Document and Entity Information	6 Months Ended
	Jun. 30, 2019 shares
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	UUP
Entity Registrant Name	Invesco DB US Dollar Index Bullish Fund
Entity Central Index Key	0001383151
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	001-33314
Entity Tax Identification Number	870778082
Entity Address, Address Line One	c/o Invesco Capital Management LLC
Entity Address, Address Line Two	3500 Lacey Road
Entity Address, Address Line Three	Suite 700
Entity Address, City or Town	Downers Grove
Entity Address, State or Province	Illinois
Entity Address, Postal Zip Code	60515
City Area Code	800
Local Phone Number	983-0903
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	12,400,000