v2.4.0.8
Statements of Financial Condition (USD $)
Mar. 31, 2014
Dec. 31, 2013
ProShares UltraShort DJ-UBS Commodity [Member]
    
Assets    
Cash $ 697,377 $ 374,245
Short-term U.S. government and agency obligations (Note 3) 2,486,733 3,453,890
Unrealized appreciation on swap agreements 102,269  
Total assets 3,286,379 3,828,135
Liabilities    
Management fee payable 2,649 3,043
Unrealized depreciation on swap agreements   27,665
Total liabilities 2,649 30,708
Shareholders' equity    
Shareholders' equity 3,283,730 3,797,427
Total liabilities and shareholders' equity 3,286,379 3,828,135
Shares outstanding 59,997 59,997
Net asset value per share $ 54.7316 $ 63.2936
Market value per share $ 55.25 $ 58.41
ProShares UltraShort DJ-UBS Crude Oil [Member]
    
Assets    
Cash 3,980,858 1,872,915
Segregated cash balances with brokers for futures contracts 9,384,320 7,633,395
Short-term U.S. government and agency obligations (Note 3) 288,258,596 247,584,623
Unrealized appreciation on swap agreements 71,219  
Receivable from capital shares sold 17,154,728  
Receivable on open futures contracts 345,825 1,503,943
Total assets 319,195,546 258,594,876
Liabilities    
Management fee payable 260,593 201,827
Unrealized depreciation on swap agreements 764,150 2,332,900
Total liabilities 1,024,743 2,534,727
Shareholders' equity    
Shareholders' equity 318,170,803 256,060,149
Total liabilities and shareholders' equity 319,195,546 258,594,876
Shares outstanding 11,169,944 8,069,944
Net asset value per share $ 28.4845 $ 31.7301
Market value per share $ 28.54 $ 31.58
ProShares UltraShort DJ-UBS Natural Gas [Member]
    
Assets    
Cash 2,998,409 564,647
Segregated cash balances with brokers for futures contracts 11,104,500 2,384,800
Short-term U.S. government and agency obligations (Note 3) 56,753,250 18,274,713
Receivable on open futures contracts 2,752,495 1,520,548
Total assets 73,608,654 22,744,708
Liabilities    
Management fee payable 64,110 9,941
Total liabilities 64,110 9,941
Shareholders' equity    
Shareholders' equity 73,544,544 22,734,767
Total liabilities and shareholders' equity 73,608,654 22,744,708
Shares outstanding 1,674,952 324,952
Net asset value per share $ 43.9084 $ 69.9635
Market value per share $ 43.71 $ 69.36
ProShares UltraShort Gold [Member]
    
Assets    
Cash 212,051 197,647
Segregated cash balances with brokers for futures contracts 15,950 15,950
Short-term U.S. government and agency obligations (Note 3) 105,840,656 148,988,329
Unrealized appreciation on forward agreements 8,531,762 5,633,053
Receivable on open futures contracts 2,100 300
Total assets 114,602,519 154,835,279
Liabilities    
Payable for capital shares redeemed   15,275,004
Management fee payable 85,245 123,819
Total liabilities 85,245 15,398,823
Shareholders' equity    
Shareholders' equity 114,517,274 139,436,456
Total liabilities and shareholders' equity 114,602,519 154,835,279
Shares outstanding 1,296,978 1,346,978
Net asset value per share $ 88.2955 $ 103.5180
Market value per share $ 89.45 $ 103.53
ProShares UltraShort Silver [Member]
    
Assets    
Cash 269,479 461,167
Segregated cash balances with brokers for futures contracts 22,000 22,000
Short-term U.S. government and agency obligations (Note 3) 67,188,850 114,826,066
Unrealized appreciation on forward agreements 7,742,580  
Receivable on open futures contracts   2,450
Total assets 75,222,909 115,311,683
Liabilities    
Payable for capital shares redeemed 4,135,426  
Payable on open futures contracts 440  
Management fee payable 62,762 94,140
Unrealized depreciation on forward agreements   2,227,857
Total liabilities 4,198,628 2,321,997
Shareholders' equity    
Shareholders' equity 71,024,281 112,989,686
Total liabilities and shareholders' equity 75,222,909 115,311,683
Shares outstanding 858,489 1,258,489
Net asset value per share $ 82.7317 $ 89.7820
Market value per share $ 84.24 $ 90.19
ProShares Short Euro [Member]
    
