Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Cash flows from operating activities:
Net income	$ 71	$ 118	$ 52	$ 54
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	42	44	82	88
Amortization of acquired intangible assets	16	17	30	45
Share-based compensation expense	47	43	96	83
Pre-tax gain on sale of discontinued operations	0	0	(53)	0
Deferred income taxes	(5)	(12)	48	(17)
Tax benefit from share-based compensation plans	12	15	56	45
Excess tax benefit from share-based compensation plans	(12)	(14)	(56)	(43)
Other	5	8	9	2
Total adjustments	105	101	212	203
Changes in operating assets and liabilities:
Accounts receivable	(357)	(426)	(358)	(421)
Prepaid expenses, income taxes receivable and other assets	(17)	60	(145)	(18)
Accounts payable	46	45	58	84
Accrued compensation and related liabilities	48	27	(48)	(47)
Deferred revenue	233	207	217	182
Income taxes payable	1	0	1	1
Other liabilities	126	128	122	112
Total changes in operating assets and liabilities	80	41	(153)	(107)
Net cash provided by operating activities	256	260	111	150
Cash flows from investing activities:
Purchases of available-for-sale debt securities	(123)	(146)	(210)	(343)
Sales of available-for-sale debt securities	109	130	190	266
Maturities of available-for-sale debt securities	74	48	95	89
Net change in money market funds and other cash equivalents held to satisfy customer fund obligations	(75)	(9)	6	84
Net change in customer fund deposits	75	9	(6)	(84)
Purchases of property and equipment	(45)	(48)	(115)	(92)
Proceeds from divestiture of businesses	0	0	60	0
Other	(17)	1	(22)	15
Net cash used in investing activities	(2)	(15)	(2)	(65)
Cash flows from financing activities:
Net proceeds from issuance of treasury stock under employee stock plans	68	61	141	106
Purchases of treasury stock	(100)	(331)	(200)	(586)
Cash dividends paid to stockholders	(51)	(44)	(101)	(89)
Excess tax benefit from share-based compensation plans	12	14	56	43
Net cash used in financing activities	(71)	(300)	(104)	(526)
Effect of exchange rates on cash and cash equivalents	0	(1)	1	(4)
Net increase (decrease) in cash and cash equivalents	183	(56)	6	(445)
Cash and cash equivalents at beginning of period	216	333	393	722
Cash and cash equivalents at end of period	$ 399	$ 277	$ 399	$ 277