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Write-Downs of Long-Lived Assets - Breakdowns of Recognized Impairment Losses for Difference between Carrying Amounts and Fair Values Reflected as Write-Downs of Long-Lived Assets (Detail) ¥ in Millions | 12 Months Ended
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Mar. 31, 2024 JPY (¥) Property | Mar. 31, 2023 JPY (¥) Property | Mar. 31, 2022 JPY (¥) Property
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Write-downs of the assets held for sale, amount |  | ¥ 134 | ¥ 243 | ¥ 12,749
Write-downs of the assets held for sale, number of properties | Property |  |  |  |
Write-downs due to decline in estimated future cash flows, amount |  | ¥ 1,590 | ¥ 2,054 | ¥ 22,917
Write-downs due to decline in estimated future cash flows, number of properties | Property |  |  |  |
Office Buildings |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Write-downs of the assets held for sale, amount |  | ¥ 0 | ¥ 0 |
Write-downs due to decline in estimated future cash flows, amount |  | ¥ 641 | ¥ 1,535 |
Write-downs due to decline in estimated future cash flows, number of properties | Property |  | 2 | 2 |
Commercial facilities other than office buildings |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Write-downs of the assets held for sale, amount |  | ¥ 0 | ¥ 0 | ¥ 858
Write-downs of the assets held for sale, number of properties | Property |  |  |  | 3
Write-downs due to decline in estimated future cash flows, amount |  | ¥ 547 | ¥ 51 | ¥ 11
Write-downs due to decline in estimated future cash flows, number of properties | Property |  | 4 | 2 | 1
Condominiums |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Write-downs of the assets held for sale, amount |  | ¥ 0 | ¥ 2 | ¥ 13
Write-downs of the assets held for sale, number of properties | Property |  | 1 | 1 | 2
Write-downs due to decline in estimated future cash flows, amount |  | ¥ 30 | ¥ 15 | ¥ 83
Write-downs due to decline in estimated future cash flows, number of properties | Property |  | 22 | 19 | 49
Others |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Write-downs of the assets held for sale, amount | [1] | ¥ 134 | ¥ 241 | ¥ 11,878
Write-downs due to decline in estimated future cash flows, amount | [1] | ¥ 372 | ¥ 453 | ¥ 22,823
[1] | For the “Others”, the numbers of properties are omitted. Write-downs of long-lived assets for fiscal 2022 include write-downs of ¥31,205 million of property under facility operations and others held by subsidiaries, of which ¥19,564 million related to write-downs of two coal-biomass co-fired power plants, and ¥2,331 million of two aircraft.

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- Definition Impairment of long lived assets to be disposed of due to decline in estimated future cash flows. + References No definition available. + Details
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- Definition Number Of Impaired Assets Impairment Due To Assets Held For Sale. + References No definition available. + Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482130/360-10-45-15 + Details
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