v2.4.0.6
STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
ProShares UltraShort DJ-UBS Commodity [Member]
    
Cash flow from operating activities    
Net income (loss) $ 60,032 $ (305,928)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Net sale (purchase) of short-term U.S. government and agency obligations (259,095) 25,255
Change in unrealized appreciation/depreciation on investments 241,608 360,735
Increase (Decrease) in management fee payable 2,437 (548)
Net cash provided by (used in) operating activities 44,982 79,514
Cash flow from financing activities    
Net increase (decrease) in cash 44,982 79,514
Cash, beginning of period 296,119 9,060
Cash, end of period 341,101 88,574
ProShares UltraShort DJ-UBS Crude Oil [Member]
    
Cash flow from operating activities    
Net income (loss) (7,948,186) (5,062,988)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (3,162,226) 1,044,882
Net sale (purchase) of short-term U.S. government and agency obligations (58,428,161) (26,915,022)
Change in unrealized appreciation/depreciation on investments 5,762,292 (153,509)
Decrease (Increase) in receivable on futures contracts   576,597
Increase (Decrease) in management fee payable 176,430 17,467
Increase (Decrease) in payable on futures contracts 371,637  
Net cash provided by (used in) operating activities (63,228,214) (30,492,573)
Cash flow from financing activities    
Proceeds from addition of shares 91,804,047 77,519,159
Payment on shares redeemed (28,133,016) (46,972,250)
Net cash provided by (used in) financing activities 63,671,031 30,546,909
Net increase (decrease) in cash 442,817 54,336
Cash, beginning of period 658,676 265,258
Cash, end of period 1,101,493 319,594
ProShares UltraShort DJ-UBS Natural Gas [Member]
    
Cash flow from operating activities    
Net income (loss) (5,723,203) 10,323,749
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (1,092,470) (4,434,345)
Net sale (purchase) of short-term U.S. government and agency obligations (11,150,709) (12,495,686)
Change in unrealized appreciation/depreciation on investments 224 (388)
Decrease (Increase) in receivable on futures contracts 190,419 (154,659)
Change in offering cost   6,619
Increase (Decrease) in management fee payable 13,807 22,486
Net cash provided by (used in) operating activities (17,761,932) (6,732,224)
Cash flow from financing activities    
Proceeds from addition of shares 19,490,998 13,524,375
Payment on shares redeemed (1,383,116) (8,965,130)
Net cash provided by (used in) financing activities 18,107,882 4,559,245
Net increase (decrease) in cash 345,950 (2,172,979)
Cash, beginning of period 310,060 2,969,266
Cash, end of period 656,010 796,287
ProShares UltraShort Gold [Member]
    
Cash flow from operating activities    
Net income (loss) 5,680,363 (34,950,193)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 2,970 920
Net sale (purchase) of short-term U.S. government and agency obligations (19,580,879) 18,080,638
Change in unrealized appreciation/depreciation on investments 6,975,338 33,023,665
Decrease (Increase) in receivable on futures contracts (2,300)  
Increase (Decrease) in management fee payable 78,554 (7,828)
Increase (Decrease) in payable on futures contracts (3,980)  
Net cash provided by (used in) operating activities (6,849,934) 16,147,202
Cash flow from financing activities    
Proceeds from addition of shares 16,775,145  
Payment on shares redeemed (9,881,815) (16,183,375)
Net cash provided by (used in) financing activities 6,893,330 (16,183,375)
Net increase (decrease) in cash 43,396 (36,173)
Cash, beginning of period 175,194 330,841
Cash, end of period 218,590 294,668
ProShares UltraShort Silver [Member]
    
Cash flow from operating activities    
Net income (loss) 9,909,222 (70,505,864)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 3,300 6,470
Net sale (purchase) of short-term U.S. government and agency obligations (19,143,896) 33,342,943
Change in unrealized appreciation/depreciation on investments 19,055,751 34,284,905
Decrease (Increase) in receivable on futures contracts (2,890)  
Increase (Decrease) in management fee payable 89,524 (1,953)
Increase (Decrease) in payable on futures contracts (2,520)  
Net cash provided by (used in) operating activities 9,908,491 (2,873,499)
Cash flow from financing activities    
Proceeds from addition of shares 27,224,574 164,481,213
Payment on shares redeemed (37,049,487) (161,525,409)
Net cash provided by (used in) financing activities (9,824,913) 2,955,804
Net increase (decrease) in cash 83,578 82,305
Cash, beginning of period 344,378 648,166
Cash, end of period 427,956 730,471
ProShares Short Euro [Member]
    
