Interim Financial Data (Policies)	6 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The information furnished in these unaudited interim consolidated financial statements as of and for the three and six months ended September 30, 2021 and 2020 has been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”). In the opinion of management, the unaudited consolidated financial information reflects all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the results for the interim periods presented. The results of operations for the three and six months ended September 30, 2021 do not necessarily indicate the results which may be expected for the full fiscal year ending March 31, 2022 (“fiscal 2022”). These financial statements should be read in conjunction with the Consolidated Financial Statements and Notes to Consolidated Financial Statements included in Toyota Motor Credit Corporation’s Annual Report on Form 10-K (“Form 10-K”) for the fiscal year ended March 31, 2021 (“fiscal 2021”), which was filed with the Securities and Exchange Commission on June 3, 2021. References herein to “TMCC” denote Toyota Motor Credit Corporation, and references herein to “we”, “our”, and “us” denote Toyota Motor Credit Corporation and its consolidated subsidiaries. Other Matters In fiscal 2021, TMCC began providing private label financial services to third-party automotive and mobility companies commencing with the provision of services to Mazda Motor of America, Inc. (“Mazda”). We are currently leveraging our existing processes and personnel to originate and service the new assets; however, we will continue to evaluate the private label financial services business, which includes partnering with or transitioning a portion of the business to our affiliates, some of which are not consolidated with TMCC. We have also made certain technology investments to support the Mazda program and future private label customers.
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance On April 1, 2021, we adopted the following new accounting standards: We adopted Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, along with the subsequently issued guidance, which provides temporary optional expedients and exceptions for applying generally accepted accounting principles to transactions affected by reference rate reform if certain criteria are met. The provisions of this update are available to us until December 31, 2022. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures. We adopted ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs, which requires an entity to reevaluate the amortization period for callable debt securities held at a premium each reporting period. The premium is amortized to the earliest call date of the debt security. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures.
Accounting Guidance Issued But Not Yet Adopted	Accounting Guidance Issued But Not Yet Adopted In July 2021, the FASB issued ASU 2021-05, Lessors-Certain Leases with Variable Lease Payments (Topic 842), which modifies the lease classification for certain leases. Lessors should classify and account for a lease with variable lease payments that do not depend on a reference index or rate as an operating lease if certain criteria are met. This ASU is effective for us on April 1, 2022, with early application permitted. The adoption of this guidance will not have a material impact on our consolidated financial statements and related disclosures.
Investments in Marketable Securities	Investments in marketable securities consist of debt securities and equity investments. We classify all of our debt securities as available-for-sale (“AFS”). Except when fair value option is elected, AFS debt securities are recorded at fair value with unrealized gains or losses included in accumulated other comprehensive income (“AOCI”), net of applicable taxes. All equity investments are recorded at fair value with changes in fair value included in Investment and other income, net in our Consolidated Statements of Income. In fiscal 2022, we have elected the fair value option for certain debt securities held within one of our affiliate investment portfolios for operational ease given the size and composition of this portfolio. All debt securities within this specific portfolio are recorded at fair value with changes in fair value included in Investment and other income, net in our Consolidated Statements of Income. We estimate the fair value of these securities using observed transaction prices, independent third-party pricing valuation vendors, and internal valuation models. AFS debt securities for which fair value option is elected are not subject to credit loss impairment.
Finance Receivables, Net	Finance receivables, net consists of the retail loan and dealer products portfolio segments, and includes deferred origination costs, deferred income, and allowance for credit losses. Finance receivables, net also includes securitized retail receivables, which represent retail receivables that have been sold for legal purposes to securitization trusts but continue to be included in our consolidated financial statements, as discussed further in Note 8 – Variable Interest Entities. Cash flows from these securitized retail receivables are available only for the repayment of debt issued by these trusts and other obligations arising from the securitization transactions. They are not available for payment of our other obligations or to satisfy claims of our other creditors.
