Stockholders' Equity - Schedule of Changes and Reclassifications Related to Other Comprehensive Income, Net of Taxes Footnotes (Details) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenue	$ (11,892)	$ (12,362)	$ (35,726)	$ (39,197)
Cost of revenue	9,720	10,036	29,019	31,624
Interest and other, net	36	90	135	289
Continuing Operations	(843)	(700)	(2,153)	(2,203)
Discontinued Operations	60	(154)	149	(1,028)
Total	(783)	(854)	(2,004)	(3,231)
Net unrealized (losses) gains on cash flow hedges | Reclassifications of losses (gains) into earnings
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenue	140	(160)	(26)	(825)
Cost of revenue	18	46	90	118
Operating expenses	(1)	1	(1)	3
Interest and other, net	2	25	0	25
Continuing Operations	159	(88)	63	(679)
Discontinued Operations	0	(71)	0	(370)
Total	$ 159	$ (159)	$ 63	$ (1,049)