Assets    
Cash 791,550 863,980
Segregated cash balances with brokers for futures contracts 101,475 128,700
Short-term U.S. government and agency obligations (Note 3) 6,227,257 7,902,056
Receivable on open futures contracts   9,100
Total assets 7,120,282 8,903,836
Liabilities    
Payable on open futures contracts 12,300  
Management fee payable 5,712 6,994
Total liabilities 18,012 6,994
Shareholders' equity    
Shareholders' equity 7,102,270 8,896,842
Total liabilities and shareholders' equity 7,120,282 8,903,836
Shares outstanding 200,005 250,005
Net asset value per share $ 35.5105 $ 35.5867
Market value per share $ 35.58 $ 35.66
ProShares UltraShort Australian Dollar [Member]
    
Assets    
Cash 1,112,402 2,751,320
Segregated cash balances with brokers for futures contracts 934,065 1,141,635
Short-term U.S. government and agency obligations (Note 3) 19,227,467 24,198,507
Total assets 21,273,934 28,091,462
Liabilities    
Payable on open futures contracts 89,099 86,166
Management fee payable 19,101 22,017
Total liabilities 108,200 108,183
Shareholders' equity    
Shareholders' equity 21,165,734 27,983,279
Total liabilities and shareholders' equity 21,273,934 28,091,462
Shares outstanding 500,005 600,005
Net asset value per share $ 42.3310 $ 46.6384
Market value per share $ 42.27 $ 46.66
ProShares UltraShort Euro [Member]
    
Assets    
Cash 206,909 218,940
Short-term U.S. government and agency obligations (Note 3) 414,310,854 437,847,159
Unrealized appreciation on foreign currency forward contracts   151,351
Total assets 414,517,763 438,217,450
Liabilities    
Payable for capital shares redeemed   5,971,084
Management fee payable 327,395 345,393
Unrealized depreciation on foreign currency forward contracts 3,724,310 13,899,858
Total liabilities 4,051,705 20,216,335
Shareholders' equity    
Shareholders' equity 410,466,058 418,001,115
Total liabilities and shareholders' equity 414,517,763 438,217,450
Shares outstanding 24,250,014 24,500,014
Net asset value per share $ 16.9264 $ 17.0613
Market value per share $ 16.93 $ 17.06
ProShares UltraShort Yen [Member]
    
Assets    
Cash 400,052 575,108
Short-term U.S. government and agency obligations (Note 3) 400,736,540 558,597,264
Unrealized appreciation on foreign currency forward contracts 6,121,534 31,317,568
Total assets 407,258,126 590,489,940
Liabilities    
Management fee payable 332,390 437,540
Unrealized depreciation on foreign currency forward contracts 1,275,150 1,930,884
Total liabilities 1,607,540 2,368,424
Shareholders' equity    
Shareholders' equity 405,650,586 588,121,516
Total liabilities and shareholders' equity 407,258,126 590,489,940
Shares outstanding 5,999,294 8,299,294
Net asset value per share $ 67.6164 $ 70.8640
Market value per share $ 67.62 $ 70.91
ProShares Ultra DJ-UBS Commodity [Member]
    
Assets    
Cash 1,022,219 85,642
Short-term U.S. government and agency obligations (Note 3) 2,410,896 2,816,688
Unrealized appreciation on swap agreements   15,078
Total assets 3,433,115 2,917,408
Liabilities    
Management fee payable 2,683 2,374
Unrealized depreciation on swap agreements 114,128  
Total liabilities 116,811 2,374
Shareholders' equity    
Shareholders' equity 3,316,304 2,915,034
Total liabilities and shareholders' equity 3,433,115 2,917,408
Shares outstanding 150,014 150,014
Net asset value per share $ 22.1066 $ 19.4317
Market value per share $ 21.51 $ 19.13
ProShares Ultra DJ-UBS Crude Oil [Member]
    
Assets    
Cash 1,682,198 689,596
Segregated cash balances with brokers for futures contracts 2,925,780 3,821,895
Short-term U.S. government and agency obligations (Note 3) 112,053,990 137,435,610
Unrealized appreciation on swap agreements 959,951 1,957,893
Receivable on open futures contracts 121,862  
Total assets 117,743,781 143,904,994
Liabilities    
Payable for capital shares redeemed 15,537,458  
Payable on open futures contracts   997,210
Management fee payable 88,195 134,355
Total liabilities 15,625,653 1,131,565
Shareholders' equity    
Shareholders' equity 102,118,128 142,773,429
Total liabilities and shareholders' equity 117,743,781 143,904,994
Shares outstanding 2,949,170 4,449,170
Net asset value per share $ 34.6261 $ 32.0899
Market value per share $ 34.56 $ 32.22
ProShares Ultra DJ-UBS Natural Gas [Member]
    
