v2.4.0.8
Statements of Financial Condition (USD $)
Jun. 30, 2014
Dec. 31, 2013
ProShares UltraShort Bloomberg Commodity [Member]
    
Assets    
Cash $ 331,047 $ 374,245
Short-term U.S. government and agency obligations (Note 3) 2,975,627 3,453,890
Total assets 3,306,674 3,828,135
Liabilities    
Management fee payable 2,539 3,043
Unrealized depreciation on swap agreements 49,719 27,665
Total liabilities 52,258 30,708
Shareholders' equity    
Shareholders' equity 3,254,416 3,797,427
Total liabilities and shareholders' equity 3,306,674 3,828,135
Shares outstanding 59,997 59,997
Net asset value per share $ 54.2430 $ 63.2936
Market value per share (Note 2) $ 52.00 $ 58.41
ProShares UltraShort Bloomberg Crude Oil [Member]
    
Assets    
Cash 4,621,870 1,872,915
Segregated cash balances with brokers for futures contracts 9,154,200 7,633,395
Short-term U.S. government and agency obligations (Note 3) 364,434,603 247,584,623
Receivable on open futures contracts 778,232 1,503,943
Total assets 378,988,905 258,594,876
Liabilities    
Management fee payable 284,168 201,827
Unrealized depreciation on swap agreements 16,105,152 2,332,900
Total liabilities 16,389,320 2,534,727
Shareholders' equity    
Shareholders' equity 362,599,585 256,060,149
Total liabilities and shareholders' equity 378,988,905 258,594,876
Shares outstanding 14,719,944 8,069,944
Net asset value per share $ 24.6332 $ 31.7301
Market value per share (Note 2) $ 24.61 $ 31.58
ProShares UltraShort Bloomberg Natural Gas [Member]
    
Assets    
Cash 4,030,789 564,647
Segregated cash balances with brokers for futures contracts 6,400,680 2,384,800
Short-term U.S. government and agency obligations (Note 3) 44,127,812 18,274,713
Receivable on open futures contracts 0 1,520,548
Total assets 54,559,281 22,744,708
Liabilities    
Payable for capital shares redeemed 4,103,994 0
Payable on open futures contracts 730,316 0
Management fee payable 42,962 9,941
Total liabilities 4,877,272 9,941
Shareholders' equity    
Shareholders' equity 49,682,009 22,734,767
Total liabilities and shareholders' equity 54,559,281 22,744,708
Shares outstanding 1,224,952 324,952
Net asset value per share $ 40.5583 $ 69.9635
Market value per share (Note 2) $ 40.43 $ 69.36
ProShares UltraShort Gold [Member]
    
Assets    
Cash 187,309 197,647
Segregated cash balances with brokers for futures contracts 13,200 15,950
Short-term U.S. government and agency obligations (Note 3) 94,201,223 148,988,329
Unrealized appreciation on forward agreements 0 5,633,053
Receivable on open futures contracts 0 300
Total assets 94,401,732 154,835,279
Liabilities    
Payable for capital shares redeemed 0 15,275,004
Payable on open futures contracts 1,000 0
Management fee payable 74,243 123,819
Unrealized depreciation on forward agreements 10,583,508 0
Total liabilities 10,658,751 15,398,823
Shareholders' equity    
Shareholders' equity 83,742,981 139,436,456
Total liabilities and shareholders' equity 94,401,732 154,835,279
Shares outstanding 996,978 1,346,978
Net asset value per share $ 83.9968 $ 103.5180
Market value per share (Note 2) $ 82.11 $ 103.53
ProShares UltraShort Silver [Member]
    
Assets    
Cash 240,691 461,167
Segregated cash balances with brokers for futures contracts 18,150 22,000
Short-term U.S. government and agency obligations (Note 3) 62,535,124 114,826,066
Receivable on open futures contracts 780 2,450
Total assets 62,794,745 115,311,683
Liabilities    
Management fee payable 41,276 94,140
Unrealized depreciation on forward agreements 10,563,213 2,227,857
Total liabilities 10,604,489 2,321,997
Shareholders' equity    
Shareholders' equity 52,190,256 112,989,686
Total liabilities and shareholders' equity 62,794,745 115,311,683
Shares outstanding 708,489 1,258,489
Net asset value per share $ 73.6642 $ 89.7820
Market value per share (Note 2) $ 72.05 $ 90.19
ProShares Short Euro [Member]
    
Assets    
Cash 1,332,692 863,980
Segregated cash balances with brokers for futures contracts 182,600 128,700
Short-term U.S. government and agency obligations (Note 3) 12,790,157 7,902,056
Receivable on open futures contracts 0 9,100
Total assets 14,305,449 8,903,836
Liabilities    
Payable on open futures contracts 49,240 0
Management fee payable 10,786 6,994
Total liabilities 60,026 6,994
Shareholders' equity    
Shareholders' equity 14,245,423 8,896,842
Total liabilities and shareholders' equity 14,305,449 8,903,836
Shares outstanding 400,005 250,005
Net asset value per share $ 35.6131 $ 35.5867
Market value per share (Note 2) $ 35.66 $ 35.66
ProShares UltraShort Australian Dollar [Member]
    
