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v3.21.1

Borrowings (Long-term debt borrowings) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020
Debt instrument, maturities: |  |
Notes, loans and finance/capital leases payable | $ 4,698,615 | $ 4,651,068
Less: Debt issuance costs | (29,708) | (29,777)
Total notes, loans and finance/capital leases payable, net | $ 4,668,907 | 4,621,291
Real estate loan (amortizing term) [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.61% |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, end | 2023 |
Notes, loans and finance/capital leases payable | $ 82,913 | 92,913
Real estate loan (amortizing term) [Member] | Minimum [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year | 2021 |
Real estate loan (amortizing term) [Member] | Maximum [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year | 2036 |
Senior mortgages [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2021 |
Debt instrument, maturity year range, end | 2038 |
Notes, loans and finance/capital leases payable | $ 2,125,324 | 2,029,878
Senior mortgages [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 2.80% |
Senior mortgages [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 6.62% |
Real estate loans (revolving credit) [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2023 |
Debt instrument, maturity year range, end | 2025 |
Notes, loans and finance/capital leases payable | $ 535,000 | 519,000
Real estate loans (revolving credit) [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.36% |
Real estate loans (revolving credit) [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.61% |
Fleet loans (amortizing) [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2022 |
Debt instrument, maturity year range, end | 2028 |
Notes, loans and finance/capital leases payable | $ 176,295 | 224,089
Fleet loans (amortizing) [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.61% |
Fleet loans (amortizing) [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 4.66% |
Fleet loans (securitization) [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2023 |
Debt instrument, maturity year range, end | 2025 |
Notes, loans and finance/capital leases payable | $ 535,000 | 567,000
Fleet loans (securitization) [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.27% |
Fleet loans (securitization) [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 2.36% |
Fleet Loans (revolving credit) [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2021 |
Debt instrument, maturity year range, end | 2027 |
Notes, loans and finance/capital leases payable | $ 513,623 | 734,870
Fleet Loans (revolving credit) [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.92% |
Fleet Loans (revolving credit) [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 5.04% |
Capital leases (rental equipment) [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2024 |
Debt instrument, maturity year range, end | 2029 |
Notes, loans and finance/capital leases payable | $ 644,375 | 398,834
Capital leases (rental equipment) [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 1.60% |
Capital leases (rental equipment) [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 4.22% |
Other Obligations [Member] |  |
Debt instrument, maturities: |  |
Debt instrument, maturity year range, start | 2021 |
Debt instrument, maturity year range, end | 2049 |
Notes, loans and finance/capital leases payable | $ 86,085 | $ 84,484
Other Obligations [Member] | Minimum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 2.25% |
Other Obligations [Member] | Maximum [Member] |  |
Debt instruments, interest rate, stated percentage: |  |
Debt instrument, interest rate, stated percentage | 8.00% |

X
- Definition The latest maturity year for these debt instruments. + References No definition available. + Details
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Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The earliest maturity year for these debt instruments. + References No definition available. + Details
Name: | uhal_MaturityStartYear
Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition The DebtInstrumentMaturityDate could have worked for this element, but it must include the format Month-Date-Year. Will use this US-GAAP Element in the next few schedules, when possible, where we break down the various items that make up the Borrowing's narrative. + References No definition available. + Details
Name: | uhal_MaturityYear
Namespace Prefix: | uhal_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of short-term and long-term debt and lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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