of (the Funds) / the Counterparties		5,274,000
ProShares Ultra Bloomberg Crude Oil [Member] | Royal Bank of Canada [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	4,210,281	(13,836,386)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		13,836,386
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(4,210,281)
ProShares Ultra Bloomberg Crude Oil [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	2,253,037	(5,206,589)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(2,253,037)	1,491,589
Cash Collateral for the Benefit of (the Funds) / the Counterparties		3,715,000
ProShares Ultra Bloomberg Crude Oil [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	4,918,988	(15,279,898)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(4,918,988)	15,156,898
Cash Collateral for the Benefit of (the Funds) / the Counterparties		123,000
ProShares Ultra Euro [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	54,679	26,209
Net Amounts	54,679	26,209
ProShares Ultra Euro [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	55,318	31,729
Net Amounts	55,318	31,729
ProShares Ultra Gold [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	2,300,665	1,682,026
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(1,682,026)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(1,960,000)
Net Amounts	340,665
ProShares Ultra Gold [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	1,681,492	1,223,528
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(1,489,073)	(1,223,528)
Net Amounts	192,419
ProShares Ultra Gold [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition		61,260
Net Amounts		61,260
ProShares Ultra Gold [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	1,908,103	1,286,487
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(1,638,362)	(1,286,487)
Net Amounts	269,741
ProShares Ultra Silver [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	10,329,244	9,662,061
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(8,053,860)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(10,329,244)
Net Amounts		1,608,201
ProShares Ultra Silver [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	5,925,755	8,418,745
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(5,925,755)	(1,655,971)
Net Amounts		6,762,774
ProShares Ultra Silver [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition		118,797
Net Amounts		118,797
ProShares Ultra Silver [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	8,880,899	8,102,114
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(8,880,899)	(6,971,401)
Net Amounts		1,130,713
ProShares Ultra VIX Short-Term Futures ETF [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition		(1,330,949)
Cash Collateral for the Benefit of (the Funds) / the Counterparties		1,330,949
ProShares Ultra VIX Short-Term Futures ETF [Member] | Goldman Sachs & Co. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(209,784)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	209,784
ProShares Ultra Yen [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(2,404)	73,705
Cash Collateral for the Benefit of (the Funds) / the Counterparties	2,404
Net Amounts		73,705
ProShares Ultra Yen [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(8,125)	103,406
Cash Collateral for the Benefit of (the Funds) / the Counterparties	8,125
Net Amounts		103,406
ProShares UltraShort Bloomberg Crude Oil [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(1,401,797)	8,336,367
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,401,797	(8,336,367)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares UltraShort Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(793,395)	2,752,372
Financial Instruments for the Benefit of (the Funds) / the Counterparties	793,395	(2,752,372)
ProShares UltraShort Bloomberg Crude Oil [Member] | Royal Bank of Canada [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(815,341)	4,237,960
Financial Instruments for the Benefit of (the Funds) / the Counterparties	815,341
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	(4,237,960)
ProShares UltraShort Bloomberg Crude Oil [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(325,459)	1,891,050
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(1,891,050)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	325,459
ProShares UltraShort Bloomberg Crude Oil [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(697,939)	3,428,977
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(3,428,977)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	697,939
ProShares UltraShort Euro [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(1,134,162)	(610,002)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,134,162	610,002
ProShares UltraShort Euro [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(1,116,258)	(885,802)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,116,258
Cash Collateral for the Benefit of (the Funds) / the Counterparties		885,802
ProShares UltraShort Gold [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(534,714)	(380,655)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	534,714	119,655
Cash Collateral for the Benefit of (the Funds) / the Counterparties		261,000
ProShares UltraShort Gold [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(263,870)	(258,134)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	263,870
Cash Collateral for the Benefit of (the Funds) / the Counterparties		258,134
ProShares UltraShort Gold [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition		(63,076)
Cash Collateral for the Benefit of (the Funds) / the Counterparties		63,076
ProShares UltraShort Gold [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(374,225)	(288,921)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	374,225	288,921
ProShares UltraShort Silver [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(788,313)	(566,050)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	788,313
Cash Collateral for the Benefit of (the Funds) / the Counterparties		566,050
ProShares UltraShort Silver [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(401,324)	(605,756)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	401,324	605,756
ProShares UltraShort Silver [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition		(119,953)
Cash Collateral for the Benefit of (the Funds) / the Counterparties		119,953
ProShares UltraShort Silver [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(764,267)	(501,252)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	764,267
Cash Collateral for the Benefit of (the Funds) / the Counterparties		501,252
ProShares UltraShort Yen [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	32,828	(1,425,071)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(32,828)
Cash Collateral for the Benefit of (the Funds) / the Counterparties		1,425,071
ProShares UltraShort Yen [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	63,071	(1,698,673)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	$ (63,071)	1,571,673
Cash Collateral for the Benefit of (the Funds) / the Counterparties		$ 127,000

