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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2025
Feb. 23, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Document Transition Report false    
Document Fiscal Year Focus 2025    
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 7272 Wisconsin Ave    
Entity Address, Address Line Three 21st Floor    
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    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   218,860,242  
Entity Public Float   $ 0  
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 248    
Auditor Location Columbus, Ohio    
Document Financial Statement Error Correction [Flag] false    
Documents Incorporated by Reference [Text Block]
DOCUMENTS INCORPORATED BY REFERENCE:
None.
   
ProShares Short VIX Short-Term Futures ETF [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   3,868,614  
Title of 12(b) Security ProShares Short VIX Short-Term Futures ETF    
Security Exchange Name CboeBZX    
Trading Symbol SVXY    
Entity Public Float     $ 279,925,400
Proshares Ultra Bloomberg Crude Oil [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   17,193,096  
Title of 12(b) Security ProShares Ultra Bloomberg Crude Oil    
Security Exchange Name NYSEArca    
Trading Symbol UCO    
Entity Public Float     420,493,513
Proshares Ultra Bloomberg Natural Gas [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   19,523,047  
Title of 12(b) Security ProShares Ultra Bloomberg Natural Gas    
Security Exchange Name NYSEArca    
Trading Symbol BOIL    
Entity Public Float     334,757,794
Proshares Ultra Euro [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   500,000  
Title of 12(b) Security ProShares Ultra Euro    
Security Exchange Name NYSEArca    
Trading Symbol ULE    
Entity Public Float     8,708,069
Proshares Ultra Gold [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   18,350,000  
Title of 12(b) Security ProShares Ultra Gold    
Security Exchange Name NYSEArca    
Trading Symbol UGL    
Entity Public Float     485,005,243
Proshares Ultra Silver [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   16,296,526  
Title of 12(b) Security ProShares Ultra Silver    
Security Exchange Name NYSEArca    
Trading Symbol AGQ    
Entity Public Float     708,196,011
ProShares Ultra VIX Short-Term Futures ETF [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   9,217,347  
Title of 12(b) Security ProShares Ultra VIX Short-Term Futures ETF    
Security Exchange Name CboeBZX    
Trading Symbol UVXY    
Entity Public Float     579,408,908
Proshares Ultra Yen [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,499,970  
Title of 12(b) Security ProShares Ultra Yen    
Security Exchange Name NYSEArca    
Trading Symbol YCL    
Entity Public Float     66,461,439
ProShares UltraShort Bloomberg Crude Oil [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   8,805,220  
Title of 12(b) Security ProShares UltraShort Bloomberg Crude Oil    
Security Exchange Name NYSEArca    
Trading Symbol SCO    
Entity Public Float     135,277,470
ProShares UltraShort Bloomberg Natural Gas [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   16,883,712  
Title of 12(b) Security ProShares UltraShort Bloomberg Natural Gas    
Security Exchange Name NYSEArca    
Trading Symbol KOLD    
Entity Public Float     283,266,637
ProShares UltraShort Euro [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   1,150,000  
Title of 12(b) Security ProShares UltraShort Euro    
Security Exchange Name NYSEArca    
Trading Symbol EUO    
Entity Public Float     31,567,012
ProShares UltraShort Gold [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   5,236,631  
Title of 12(b) Security ProShares UltraShort Gold    
Security Exchange Name NYSEArca    
Trading Symbol GLL    
Entity Public Float     76,838,176
ProShares UltraShort Silver [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   85,910,264  
Title of 12(b) Security ProShares UltraShort Silver    
Security Exchange Name NYSEArca    
Trading Symbol ZSL    
Entity Public Float     35,410,975
ProShares UltraShort Yen [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   497,160  
Title of 12(b) Security ProShares UltraShort Yen    
Security Exchange Name NYSEArca    
Trading Symbol YCS    
Entity Public Float     20,559,703
ProShares VIX Mid-Term Futures ETF [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   4,237,403  
Title of 12(b) Security ProShares VIX Mid-Term Futures ETF    
Security Exchange Name CboeBZX    
Trading Symbol VIXM    
Entity Public Float     21,537,610
ProShares VIX Short-Term Futures ETF [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   8,691,252  
Title of 12(b) Security ProShares VIX Short-Term Futures ETF    
Security Exchange Name CboeBZX    
Trading Symbol VIXY    
Entity Public Float     $ 164,541,842