Cash flow from operating activities    
Net income (loss) 100,346 [1],[2]  
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 3,850 [2]  
Net sale (purchase) of short-term U.S. government and agency obligations 37,779 [2]  
Change in unrealized appreciation/depreciation on investments 160 [2]  
Decrease (Increase) in receivable on futures contracts 6,612 [2]  
Change in offering cost 10,110 [2]  
Decrease (Increase) in Limitation by Sponsor (1,307) [2]  
Increase (Decrease) in payable on futures contracts 12,300 [2]  
Net cash provided by (used in) operating activities 169,850 [2]  
Cash flow from financing activities    
Net increase (decrease) in cash 169,850 [2]  
Cash, beginning of period 302,359 [2]  
Cash, end of period 472,209 [2]  
ProShares UltraShort Australian Dollar [Member]
    
Cash flow from operating activities    
Net income (loss) (91,823) [3],[4]  
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 27,390 [4]  
Net sale (purchase) of short-term U.S. government and agency obligations (27,222) [4]  
Change in unrealized appreciation/depreciation on investments 159 [4]  
Decrease (Increase) in receivable on futures contracts (21,300) [4]  
Change in offering cost 10,110 [4]  
Decrease (Increase) in Limitation by Sponsor (1,341) [4]  
Increase (Decrease) in payable on futures contracts (10,950) [4]  
Net cash provided by (used in) operating activities (114,977) [4]  
Cash flow from financing activities    
Net increase (decrease) in cash (114,977) [4]  
Cash, beginning of period 361,157 [4]  
Cash, end of period 246,180 [4]  
ProShares UltraShort Euro [Member]
    
Cash flow from operating activities    
Net income (loss) 22,769,095 (61,792,796)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Net sale (purchase) of short-term U.S. government and agency obligations 46,239,280 161,336,519
Change in unrealized appreciation/depreciation on investments (26,812,281) 98,451,110
Increase (Decrease) in management fee payable 258,112 (145,931)
Net cash provided by (used in) operating activities 42,454,206 197,848,902
Cash flow from financing activities    
Proceeds from addition of shares 40,321,956 62,553,620
Payment on shares redeemed (82,800,121) (260,060,197)
Net cash provided by (used in) financing activities (42,478,165) (197,506,577)
Net increase (decrease) in cash (23,959) 342,325
Cash, beginning of period 276,372 102,088
Cash, end of period 252,413 444,413
ProShares UltraShort Yen [Member]
    
Cash flow from operating activities    
Net income (loss) 60,564,672 37,727,099
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Net sale (purchase) of short-term U.S. government and agency obligations (100,878,272) (47,351,793)
Change in unrealized appreciation/depreciation on investments 35,385,357 (17,443,625)
Increase (Decrease) in management fee payable 409,085 40,346
Net cash provided by (used in) operating activities (4,519,158) (27,027,973)
Cash flow from financing activities    
Proceeds from addition of shares 67,118,406 87,339,721
Payment on shares redeemed (62,493,620) (60,064,278)
Net cash provided by (used in) financing activities 4,624,786 27,275,443
Net increase (decrease) in cash 105,628 247,470
Cash, beginning of period 363,826 22,338
Cash, end of period 469,454 269,808
ProShares Ultra DJ-UBS Commodity [Member]
    
Cash flow from operating activities    
Net income (loss) (99,267) 77,291
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Net sale (purchase) of short-term U.S. government and agency obligations 2,890,227 372,382
Change in unrealized appreciation/depreciation on investments (421,243) (421,752)
Increase (Decrease) in management fee payable 2,392 265
Net cash provided by (used in) operating activities 2,372,109 28,186
Cash flow from financing activities    
Payment on shares redeemed (1,275,613)  
Net cash provided by (used in) financing activities (1,275,613)  
Net increase (decrease) in cash 1,096,496 28,186
Cash, beginning of period 167,546 59,453
Cash, end of period 1,264,042 87,639
ProShares Ultra DJ-UBS Crude Oil [Member]
    
