Condensed Consolidating Guarantor and Non-Guarantor - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Net Cash Provided by (Used in) Operating Activities	$ 34	$ 346
Net change in restricted cash and cash equivalents	(9)	48
Net purchases of marketable securities	(242)	558
Capital expenditures and purchase of equipment leased to others	(487)	(299)
Other investing activities	47	(31)
Net cash provided by (used in) investing activities	(691)	276
Net borrowings (repayments) of debt	(254)	(487)
Other Financing Activities	268	(120)
Net cash provided by (used in) financing activities	14	(607)
Effect of exchange rate changes on cash and cash equivalents	(19)	(7)
Increase (decrease) in cash and cash equivalents	(662)	8
Cash and cash equivalents at beginning of the period	1,087	539
Cash and cash equivalents at end of the period	425	547
Parent Company [Domain]
Net Cash Provided by (Used in) Operating Activities	(771)	(330)
Net change in restricted cash and cash equivalents	(1)	0
Net purchases of marketable securities	(147)	383
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by (used in) investing activities	(148)	383
Net borrowings (repayments) of debt	340	(47)
Other Financing Activities	26	20
Net cash provided by (used in) financing activities	366	(27)
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	(553)	26
Cash and cash equivalents at beginning of the period	702	226
Cash and cash equivalents at end of the period	149	252
Guarantor Subsidiaries [Domain]
Net Cash Provided by (Used in) Operating Activities	(639)	(362)
Net change in restricted cash and cash equivalents	2	3
Net purchases of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	(347)	(173)
Other investing activities	10	(117)
Net cash provided by (used in) investing activities	(335)	(287)
Net borrowings (repayments) of debt	688	691
Other Financing Activities	277	0
Net cash provided by (used in) financing activities	965	691
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	(9)	42
Cash and cash equivalents at beginning of the period	55	13
Cash and cash equivalents at end of the period	46	55
Non-Guarantor Subsidiaries [Domain]
Net Cash Provided by (Used in) Operating Activities	382	458
Net change in restricted cash and cash equivalents	(10)	45
Net purchases of marketable securities	(95)	175
Capital expenditures and purchase of equipment leased to others	(140)	(126)
Other investing activities	37	86
Net cash provided by (used in) investing activities	(208)	180
Net borrowings (repayments) of debt	(220)	(643)
Other Financing Activities	(35)	(48)
Net cash provided by (used in) financing activities	(255)	(691)
Effect of exchange rate changes on cash and cash equivalents	(19)	(7)
Increase (decrease) in cash and cash equivalents	(100)	(60)
Cash and cash equivalents at beginning of the period	330	300
Cash and cash equivalents at end of the period	230	240
Consolidation, Eliminations [Domain]
Net Cash Provided by (Used in) Operating Activities	1,062	580
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	(1,062)	(488)
Other Financing Activities	0	(92)
Net cash provided by (used in) financing activities	(1,062)	(580)
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (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