Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Cash flows from operating activities:
Net income	$ 1,486	$ 1,853	$ 1,063
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,410	3,428	3,683
Recognition of deferred income	(1,183)	(1,251)	(1,032)
Provision for credit losses	(98)	(433)	604
Amortization of deferred costs	575	541	447
Foreign currency and other adjustments to the carrying value of debt, net	(1,893)	1,767	2,410
Net loss (gain) from sale of marketable securities	25	(47)	(15)
Other-than-temporary impairment on investment in marketable securities	0	0	7
Net change in:
Restricted cash	23	(532)	(173)
Derivative assets	832	(317)	(411)
Other assets (Note 8) and accrued income	74	(49)	151
Deferred income taxes	954	1,136	733
Derivative liabilities	(136)	(364)	(774)
Other liabilities	(217)	39	110
Net cash provided by operating activities	3,852	5,771	6,803
Cash flows from investing activities:
Purchase of investments in marketable securities	(7,696)	(5,695)	(1,097)
Proceeds from sales of investments in marketable securities	1,571	1,917	786
Proceeds from maturities of investments in marketable securities	6,355	1,517	260
Acquisition of finance receivables (excluding wholesale)	(22,149)	(23,294)	(21,196)
Collection of finance receivables (excluding wholesale)	22,341	21,765	20,554
Net change in wholesale receivables	(267)	(484)	(189)
Acquisition of investments in operating leases	(7,619)	(10,112)	(7,241)
Disposals of investments in operating leases	5,233	5,479	4,805
Advances to affiliates	(3,851)	(2,815)	(2,313)
Repayments from affiliates	3,451	2,468	3,269
Other, net	(32)	(32)	(25)
Net cash used in investing activities	(2,663)	(9,286)	(2,387)
Cash flows from financing activities:
Proceeds from issuance of debt (excluding commercial paper)	20,308	21,879	11,833
Payments on debt (excluding commercial paper)	(21,824)	(16,096)	(21,595)
Net change in commercial paper	1,298	469	1,477
Advances from affiliates	6	33	2,001
Repayments to affiliates	(2,006)	(17)	(37)
Dividends paid to TFSA	(741)	(266)	(50)
Net cash (used in) provided by financing activities	(2,959)	6,002	(6,371)
Net (decrease) increase in cash and cash equivalents	(1,770)	2,487	(1,955)
Cash and cash equivalents at the beginning of the period	6,830	4,343	6,298
Cash and cash equivalents at the end of the period	5,060	6,830	4,343
Supplemental disclosures:
Interest paid	1,591	1,733	2,124
Income taxes (received) paid, net	(112)	35	(207)
Non-cash financing:
Capital contribution for stock-based compensation	$ 1	$ 0	$ 0