Cash flow from operating activities    
Net income (loss) 37,021,860 24,000,803
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 9,447,127 (290,132)
Net sale (purchase) of short-term U.S. government and agency obligations 133,651,080 (6,043,146)
Change in unrealized appreciation/depreciation on investments 8,151,508 (2,883,668)
Decrease (Increase) in receivable on futures contracts 1,044,112 (505,200)
Increase (Decrease) in management fee payable 97,262 11,429
Net cash provided by (used in) operating activities 189,412,949 14,290,086
Cash flow from financing activities    
Proceeds from addition of shares 24,265,179 118,655,298
Payment on shares redeemed (214,347,828) (132,934,115)
Net cash provided by (used in) financing activities (190,082,649) (14,278,817)
Net increase (decrease) in cash (669,700) 11,269
Cash, beginning of period 2,198,932 495,671
Cash, end of period 1,529,232 506,940
ProShares Ultra DJ-UBS Natural Gas [Member]
    
Cash flow from operating activities    
Net income (loss) 23,414,359 (20,768,878)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 4,378,210 (8,238,653)
Net sale (purchase) of short-term U.S. government and agency obligations 10,612,320 (25,916,211)
Change in unrealized appreciation/depreciation on investments (1,275) (830)
Change in offering cost   6,619
Increase (Decrease) in management fee payable 59,580 44,013
Increase (Decrease) in payable on futures contracts (4,057,094)  
Net cash provided by (used in) operating activities 34,406,100 (54,873,940)
Cash flow from financing activities    
Proceeds from addition of shares 35,932,249 52,875,334
Payment on shares redeemed (70,895,102)  
Net cash provided by (used in) financing activities (34,962,853) 52,875,334
Net increase (decrease) in cash (556,753) (1,998,606)
Cash, beginning of period 3,385,764 3,361,868
Cash, end of period 2,829,011 1,363,262
ProShares Ultra Gold [Member]
    
Cash flow from operating activities    
Net income (loss) (26,233,564) 45,738,066
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 2,970 2,700
Net sale (purchase) of short-term U.S. government and agency obligations 43,232,276 8,741,989
Change in unrealized appreciation/depreciation on investments (24,865,912) (76,437,538)
Decrease (Increase) in receivable on futures contracts 3,980 (1,740)
Increase (Decrease) in management fee payable 210,040 14,445
Increase (Decrease) in payable on futures contracts 2,300  
Net cash provided by (used in) operating activities (7,647,910) (21,942,078)
Cash flow from financing activities    
Proceeds from addition of shares 7,641,793 47,944,608
Payment on shares redeemed   (26,008,601)
Net cash provided by (used in) financing activities 7,641,793 21,936,007
Net increase (decrease) in cash (6,117) (6,071)
Cash, beginning of period 342,345 400,533
Cash, end of period 336,228 394,462
ProShares Ultra Silver [Member]
    
Cash flow from operating activities    
Net income (loss) (79,680,125) 139,213,584
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 3,300 9,410
Net sale (purchase) of short-term U.S. government and agency obligations 136,068,407 (111,408,608)
Change in unrealized appreciation/depreciation on investments (137,606,367) (132,892,730)
Decrease (Increase) in receivable on futures contracts 2,520 6,000
Increase (Decrease) in management fee payable 486,307 131,385
Increase (Decrease) in payable on futures contracts 2,890  
Net cash provided by (used in) operating activities (80,723,068) (104,940,959)
Cash flow from financing activities    
Proceeds from addition of shares 87,889,563 166,445,210
Payment on shares redeemed (7,301,114) (61,385,275)
Net cash provided by (used in) financing activities 80,588,449 105,059,935
Net increase (decrease) in cash (134,619) 118,976
Cash, beginning of period 890,051 772,442
Cash, end of period 755,432 891,418
ProShares Ultra Australian Dollar [Member]
    
