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Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flow from operating activities      
Net income (loss) $ (1,195,750,777) [1] $ (1,244,268,436) [2] $ (237,738,711)
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 80,870,728 [1] 35,477,903 [2] (61,515,085)
Purchases of short-term U.S. government and agency obligations (18,373,450,463) [1] (17,070,603,480) [2] (12,667,505,150)
Proceeds from sales or maturities of short-term U.S government and agency obligations 18,657,310,693 [1] 16,764,420,326 [2] 12,509,293,100
Net amortization and accretion on short-term U.S government and agency obligations (9,128,007) [1] (1,530,269) [2] (1,148,962)
Net realized gain (loss) on investments 15,768 [1] (47,732) [2] (123,212)
Change in unrealized appreciation/depreciation on investments (179,899,377) [1] 79,893,405 [2] 55,258,334
Decrease (Increase) in receivable on futures contracts (14,207,535) [1] 28,346,999 [2] (49,071,751)
Decrease (Increase) in Limitation by Sponsor   9,474 [2] (9,474)
Change in offering cost   49,384 [2] (49,384)
Increase (Decrease) in payable to Sponsor (116,609) [1] 181,800 [2] 134,637
Increase (Decrease) in brokerage commissions and fees payable (36,239) [1] 39,148 [2]  
Increase (Decrease) in payable on futures contracts 894,352 [1] (43,327,729) [2] 36,334,537
Increase (Decrease) in payable for offering costs   (65,785) [2] 65,785
Net cash provided by (used in) operating activities (1,033,497,466) [1] (1,451,424,992) [2] (416,075,336)
Cash flow from financing activities      
Proceeds from addition of shares 10,681,055,123 [1] 8,953,972,200 [2] 5,304,403,567
Payment on shares redeemed (9,656,124,409) [1] (7,490,397,088) [2] (4,875,819,732)
Net cash provided by (used in) financing activities 1,024,930,714 [1] 1,463,575,112 [2] 428,583,835
Net increase (decrease) in cash (8,566,752) [1] 12,150,120 [2] 12,508,499
Cash, beginning of period 48,049,351 [1],[2] 35,899,231 [2] 23,390,732
Cash, end of period 39,482,599 [1] 48,049,351 [1],[2] 35,899,231 [2]
ProShares VIX Short-Term Futures ETF [Member]      
Cash flow from operating activities      
Net income (loss) (196,292,805) (27,904,536) 21,110,424
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 (11,347,310) 12,551,205 45,580,600
Purchases of short-term U.S. government and agency obligations (920,726,003) (599,166,468) (674,817,750)
Proceeds from sales or maturities of short-term U.S government and agency obligations 869,284,481 585,220,876 800,418,587
Net amortization and accretion on short-term U.S government and agency obligations (466,392) (41,722) (46,740)
Net realized gain (loss) on investments (6,650) (1,703) (12,242)
Change in unrealized appreciation/depreciation on investments (3,010) 3,657 6,229
Decrease (Increase) in receivable on futures contracts (3,220,337) 8,053,303 (6,138,219)
Increase (Decrease) in payable to Sponsor 10,220 (3,334) (128,002)
Net cash provided by (used in) operating activities (262,767,806) (21,288,722) 185,972,887
Cash flow from financing activities      
Proceeds from addition of shares 515,131,303 187,659,682 228,373,046
Payment on shares redeemed (249,951,175) (165,941,648) (416,984,894)
Net cash provided by (used in) financing activities 265,180,128 21,718,034 (188,611,848)
Net increase (decrease) in cash 2,412,322 429,312 (2,638,961)
Cash, beginning of period 2,124,103 1,694,791 4,333,752
Cash, end of period 4,536,425 2,124,103 1,694,791
ProShares VIX Mid-Term Futures ETF [Member]      
Cash flow from operating activities      
Net income (loss) (12,324,462) (4,180,533) (9,606,005)
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 (71,865) 926,200 6,547,440
Purchases of short-term U.S. government and agency obligations (175,738,460) (95,567,067) (161,570,392)
Proceeds from sales or maturities of short-term U.S government and agency obligations 156,335,340 93,706,007 183,523,221
