Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 267	$ 932	$ 1,197
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,916	5,965	4,895
Recognition of deferred income	(1,779)	(1,713)	(1,539)
Provision for credit losses	582	441	308
Amortization of deferred costs	625	620	569
Foreign currency and other adjustments to the carrying value of debt, net	(704)	1,195	(2,321)
Net realized gains from sales and other-than-temporary impairment on available-for-sale securities	(226)	(6)	(70)
Gain on sale of commercial finance business	0	(197)	0
Net change in:
Restricted cash	(77)	(226)	(140)
Derivative assets	17	(15)	(4)
Other assets (Note 8) and accrued interest	(167)	66	(350)
Deferred income taxes	(3)	531	760
Derivative liabilities	39	(83)	84
Other liabilities	347	329	378
Net cash provided by operating activities	5,837	7,839	3,767
Cash flows from investing activities:
Purchase of investments in marketable securities	(3,702)	(7,447)	(6,164)
Proceeds from sales of investments in marketable securities	875	914	991
Proceeds from maturities of investments in marketable securities	3,656	7,026	3,529
Acquisition of finance receivables	(25,497)	(24,956)	(25,584)
Collection of finance receivables	24,324	24,523	24,602
Net change in wholesale and certain working capital receivables	(1,859)	(512)	222
Acquisition of investments in operating leases	(17,947)	(19,917)	(16,969)
Disposals of investments in operating leases	10,230	8,283	6,444
Proceeds from sale of commercial finance business	0	2,317	0
Net change in financing support provided to affiliates	354	7	(12)
Cash equivalents unrestricted to acquire finance receivables and investment in operating leases, net	0	0	1,077
Other, net	(110)	(68)	(57)
Net cash used in investing activities	(9,676)	(9,830)	(11,921)
Cash flows from financing activities:
Proceeds from issuance of debt	28,817	25,564	25,817
Payments on debt	(23,463)	(22,865)	(17,934)
Net change in commercial paper	(12)	(410)	(704)
Net change in financing support provided by affiliates	(6)	(4)	2
Dividend paid to TFSIC	0	0	(435)
Net cash provided by financing activities	5,336	2,285	6,746
Net increase (decrease) in cash and cash equivalents	1,497	294	(1,408)
Cash and cash equivalents at the beginning of the period	2,701	2,407	3,815
Cash and cash equivalents at the end of the period	4,198	2,701	2,407
Supplemental disclosures:
Interest paid, net	1,406	1,190	1,048
Income taxes paid (received), net	$ 53	$ (95)	$ 143