Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 26, 2021
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
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	7501 Wisconsin Avenue
Entity Address, Address Line Three	Suite 1000
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 Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		344,851,695
Proshares Short Euro [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Short Euro
Security Exchange Name	NYSEArca
Trading Symbol	EUFX
ProShares Short VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Short VIX Short-Term Futures ETF
Security Exchange Name	CboeBZX
Trading Symbol	SVXY
Proshares Ultra Bloomberg Crude Oil [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra Bloomberg Crude Oil
Security Exchange Name	NYSEArca
Trading Symbol	UCO
Proshares Ultra Bloomberg Natural Gas [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra Bloomberg Natural Gas
Security Exchange Name	NYSEArca
Trading Symbol	BOIL
Proshares Ultra Euro [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra Euro
Security Exchange Name	NYSEArca
Trading Symbol	ULE
Proshares Ultra Gold [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra Gold
Security Exchange Name	NYSEArca
Trading Symbol	UGL
Proshares Ultra Silver [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra Silver
Security Exchange Name	NYSEArca
Trading Symbol	AGQ
ProShares Ultra VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra VIX Short-Term Futures ETF
Security Exchange Name	CboeBZX
Trading Symbol	UVXY
Proshares Ultra Yen [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares Ultra Yen
Security Exchange Name	NYSEArca
Trading Symbol	YCL
ProShares UltraShort Australian Dollar [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Australian Dollar
Security Exchange Name	NYSEArca
Trading Symbol	CROC
ProShares UltraShort Bloomberg Crude Oil [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Bloomberg Crude Oil
Security Exchange Name	NYSEArca
Trading Symbol	SCO
ProShares UltraShort Bloomberg Natural Gas [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Bloomberg Natural Gas
Security Exchange Name	NYSEArca
Trading Symbol	KOLD
ProShares UltraShort Euro [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Euro
Security Exchange Name	NYSEArca
Trading Symbol	EUO
ProShares UltraShort Gold [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Gold
Security Exchange Name	NYSEArca
Trading Symbol	GLL
ProShares UltraShort Silver [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Silver
Security Exchange Name	NYSEArca
Trading Symbol	ZSL
ProShares UltraShort Yen [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares UltraShort Yen
Security Exchange Name	NYSEArca
Trading Symbol	YCS
ProShares VIX Mid-Term Futures ETF [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares VIX Mid-Term Futures ETF
Security Exchange Name	CboeBZX
Trading Symbol	VIXM
ProShares VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Title of 12(b) Security	ProShares VIX Short-Term Futures ETF
Security Exchange Name	CboeBZX
Trading Symbol	VIXY