Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Net Cash Provided by (Used in) Operating Activities	$ (344)	$ 34
Net change in restricted cash and cash equivalents	(30)	(9)
Net purchases of marketable securities	212	(242)
Capital expenditures and purchase of equipment leased to others	(214)	(487)
Other investing activities	46	47
Net cash provided by (used in) investing activities	14	(691)
Net borrowings (repayments) of debt	112	(254)
Other financing activities	22	268
Net cash provided by financing activities	134	14
Effect of exchange rate changes on cash and cash equivalents	(12)	(19)
Decrease in cash and cash equivalents	(208)	(662)
Cash and cash equivalents at beginning of the period	755	1,087
Cash and cash equivalents at end of the period	547	425
Parent Company [Member]
Net Cash Provided by (Used in) Operating Activities	(528)	(771)
Net change in restricted cash and cash equivalents	6	(1)
Net purchases of marketable securities	315	(147)
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by (used in) investing activities	321	(148)
Net borrowings (repayments) of debt	(11)	340
Other financing activities	18	26
Net cash provided by financing activities	7	366
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	(200)	(553)
Cash and cash equivalents at beginning of the period	336	702
Cash and cash equivalents at end of the period	136	149
Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	(1,078)	(639)
Net change in restricted cash and cash equivalents	0	2
Net purchases of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	(89)	(347)
Other investing activities	22	10
Net cash provided by (used in) investing activities	(67)	(335)
Net borrowings (repayments) of debt	1,067	688
Other financing activities	44	277
Net cash provided by financing activities	1,111	965
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	(34)	(9)
Cash and cash equivalents at beginning of the period	72	55
Cash and cash equivalents at end of the period	38	46
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities	156	382
Net change in restricted cash and cash equivalents	(36)	(10)
Net purchases of marketable securities	(103)	(95)
Capital expenditures and purchase of equipment leased to others	(125)	(140)
Other investing activities	24	37
Net cash provided by (used in) investing activities	(240)	(208)
Net borrowings (repayments) of debt	192	(220)
Other financing activities	(70)	(35)
Net cash provided by financing activities	122	(255)
Effect of exchange rate changes on cash and cash equivalents	(12)	(19)
Decrease in cash and cash equivalents	26	(100)
Cash and cash equivalents at beginning of the period	347	330
Cash and cash equivalents at end of the period	373	230
Consolidation, Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities	1,106	1,062
Net change in restricted cash and cash equivalents	0	0
Net purchases of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by (used in) investing activities	0	0
Net borrowings (repayments) of debt	(1,136)	(1,062)
Other financing activities	30	0
Net cash provided by financing activities	(1,106)	(1,062)
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of the period	0	0
Cash and cash equivalents at end of the period	$ 0	$ 0