Document and Entity Information - shares	3 Months Ended
	Dec. 31, 2022	Feb. 04, 2023
Document and Entity Information [Abstract]
Entity Registrant Name	U-Haul Holding Company
Entity Central Index Key	0000004457
Entity Current Reporting Status	Yes
Entity Small Business	false
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Document Fiscal Year Focus	2023
Document Type	10-Q
Document Fiscal Period Focus	Q3
Document Period End Date	Dec. 31, 2022
Amendment Flag	false
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity File Number	001-11255
Entity Tax Identification Number	88-0106815
Entity Address Address Line 1	5555 Kietzke Lane
Entity Address Address Line 2	Suite 100
Entity Address City Or Town	Reno
Entity Address State Or Province	NV
Entity Address Postal Zip Code	89511
City Area Code	775
Local Phone Number	688-6300
Entity Incorporation State Country Code	NV
Document Quarterly Report	true
Document Transition Report	false
Common Stock [Member]
Document and Entity Information [Abstract]
Trading Symbol	UHAL
Entity Common Stock, Shares Outstanding		19,607,788
Security 12 b Title	Common Stock, $0.25 par value
Security Exchange Name	NYSE
Nonvoting Common Stock [Member]
Document and Entity Information [Abstract]
Trading Symbol	UHAL.B
Entity Common Stock, Shares Outstanding		176,470,092
Security 12 b Title	Series N Non-Voting Common Stock, $0.001 par value
Security Exchange Name	NYSE