Maximum Lag Period of Recognizing the Results of Subsidiaries and Affiliates

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Percentage Of Tax Benefit Realized Upon Ultimate Settlement With Taxing Authority

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Significant Accounting Policies [Line Items]

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of increase (decrease) in operating liabilities classified as other.

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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- Definition

Cost of real estate projects incurred for projects for eventual sale or transfer (condominium or time share projects, vacation clubs).

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- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Significant Accounting and Reporting Policies - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Significant Accounting Policies [Line Items]
A maximum lag period of recognizing the results of subsidiaries and affiliates	3 months
Residential condominiums under development	¥ 62,414	¥ 57,502
Finished goods	77,149	84,654
Write-down on residential condominiums under development	10,492	2,510	¥ 863
Increase (decrease) in retained earnings	2,909,317	2,744,588
Accounting Standards Update 2019-12
Significant Accounting Policies [Line Items]
Increase in other liabilities	215
Accounting Standards Update 2019-12 \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Significant Accounting Policies [Line Items]
Increase (decrease) in retained earnings	¥ 215
Investment in operating leases \| Transportation equipment
Significant Accounting Policies [Line Items]
Estimated average useful lives	7 years
Investment in operating leases \| Measuring and information-related equipment
Significant Accounting Policies [Line Items]
Estimated average useful lives	4 years
Investment in operating leases \| Real Estate Asset
Significant Accounting Policies [Line Items]
Estimated average useful lives	31 years
Investment in operating leases \| Other
Significant Accounting Policies [Line Items]
Estimated average useful lives	10 years
Property under Facility Operations
Significant Accounting Policies [Line Items]
Depreciation expenses	¥ 29,871	30,448	27,147
Accumulated depreciation	147,459	132,184
Office Facilities
Significant Accounting Policies [Line Items]
Depreciation expenses	9,083	8,269	¥ 7,714
Accumulated depreciation	¥ 73,063	¥ 68,524
Minimum
Significant Accounting Policies [Line Items]
Income tax settlement by tax authority	50.00%
Maximum \| Property under Facility Operations \| Buildings
Significant Accounting Policies [Line Items]
Estimated average useful lives	50 years
Maximum \| Property under Facility Operations \| Structures
Significant Accounting Policies [Line Items]
Estimated average useful lives	60 years
Maximum \| Property under Facility Operations \| Property, Plant and Equipment, Other Types
Significant Accounting Policies [Line Items]
Estimated average useful lives	50 years
Maximum \| Office Facilities \| Buildings And Structures
Significant Accounting Policies [Line Items]
Estimated average useful lives	62 years
Maximum \| Office Facilities \| Machinery and equipment
Significant Accounting Policies [Line Items]
Estimated average useful lives	25 years