Net amortization and accretion on short-term U.S government and agency obligations (107,408) (8,293) (16,573)
Net realized gain (loss) on investments (499) (1,355) (1,742)
Change in unrealized appreciation/depreciation on investments 1,079 327 (187)
Decrease (Increase) in receivable on futures contracts (200,353) 1,741,140 (1,682,594)
Increase (Decrease) in payable to Sponsor 12,194 (2,358) (22,712)
Net cash provided by (used in) operating activities (32,094,434) (3,385,932) 17,170,456
Cash flow from financing activities      
Proceeds from addition of shares 55,230,587 19,318,111 41,886,902
Payment on shares redeemed (22,652,829) (16,894,470) (59,329,673)
Net cash provided by (used in) financing activities 32,577,758 2,423,641 (17,442,771)
Net increase (decrease) in cash 483,324 (962,291) (272,315)
Cash, beginning of period 671,791 1,634,082 1,906,397
Cash, end of period 1,155,115 671,791 1,634,082
ProShares Short VIX Short-Term Futures ETF [Member]      
Cash flow from operating activities      
Net income (loss) 413,920,019 91,137,957 48,189,024
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 68,204,421 (38,283,455) (51,692,300)
Purchases of short-term U.S. government and agency obligations (2,915,165,614) (2,104,319,382) (1,647,460,143)
Proceeds from sales or maturities of short-term U.S government and agency obligations 3,281,269,459 2,016,127,119 1,306,143,088
Net amortization and accretion on short-term U.S government and agency obligations (1,126,057) (180,670) (81,544)
Net realized gain (loss) on investments 11,670 (35,629) (19,363)
Change in unrealized appreciation/depreciation on investments 6,824 (8,936) 1,764
Decrease (Increase) in receivable on futures contracts (1,059,418)   603,833
Increase (Decrease) in payable to Sponsor (277,306) 100,052 289,792
Increase (Decrease) in payable on futures contracts (1,095,271) (29,599,748) 31,020,019
Net cash provided by (used in) operating activities 844,688,727 (65,062,692) (313,005,830)
Cash flow from financing activities      
Proceeds from addition of shares 2,877,792,848 1,393,067,009 1,056,547,830
Payment on shares redeemed (3,725,781,791) (1,331,975,560) (736,573,151)
Net cash provided by (used in) financing activities (847,988,943) 61,091,449 319,974,679
Net increase (decrease) in cash (3,300,216) (3,971,243) 6,968,849
Cash, beginning of period 5,150,976 9,122,219 2,153,370
Cash, end of period 1,850,760 5,150,976 9,122,219
ProShares Ultra VIX Short-Term Futures ETF [Member]      
Cash flow from operating activities      
Net income (loss) (1,596,157,063) (427,298,234) (81,171,627)
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 (9,015,025) 54,559,100 (9,805,950)
Purchases of short-term U.S. government and agency obligations (4,242,730,514) (3,411,109,730) (2,489,268,812)
Proceeds from sales or maturities of short-term U.S government and agency obligations 4,248,037,733 3,155,524,185 2,416,241,031
Net amortization and accretion on short-term U.S government and agency obligations (1,634,060) (156,187) (72,700)
Net realized gain (loss) on investments (15,949) 49,718 (9,921)
Change in unrealized appreciation/depreciation on investments 28,844 (26,647) 4,701
Decrease (Increase) in receivable on futures contracts (17,971,713) 24,535,963 (42,531,441)
Increase (Decrease) in payable to Sponsor (3,115) 124,528 113,369
Increase (Decrease) in payable on futures contracts     (3,356,803)
Net cash provided by (used in) operating activities (1,619,460,862) (603,797,304) (209,858,153)
Cash flow from financing activities      
Proceeds from addition of shares 4,573,362,937 3,172,328,095 1,645,206,121
Payment on shares redeemed (2,952,014,084) (2,563,186,119) (1,433,851,653)
Net cash provided by (used in) financing activities 1,621,348,853 609,141,976 211,354,468
Net increase (decrease) in cash 1,887,991 5,344,672 1,496,315
