Goodwill and Acquired Intangible Assets (Details) (USD $) In Millions	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Goodwill [Roll Forward]
Goodwill, beginning	$ 1,914	$ 1,754
Goodwill, Acquired During Period	(4)	160
Goodwill, impairment loss	(24)	0	0
Goodwill, ending	1,886	1,914	1,754
Financial management solutions [Member]
Goodwill [Roll Forward]
Goodwill, beginning	151	152
Goodwill, Acquired During Period	0	(1)
Goodwill, impairment loss	0
Goodwill, ending	151	151
Employee management solutions [Member]
Goodwill [Roll Forward]
Goodwill, beginning	271	274
Goodwill, Acquired During Period	0	(3)
Goodwill, impairment loss	0
Goodwill, ending	271	271
Payment solutions [Member]
Goodwill [Roll Forward]
Goodwill, beginning	182	182
Goodwill, Acquired During Period	0	0
Goodwill, impairment loss	0
Goodwill, ending	182	182
Consumer tax [Member]
Goodwill [Roll Forward]
Goodwill, beginning	30	30
Goodwill, Acquired During Period	0	0
Goodwill, impairment loss	0
Goodwill, ending	30	30
Accounting professionals [Member]
Goodwill [Roll Forward]
Goodwill, beginning	90	90
Goodwill, Acquired During Period	0	0
Goodwill, impairment loss	0
Goodwill, ending	90	90
Financial services [Member]
Goodwill [Roll Forward]
Goodwill, beginning	1,009	1,009
Goodwill, Acquired During Period	(4)	0
Goodwill, impairment loss	0
Goodwill, ending	1,005	1,009
Other businesses [Member]
Goodwill [Roll Forward]
Goodwill, beginning	181	17
Goodwill, Acquired During Period	0	164
Goodwill, impairment loss	(24)
Goodwill, ending	$ 157	$ 181