Stockholders' Equity (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Components of accumulated other comprehensive loss, net of taxes
Balance at the beginning of the period	$ (3,778)
Other comprehensive income (loss) before reclassifications	(14)
Amounts reclassified from accumulated other comprehensive income	125
Balance at the end of the period	(3,667)
Net unrealized gain on available-for-sale securities
Components of accumulated other comprehensive loss, net of taxes
Balance at the beginning of the period	76
Other comprehensive income (loss) before reclassifications		(30)
Amounts reclassified from accumulated other comprehensive income	(1)
Balance at the end of the period	75
Net unrealized loss on cash flow hedges
Components of accumulated other comprehensive loss, net of taxes
Balance at the beginning of the period	(188)
Other comprehensive income (loss) before reclassifications	30	(212)
Amounts reclassified from accumulated other comprehensive income	75
Balance at the end of the period	(83)
Unrealized components of defined benefit plans
Components of accumulated other comprehensive loss, net of taxes
Balance at the beginning of the period	(3,084)
Amounts reclassified from accumulated other comprehensive income	51
Balance at the end of the period	(3,033)
Cumulative translation adjustment
Components of accumulated other comprehensive loss, net of taxes
Balance at the beginning of the period	(582)
Other comprehensive income (loss) before reclassifications	(44)	(8)
Balance at the end of the period	$ (626)