Agreements - Additional Informa

Agreements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019USD ($)
Investment Holdings [Line Items]
Ceiling for legal fees	$ 100,000
Percentage of annual NAV as limit to pay SEC registration fees incurred	0.021%
Ceiling for per annum K-1 preparation and mailing fees against annual net assets of Fund	0.10%
Leveraged Fund [Member]
Investment Holdings [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.95%
GearedVix Funds [Member]
Investment Holdings [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.95%
ProShares Short Euro [Member]
Investment Holdings [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.95%
Matching VIX Funds [Member]
Investment Holdings [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.85%

Offering Costs - Additional Inf

Offering Costs - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Investment Holdings [Line Items]
Offering costs, amortization period	12 months

Creation and Redemption of Cr_3

Creation and Redemption of Creation Units - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019$ / EquityUnitshares
Creation And Redemption Of Creation Units [Line Items]
Creation Unit, block Shares of a Fund	50,000
Fixed transaction fee per Creation Unit, maximum | $ / EquityUnit	250
Variable transaction fee, percent of the value of the Creation Unit, maximum	0.10%
Matching VIX Funds [Member]
Creation And Redemption Of Creation Units [Line Items]
Creation Unit, block Shares of a Fund	25,000
Variable transaction fee, percent of the value of the Creation Unit, maximum	0.05%

Creation and Redemption of Cr_4

Creation and Redemption of Creation Units - Schedule of Transaction Fees (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment Holdings [Line Items]
Transaction fees	$ 2,474,778	$ 3,655,553	$ 3,138,503
ProShares Short VIX Short-Term Futures ETF [Member]
Investment Holdings [Line Items]
Transaction fees	189,274	699,323	1,008,452
ProShares Ultra Bloomberg Crude Oil [Member]
Investment Holdings [Line Items]
Transaction fees	57,619	235,966	610,969
ProShares Ultra Bloomberg Natural Gas [Member]
Investment Holdings [Line Items]
Transaction fees	5,580	16,562	15,937
ProShares Ultra Gold [Member]
Investment Holdings [Line Items]
Transaction fees	1,632	10,139	14,460
ProShares Ultra Silver [Member]
Investment Holdings [Line Items]
Transaction fees	7,332	26,173	28,622
ProShares Ultra VIX Short-Term Futures ETF [Member]
Investment Holdings [Line Items]
Transaction fees	1,925,312	2,194,669	1,036,162
Proshares UltraPro 3x Crude Oil ETF [Member]
Investment Holdings [Line Items]
Transaction fees	24,934	81,882	25,455
ProShares UltraPro 3x Short Crude Oil ETF [Member]
Investment Holdings [Line Items]
Transaction fees	8,919	46,345	14,096
ProShares UltraShort Bloomberg Crude Oil [Member]
Investment Holdings [Line Items]
Transaction fees	27,697	135,524	207,707
ProShares UltraShort Bloomberg Natural Gas [Member]
Investment Holdings [Line Items]
Transaction fees	1,378	9,616	4,713
ProShares UltraShort Gold [Member]
Investment Holdings [Line Items]
Transaction fees	1,606	10,644	15,945
ProShares VIX Mid-Term Futures ETF [Member]
Investment Holdings [Line Items]
Transaction fees	18,415	27,723	13,605
ProShares VIX Short-Term Futures ETF [Member]
Investment Holdings [Line Items]
Transaction fees	$ 205,080	$ 160,987	$ 142,380