Assets    
Cash 1,684,142 2,751,320
Segregated cash balances with brokers for futures contracts 707,850 1,141,635
Short-term U.S. government and agency obligations (Note 3) 17,768,429 24,198,507
Total assets 20,160,421 28,091,462
Liabilities    
Payable on open futures contracts 17,160 86,166
Management fee payable 15,960 22,017
Total liabilities 33,120 108,183
Shareholders' equity    
Shareholders' equity 20,127,301 27,983,279
Total liabilities and shareholders' equity 20,160,421 28,091,462
Shares outstanding 500,005 600,005
Net asset value per share $ 40.2542 $ 46.6384
Market value per share (Note 2) $ 40.29 $ 46.66
ProShares UltraShort Euro [Member]
    
Assets    
Cash 224,155 218,940
Short-term U.S. government and agency obligations (Note 3) 445,869,168 437,847,159
Unrealized appreciation on foreign currency forward contracts 327,971 151,351
Total assets 446,421,294 438,217,450
Liabilities    
Payable for capital shares redeemed 0 5,971,084
Management fee payable 349,087 345,393
Unrealized depreciation on foreign currency forward contracts 5,915,312 13,899,858
Total liabilities 6,264,399 20,216,335
Shareholders' equity    
Shareholders' equity 440,156,895 418,001,115
Total liabilities and shareholders' equity 446,421,294 438,217,450
Shares outstanding 25,800,014 24,500,014
Net asset value per share $ 17.0603 $ 17.0613
Market value per share (Note 2) $ 17.05 $ 17.06
ProShares UltraShort Yen [Member]
    
Assets    
Cash 375,511 575,108
Short-term U.S. government and agency obligations (Note 3) 363,176,364 558,597,264
Unrealized appreciation on foreign currency forward contracts 480,205 31,317,568
Total assets 364,032,080 590,489,940
Liabilities    
Management fee payable 287,050 437,540
Unrealized depreciation on foreign currency forward contracts 10,127,815 1,930,884
Total liabilities 10,414,865 2,368,424
Shareholders' equity    
Shareholders' equity 353,617,215 588,121,516
Total liabilities and shareholders' equity 364,032,080 590,489,940
Shares outstanding 5,449,294 8,299,294
Net asset value per share $ 64.8923 $ 70.8640
Market value per share (Note 2) $ 64.89 $ 70.91
ProShares Ultra Bloomberg Commodity [Member]
    
Assets    
Cash 1,233,080 85,642
Short-term U.S. government and agency obligations (Note 3) 3,166,730 2,816,688
Unrealized appreciation on swap agreements 14,121 15,078
Total assets 4,413,931 2,917,408
Liabilities    
Management fee payable 2,736 2,374
Unrealized depreciation on swap agreements 5,077 0
Total liabilities 7,813 2,374
Shareholders' equity    
Shareholders' equity 4,406,118 2,915,034
Total liabilities and shareholders' equity 4,413,931 2,917,408
Shares outstanding 200,014 150,014
Net asset value per share $ 22.0290 $ 19.4317
Market value per share (Note 2) $ 22.02 $ 19.13
ProShares Ultra Bloomberg Crude Oil [Member]
    
Assets    
Cash 2,539,909 689,596
Segregated cash balances with brokers for futures contracts 2,639,670 3,821,895
Short-term U.S. government and agency obligations (Note 3) 92,959,952 137,435,610
Unrealized appreciation on swap agreements 4,111,030 1,957,893
Total assets 102,250,561 143,904,994
Liabilities    
Payable for capital shares redeemed 3,918,076 0
Payable on open futures contracts 313,787 997,210
Management fee payable 75,005 134,355
Total liabilities 4,306,868 1,131,565
Shareholders' equity    
Shareholders' equity 97,943,693 142,773,429
Total liabilities and shareholders' equity 102,250,561 143,904,994
Shares outstanding 2,499,170 4,449,170
Net asset value per share $ 39.1905 $ 32.0899
Market value per share (Note 2) $ 39.19 $ 32.22
ProShares Ultra Bloomberg Natural Gas [Member]
    
