Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income	$ 362	$ 410
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	190	163
Deferred income taxes	(23)	(11)
Provision for bad debts	2	2
Share-based compensation expense	61	54
Other non-cash items	2	3
Foreign currency transaction losses (gains)	9	(1)
Changes in other operating assets and liabilities, net of effect of acquisitions:
Decrease in trade accounts receivable	317	176
Decrease in deferred revenue	(460)	(562)
Decrease in taxes payable, net	(58)	(82)
Increase in accounts payable, accrued expenses and other	11	19
Decrease in accrued salaries, wages and commissions	(81)	(47)
Changes in other operating assets and liabilities, net	3	17
Net cash provided by operating activities	335	141
Investing activities:
Acquisitions of businesses, net of cash acquired, and purchased software	(15)	(1)
Purchases of property and equipment	(22)	(16)
Other investing activities	(1)	0
Net cash used in investing activities	(38)	(17)
Financing activities:
Dividends paid	(215)	(214)
Purchases of common stock	(90)	(100)
Notional pooling borrowings	1,173	467
Notional pooling repayments	(1,204)	(456)
Debt repayments	(9)	(4)
Debt issuance costs	(3)	0
Exercise of common stock options	5	22
Payments related to tax withholding for share-based compensation	(35)	(34)
Other financing activities	(3)	0
Net cash used in financing activities	(381)	(319)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	136	(32)
Increase (decrease) in cash, cash equivalents and restricted cash	52	(227)
Cash, cash equivalents and restricted cash at beginning of period	2,772	2,813
Cash, cash equivalents and restricted cash at end of period	$ 2,824	$ 2,586