Financial Highlights - Per Shar

Financial Highlights - Per Share Operating Performance (Detail) - $ / shares		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
ProShares Short Euro [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 43.10		$ 39.96		$ 45.06
Net investment income (loss)		0.55		0.22		(0.14)
Net realized and unrealized gain (loss)		1.99	[1]	2.92	[1]	(4.96)
Change in net asset value from operations		2.54		3.14		(5.10)
Net asset value, ending balance		45.64		43.10		39.96
Market value per share, beginning balance		43.08	[2]	39.99	[2]	45.12
Market value per share, ending balance	[2]	$ 45.69		$ 43.08		$ 39.99
Total Return, at net asset value		5.90%		7.90%		(11.30%)
Total Return, at market value		6.00%		7.70%		(11.40%)
Ratios to Average Net Assets
Expense ratio		0.97%		0.97%		0.97%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		1.24%		0.54%		(0.32%)
ProShares Short VIX Short-Term Futures ETF [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance	[3]	$ 42.36		$ 509.20		$ 182.46
Net investment income (loss)		0.18		(0.23)	[3]	(2.41)	[3]
Net realized and unrealized gain (loss)		23.08	[1]	(466.61)	[3]	329.15	[3]
Change in net asset value from operations		23.26		(466.84)	[3]	326.74	[3]
Net asset value, ending balance		65.62		42.36	[3]	509.20	[3]
Market value per share, beginning balance	[3]	42.30	[2]	512.84		181.96
Market value per share, ending balance		$ 65.23	[2]	$ 42.30	[2],[3]	$ 512.84	[3]
Total Return, at net asset value		54.90%		(91.70%)	[3]	179.00%	[3]
Total Return, at market value		54.20%		(91.80%)	[3]	181.80%	[3]
Ratios to Average Net Assets
Expense ratio		1.27%	[4]	1.34%	[3]	1.51%	[3]
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%	[3]	0.95%	[3]
Net investment income (loss)		0.33%		(0.37%)	[3]	(0.71%)	[3]
ProShares Ultra Bloomberg Crude Oil [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 13.06		$ 23.66		$ 23.34
Net investment income (loss)		0.19		0.20		(0.03)
Net realized and unrealized gain (loss)		7.12	[1]	(10.80)	[1]	0.35
Change in net asset value from operations		7.31		(10.60)		0.32
Net asset value, ending balance		20.37		13.06		23.66
Market value per share, beginning balance		13.30	[2]	23.44	[2]	23.36
Market value per share, ending balance	[2]	$ 20.46		$ 13.30		$ 23.44
Total Return, at net asset value		56.00%		(44.80%)		1.40%
Total Return, at market value		53.80%		(43.30%)		0.30%
Ratios to Average Net Assets
Expense ratio		0.99%		0.97%		0.98%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		1.02%		0.73%		(0.18%)
ProShares Ultra Bloomberg Natural Gas [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 25.28		$ 32.64	[3]	$ 94.24	[3]
Net investment income (loss)		0.07		0.09		(0.23)	[3]
Net realized and unrealized gain (loss)		(16.95)	[1]	(7.45)	[1]	(61.37)	[3]
Change in net asset value from operations		(16.88)		(7.36)		(61.60)	[3]
Net asset value, ending balance		8.40		25.28		32.64	[3]
Market value per share, beginning balance		25.82	[2]	32.50	[2],[3]	94.80	[3]
Market value per share, ending balance	[2]	$ 8.34		$ 25.82		$ 32.50	[3]
Total Return, at net asset value		(66.80%)		(22.50%)		(65.40%)	[3]
Total Return, at market value		(67.70%)		(20.60%)		(65.70%)	[3]
Ratios to Average Net Assets
Expense ratio		1.37%		1.22%		1.22%	[3]
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%	[3]
Net investment income (loss)		0.52%		0.30%		(0.50%)	[3]
ProShares Ultra Euro [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 15.09		$ 17.44		$ 14.02
Net investment income (loss)		0.13		0.06		(0.04)
Net realized and unrealized gain (loss)		(1.43)	[1]	(2.41)	[1]	3.46
Change in net asset value from operations		(1.30)		(2.35)		3.42
