Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Net cash provided by (used in) operations	$ (336)	$ 100	$ 610
Net change in restricted cash and cash equivalents	(80)	70	165
Net sales of marketable securities	225	(364)	252
Capital expenditures and purchase of equipment leased to others	(277)	(599)	(370)
Other investing activities	57	83	(49)
Net cash used in investing activities	(75)	(810)	(2)
Net borrowings (repayments) of debt	150	116	69
Other financing activities	0	4	(3)
Net cash provided by (used in) financing activities	179	393	(63)
Effect of exchange rate changes on cash and cash equivalents	(26)	(15)	3
Increase (decrease) in cash and cash equivalents	(258)	(332)	548
Decrease in cash and cash equivalents	755	1,087	539
Cash and cash equivalents at beginning of the year	497	755	1,087
Other financing activities	29	277	(132)
Parent Company [Member]
Net cash provided by (used in) operations	(285)	(669)	350
Net change in restricted cash and cash equivalents	5	0	(4)
Net sales of marketable securities	203	(267)	115
Capital expenditures and purchase of equipment leased to others	0	0	0
Other investing activities	0	0	0
Net cash used in investing activities	208	(267)	111
Net borrowings (repayments) of debt	(176)	540	171
Net cash provided by (used in) financing activities	(158)	570	15
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Increase (decrease) in cash and cash equivalents	(235)	(366)	476
Decrease in cash and cash equivalents	336	702	226
Cash and cash equivalents at beginning of the year	101	336	702
Other financing activities	18	30	(156)
Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	(1,287)	(355)	(183)
Net change in restricted cash and cash equivalents	(1)	5	1
Net sales of marketable securities	0	0	0
Capital expenditures and purchase of equipment leased to others	(114)	(422)	(213)
Other investing activities	17	87	(157)
Net cash used in investing activities	(98)	(330)	(369)
Net borrowings (repayments) of debt	1,306	409	594
Net cash provided by (used in) financing activities	1,366	702	594
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Increase (decrease) in cash and cash equivalents	(19)	17	42
Decrease in cash and cash equivalents	72	55	13
Cash and cash equivalents at beginning of the year	53	72	55
Other financing activities	60	293	0
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	(112)	401	901
Net change in restricted cash and cash equivalents	(84)	65	168
Net sales of marketable securities	22	(97)	137
Capital expenditures and purchase of equipment leased to others	(163)	(177)	(157)
Other investing activities	40	(4)	108
Net cash used in investing activities	(185)	(213)	256
Net borrowings (repayments) of debt	409	(40)	(1,245)
Net cash provided by (used in) financing activities	319	(156)	(1,130)
Effect of exchange rate changes on cash and cash equivalents	(26)	(15)	3
Increase (decrease) in cash and cash equivalents	(4)	17	30
Decrease in cash and cash equivalents	347	330	300
Cash and cash equivalents at beginning of the year	343	347	330
Other financing activities	(90)	(116)	115
Consolidation, Eliminations [Member]
Net cash provided by (used in) operations	1,348	723	(458)
Net change in restricted cash and cash equivalents	0	0	0
Net sales of marketable securities	0	0	0
Capital expenditures and purchase of equipment leased to others	0	0	0
Other investing activities	0	0	0
Net cash used in investing activities	0	0	0
Net borrowings (repayments) of debt	(1,389)	(793)	549
Net cash provided by (used in) financing activities	(1,348)	(723)	458
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Increase (decrease) in cash and cash equivalents	0	0	0
Decrease in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of the year	0	0	0
Other financing activities	$ 41	$ 70	$ (91)