Cash, beginning of period 9,081,964 3,737,292 2,240,977
Cash, end of period 10,969,955 9,081,964 3,737,292
ProShares UltraShort Bloomberg Crude Oil [Member]      
Cash flow from operating activities      
Net income (loss) (91,674,345) 55,566,664 143,313,606
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 5,222,910 2,138,235 (4,659,270)
Purchases of short-term U.S. government and agency obligations (1,099,847,442) (1,238,357,695) (1,127,199,240)
Proceeds from sales or maturities of short-term U.S government and agency obligations 974,343,507 1,290,330,607 1,243,311,872
Net amortization and accretion on short-term U.S government and agency obligations (500,160) (60,884) (110,620)
Net realized gain (loss) on investments 4,064 (14,458) (20,701)
Change in unrealized appreciation/depreciation on investments 18,617,825 20,609,817 (29,342,273)
Decrease (Increase) in receivable on futures contracts   1,293,531 210,412
Increase (Decrease) in payable to Sponsor 61,748 (27,242) (73,442)
Increase (Decrease) in brokerage commissions and fees payable (8,453) 8,453  
Increase (Decrease) in payable on futures contracts (837,281) 850,883  
Net cash provided by (used in) operating activities (194,617,627) 132,337,911 225,430,344
Cash flow from financing activities      
Proceeds from addition of shares 1,002,034,810 796,070,368 474,919,955
Payment on shares redeemed (805,300,056) (928,803,902) (701,228,946)
Net cash provided by (used in) financing activities 196,734,754 (132,733,534) (226,308,991)
Net increase (decrease) in cash 2,117,127 (395,623) (878,647)
Cash, beginning of period 598,645 994,268 1,872,915
Cash, end of period 2,715,772 598,645 994,268
ProShares UltraShort Bloomberg Natural Gas [Member]      
Cash flow from operating activities      
Net income (loss) 2,456,572 8,623,248 11,235,212
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 1,336,005 2,359,170 (2,021,030)
Purchases of short-term U.S. government and agency obligations (46,397,398) (59,678,558) (208,007,837)
Proceeds from sales or maturities of short-term U.S government and agency obligations 51,635,055 60,242,291 217,631,381
Net amortization and accretion on short-term U.S government and agency obligations (19,053) (5,830) (16,306)
Net realized gain (loss) on investments (3,139) (29) (5,163)
Change in unrealized appreciation/depreciation on investments 388 (168) (72)
Decrease (Increase) in receivable on futures contracts (105,872) 923,531 597,017
Increase (Decrease) in payable to Sponsor (7,499) 620 309
Increase (Decrease) in brokerage commissions and fees payable (1,764) 1,908  
Increase (Decrease) in payable on futures contracts (785,170) 785,170  
Net cash provided by (used in) operating activities 8,108,125 13,251,353 19,413,511
Cash flow from financing activities      
Proceeds from addition of shares 40,020,426 37,204,187 119,491,987
Payment on shares redeemed (48,901,060) (50,053,143) (138,773,402)
Net cash provided by (used in) financing activities (8,880,634) (12,848,956) (19,281,415)
Net increase (decrease) in cash (772,509) 402,397 132,096
Cash, beginning of period 1,099,140 696,743 564,647
Cash, end of period 326,631 1,099,140 696,743
ProShares UltraShort Gold [Member]      
Cash flow from operating activities      
Net income (loss) (11,462,140) 16,103,864 (14,104,429)
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 78,050 (82,450) 7,150
Purchases of short-term U.S. government and agency obligations (320,273,448) (254,497,395) (320,898,147)
Proceeds from sales or maturities of short-term U.S government and agency obligations 332,879,016 265,587,947 385,891,756
Net amortization and accretion on short-term U.S government and agency obligations (164,568) (31,999) (40,646)
Net realized gain (loss) on investments 378 (1,301) (3,873)
Change in unrealized appreciation/depreciation on investments (1,226,652) (4,088,770) 7,914,963