Net asset value, ending balance		13.79		15.09		17.44
Market value per share, beginning balance		15.12	[2]	17.46	[2]	14.09
Market value per share, ending balance	[2]	$ 13.77		$ 15.12		$ 17.46
Total Return, at net asset value		(8.60%)		(13.50%)		24.40%
Total Return, at market value		(8.90%)		(13.40%)		23.90%
Ratios to Average Net Assets
Expense ratio		0.95%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.89%		0.36%		(0.23%)
ProShares Ultra Gold [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 37.12		$ 39.88		$ 32.90
Net investment income (loss)		0.42		0.28		(0.06)
Net realized and unrealized gain (loss)		11.67	[1]	(3.04)	[1]	7.04
Change in net asset value from operations		12.09		(2.76)		6.98
Net asset value, ending balance		49.21		37.12		39.88
Market value per share, beginning balance		37.41	[2]	40.67	[2]	33.20
Market value per share, ending balance	[2]	$ 49.05		$ 37.41		$ 40.67
Total Return, at net asset value		32.60%		(6.90%)		21.20%
Total Return, at market value		31.10%		(8.00%)		22.50%
Ratios to Average Net Assets
Expense ratio		0.96%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.97%		0.73%		(0.14%)
ProShares Ultra Silver [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 26.39		$ 33.55		$ 33.44
Net investment income (loss)		0.25		0.20		(0.05)
Net realized and unrealized gain (loss)		5.06	[1]	(7.36)		0.16
Change in net asset value from operations		5.31		(7.16)		0.11
Net asset value, ending balance		31.70		26.39		33.55
Market value per share, beginning balance		26.37	[2]	33.85	[5]	32.09	[5]
Market value per share, ending balance		$ 31.65	[2]	$ 26.37	[2]	$ 33.85	[5]
Total Return, at net asset value		20.10%		(21.30%)		0.30%
Total Return, at market value		20.00%		(22.10%)		5.50%
Ratios to Average Net Assets
Expense ratio		0.97%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.91%		0.69%		(0.15%)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance	[3]	$ 81.46		$ 51.67		$ 869.63
Net investment income (loss)		0.01		(0.40)	[3]	(1.66)	[3]
Net realized and unrealized gain (loss)		(68.80)	[1]	30.19	[3]	(816.30)	[3]
Change in net asset value from operations		(68.79)		29.79	[3]	(817.96)	[3]
Net asset value, ending balance		12.67		81.46	[3]	51.67	[3]
Market value per share, beginning balance	[3]	81.73	[2]	51.05		875
Market value per share, ending balance		$ 12.89	[2]	$ 81.73	[2],[3]	$ 51.05	[3]
Total Return, at net asset value		(84.40%)		57.70%	[3]	(94.10%)	[3]
Total Return, at market value		(84.20%)		60.10%	[3]	(94.20%)	[3]
Ratios to Average Net Assets
Expense ratio		1.54%	[6]	1.68%	[3]	1.90%	[3]
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%	[3]	0.95%	[3]
Net investment income (loss)		0.02%		(0.75%)	[3]	(1.17%)	[3]
ProShares Ultra Yen [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 57.53		$ 57.32		$ 55.43
Net investment income (loss)		0.52		(0.02)		(0.24)
Net realized and unrealized gain (loss)		(2.22)	[1]	0.23		2.13
Change in net asset value from operations		(1.70)		0.21		1.89
Net asset value, ending balance		55.83		57.53		57.32
Market value per share, beginning balance		57.55	[2]	57.45	[5]	55.52	[5]
Market value per share, ending balance		$ 55.83	[2]	$ 57.55	[2]	$ 57.45	[5]
Total Return, at net asset value		(3.00%)		0.40%		3.40%
Total Return, at market value		(3.00%)		0.20%		3.50%
Ratios to Average Net Assets
Expense ratio		0.95%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.92%		(0.03%)		(0.41%)
Proshares UltraPro 3X Crude Oil ETF [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 13.08		$ 37.78	[7]	$ 25	[7]
Net investment income (loss)		0.14		(0.04)		(0.21)	[7]
