Discontinued Operations Net Income (Loss) from Discontinued Operations (Details) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2015 USD ($)	Jul. 31, 2016 USD ($) business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	$ 59
Demandforce, QuickBase, and Quicken
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses, net of cash divested		$ 463
Pre-tax gain on sale of discontinued operations		354
Net gain on disposal		$ 173
Number of businesses disposed | business		3