Investments in Operating Leases, Net	Investments in operating leases, net consists of vehicle lease contracts acquired from dealers, and includes deferred origination fees and costs, deferred income, and accumulated depreciation. Securitized investments in operating leases represent beneficial interests in a pool of certain vehicle leases that have been sold for legal purposes to securitization trusts but continue to be included in our consolidated financial statements as discussed further in Note 8 - Variable Interest Entities. Cash flows from these securitized investments in operating leases are available only for the repayment of debt issued by these trusts and other obligations arising from the securitization transactions. They are not available for payment of our other obligations or to satisfy claims of our other creditors.
Derivative Instruments	Derivative Instruments Our liabilities consist mainly of fixed and variable rate debt, denominated in U.S. dollars and various other currencies, which we issue in the global capital markets, while our assets consist primarily of U.S. dollar denominated, fixed rate receivables. We enter into interest rate swaps, and foreign currency swaps to economically hedge the interest rate and foreign currency risks that result from the different characteristics of our assets and liabilities. Our use of derivative transactions is intended to reduce long-term fluctuations in the fair value of assets and liabilities caused by market movements. All of our derivative activities are authorized and monitored by our management and our Asset-Liability Committee which provides a framework for financial controls and governance to manage market risk.
Offsetting of Derivatives	Offsetting of Derivatives Accounting guidance permits the net presentation on our Consolidated Balance Sheets of derivative receivables and derivative payables with the same counterparty and the related cash collateral when a legally enforceable master netting agreement exists, or when the derivative receivables and derivative payables meet all the conditions for the right of setoff to exist. When we meet this condition, we elect to present such balances on a net basis. Over-the-Counter (“OTC”) Derivatives Our International Swaps and Derivatives Association (“ISDA”) Master Agreements are our master netting agreements which permit multiple transactions to be cancelled and settled with a single net balance paid to either party for our OTC derivatives. The master netting agreements also contain reciprocal collateral agreements which require the transfer of cash collateral to the party in a net asset position across all transactions. Our collateral agreements with substantially all our counterparties include a zero threshold, full collateralization arrangement. Although we have daily valuation and collateral exchange arrangements with all of our counterparties, due to the time required to move collateral, there may be a delay of up to one day between the exchange of collateral and the valuation of our derivatives. We would not be required to post additional collateral to the counterparties with whom we were in a net liability position at September 30, 2021, if our credit ratings were to decline, since we fully collateralize without regard to credit ratings with these counterparties. In addition, as our collateral agreements include legal right of offset provisions, collateral amounts are netted against derivative assets or derivative liabilities, and the net amount is included in Other assets or Other liabilities on our Consolidated Balance Sheets.
Centrally Cleared Derivatives	Centrally Cleared Derivatives For our centrally cleared derivatives, variation margin payments are legally characterized as settlement payments and accounted for with corresponding derivative positions as one unit of account as opposed to collateral. Initial margin payments are separately recorded in Other assets on our Consolidated Balance Sheets. We perform valuation and margin exchange on a daily basis. Similar to the OTC swaps, there may be a delay of up to one day between the exchange of margin payments and the valuation of our derivatives.
Consolidated Variable Interest Entities	Consolidated Variable Interest Entities We use one or more special purpose entities that are considered Variable Interest Entities (“VIEs”) to issue asset-backed securities to third-party bank-sponsored asset-backed securitization vehicles and to investors in securitization transactions. The securities issued by these VIEs are backed by the cash flows related to retail finance receivables and beneficial interests in investments in operating leases (“Securitized Assets”). We hold variable interests in the VIEs that could potentially be significant to the VIEs. We determined that we are the primary beneficiary of the securitization trusts because (i) our servicing responsibilities for the Securitized Assets give us the power to direct the activities that most significantly impact the performance of the VIEs, and (ii) our variable interests in the VIEs give us the obligation to absorb losses and the right to receive residual returns that could potentially be significant.
Revenue Recognition	Voluntary protection operations – Contract revenues The Voluntary protection operations segment defers contractually determined incentives paid to dealers as contract costs for selling voluntary protection products. These costs are recorded in Other assets on our Consolidated Balance Sheets and are amortized to Operating and administrative expenses in the Consolidated Statements of Income using a methodology consistent with the recognition of revenue. The amount of capitalized dealer incentives and the related amortization was not significant to our consolidated financial statements as of and for the three and six months ended September 30, 2021 and 2020.