Cash flow from operating activities    
Net income (loss) 64,938 [3],[4]  
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts 24,750 [4]  
Net sale (purchase) of short-term U.S. government and agency obligations (106,168) [4]  
Change in unrealized appreciation/depreciation on investments 159 [4]  
Decrease (Increase) in receivable on futures contracts 12,000 [4]  
Change in offering cost 10,110 [4]  
Decrease (Increase) in Limitation by Sponsor (334) [4]  
Increase (Decrease) in payable on futures contracts 22,982 [4]  
Net cash provided by (used in) operating activities 28,437 [4]  
Cash flow from financing activities    
Net increase (decrease) in cash 28,437 [4]  
Cash, beginning of period 426,634 [4]  
Cash, end of period 455,071 [4]  
ProShares Ultra Euro [Member]
    
Cash flow from operating activities    
Net income (loss) (297,249) 539,780
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Net sale (purchase) of short-term U.S. government and agency obligations 68,002 2,914,612
Change in unrealized appreciation/depreciation on investments 221,177 (812,184)
Increase (Decrease) in management fee payable 3,545 1,045
Net cash provided by (used in) operating activities (4,525) 2,643,253
Cash flow from financing activities    
Proceeds from addition of shares   1,209,580
Payment on shares redeemed   (3,730,012)
Net cash provided by (used in) financing activities   (2,520,432)
Net increase (decrease) in cash (4,525) 122,821
Cash, beginning of period 240,086 10,469
Cash, end of period 235,561 133,290
ProShares Ultra Yen [Member]
    
Cash flow from operating activities    
Net income (loss) (804,414) (765,495)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Net sale (purchase) of short-term U.S. government and agency obligations 1,052,825 529,440
Change in unrealized appreciation/depreciation on investments (423,575) 328,490
Increase (Decrease) in management fee payable 3,411 (506)
Net cash provided by (used in) operating activities (171,753) 91,929
Cash flow from financing activities    
Proceeds from addition of shares 1,323,474  
Payment on shares redeemed (1,180,652)  
Net cash provided by (used in) financing activities 142,822  
Net increase (decrease) in cash (28,931) 91,929
Cash, beginning of period 138,033 5,798
Cash, end of period 109,102 97,727
ProShares VIX Short-Term Futures ETF [Member]
    
Cash flow from operating activities    
Net income (loss) (63,862,766) (60,217,182)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (32,971,498) (46,182,127)
Net sale (purchase) of short-term U.S. government and agency obligations (8,875,959) (43,831,648)
Change in unrealized appreciation/depreciation on investments 71 (2,603)
Decrease (Increase) in receivable on futures contracts   742,451
Change in offering cost   1,090
Increase (Decrease) in management fee payable 142,555 59,145
Increase (Decrease) in payable on futures contracts (29,068,833)  
Net cash provided by (used in) operating activities (134,636,430) (149,430,874)
Cash flow from financing activities    
Proceeds from addition of shares 197,130,250 190,857,830
Payment on shares redeemed (62,230,720) (40,505,855)
Net cash provided by (used in) financing activities 134,899,530 150,351,975
Net increase (decrease) in cash 263,100 921,101
Cash, beginning of period 2,989,958 563,350
Cash, end of period 3,253,058 1,484,451
ProShares VIX Mid-Term Futures ETF [Member]
    
Cash flow from operating activities    
Net income (loss) (10,764,420) (27,660,449)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (9,121,501) (26,948,953)
Net sale (purchase) of short-term U.S. government and agency obligations 30,227,208 15,293,731
Change in unrealized appreciation/depreciation on investments 1,220 (6,101)
Decrease (Increase) in receivable on futures contracts (211,350) 798,319
Change in offering cost   682
Decrease (Increase) in Limitation by Sponsor   2,481
Increase (Decrease) in management fee payable 20,663 81,412
Increase (Decrease) in payable on futures contracts (1,890,675)  
Net cash provided by (used in) operating activities 8,261,145 (38,438,878)
Cash flow from financing activities    
Proceeds from addition of shares 51,106,840 52,467,040
Payment on shares redeemed (60,144,511) (13,518,544)
Net cash provided by (used in) financing activities (9,037,671) 38,948,496
Net increase (decrease) in cash (776,526) 509,618
Cash, beginning of period 2,063,715 627,557
Cash, end of period 1,287,189 1,137,175
ProShares Ultra VIX Short-Term Futures ETF [Member]
    