Decrease (Increase) in receivable on futures contracts (1,280) 3,260 (2,960)
Increase (Decrease) in payable to Sponsor (4,097) (10,170) (53,758)
Increase (Decrease) in payable on futures contracts (80) 80  
Net cash provided by (used in) operating activities (174,821) 22,983,066 58,710,056
Cash flow from financing activities      
Proceeds from addition of shares 83,353,994 13,383,255 51,784,693
Payment on shares redeemed (83,209,971) (36,377,117) (110,529,962)
Net cash provided by (used in) financing activities 144,023 (22,993,862) (58,745,269)
Net increase (decrease) in cash (30,798) (10,796) (35,213)
Cash, beginning of period 151,638 162,434 197,647
Cash, end of period 120,840 151,638 162,434
ProShares UltraShort Silver [Member]      
Cash flow from operating activities      
Net income (loss) (21,184,809) 14,427,236 17,341,032
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 (2,860) 2,860 7,700
Purchases of short-term U.S. government and agency obligations (149,552,689) (220,073,123) (243,452,982)
Proceeds from sales or maturities of short-term U.S government and agency obligations 178,824,533 221,589,835 306,085,077
Net amortization and accretion on short-term U.S government and agency obligations (93,482) (23,831) (30,901)
Net realized gain (loss) on investments 1,916 2,787 (4,234)
Change in unrealized appreciation/depreciation on investments 3,393,666 (4,182,532) (2,820,396)
Decrease (Increase) in receivable on futures contracts (1,900) 6,380 (4,320)
Increase (Decrease) in payable to Sponsor (27,635) 4,831 (51,786)
Net cash provided by (used in) operating activities 11,356,740 11,754,443 77,069,190
Cash flow from financing activities      
Proceeds from addition of shares 69,113,968 84,272,164 72,497,634
Payment on shares redeemed (80,899,441) (95,719,329) (149,820,485)
Net cash provided by (used in) financing activities (11,785,473) (11,447,165) (77,322,851)
Net increase (decrease) in cash (428,733) 307,278 (253,661)
Cash, beginning of period 514,784 207,506 461,167
Cash, end of period 86,051 514,784 207,506
ProShares Short Euro [Member]      
Cash flow from operating activities      
Net income (loss) 430,553 1,238,819 1,893,293
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 101,145 (260,865) (114,180)
Purchases of short-term U.S. government and agency obligations (53,315,548) (56,503,913) (36,652,485)
Proceeds from sales or maturities of short-term U.S government and agency obligations 55,336,935 53,441,831 32,472,610
Net amortization and accretion on short-term U.S government and agency obligations (32,959) (4,504) (4,716)
Net realized gain (loss) on investments (33) (218) (402)
Change in unrealized appreciation/depreciation on investments (12) 170 472
Decrease (Increase) in receivable on futures contracts 84,235 (20,985) (54,150)
Increase (Decrease) in payable to Sponsor (1,409) 2,967 4,134
Increase (Decrease) in payable on futures contracts 76,666    
Net cash provided by (used in) operating activities 2,679,573 (2,106,698) (2,455,424)
Cash flow from financing activities      
Proceeds from addition of shares 2,109,382 23,563,492 8,924,282
Payment on shares redeemed (4,280,745) (21,313,217) (5,692,613)
Net cash provided by (used in) financing activities (2,171,363) 2,250,275 3,231,669
Net increase (decrease) in cash 508,210 143,577 776,245
Cash, beginning of period 1,783,802 1,640,225 863,980
Cash, end of period 2,292,012 1,783,802 1,640,225
ProShares UltraShort Australian Dollar [Member]      
Cash flow from operating activities      
Net income (loss) (1,329,472) 2,956,397 1,907,938
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 (857,695) 963,152 121,418
Purchases of short-term U.S. government and agency obligations (51,162,005) (61,647,966) (41,309,385)
Proceeds from sales or maturities of short-term U.S government and agency obligations 56,705,513 63,512,421 45,247,467