Interim Financial Data (Policies)

6 Months Ended

Sep. 30, 2021

The information furnished in these unaudited interim consolidated financial statements as of and for the three and six months ended September 30, 2021 and 2020 has been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”). In the opinion of management, the unaudited consolidated financial information reflects all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the results for the interim periods presented. The results of operations for the three and six months ended September 30, 2021 do not necessarily indicate the results which may be expected for the full fiscal year ending March 31, 2022 (“fiscal 2022”).

These financial statements should be read in conjunction with the Consolidated Financial Statements and Notes to Consolidated Financial Statements included in Toyota Motor Credit Corporation’s Annual Report on Form 10-K (“Form 10-K”) for the fiscal year ended March 31, 2021 (“fiscal 2021”), which was filed with the Securities and Exchange Commission on June 3, 2021. References herein to “TMCC” denote Toyota Motor Credit Corporation, and references herein to “we”, “our”, and “us” denote Toyota Motor Credit Corporation and its consolidated subsidiaries.

Other Matters

In fiscal 2021, TMCC began providing private label financial services to third-party automotive and mobility companies commencing with the provision of services to Mazda Motor of America, Inc. (“Mazda”). We are currently leveraging our existing processes and personnel to originate and service the new assets; however, we will continue to evaluate the private label financial services business, which includes partnering with or transitioning a portion of the business to our affiliates, some of which are not consolidated with TMCC. We have also made certain technology investments to support the Mazda program and future private label customers.

Recently Adopted Accounting Guidance

On April 1, 2021, we adopted the following new accounting standards:

We adopted Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, along with the subsequently issued guidance, which provides temporary optional expedients and exceptions for applying generally accepted accounting principles to transactions affected by reference rate reform if certain criteria are met. The provisions of this update are available to us until December 31, 2022. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures.

We adopted ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs, which requires an entity to reevaluate the amortization period for callable debt securities held at a premium each reporting period. The premium is amortized to the earliest call date of the debt security. The adoption of this guidance did not have a material impact on our consolidated financial statements and related disclosures.

Accounting Guidance Issued But Not Yet Adopted

In July 2021, the FASB issued ASU 2021-05, Lessors-Certain Leases with Variable Lease Payments (Topic 842), which modifies the lease classification for certain leases. Lessors should classify and account for a lease with variable lease payments that do not depend on a reference index or rate as an operating lease if certain criteria are met. This ASU is effective for us on April 1, 2022, with early application permitted. The adoption of this guidance will not have a material impact on our consolidated financial statements and related disclosures.

Investments in Marketable Securities

Investments in marketable securities consist of debt securities and equity investments. We classify all of our debt securities as available-for-sale (“AFS”). Except when fair value option is elected, AFS debt securities are recorded at fair value with unrealized gains or losses included in accumulated other comprehensive income (“AOCI”), net of applicable taxes. All equity investments are recorded at fair value with changes in fair value included in Investment and other income, net in our Consolidated Statements of Income.

In fiscal 2022, we have elected the fair value option for certain debt securities held within one of our affiliate investment portfolios for operational ease given the size and composition of this portfolio. All debt securities within this specific portfolio are recorded at fair value with changes in fair value included in Investment and other income, net in our Consolidated Statements of Income. We estimate the fair value of these securities using observed transaction prices, independent third-party pricing valuation vendors, and internal valuation models. AFS debt securities for which fair value option is elected are not subject to credit loss impairment.

Finance Receivables, Net

Finance receivables, net consists of the retail loan and dealer products portfolio segments, and includes deferred origination costs, deferred income, and allowance for credit losses. Finance receivables, net also includes securitized retail receivables, which represent retail receivables that have been sold for legal purposes to securitization trusts but continue to be included in our consolidated financial statements, as discussed further in Note 8 – Variable Interest Entities. Cash flows from these securitized retail receivables are available only for the repayment of debt issued by these trusts and other obligations arising from the securitization transactions. They are not available for payment of our other obligations or to satisfy claims of our other creditors.

