The amount of additions to right-of-use assets.

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Contract Term

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The increase (decrease) during the reporting period in the amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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No definition available.

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The increase (decrease) during the reporting period in the portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The amount of current lease liabilities.

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No definition available.

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The amount of non-current lease liabilities.

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Significant Accounting Policies [Line Items]

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- Definition

Amount of increase (decrease) in accumulated depreciation, depletion and amortization of property, plant and equipment.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Summary of significant accounting policies - Additional Information (Detail) - JPY (¥)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Significant Accounting Policies [Line Items]
Advertising costs	¥ 470,849,000,000	¥ 490,093,000,000	¥ 509,653,000,000
Research and development costs	1,110,369,000,000	1,048,882,000,000	¥ 1,064,269,000,000
Inventories, LIFO basis	291,639,000,000	470,208,000,000
Inventory increase had LIFO been replaced by FIFO basis	¥ 21,194,000,000	¥ 25,302,000,000
Intangible assets with a definite life, estimated useful lives	5 years
Change in Accounting Method Accounted for as Change in Estimate [Member]
Significant Accounting Policies [Line Items]
Decrease in depreciation expense due to change in method	¥ 173,201,000,000
Increase in net income	117,001,000,000
Basic net income attributable to toyota motor corporation per common share	41.80
Investments And Other Assets [Member]
Significant Accounting Policies [Line Items]
Additions to right-of-use assets	277,118,000,000
Other Current Liabilities [Member]
Significant Accounting Policies [Line Items]
Current lease liabilities	37,385,000,000
Other Long Term Liabilities [Member]
Significant Accounting Policies [Line Items]
Non-current lease liabilities	¥ 239,623,000,000
Building \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	2 years
Building \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	65 years
Machinery and equipment \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	2 years
Machinery and equipment \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Assets Leased to Others \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	2 years
Assets Leased to Others \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	5 years
Retail Receivables Portfolio Segment \| Minimum
Significant Accounting Policies [Line Items]
Contract period	2 years
Retail Receivables Portfolio Segment \| Maximum
Significant Accounting Policies [Line Items]
Contract period	7 years
Finance Lease Receivables Portfolio Segment \| Minimum
Significant Accounting Policies [Line Items]
Contract period	2 years
Finance Lease Receivables Portfolio Segment \| Maximum
Significant Accounting Policies [Line Items]
Contract period	5 years