Assets    
Cash 570,487 3,102,827
Segregated cash balances with brokers for futures contracts 2,725,580 6,602,200
Short-term U.S. government and agency obligations (Note 3) 15,519,463 58,921,011
Receivable from capital shares sold 2,251,958 0
Receivable on open futures contracts 111,842 0
Total assets 21,179,330 68,626,038
Liabilities    
Payable on open futures contracts 0 5,628,532
Management fee payable 15,496 81,727
Total liabilities 15,496 5,710,259
Shareholders' equity    
Shareholders' equity 21,163,834 62,915,779
Total liabilities and shareholders' equity 21,179,330 68,626,038
Shares outstanding 469,941 1,619,941
Net asset value per share $ 45.0351 $ 38.8383
Market value per share (Note 2) $ 45.02 $ 39.28
ProShares Ultra Gold [Member]
    
Assets    
Cash 123,566 142,566
Segregated cash balances with brokers for futures contracts 13,200 15,950
Short-term U.S. government and agency obligations (Note 3) 122,192,435 140,880,950
Unrealized appreciation on forward agreements 13,227,915 0
Total assets 135,557,116 141,039,466
Liabilities    
Payable for capital shares redeemed 0 2,097,225
Payable on open futures contracts 120 300
Management fee payable 98,872 111,562
Unrealized depreciation on forward agreements 0 6,812,974
Total liabilities 98,992 9,022,061
Shareholders' equity    
Shareholders' equity 135,458,124 132,017,405
Total liabilities and shareholders' equity 135,557,116 141,039,466
Shares outstanding 2,800,014 3,200,014
Net asset value per share $ 48.3777 $ 41.2553
Market value per share (Note 2) $ 49.41 $ 41.26
ProShares Ultra Silver [Member]
    
Assets    
Cash 423,250 463,001
Segregated cash balances with brokers for futures contracts 9,075 22,000
Short-term U.S. government and agency obligations (Note 3) 424,515,400 467,868,976
Unrealized appreciation on forward agreements 86,902,211 0
Total assets 511,849,936 468,353,977
Liabilities    
Payable for capital shares redeemed 10,478,109 0
Payable on open futures contracts 575 2,450
Management fee payable 368,616 379,128
Unrealized depreciation on forward agreements 0 2,492,880
Total liabilities 10,847,300 2,874,458
Shareholders' equity    
Shareholders' equity 501,002,636 465,479,519
Total liabilities and shareholders' equity 511,849,936 468,353,977
Shares outstanding 7,146,533 7,350,007
Net asset value per share $ 70.1043 $ 63.3305
Market value per share (Note 2) $ 71.76 $ 63.04
ProShares Ultra Australian Dollar [Member]
    
Assets    
Cash 377,409 314,796
Segregated cash balances with brokers for futures contracts 127,050 128,865
Short-term U.S. government and agency obligations (Note 3) 3,087,416 2,716,439
Receivable on open futures contracts 3,080 10,650
Total assets 3,594,955 3,170,750
Liabilities    
Management fee payable 2,766 2,585
Total liabilities 2,766 2,585
Shareholders' equity    
Shareholders' equity 3,592,189 3,168,165
Total liabilities and shareholders' equity 3,594,955 3,170,750
Shares outstanding 100,005 100,005
Net asset value per share $ 35.9201 $ 31.6801
Market value per share (Note 2) $ 35.65 $ 31.61
ProShares Ultra Euro [Member]
    
Assets    
Cash 51,380 49,723
Short-term U.S. government and agency obligations (Note 3) 2,486,772 2,455,863
Unrealized appreciation on foreign currency forward contracts 31,105 120,908
Total assets 2,569,257 2,626,494
Liabilities    
Management fee payable 1,978 2,721
Unrealized depreciation on foreign currency forward contracts 378 19,946
Total liabilities 2,356 22,667
Shareholders' equity    
Shareholders' equity 2,566,901 2,603,827
Total liabilities and shareholders' equity 2,569,257 2,626,494
Shares outstanding 100,014 100,014
Net asset value per share $ 25.6654 $ 26.0346
Market value per share (Note 2) $ 25.80 $ 25.98
ProShares Ultra Yen [Member]
    
Assets    
Cash 466,281 28,116
Short-term U.S. government and agency obligations (Note 3) 1,479,818 2,928,556
Unrealized appreciation on foreign currency forward contracts 76,915 4,052
Total assets 2,023,014 2,960,724
Liabilities    
Management fee payable 1,767 2,337
Unrealized depreciation on foreign currency forward contracts 24,196 163,361
Total liabilities 25,963 165,698
Shareholders' equity    
Shareholders' equity 1,997,051 2,795,026
Total liabilities and shareholders' equity 2,023,014 2,960,724
Shares outstanding 100,014 150,014
Net asset value per share $ 19.9677 $ 18.6318
Market value per share (Note 2) $ 20.07 $ 18.61
ProShares VIX Short-Term Futures ETF [Member]
    