Assets    
Cash 803,776 3,102,827
Segregated cash balances with brokers for futures contracts 3,204,300 6,602,200
Short-term U.S. government and agency obligations (Note 3) 18,277,978 58,921,011
Total assets 22,286,054 68,626,038
Liabilities    
Payable on open futures contracts 1,050,517 5,628,532
Management fee payable 23,687 81,727
Total liabilities 1,074,204 5,710,259
Shareholders' equity    
Shareholders' equity 21,211,850 62,915,779
Total liabilities and shareholders' equity 22,286,054 68,626,038
Shares outstanding 469,941 1,619,941
Net asset value per share $ 45.1373 $ 38.8383
Market value per share $ 45.32 $ 39.28
ProShares Ultra Gold [Member]
    
Assets    
Cash 147,280 142,566
Segregated cash balances with brokers for futures contracts 15,950 15,950
Short-term U.S. government and agency obligations (Note 3) 148,339,252 140,880,950
Total assets 148,502,482 141,039,466
Liabilities    
Payable for capital shares redeemed   2,097,225
Payable on open futures contracts 2,200 300
Management fee payable 120,107 111,562
Unrealized depreciation on forward agreements 12,010,072 6,812,974
Total liabilities 12,132,379 9,022,061
Shareholders' equity    
Shareholders' equity 136,370,103 132,017,405
Total liabilities and shareholders' equity 148,502,482 141,039,466
Shares outstanding 2,900,014 3,200,014
Net asset value per share $ 47.0239 $ 41.2553
Market value per share $ 46.34 $ 41.26
ProShares Ultra Silver [Member]
    
Assets    
Cash 530,530 463,001
Segregated cash balances with brokers for futures contracts 22,000 22,000
Short-term U.S. government and agency obligations (Note 3) 530,701,182 467,868,976
Receivable from capital shares sold 9,786,524  
Total assets 541,040,236 468,353,977
Liabilities    
Payable on open futures contracts 380 2,450
Management fee payable 416,258 379,128
Unrealized depreciation on forward agreements 58,138,361 2,492,880
Total liabilities 58,554,999 2,874,458
Shareholders' equity    
Shareholders' equity 482,485,237 465,479,519
Total liabilities and shareholders' equity 541,040,236 468,353,977
Shares outstanding 7,396,533 7,350,007
Net asset value per share $ 65.2313 $ 63.3305
Market value per share $ 64.12 $ 63.04
ProShares Ultra Australian Dollar [Member]
    
Assets    
Cash 505,170 314,796
Segregated cash balances with brokers for futures contracts 152,625 128,865
Short-term U.S. government and agency obligations (Note 3) 2,775,892 2,716,439
Receivable on open futures contracts 13,503 10,650
Total assets 3,447,190 3,170,750
Liabilities    
Management fee payable 2,654 2,585
Total liabilities 2,654 2,585
Shareholders' equity    
Shareholders' equity 3,444,536 3,168,165
Total liabilities and shareholders' equity 3,447,190 3,170,750
Shares outstanding 100,005 100,005
Net asset value per share $ 34.4436 $ 31.6801
Market value per share $ 34.46 $ 31.61
ProShares Ultra Euro [Member]
    
Assets    
Cash 276,678 49,723
Short-term U.S. government and agency obligations (Note 3) 2,307,737 2,455,863
Unrealized appreciation on foreign currency forward contracts 21,019 120,908
Total assets 2,605,434 2,626,494
Liabilities    
Management fee payable 2,117 2,721
Unrealized depreciation on foreign currency forward contracts 35 19,946
Total liabilities 2,152 22,667
Shareholders' equity    
Shareholders' equity 2,603,282 2,603,827
Total liabilities and shareholders' equity 2,605,434 2,626,494
Shares outstanding 100,014 100,014
Net asset value per share $ 26.0292 $ 26.0346
Market value per share $ 25.98 $ 25.98
ProShares Ultra Yen [Member]
    
Assets    
Cash 467,904 28,116
Short-term U.S. government and agency obligations (Note 3) 2,471,851 2,928,556
Unrealized appreciation on foreign currency forward contracts 1,004 4,052
Total assets 2,940,759 2,960,724
Liabilities    
Management fee payable 2,383 2,337
Unrealized depreciation on foreign currency forward contracts 42,233 163,361
Total liabilities 44,616 165,698
Shareholders' equity    
Shareholders' equity 2,896,143 2,795,026
Total liabilities and shareholders' equity 2,940,759 2,960,724
Shares outstanding 150,014 150,014
Net asset value per share $ 19.3058 $ 18.6318
Market value per share $ 19.29 $ 18.61
ProShares VIX Short-Term Futures ETF [Member]
    
