Discontinued Operations Net Income (Loss) from Discontinued Operations (Details) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2016 USD ($)	Apr. 30, 2015 USD ($)	Apr. 30, 2016 USD ($)	Apr. 30, 2015 USD ($)	Feb. 01, 2016 business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses			$ 463	$ 0
Pre-tax gain on sale of discontinued operations			354	0
Number of businesses held for sale | business					3
Income tax provision	$ 178
Net gain on disposal	176	$ 0	173	0
Net revenue from discontinued operations	22	59	137	179
Income (loss) from discontinued operations before income taxes	3	(161)	(2)	(175)
Net income (loss) from discontinued operations	178	(155)	173	(164)
Demandforce
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	0	28	49	89
Income (loss) from discontinued operations before income taxes	0	(18)	(10)	(46)
Net income (loss) from discontinued operations	0	(9)	(6)	(28)
QuickBase
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	14	18	54	52
Income (loss) from discontinued operations before income taxes	4	3	10	10
Net income (loss) from discontinued operations	2	1	6	6
Quicken
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	8	13	34	38
Income (loss) from discontinued operations before income taxes	(1)	(146)	(2)	(139)
Net income (loss) from discontinued operations	$ 0	$ (147)	$ 0	$ (142)