Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 803	$ 916
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,760	1,693
Recognition of deferred income	(587)	(606)
Provision for credit losses	19	(192)
Amortization of deferred costs	272	293
Foreign currency and other adjustments to the carrying value of debt, net	(366)	(749)
Net gain (loss) from sale of investments in marketable securities	(7)	23
Net change in:
Restricted cash	66	30
Derivative assets	21	191
Other assets (Note 8) and accrued income	39	133
Deferred income taxes	482	553
Derivative liabilities	(25)	36
Other liabilities	188	(50)
Net cash provided by operating activities	2,665	2,271
Cash flows from investing activities:
Purchase of investments in marketable securities	(3,021)	(3,829)
Proceeds from sales of investments in marketable securities	227	1,282
Proceeds from maturities of investments in marketable securities	2,379	2,893
Acquisition of finance receivables	(13,418)	(11,243)
Collection of finance receivables	11,402	11,236
Net change in wholesale and certain working capital receivables	(1,042)	2,425
Acquisition of investments in operating leases	(4,874)	(3,799)
Disposals of investments in operating leases	2,588	2,938
Advances to affiliates	(2,635)	(1,486)
Repayments from affiliates	2,801	1,611
Other, net	(9)	(7)
Net cash (used in) provided by investing activities	(5,602)	2,021
Cash flows from financing activities:
Proceeds from issuance of debt	9,636	7,417
Payments on debt	(6,772)	(9,085)
Net change in commercial paper	2,923	(1,352)
Advances from affiliates	48	5
Repayments to affiliates	(2,048)	(5)
Dividends paid to TFSA	(744)	(741)
Net cash provided by (used in) financing activities	3,043	(3,761)
Net increase in cash and cash equivalents	106	531
Cash and cash equivalents at the beginning of the period	5,060	6,830
Cash and cash equivalents at the end of the period	5,166	7,361
Supplemental disclosures:
Interest paid	639	826
Income taxes received, net	(2)	(117)
Non-cash financing:
Capital contribution for stock-based compensation	$ 0	$ 1