Net realized and unrealized gain (loss)		8.25	[1]	(24.66)		12.99	[7]
Change in net asset value from operations		8.39		(24.70)		12.78	[7]
Net asset value, ending balance		21.47		13.08		37.78	[7]
Market value per share, beginning balance		13.47	[2]	37.23	[5],[7]	25	[5],[7]
Market value per share, ending balance		$ 21.60	[2]	$ 13.47	[2]	$ 37.23	[5],[7]
Total Return, at net asset value		64.10%		(65.40%)		51.10%	[7],[8]
Total Return, at market value		60.40%		(63.80%)		48.90%	[7],[8]
Ratios to Average Net Assets
Expense ratio		1.25%		1.22%		1.30%	[7],[9]
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%	[7],[9]
Net investment income (loss)		0.66%		(0.12%)		(1.20%)	[7],[9]
ProShares UltraPro 3X Short Crude Oil ETF [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 49.79	[3]	$ 42.32	[7]	$ 100	[7]
Net investment income (loss)		0.05		(0.12)	[3]	(0.66)	[7]
Net realized and unrealized gain (loss)		(39.18)	[1]	7.59	[3]	(57.02)	[7]
Change in net asset value from operations		(39.13)		7.47	[3]	(57.68)	[7]
Net asset value, ending balance		10.66		49.79	[3]	42.32	[7]
Market value per share, beginning balance		48.43	[2],[3]	42.88	[3],[5],[7]	100	[5],[7]
Market value per share, ending balance		$ 10.58	[2]	$ 48.43	[2],[3]	$ 42.88	[3],[5],[7]
Total Return, at net asset value		(78.60%)		17.70%	[3]	(57.70%)	[7],[8]
Total Return, at market value		(78.20%)		12.90%	[3]	(57.10%)	[7],[8]
Ratios to Average Net Assets
Expense ratio		1.40%		1.24%	[3]	1.32%	[7],[9]
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%	[3]	0.95%	[7],[9]
Net investment income (loss)		0.31%		(0.45%)	[3]	(1.25%)	[7],[9]
ProShares UltraShort Australian Dollar [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 55.30		$ 45.67		$ 55.38
Net investment income (loss)		0.59		0.23		(0.17)
Net realized and unrealized gain (loss)		0.20	[1]	9.40		(9.54)
Change in net asset value from operations		0.79		9.63		(9.71)
Net asset value, ending balance		56.09		55.30		45.67
Market value per share, beginning balance		54.92	[2]	45.72	[5]	55.24	[5]
Market value per share, ending balance		$ 55.88	[2]	$ 54.92	[2]	$ 45.72	[5]
Total Return, at net asset value		1.40%		21.10%		(17.50%)
Total Return, at market value		1.70%		20.10%		(17.20%)
Ratios to Average Net Assets
Expense ratio		1.03%		1.03%		1.02%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		1.05%		0.46%		(0.36%)
ProShares UltraShort Bloomberg Crude Oil [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 29.79		$ 24.31		$ 31.70
Net investment income (loss)		0.14		0.11		(0.06)
Net realized and unrealized gain (loss)		(17.74)	[1]	5.37		(7.33)
Change in net asset value from operations		(17.60)		5.48		(7.39)
Net asset value, ending balance		12.19		29.79		24.31
Market value per share, beginning balance		29.28	[2]	24.56		31.65
Market value per share, ending balance		$ 12.15	[2]	$ 29.28	[2]	$ 24.56
Total Return, at net asset value		(59.10%)		22.50%		(23.30%)
Total Return, at market value		(58.50%)		19.20%		(22.40%)
Ratios to Average Net Assets
Expense ratio		1.06%		0.98%		0.99%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.88%		0.59%		(0.17%)
ProShares UltraShort Bloomberg Natural Gas [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 21.61		$ 39.48		$ 23.10
Net investment income (loss)		0.08		(0.01)		(0.27)
Net realized and unrealized gain (loss)		16.84	[1]	(17.86)		16.65
Change in net asset value from operations		16.92		(17.87)		16.38
Net asset value, ending balance		38.53		21.61		39.48
Market value per share, beginning balance		21.22	[2]	39.65		23.05
Market value per share, ending balance		$ 38.82	[2]	$ 21.22	[2]	$ 39.65
