Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income	$ 1,712	$ 1,460	$ 979
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,221	4,301	5,205
Recognition of deferred income and fees	(1,604)	(1,507)	(1,797)
Provision for credit losses	768	839	713
Amortization of deferred costs	1,044	1,030	1,029
Foreign currency and other adjustments to the carrying value of financial instruments, net	41	180	206
Net (gains) losses from investments in marketable securities	(90)	(145)	375
Net change in:
Derivative assets	(5)	10	10
Other assets and accrued interest	42	91	(1,040)
Deferred income taxes	(302)	(453)	2,173
Derivative liabilities	4	6	(8)
Other liabilities	472	1,003	(505)
Net cash provided by operating activities	6,303	6,815	7,340
Cash flows from investing activities:
Purchase of investments in marketable securities	(681)	(727)	(2,467)
Proceeds from sales of investments in marketable securities	593	1,282	1,902
Proceeds from maturities of investments in marketable securities	122	113	59
Acquisition of finance receivables	(52,117)	(54,549)	(49,105)
Collection of finance receivables	51,241	44,692	41,309
Net change in certain wholesale receivables	267	(2,442)	(930)
Acquisition of investments in operating leases	(17,870)	(13,755)	(9,617)
Proceeds from disposals of investments in operating leases	11,730	11,888	11,001
Long term loans to affiliates	(1,536)	(1,145)	(760)
Payments on long term loans from affiliates	545	669	340
Net change in financing support provided to affiliates	67	(5)	(36)
Other, net	(52)	(74)	(83)
Net cash used in investing activities	(7,691)	(14,053)	(8,387)
Cash flows from financing activities:
Proceeds from issuance of debt	47,799	43,413	38,797
Payments on debt	(42,573)	(33,498)	(35,374)
Net change in commercial paper and other short-term financing	53	635	(1,088)
Net change in financing support provided by affiliates	7	0	0
Dividend paid	(1,460)	(979)	(2,535)
Net cash provided by (used in) financing activities	3,826	9,571	(200)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	2,438	2,333	(1,247)
Cash and cash equivalents and restricted cash and cash equivalents at the beginning of the period	10,821	8,488	9,735
Cash and cash equivalents and restricted cash and cash equivalents at the end of the period	13,259	10,821	8,488
Supplemental disclosures:
Interest paid, net	5,073	4,010	2,375
Income taxes paid (received), net	$ 540	$ 57	$ (462)