Related Party Transactions - Related Party Transactions Included in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2022
Cash and cash equivalents
Cash and cash equivalents	$ 8,717	$ 7,670
TMCC-affiliated companies [Member]
Finance receivables, net
Accounts receivable	39	90
Deferred retail subvention income	(819)	(875)
Investments in operating leases, net
Investments in operating leases, net	(243)	(212)
Deferred lease subvention income	(760)	(923)
Other assets
Notes receivable	653	789
Other receivables, net	80	80
Other liabilities
Unearned voluntary protection contract revenues and insurance earned premiums	376	374
Other payables, net	364	394
Notes payable	16	8
Commercial paper [Member] \| TMCC-affiliated companies [Member]
Cash and cash equivalents
Cash and cash equivalents	$ 19	$ 100

Amount of deferred operating lease subvention revenue from related parties.

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Amount of deferred retail subvention revenue from related parties.

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The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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