Net amortization and accretion on short-term U.S government and agency obligations (43,459) (5,998) (8,225)
Net realized gain (loss) on investments (495) (225) (492)
Change in unrealized appreciation/depreciation on investments (279) 553 1,463
Decrease (Increase) in receivable on futures contracts 52,491 10,043 (62,534)
Increase (Decrease) in payable to Sponsor (3,812) (1,630) (3,620)
Increase (Decrease) in payable on futures contracts 32,340   (86,166)
Net cash provided by (used in) operating activities 3,393,127 5,786,747 5,807,864
Cash flow from financing activities      
Proceeds from addition of shares   2,764,167  
Payment on shares redeemed (2,517,734) (8,380,675) (6,770,427)
Net cash provided by (used in) financing activities (2,517,734) (5,616,508) (6,770,427)
Net increase (decrease) in cash 875,393 170,239 (962,563)
Cash, beginning of period 1,958,996 1,788,757 2,751,320
Cash, end of period 2,834,389 1,958,996 1,788,757
ProShares UltraShort Euro [Member]      
Cash flow from operating activities      
Net income (loss) 16,410,009 81,176,382 110,188,662
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 (1,535,809,146) (1,901,774,819) (1,291,071,881)
Proceeds from sales or maturities of short-term U.S government and agency obligations 1,745,625,938 1,842,981,707 1,241,999,870
Net amortization and accretion on short-term U.S government and agency obligations (1,012,886) (263,820) (199,596)
Net realized gain (loss) on investments (242) (22,509) (4,637)
Change in unrealized appreciation/depreciation on investments (44,885,942) 45,497,112 (30,499,215)
Increase (Decrease) in payable to Sponsor (123,177) 28,455 40,427
Net cash provided by (used in) operating activities 180,204,554 67,622,508 30,453,630
Cash flow from financing activities      
Proceeds from addition of shares 15,418,329 341,209,778 71,794,729
Payment on shares redeemed (203,078,964) (399,206,157) (101,720,845)
Net cash provided by (used in) financing activities (187,660,635) (57,996,379) (29,926,116)
Net increase (decrease) in cash (7,456,081) 9,626,129 527,514
Cash, beginning of period 10,372,583 746,454 218,940
Cash, end of period 2,916,502 10,372,583 746,454
ProShares UltraShort Yen [Member]      
Cash flow from operating activities      
Net income (loss) 6,821,473 (7,164,812) 93,132,105
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 (1,044,852,917) (1,322,695,643) (1,219,436,703)
Proceeds from sales or maturities of short-term U.S government and agency obligations 1,048,290,293 1,595,758,281 1,245,266,414
Net amortization and accretion on short-term U.S government and agency obligations (531,771) (135,814) (197,253)
Net realized gain (loss) on investments 5,910 3,035 (13,833)
Change in unrealized appreciation/depreciation on investments (30,657,216) 12,347,563 30,986,352
Increase (Decrease) in payable to Sponsor 21,603 (228,916) 2,264
Net cash provided by (used in) operating activities (20,902,625) 277,883,694 149,739,346
Cash flow from financing activities      
Proceeds from addition of shares 150,763,218 124,524,909 216,403,570
Payment on shares redeemed (126,970,573) (402,664,341) (366,185,318)
Net cash provided by (used in) financing activities 23,792,645 (278,139,432) (149,781,748)
Net increase (decrease) in cash 2,890,020 (255,738) (42,402)
Cash, beginning of period 276,968 532,706 575,108
Cash, end of period 3,166,988 276,968 532,706
ProShares Ultra Bloomberg Crude Oil [Member]      
Cash flow from operating activities      
Net income (loss) 218,419,388 (872,084,399) (370,328,286)
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 26,962,210 (12,966,690) (30,783,225)
Purchases of short-term U.S. government and agency obligations (3,746,504,691) (4,300,690,737) (1,059,239,810)
Proceeds from sales or maturities of short-term U.S government and agency obligations 3,661,263,949 3,970,639,458 729,547,449