Investments in Operating Leases, Net

Investments in operating leases, net consists of vehicle lease contracts acquired from dealers, and includes deferred origination fees and costs, deferred income, and accumulated depreciation. Securitized investments in operating leases represent beneficial interests in a pool of certain vehicle leases that have been sold for legal purposes to securitization trusts but continue to be included in our consolidated financial statements as discussed further in Note 8 - Variable Interest Entities. Cash flows from these securitized investments in operating leases are available only for the repayment of debt issued by these trusts and other obligations arising from the securitization transactions. They are not available for payment of our other obligations or to satisfy claims of our other creditors.

Derivative Instruments

Our liabilities consist mainly of fixed and variable rate debt, denominated in U.S. dollars and various other currencies, which we issue in the global capital markets, while our assets consist primarily of U.S. dollar denominated, fixed rate receivables. We enter into interest rate swaps, and foreign currency swaps to economically hedge the interest rate and foreign currency risks that result from the different characteristics of our assets and liabilities. Our use of derivative transactions is intended to reduce long-term fluctuations in the fair value of assets and liabilities caused by market movements. All of our derivative activities are authorized and monitored by our management and our Asset-Liability Committee which provides a framework for financial controls and governance to manage market risk.

Offsetting of Derivatives

Accounting guidance permits the net presentation on our Consolidated Balance Sheets of derivative receivables and derivative payables with the same counterparty and the related cash collateral when a legally enforceable master netting agreement exists, or when the derivative receivables and derivative payables meet all the conditions for the right of setoff to exist. When we meet this condition, we elect to present such balances on a net basis.

Over-the-Counter (“OTC”) Derivatives

Our International Swaps and Derivatives Association (“ISDA”) Master Agreements are our master netting agreements which permit multiple transactions to be cancelled and settled with a single net balance paid to either party for our OTC derivatives. The master netting agreements also contain reciprocal collateral agreements which require the transfer of cash collateral to the party in a net asset position across all transactions. Our collateral agreements with substantially all our counterparties include a zero threshold, full collateralization arrangement. Although we have daily valuation and collateral exchange arrangements with all of our counterparties, due to the time required to move collateral, there may be a delay of up to one day between the exchange of collateral and the valuation of our derivatives. We would not be required to post additional collateral to the counterparties with whom we were in a net liability position at September 30, 2021, if our credit ratings were to decline, since we fully collateralize without regard to credit ratings with these counterparties. In addition, as our collateral agreements include legal right of offset provisions, collateral amounts are netted against derivative assets or derivative liabilities, and the net amount is included in Other assets or Other liabilities on our Consolidated Balance Sheets.

Centrally Cleared Derivatives

For our centrally cleared derivatives, variation margin payments are legally characterized as settlement payments and accounted for with corresponding derivative positions as one unit of account as opposed to collateral. Initial margin payments are separately recorded in Other assets on our Consolidated Balance Sheets. We perform valuation and margin exchange on a daily basis. Similar to the OTC swaps, there may be a delay of up to one day between the exchange of margin payments and the valuation of our derivatives.

Consolidated Variable Interest Entities

We use one or more special purpose entities that are considered Variable Interest Entities (“VIEs”) to issue asset-backed securities to third-party bank-sponsored asset-backed securitization vehicles and to investors in securitization transactions. The securities issued by these VIEs are backed by the cash flows related to retail finance receivables and beneficial interests in investments in operating leases (“Securitized Assets”). We hold variable interests in the VIEs that could potentially be significant to the VIEs. We determined that we are the primary beneficiary of the securitization trusts because (i) our servicing responsibilities for the Securitized Assets give us the power to direct the activities that most significantly impact the performance of the VIEs, and (ii) our variable interests in the VIEs give us the obligation to absorb losses and the right to receive residual returns that could potentially be significant.

Revenue Recognition

Voluntary protection operations – Contract revenues

The Voluntary protection operations segment defers contractually determined incentives paid to dealers as contract costs for selling voluntary protection products. These costs are recorded in Other assets on our Consolidated Balance Sheets and are amortized to Operating and administrative expenses in the Consolidated Statements of Income using a methodology consistent with the recognition of revenue. The amount of capitalized dealer incentives and the related amortization was not significant to our consolidated financial statements as of and for the three and six months ended September 30, 2021 and 2020.