Assets    
Cash 1,114,662 4,333,752
Segregated cash balances with brokers for futures contracts 20,781,600 64,020,350
Short-term U.S. government and agency obligations (Note 3) 77,584,126 207,636,383
Receivable on open futures contracts 0 3,179,017
Total assets 99,480,388 279,169,502
Liabilities    
Payable for capital shares redeemed 0 8,562,195
Payable on open futures contracts 1,041,667 0
Management fee payable 73,961 208,753
Total liabilities 1,115,628 8,770,948
Shareholders' equity    
Shareholders' equity 98,364,760 270,398,554
Total liabilities and shareholders' equity 99,480,388 279,169,502
Shares outstanding 5,174,812 9,474,812
Net asset value per share $ 19.0084 $ 28.5387
Market value per share (Note 2) $ 19.03 $ 28.53
ProShares VIX Mid-Term Futures ETF [Member]
    
Assets    
Cash 848,717 1,906,397
Segregated cash balances with brokers for futures contracts 5,859,000 8,454,390
Short-term U.S. government and agency obligations (Note 3) 34,381,263 46,040,233
Receivable on open futures contracts 0 100,734
Total assets 41,088,980 56,501,754
Liabilities    
Payable for capital shares redeemed 0 5,321,983
Payable on open futures contracts 522,035 0
Management fee payable 30,951 45,448
Total liabilities 552,986 5,367,431
Shareholders' equity    
Shareholders' equity 40,535,994 51,134,323
Total liabilities and shareholders' equity 41,088,980 56,501,754
Shares outstanding 2,625,005 2,650,005
Net asset value per share $ 15.4423 $ 19.2959
Market value per share (Note 2) $ 15.47 $ 19.29
ProShares Ultra VIX Short-Term Futures ETF [Member]
    
Assets    
Cash 7,445,536 2,240,977
Segregated cash balances with brokers for futures contracts 124,654,800 107,101,750
Short-term U.S. government and agency obligations (Note 3) 177,916,427 109,533,487
Receivable from service provider 925,804 0
Receivable from capital shares sold 2,656,221 10,903,664
Total assets 313,598,788 229,779,878
Liabilities    
Payable for capital shares redeemed 12,373,261 0
Payable on open futures contracts 5,702,682 3,356,803
Management fee payable 261,598 189,491
Total liabilities 18,337,541 3,546,294
Shareholders' equity    
Shareholders' equity 295,261,247 226,233,584
Total liabilities and shareholders' equity 313,598,788 229,779,878
Shares outstanding 11,120,099 3,372,389
Net asset value per share $ 26.5520 $ 67.0841
Market value per share (Note 2) $ 26.62 $ 67.12
ProShares Short VIX Short-Term Futures ETF [Member]
    
Assets    
Cash 1,536,366 2,153,370
Segregated cash balances with brokers for futures contracts 38,188,800 33,552,650
Short-term U.S. government and agency obligations (Note 3) 150,294,400 105,559,022
Receivable from capital shares sold 8,841,998 0
Receivable on open futures contracts 0 603,833
Total assets 198,861,564 141,868,875
Liabilities    
Payable for capital shares redeemed 17,441,983 0
Payable on open futures contracts 14,181 0
Management fee payable 168,886 117,673
Total liabilities 17,625,050 117,673
Shareholders' equity    
Shareholders' equity 181,236,514 141,751,202
Total liabilities and shareholders' equity 198,861,564 141,868,875
Shares outstanding 2,050,040 2,100,040
Net asset value per share $ 88.4063 $ 67.4993
Market value per share (Note 2) $ 88.27 $ 67.47
ProShares Trust II [Member]
    
Assets    
Cash 29,758,849 23,390,732
Segregated cash balances with brokers for futures contracts 211,475,455 235,046,530
Short-term U.S. government and agency obligations (Note 3) 2,513,462,709 2,846,465,825
Unrealized appreciation on swap agreements 4,125,151 1,972,971
Unrealized appreciation on forward agreements 100,130,126 5,633,053
Unrealized appreciation on foreign currency forward contracts 916,196 31,593,879
Receivable from service provider 925,804  
Receivable from capital shares sold 13,750,177 10,903,664
Receivable on open futures contracts 893,934 6,930,575
Total assets 2,875,438,401 3,161,937,229
Liabilities    
Payable for capital shares redeemed 48,315,423 37,227,491
Payable on open futures contracts 8,392,763 10,071,461
Management fee payable 2,210,703 2,522,868
Unrealized depreciation on swap agreements 16,159,948 2,360,565
Unrealized depreciation on forward agreements 21,146,721 11,533,711
Unrealized depreciation on foreign currency forward contracts 16,067,701 16,014,049
Total liabilities 112,293,259 79,730,145
Shareholders' equity    
Shareholders' equity 2,763,145,142 3,082,207,084
Total liabilities and shareholders' equity $ 2,875,438,401 $ 3,161,937,229
Shares outstanding 84,245,339 79,426,103