Net amortization and accretion on short-term U.S government and agency obligations (2,170,633) (382,657) (68,292)
Net realized gain (loss) on investments 17,374 (22,728) (11,806)
Change in unrealized appreciation/depreciation on investments (127,540,623) (3,997,651) 78,146,323
Decrease (Increase) in receivable on futures contracts 5,150,763 (5,150,763)  
Increase (Decrease) in payable to Sponsor 176,115 316,922 185,707
Increase (Decrease) in brokerage commissions and fees payable (22,668) 25,000  
Increase (Decrease) in payable on futures contracts 1,993,438 (5,817,266) 4,820,056
Net cash provided by (used in) operating activities 37,744,622 (1,230,131,511) (647,731,884)
Cash flow from financing activities      
Proceeds from addition of shares 1,099,498,953 2,529,448,592 979,031,080
Payment on shares redeemed (1,139,850,399) (1,297,658,086) (329,639,408)
Net cash provided by (used in) financing activities (40,351,446) 1,231,790,506 649,391,672
Net increase (decrease) in cash (2,606,824) 1,658,995 1,659,788
Cash, beginning of period 4,008,379 2,349,384 689,596
Cash, end of period 1,401,555 4,008,379 2,349,384
ProShares Ultra Bloomberg Natural Gas [Member]      
Cash flow from operating activities      
Net income (loss) 13,409,647 (60,331,945) (38,222,590)
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 (17,490) 13,538,800 (14,531,880)
Purchases of short-term U.S. government and agency obligations (136,277,314) (262,203,648) (269,350,242)
Proceeds from sales or maturities of short-term U.S government and agency obligations 126,972,823 288,829,035 274,880,518
Net amortization and accretion on short-term U.S government and agency obligations (72,943) (18,846) (15,961)
Net realized gain (loss) on investments 698 (4,341) (5,068)
Change in unrealized appreciation/depreciation on investments 819 296 1,537
Decrease (Increase) in receivable on futures contracts 3,065,769 (3,065,769)  
Increase (Decrease) in payable to Sponsor 10,926 (40,680) (15,937)
Increase (Decrease) in brokerage commissions and fees payable (3,190) 3,623  
Increase (Decrease) in payable on futures contracts 1,528,005 (9,552,314) 3,923,782
Net cash provided by (used in) operating activities 8,617,750 (32,845,789) (43,335,841)
Cash flow from financing activities      
Proceeds from addition of shares 40,783,818 87,380,298 168,002,793
Payment on shares redeemed (49,841,263) (54,776,954) (126,116,197)
Net cash provided by (used in) financing activities (9,057,445) 32,603,344 41,886,596
Net increase (decrease) in cash (439,695) (242,445) (1,449,245)
Cash, beginning of period 1,411,137 1,653,582 3,102,827
Cash, end of period 971,442 1,411,137 1,653,582
ProShares Ultra Gold [Member]      
Cash flow from operating activities      
Net income (loss) 2,966,147 (23,712,075) (1,941,677)
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 (4,950) 550 7,150
Purchases of short-term U.S. government and agency obligations (406,481,915) (260,988,119) (407,203,130)
Proceeds from sales or maturities of short-term U.S government and agency obligations 383,282,007 291,047,782 446,217,714
Net amortization and accretion on short-term U.S government and agency obligations (249,321) (42,700) (54,755)
Net realized gain (loss) on investments 806 393 (1,361)
Change in unrealized appreciation/depreciation on investments 2,184,901 4,299,663 (8,869,503)
Decrease (Increase) in receivable on futures contracts 80 (80)  
Increase (Decrease) in payable to Sponsor 15,554 (28,602) (25,929)
Increase (Decrease) in payable on futures contracts 1,280 (3,260) 2,960
Net cash provided by (used in) operating activities (18,285,411) 10,573,552 28,131,469
Cash flow from financing activities      
Proceeds from addition of shares 41,599,776 5,401,300 13,559,078
Payment on shares redeemed (22,303,538) (15,827,473) (41,728,968)
Net cash provided by (used in) financing activities 19,296,238 (10,426,173) (28,169,890)
