Goodwill and Acquired Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 13,780	$ 13,736
Goodwill Acquired/ Adjusted	65	41
Foreign Currency Translation	(1)	3
Goodwill, ending balance	13,844	13,780
Small Business & Self-Employed
Goodwill [Roll Forward]
Goodwill, beginning balance	9,691	9,689
Goodwill Acquired/ Adjusted	0	1
Foreign Currency Translation	(1)	1
Goodwill, ending balance	9,690	9,691
Goodwill net of accumulated impairment losses			$ 114
Consumer
Goodwill [Roll Forward]
Goodwill, beginning balance	51	51
Goodwill Acquired/ Adjusted	0	0
Foreign Currency Translation	0	0
Goodwill, ending balance	51	51
ProTax
Goodwill [Roll Forward]
Goodwill, beginning balance	97	97
Goodwill Acquired/ Adjusted	0	0
Foreign Currency Translation	0	0
Goodwill, ending balance	97	97
Credit Karma
Goodwill [Roll Forward]
Goodwill, beginning balance	3,941	3,899
Goodwill Acquired/ Adjusted	65	40
Foreign Currency Translation	0	2
Goodwill, ending balance	$ 4,006	$ 3,941