Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011
Cash flows from operating activities:
Net income (loss)	$ 118	$ 73	$ 54	$ 3
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	44	41	88	78
Amortization of acquired intangible assets	17	20	45	39
Share-based compensation expense	43	38	83	73
Deferred income taxes	(12)	(9)	(17)	16
Tax benefit from share-based compensation plans	15	16	45	48
Excess tax benefit from share-based compensation plans	(14)	(14)	(43)	(41)
Other	8	6	2	11
Total adjustments	101	98	203	224
Changes in operating assets and liabilities:
Accounts receivable	(426)	(333)	(421)	(345)
Prepaid expenses, income taxes receivable and other assets	60	19	(18)	(115)
Accounts payable	45	41	84	46
Accrued compensation and related liabilities	27	23	(47)	(59)
Deferred revenue	207	214	182	185
Income taxes payable	0	0	1	(13)
Other liabilities	128	123	112	121
Total changes in operating assets and liabilities	41	87	(107)	(180)
Net cash provided by (used in) operating activities	260	258	150	47
Cash flows from investing activities:
Purchases of available-for-sale debt securities	(146)	(295)	(343)	(723)
Sales of available-for-sale debt securities	130	777	266	1,415
Maturities of available-for-sale debt securities	48	87	89	221
Net change in money market funds and other cash equivalents held to satisfy customer fund obligations	(9)	52	84	26
Net change in customer fund deposits	9	(26)	(84)	0
Purchases of property and equipment	(48)	(84)	(92)	(135)
Acquisitions of intangible assets	0	0	0	(3)
Other	1	8	15	3
Net cash (used in) provided by investing activities	(15)	519	(65)	804
Cash flows from financing activities:
Net proceeds from issuance of treasury stock under stock plans	61	61	106	187
Purchases of treasury stock	(331)	(530)	(586)	(860)
Cash dividends paid to stockholders	(44)	0	(89)	0
Excess tax benefit from share-based compensation plans	14	14	43	41
Net cash used in financing activities	(300)	(455)	(526)	(632)
Effect of exchange rates on cash and cash equivalents	(1)	(1)	(4)	0
Net increase (decrease) in cash and cash equivalents	(56)	321	(445)	219
Cash and cash equivalents at beginning of period	333	112	722	214
Cash and cash equivalents at end of period	$ 277	$ 433	$ 277	$ 433