Segment Information - Results by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Financial results by reportable segment
Net revenue:	$ 2,673	$ 1,576	$ 4,680	$ 2,899
Total operating income (loss)	56	(25)	251	184
Unallocated corporate items:
Share-based compensation expense	(336)	(180)	(616)	(291)
Amortization of acquired technology	(42)	(14)	(57)	(21)
Amortization of other acquired intangible assets	(121)	(36)	(174)	(38)
Operating Segments
Financial results by reportable segment
Total operating income (loss)	1,162	647	2,230	1,408
Segment Reconciling Items
Unallocated corporate items:
Share-based compensation expense	(336)	(180)	(616)	(291)
Other corporate expenses	(607)	(442)	(1,132)	(874)
Amortization of acquired technology	(42)	(14)	(57)	(21)
Amortization of other acquired intangible assets	(121)	(36)	(174)	(38)
Total unallocated corporate items	(1,106)	(672)	(1,979)	(1,224)
Small Business & Self-Employed
Financial results by reportable segment
Net revenue:	1,581	1,078	3,024	2,259
Small Business & Self-Employed | Operating Segments
Financial results by reportable segment
Net revenue:	1,581	1,078	3,024	2,259
Total operating income (loss)	773	592	1,694	1,359
Consumer | Operating Segments
Financial results by reportable segment
Net revenue:	411	147	531	266
Total operating income (loss)	53	(155)	42	(151)
Credit Karma | Operating Segments
Financial results by reportable segment
Net revenue:	444	144	862	144
Total operating income (loss)	141	38	310	38
ProConnect | Operating Segments
Financial results by reportable segment
Net revenue:	237	207	263	230
Total operating income (loss)	$ 195	$ 172	$ 184	$ 162