Net increase (decrease) in cash 1,010,827 147,379 (38,421)
Cash, beginning of period 251,524 104,145 142,566
Cash, end of period 1,262,351 251,524 104,145
ProShares Ultra Silver [Member]      
Cash flow from operating activities      
Net income (loss) 61,734,685 (91,000,185) (169,412,765)
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 2,860 (2,860) 7,700
Purchases of short-term U.S. government and agency obligations (1,412,194,485) (835,846,036) (1,432,093,309)
Proceeds from sales or maturities of short-term U.S government and agency obligations 1,356,640,583 902,567,408 1,594,662,608
Net amortization and accretion on short-term U.S government and agency obligations (842,217) (156,353) (177,671)
Net realized gain (loss) on investments (145) 441 (8,226)
Change in unrealized appreciation/depreciation on investments (1,589,821) 10,175,106 9,913,603
Increase (Decrease) in payable to Sponsor 40,213 (72,982) (125,078)
Increase (Decrease) in payable on futures contracts 415 (4,895) 4,320
Net cash provided by (used in) operating activities 3,792,088 (14,340,356) 2,771,182
Cash flow from financing activities      
Proceeds from addition of shares 104,165,405 96,078,803 144,929,400
Payment on shares redeemed (106,536,792) (81,799,551) (147,858,579)
Net cash provided by (used in) financing activities (2,371,387) 14,279,252 (2,929,179)
Net increase (decrease) in cash 1,420,701 (61,104) (157,997)
Cash, beginning of period 243,900 305,004 463,001
Cash, end of period 1,664,601 243,900 305,004
ProShares Ultra Euro [Member]      
Cash flow from operating activities      
Net income (loss) (1,113,834) (1,378,466) (647,290)
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 (48,066,675) (42,137,395) (7,297,855)
Proceeds from sales or maturities of short-term U.S government and agency obligations 47,805,780 32,950,150 7,338,926
Net amortization and accretion on short-term U.S government and agency obligations (25,015) (2,797) (1,083)
Net realized gain (loss) on investments (154) 109 (5)
Change in unrealized appreciation/depreciation on investments 1,178,425 (707,922) 204,515
Increase (Decrease) in payable to Sponsor (415) 8,041 (718)
Net cash provided by (used in) operating activities (221,888) (11,268,280) (403,510)
Cash flow from financing activities      
Proceeds from addition of shares 4,628,749 15,916,613 1,024,904
Payment on shares redeemed (4,027,778) (5,092,140)  
Net cash provided by (used in) financing activities 600,971 10,824,473 1,024,904
Net increase (decrease) in cash 379,083 (443,807) 621,394
Cash, beginning of period 227,310 671,117 49,723
Cash, end of period 606,393 227,310 671,117
ProShares Ultra Yen [Member]      
Cash flow from operating activities      
Net income (loss) 67,308 (240,514) (417,391)
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 (28,924,289) (12,557,564) (5,540,122)
Proceeds from sales or maturities of short-term U.S government and agency obligations 28,727,215 8,779,817 7,181,715
Net amortization and accretion on short-term U.S government and agency obligations (16,858) (3,609) (1,101)
Net realized gain (loss) on investments 34 (6) (94)
Change in unrealized appreciation/depreciation on investments 603,897 (276,816) (143,775)
Increase (Decrease) in payable to Sponsor 212 2,810 (822)
Net cash provided by (used in) operating activities 457,519 (4,295,882) 1,078,410
Cash flow from financing activities      
Proceeds from addition of shares   4,285,016 716,043
Payment on shares redeemed (199) (688,682) (975,650)
Net cash provided by (used in) financing activities (199) 3,596,334 (259,607)
Net increase (decrease) in cash 457,320 (699,548) 818,803
Cash, beginning of period 147,371 846,919 28,116
Cash, end of period $ 604,691 $ 147,371 $ 846,919
[1] The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.
[2] The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.