Total Return, at net asset value		78.30%		(45.30%)		70.90%
Total Return, at market value		82.90%		(46.50%)		72.00%
Ratios to Average Net Assets
Expense ratio		1.57%		1.41%		1.39%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.33%		(0.05%)		(0.81%)
ProShares UltraShort Euro [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 24.27		$ 21.21		$ 27.08
Net investment income (loss)		0.29		0.16		(0.04)
Net realized and unrealized gain (loss)		2.24	[1]	2.90		(5.83)
Change in net asset value from operations		2.53		3.06		(5.87)
Net asset value, ending balance		26.80		24.27		21.21
Market value per share, beginning balance		24.25	[2]	21.20		27.08
Market value per share, ending balance		$ 26.80	[2]	$ 24.25	[2]	$ 21.20
Total Return, at net asset value		10.40%		14.40%		(21.70%)
Total Return, at market value		10.50%		14.40%		(21.70%)
Ratios to Average Net Assets
Expense ratio		0.95%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		1.12%		0.73%		(0.15%)
ProShares UltraShort Gold [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 73.28		$ 70.47		$ 91.33
Net investment income (loss)		0.59		0.47		(0.13)
Net realized and unrealized gain (loss)		(20.85)	[1]	2.34		(20.73)
Change in net asset value from operations		(20.26)		2.81		(20.86)
Net asset value, ending balance		53.02		73.28		70.47
Market value per share, beginning balance		72.84	[2]	69.11		90.54
Market value per share, ending balance		$ 53.21	[2]	$ 72.84	[2]	$ 69.11
Total Return, at net asset value		(27.60%)		4.00%		(22.80%)
Total Return, at market value		(26.90%)		5.40%		(23.70%)
Ratios to Average Net Assets
Expense ratio		0.98%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.94%		0.64%		(0.17%)
ProShares UltraShort Silver [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 37.13		$ 31.71		$ 37.31
Net investment income (loss)		0.31		0.20		(0.06)
Net realized and unrealized gain (loss)		(10.68)	[1]	5.22		(5.54)
Change in net asset value from operations		(10.37)		5.42		(5.60)
Net asset value, ending balance		26.76		37.13		31.71
Market value per share, beginning balance		37.10	[2]	31.40		38.76
Market value per share, ending balance		$ 26.80	[2]	$ 37.10	[2]	$ 31.40
Total Return, at net asset value		(27.90%)		17.10%		(15.00%)
Total Return, at market value		(27.80%)		18.20%		(19.00%)
Ratios to Average Net Assets
Expense ratio		1.00%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		0.90%		0.55%		(0.18%)
ProShares UltraShort Yen [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 73.89		$ 74.93		$ 80.24
Net investment income (loss)		0.87		0.53		(0.14)
Net realized and unrealized gain (loss)		1.61	[1]	(1.57)		(5.17)
Change in net asset value from operations		2.48		(1.04)		(5.31)
Net asset value, ending balance		76.37		73.89		74.93
Market value per share, beginning balance		73.86	[2]	74.98		80.25
Market value per share, ending balance		$ 76.35	[2]	$ 73.86	[2]	$ 74.98
Total Return, at net asset value		3.40%		(1.40%)		(6.60%)
Total Return, at market value		3.40%		(1.50%)		(6.60%)
Ratios to Average Net Assets
Expense ratio		0.95%		0.95%		0.95%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.95%		0.95%		0.95%
Net investment income (loss)		1.17%		0.73%		(0.19%)
ProShares VIX Mid-Term Futures ETF [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 26.65		$ 21.29		$ 42.14
Net investment income (loss)		0.25		0.10		(0.06)
Net realized and unrealized gain (loss)		(5.63)	[1]	5.26		(20.79)
Change in net asset value from operations		(5.38)		5.36		(20.85)
Net asset value, ending balance		21.27		26.65		21.29
Market value per share, beginning balance		26.74	[2]	21.15		42.34
Market value per share, ending balance		$ 21.29	[2]	$ 26.74	[2]	$ 21.15
