Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income		$ 875	$ 864
Adjustments to reconcile net income to net cash provided by operating activities:
Debt and derivative instrument valuation adjustments		79	319
Provision for credit losses		222	101
Early termination loss on operating leases		70	33
Depreciation on leased vehicles		3,283	3,727
Accretion of unearned subsidy income		(695)	(802)
Amortization of deferred dealer participation and other deferred costs		270	238
Gain on disposition of leased vehicles		(87)	(89)
Deferred income taxes		(496)	(799)
Changes in operating assets and liabilities:
Income taxes receivable/payable		149	115
Other assets		(47)	839
Accrued interest/discounts on debt		161	65
Other liabilities		89	13
Due to/from Parent and affiliated companies		(92)	(32)
Net cash provided by operating activities		3,781	4,592
Cash flows from investing activities:
Finance receivables acquired		(21,530)	(11,455)
Principal collected on finance receivables		13,654	12,966
Net change in wholesale loans		(429)	(306)
Purchase of operating lease vehicles		(10,673)	(6,789)
Disposal of operating lease vehicles		7,838	7,840
Cash received for unearned subsidy income		757	466
Other investing activities, net		(4)	(6)
Net cash (used in)/provided by investing activities		(10,387)	2,716
Cash flows from financing activities:
Proceeds from issuance of commercial paper		31,684	19,358
Paydown of commercial paper		(31,943)	(16,377)
Proceeds from issuance of short-term debt		600	0
Paydown of short-term debt		(74)	0
Proceeds from issuance of medium-term notes and other debt		10,854	515
Paydown of medium-term notes and other debt		(5,558)	(7,759)
Proceeds from issuance of secured debt		5,363	1,373
Paydown of secured debt		(3,591)	(3,782)
Dividends paid		(587)	(961)
Net cash provided by/(used in) financing activities		6,748	(7,633)
Effect of exchange rate changes on cash and cash equivalents		4	1
Net increase/(decrease) in cash and cash equivalents		146	(324)
Cash and cash equivalents and restricted cash at beginning of period		1,964	2,972
Cash and cash equivalents and restricted cash at end of period		2,110	2,648
Supplemental disclosures of cash flow information:
Interest paid		971	368
Income taxes paid		687	996
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents		1,439	2,350
Restricted cash included in other assets	[1]	671	298
Total		$ 2,110	$ 2,648

[1] Restricted cash balances relate to securitization arrangements (Note 9).