Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions		1 Months Ended
	Aug. 05, 2021	Apr. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Related Party Transaction [Line Items]
Subvention support receivable			$ 138	$ 184
Toyota Finance New Zealand Limited [Member] | Financing Support to Affiliates [Member]
Related Party Transaction [Line Items]
Increase in financing support available to affiliates		$ 250
Toyota Financial Savings Bank [Member] | Financing Support to Affiliates [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Increase in financing support available to affiliates	$ 1,000