Goodwill and Acquired Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 13,736	$ 5,613
Goodwill Acquired/ Adjusted	41	8,132
Foreign Currency Translation	3	(9)
Goodwill, ending balance	13,780	13,736
Small Business & Self-Employed
Goodwill [Roll Forward]
Goodwill, beginning balance	9,689	1,578
Goodwill Acquired/ Adjusted	1	8,115
Foreign Currency Translation	1	(4)
Goodwill, ending balance	9,691	9,689
Goodwill net of accumulated impairment losses			$ 114
Consumer
Goodwill [Roll Forward]
Goodwill, beginning balance	51	42
Goodwill Acquired/ Adjusted	0	10
Foreign Currency Translation	0	(1)
Goodwill, ending balance	51	51
Credit Karma
Goodwill [Roll Forward]
Goodwill, beginning balance	3,899	3,898
Goodwill Acquired/ Adjusted	40	5
Foreign Currency Translation	2	(4)
Goodwill, ending balance	3,941	3,899
ProTax
Goodwill [Roll Forward]
Goodwill, beginning balance	97	95
Goodwill Acquired/ Adjusted	0	2
Foreign Currency Translation	0	0
Goodwill, ending balance	$ 97	$ 97