Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net earnings	$ 152.0	$ 210.4
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	115.9	111.4
Deferred income tax benefit	(3.8)	(3.5)
Share-based compensation expense	74.5	61.6
Loss on investments, net and other	0.8	3.9
Changes in operating assets and liabilities, net of acquisitions:
Trade accounts receivable	79.0	65.7
Trade finance receivables	64.5	109.7
Prepaid and other current assets	10.3	0.7
Other long-term assets	5.2	12.7
Accrued and other current liabilities	(57.9)	(63.7)
Deferred revenue	(149.0)	(64.5)
Other long-term liabilities	(2.0)	(9.0)
Other operating assets and liabilities	(3.4)	(12.3)
Net cash provided by operating activities	286.1	423.1
Cash flows from investing activities:
Proceeds from maturities of investments	34.0	15.5
Proceeds from sales of investments	9.6	3.3
Purchases of investments	(79.4)	(18.9)
Cash paid for acquisitions, net of cash acquired, and other investments	(19.4)	(148.9)
Capitalization of software development costs	(63.3)	(62.8)
Purchases of property and equipment	(13.3)	(10.0)
Other investing activities	1.9
Net cash used in investing activities	(129.9)	(221.8)
Cash flows from financing activities:
Treasury stock acquired	(350.0)	(405.5)
Repurchases of stock to satisfy employee tax withholding obligations	(20.0)	(23.0)
Proceeds from stock options exercised and other	38.9	37.1
Excess tax benefit from share-based compensation expense	3.4	12.6
Repayments of borrowings and capital lease obligations	(5.6)	(4.7)
Net cash used in financing activities	(333.3)	(383.5)
Effect of exchange rate changes on cash and cash equivalents	(8.6)	(19.0)
Net change in cash and cash equivalents	(185.7)	(201.2)
Cash and cash equivalents, beginning of period	1,496.9	1,660.9
Cash and cash equivalents, end of period	1,311.2	1,459.7
Supplemental disclosure of cash flow information:
Cash paid for interest	22.2	11.6
Cash paid for income taxes, net of amounts refunded	$ 48.6	$ 13.5