Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities
Net Income	$ 781	$ 582
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	282	271
Other deferred taxes	251	26
Share-based compensation expense	82	78
Gain on business combination	(81)	0
Other non-cash items	20	26
Changes in operating assets and liabilities, net of acquisitions:
Receivables	219	(435)
Inventories	16	(269)
Drafts and accounts payable	(629)	880
Deferred revenue	147	191
Taxes	(117)	129
Litigation charges	60	118
Litigation settlement payments	(438)	(6)
Deferred tax expense (benefit) on litigation charges	147	(39)
Other	(281)	(157)
Net cash provided by operating activities	459	1,395
Investing Activities
Property acquisitions	(86)	(126)
Capitalized software expenditures	(81)	(101)
Acquisitions, less cash and cash equivalents acquired	(251)	(194)
Other	67	72
Net cash used in investing activities	(351)	(349)
Financing Activities
Proceeds from short-term borrowings	1,125	0
Repayments of short-term borrowings	(1,525)	0
Repayments of long-term debt	0	(17)
Common stock transactions:
Issuances	80	82
Share repurchases, including shares surrendered for tax withholding	(53)	(672)
Dividends paid	(100)	(97)
Other	40	19
Net cash used in financing activities	(433)	(685)
Effect of exchange rate changes on cash and cash equivalents	7	(30)
Net increase (decrease) in cash and cash equivalents	(318)	331
Cash and cash equivalents at beginning of period	3,149	3,612
Cash and cash equivalents at end of period	$ 2,831	$ 3,943