Goodwill and Acquired Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 5,613	$ 1,654
Goodwill Acquired	8,132	3,957
Foreign Currency Translation	(9)	2
Goodwill, ending balance	13,736	5,613
Small Business & Self-Employed
Goodwill [Roll Forward]
Goodwill, beginning balance	1,578	1,518
Goodwill Acquired	8,115	59
Foreign Currency Translation	(4)	1
Goodwill, ending balance	9,689	1,578
Goodwill net of accumulated impairment losses			$ 114
Consumer
Goodwill [Roll Forward]
Goodwill, beginning balance	42	42
Goodwill Acquired	10	0
Foreign Currency Translation	(1)	0
Goodwill, ending balance	51	42
Credit Karma
Goodwill [Roll Forward]
Goodwill, beginning balance	3,898	0
Goodwill Acquired	5	3,898
Foreign Currency Translation	(4)	0
Goodwill, ending balance	3,899	3,898
ProConnect
Goodwill [Roll Forward]
Goodwill, beginning balance	95	94
Goodwill Acquired	2	0
Foreign Currency Translation	0	1
Goodwill, ending balance	$ 97	$ 95