Cash flow from operating activities    
Net income (loss) (144,849,612) (153,197,701)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (172,363,485) (73,675,384)
Net sale (purchase) of short-term U.S. government and agency obligations (21,339,348) (40,191,164)
Change in unrealized appreciation/depreciation on investments 296,786 4,982,358
Change in offering cost   7,152
Increase (Decrease) in management fee payable 304,837 135,725
Increase (Decrease) in payable on futures contracts (30,704,802) (1,852,966)
Net cash provided by (used in) operating activities (368,655,624) (263,791,980)
Cash flow from financing activities    
Proceeds from addition of shares 626,858,240 343,734,212
Payment on shares redeemed (257,521,767) (77,969,159)
Net cash provided by (used in) financing activities 369,336,473 265,765,053
Net increase (decrease) in cash 680,849 1,973,073
Cash, beginning of period 1,790,825 2,972,032
Cash, end of period 2,471,674 4,945,105
ProShares Short VIX Short-Term Futures ETF [Member]
    
Cash flow from operating activities    
Net income (loss) 28,764,997 7,619,463
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (342,005) (9,593,943)
Net sale (purchase) of short-term U.S. government and agency obligations 7,853,847 (33,582,854)
Change in unrealized appreciation/depreciation on investments 1,662 (251)
Decrease (Increase) in receivable on futures contracts 5,052,699  
Change in offering cost   7,152
Increase (Decrease) in management fee payable 33,669 18,944
Net cash provided by (used in) operating activities 41,364,869 (35,531,489)
Cash flow from financing activities    
Proceeds from addition of shares 129,929,850 101,916,545
Payment on shares redeemed (171,675,379) (68,220,482)
Net cash provided by (used in) financing activities (41,745,529) 33,696,063
Net increase (decrease) in cash (380,660) (1,835,426)
Cash, beginning of period 2,236,726 5,521,055
Cash, end of period 1,856,066 3,685,629
ProShares Trust II [Member]
    
Cash flow from operating activities    
Net income (loss) (152,004,745) (169,987,639)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Decrease (Increase) in segregated cash balances with brokers for futures contracts (205,159,318) (168,299,155)
Net sale (purchase) of short-term U.S. government and agency obligations 172,143,542 (107,098,623)
Change in unrealized appreciation/depreciation on investments (114,037,180) (59,623,916)
Decrease (Increase) in receivable on futures contracts 6,074,502 1,461,768
Change in offering cost 224,229 29,314
Decrease (Increase) in Limitation by Sponsor (2,982) 2,481
Increase (Decrease) in management fee payable 2,392,210 421,341
Increase (Decrease) in payable on futures contracts (65,326,745) (1,852,966)
Increase (Decrease) in payable for offering costs (193,900)  
Net cash provided by (used in) operating activities (355,890,387) (504,947,395)
Cash flow from financing activities    
Proceeds from addition of shares 1,424,812,564 1,481,523,745
Payment on shares redeemed (1,068,314,461) [5] (978,042,682) [5]
Net cash provided by (used in) financing activities 356,498,103 503,481,063
Net increase (decrease) in cash 607,716 (1,466,332)
Cash, beginning of period 19,959,356 19,145,045
Cash, end of period $ 20,567,072 $ 17,678,713
[1] Since the Fund commenced investment operations on June 26, 2012, the Statement of Operations for the three months ended March 31, 2012 has not been provided.
[2] Since the Fund commenced investment operations on June 26, 2012, the Statement of Cash Flows for the three months ended March 31, 2012 has not been provided.
[3] Since the Fund commenced investment operations on July 17, 2012, the Statement of Operations for the three months ended March 31, 2012 has not been provided.
[4] Since the Fund commenced investment operations on July 17, 2012, the Statement of Cash Flows for the three months ended March 31, 2012 has not been provided.
[5] Amount includes $600 of redemptions related the termination of offerings of the New Funds. See Note 1.