Assets    
Cash 1,867,520 4,333,752
Segregated cash balances with brokers for futures contracts 24,889,000 64,020,350
Short-term U.S. government and agency obligations (Note 3) 94,150,810 207,636,383
Receivable on open futures contracts   3,179,017
Total assets 120,907,330 279,169,502
Liabilities    
Payable for capital shares redeemed   8,562,195
Payable on open futures contracts 3,088,786  
Management fee payable 86,075 208,753
Total liabilities 3,174,861 8,770,948
Shareholders' equity    
Shareholders' equity 117,732,469 270,398,554
Total liabilities and shareholders' equity 120,907,330 279,169,502
Shares outstanding 4,174,812 9,474,812
Net asset value per share $ 28.2007 $ 28.5387
Market value per share $ 28.10 $ 28.53
ProShares VIX Mid-Term Futures ETF [Member]
    
Assets    
Cash 1,019,417 1,906,397
Segregated cash balances with brokers for futures contracts 9,129,600 8,454,390
Short-term U.S. government and agency obligations (Note 3) 48,695,771 46,040,233
Receivable on open futures contracts   100,734
Total assets 58,844,788 56,501,754
Liabilities    
Payable for capital shares redeemed   5,321,983
Payable on open futures contracts 1,009,664  
Management fee payable 42,307 45,448
Total liabilities 1,051,971 5,367,431
Shareholders' equity    
Shareholders' equity 57,792,817 51,134,323
Total liabilities and shareholders' equity 58,844,788 56,501,754
Shares outstanding 3,125,005 2,650,005
Net asset value per share $ 18.4937 $ 19.2959
Market value per share $ 18.50 $ 19.29
ProShares Ultra VIX Short-Term Futures ETF [Member]
    
Assets    
Cash 3,547,934 2,240,977
Segregated cash balances with brokers for futures contracts 134,046,000 107,101,750
Short-term U.S. government and agency obligations (Note 3) 173,853,508 109,533,487
Receivable from service provider 925,804  
Receivable from capital shares sold 30,154,522 10,903,664
Total assets 342,527,768 229,779,878
Liabilities    
Payable on open futures contracts 24,525,510 3,356,803
Management fee payable 233,818 189,491
Total liabilities 24,759,328 3,546,294
Shareholders' equity    
Shareholders' equity 317,768,440 226,233,584
Total liabilities and shareholders' equity 342,527,768 229,779,878
Shares outstanding 5,270,099 3,372,389
Net asset value per share $ 60.2965 $ 67.0841
Market value per share $ 59.91 $ 67.12
ProShares Short VIX Short-Term Futures ETF [Member]
    
Assets    
Cash 5,087,077 2,153,370
Segregated cash balances with brokers for futures contracts 44,907,500 33,552,650
Short-term U.S. government and agency obligations (Note 3) 169,490,113 105,559,022
Receivable on open futures contracts 6,484,331 603,833
Total assets 225,969,021 141,868,875
Liabilities    
Payable for capital shares redeemed 12,370,194  
Management fee payable 182,261 117,673
Total liabilities 12,552,455 117,673
Shareholders' equity    
Shareholders' equity 213,416,566 141,751,202
Total liabilities and shareholders' equity 225,969,021 141,868,875
Shares outstanding 3,450,040 2,100,040
Net asset value per share $ 61.8592 $ 67.4993
Market value per share $ 61.97 $ 67.47
ProShares Trust II [Member]
    
Assets    
Cash 27,626,790 23,390,732
Segregated cash balances with brokers for futures contracts 240,855,065 235,046,530
Short-term U.S. government and agency obligations (Note 3) 2,666,559,183 2,846,465,825
Unrealized appreciation on swap agreements 1,133,439 1,972,971
Unrealized appreciation on forward agreements 16,274,342 5,633,053
Unrealized appreciation on foreign currency forward contracts 6,143,557 31,593,879
Receivable from service provider 925,804  
Receivable from capital shares sold 57,095,774 10,903,664
Receivable on open futures contracts 9,720,116 6,930,575
Total assets 3,026,334,070 3,161,937,229
Liabilities    
Payable for capital shares redeemed 32,043,078 37,227,491
Payable on open futures contracts 29,778,896 10,071,461
Management fee payable 2,362,502 2,522,868
Unrealized depreciation on swap agreements 878,278 2,360,565
Unrealized depreciation on forward agreements 70,148,433 11,533,711
Unrealized depreciation on foreign currency forward contracts 5,041,728 16,014,049
Total liabilities 140,252,915 79,730,145
Shareholders' equity    
Shareholders' equity 2,886,081,155 3,082,207,084
Total liabilities and shareholders' equity $ 3,026,334,070 $ 3,161,937,229
Shares outstanding 76,245,339 79,426,103