Total Return, at net asset value		(20.20%)		25.20%		(49.50%)
Total Return, at market value		(20.40%)		26.40%		(50.00%)
Ratios to Average Net Assets
Expense ratio		0.92%		0.97%		0.91%
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.85%		0.85%		0.85%
Net investment income (loss)		1.10%		0.45%		(0.22%)
ProShares VIX Short-Term Futures ETF [Member]
Investment Company, Financial Highlights [Line Items]
Net asset value, beginning balance		$ 38.58		$ 23.34	[3]	$ 84.86	[3]
Net investment income (loss)		0.18		0.08		(0.07)	[3]
Net realized and unrealized gain (loss)		(26.46)	[1]	15.16		(61.45)	[3]
Change in net asset value from operations		(26.28)		15.24		(61.52)	[3]
Net asset value, ending balance		12.30		38.58		23.34	[3]
Market value per share, beginning balance		38.61	[2]	23.15	[3]	85.04	[3]
Market value per share, ending balance		$ 12.43	[2]	$ 38.61	[2]	$ 23.15	[3]
Total Return, at net asset value		(68.10%)		65.30%		(72.50%)	[3]
Total Return, at market value		(67.80%)		66.80%		(72.80%)	[3]
Ratios to Average Net Assets
Expense ratio		0.96%		1.00%		0.96%	[3]
Expense ratio, excluding non-recurring fees and expenses, and brokerage commissions and fees		0.85%		0.85%		0.85%	[3]
Net investment income (loss)		0.90%		0.30%		(0.18%)	[3]
[1]	The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period.
[2]	Market values are determined at the close of the NYSE Arca, which may be later than when the Funds’ net asset value is calculated.
[3]	See Note 1 of these Notes to Financial Statements.
[4]	Expense ratio, excluding non-recurring fees and expense is 1.16%.
[5]	Market values are determined at the close of the NYSE Arca, which may be later than when the Funds’ net asset value is calculated. For ProShares UltraPro 3x Crude Oil ETF and ProShares UltraPro 3x Short Crude Oil ETF, the returns of shares outstanding for the period of commencement of operations through December 31, 2017 are calculated based on the initial offering price upon commencement of operations of $25.00 and $100.00 respectively.
[6]	Expense ratio, excluding non-recurring fees and expense is 1.53%.
[7]	From commencement of operations, March 24, 2017 through December 31, 2017.
[8]	Percentages are not annualized for the period ended December 31, 2017.
[9]	Percentages are annualized.

Financial Highlights - Per Sh_2

Financial Highlights - Per Share Operating Performance (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2019
ProShares Short VIX Short-Term Futures ETF [Member]
Investment Company, Financial Highlights [Line Items]
Expense ratio, excluding non-recurring fees and expenses	1.16%
ProShares Ultra VIX Short-Term Futures ETF [Member]
Investment Company, Financial Highlights [Line Items]
Expense ratio, excluding non-recurring fees and expenses	1.53%

Risk - Additional Information (

Risk - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Unusual Risk or Uncertainty [Line Items]
Inverse correlation, description	The return of a Geared Fund for a period longer than a single day is the result of its return for each day compounded over the period and usually will differ in amount and possibly even direction from one-half the inverse (-0.5x), the inverse (-1x), two times the inverse (-2x), three times the inverse (-3x), one and one-half times (1.5x), two times (2x) or three times of the return (3x) of the Geared Fund’s benchmark for the period.
Ultrashort Fund [Member]
Unusual Risk or Uncertainty [Line Items]
Leverage risk benchmark	50.00%
UltraPro Fund and UltraPro Short Fund [Member]
Unusual Risk or Uncertainty [Line Items]
Leverage risk benchmark	33.00%