| Document and Entity Information | Aug. 31, 2023 |
| Document and Entity Information [Abstract] | |
| Entity Registrant Name | U-Haul Holding Company |
| Entity Central Index Key | 0000004457 |
| Entity Emerging Growth Company | false |
| Document Type | 8-K |
| Document Period End Date | Aug. 31, 2023 |
| Amendment Flag | false |
| Entity File Number | 001-11255 |
| Entity Tax Identification Number | 88-0106815 |
| Entity Address Address Line 1 | 5555 Kietzke Lane |
| Entity Address Address Line 2 | Ste. 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 | 668-6300 |
| Entity Incorporation State Country Code | NV |
| Written Commuications | false |
| Soliciting Material | false |
| Pre Commencement Tender offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Common Stock [Member] | |
| Document and Entity Information [Abstract] | |
| Trading Symbol | UHAL |
| 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 |
| Security 12 b Title | Common Stock, $0.001 par value |
| Security Exchange Name | NYSE |
