Stockholders' Deficit - Schedule of Accumulated Other Comprehensive Loss, Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	$ (3,889)
Other comprehensive income (loss) before reclassifications	(178)
Reclassifications of losses into earnings	(53)
Balance at end of period	(4,327)
Accumulated other comprehensive loss
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	(1,438)
Balance at end of period	(1,669)
Net unrealized gains on available-for-sale securities
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	9
Other comprehensive income (loss) before reclassifications	2	$ 0
Reclassifications of losses into earnings	0
Balance at end of period	11
Net unrealized gains (losses) on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	186
Other comprehensive income (loss) before reclassifications	(172)	116
Reclassifications of losses into earnings	(67)	$ (26)
Balance at end of period	(53)
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	(1,633)
Other comprehensive income (loss) before reclassifications	(8)
Reclassifications of losses into earnings	14
Balance at end of period	$ (1,627)