Condensed Consolidating Guarantor and Non-Guarantor - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Net Cash Provided by (Used in) Operating Activities	$ (43)	$ 49
Net change in restricted cash and cash equivalents	44	182
Net purchases of marketable securities	(267)	381
Capital expenditures and purchase of equipment leased to others	(402)	(204)
Other investing activities	49	(34)
Net Cash Provided by (Used in) Investing Activities	(576)	325
Net borrowings (repayments) of debt	(222)	(400)
Other Financing Activities	264	(110)
Net Cash Provided by (Used in) Financing Activities	42	(510)
Effect of Exchange Rate on Cash and Cash Equivalents	(5)	(3)
Cash and Cash Equivalents, Period Increase (Decrease)	(582)	(139)
Cash and cash equivalents at beginning of the period	1,087	539
Cash and cash equivalents at end of the period	505	400
Parent Company [Domain]
Net Cash Provided by (Used in) Operating Activities	(648)	(463)
Net change in restricted cash and cash equivalents	(1)	6
Net purchases of marketable securities	(186)	374
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net Cash Provided by (Used in) Investing Activities	(187)	380
Net borrowings (repayments) of debt	327	(50)
Other Financing Activities	24	19
Net Cash Provided by (Used in) Financing Activities	351	(31)
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(484)	(114)
Cash and cash equivalents at beginning of the period	702	226
Cash and cash equivalents at end of the period	218	112
Guarantor Subsidiaries [Domain]
Net Cash Provided by (Used in) Operating Activities	(288)	(267)
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	(304)	(115)
Other investing activities	9	(104)
Net Cash Provided by (Used in) Investing Activities	(295)	(217)
Net borrowings (repayments) of debt	301	519
Other Financing Activities	263	0
Net Cash Provided by (Used in) Financing Activities	564	519
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(19)	35
Cash and cash equivalents at beginning of the period	55	13
Cash and cash equivalents at end of the period	36	48
Non-Guarantor Subsidiaries [Domain]
Net Cash Provided by (Used in) Operating Activities	222	248
Net change in restricted cash and cash equivalents	45	174
Net purchases of marketable securities	(81)	7
Capital expenditures and purchase of equipment leased to others	(98)	(89)
Other investing activities	40	70
Net Cash Provided by (Used in) Investing Activities	(94)	162
Net borrowings (repayments) of debt	(179)	(429)
Other Financing Activities	(23)	(38)
Net Cash Provided by (Used in) Financing Activities	(202)	(467)
Effect of Exchange Rate on Cash and Cash Equivalents	(5)	(3)
Cash and Cash Equivalents, Period Increase (Decrease)	(79)	(60)
Cash and cash equivalents at beginning of the period	330	300
Cash and cash equivalents at end of the period	251	240
Consolidation, Eliminations [Domain]
Net Cash Provided by (Used in) Operating Activities	671	531
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	(671)	(440)
Other Financing Activities	0	(91)
Net Cash Provided by (Used in) Financing Activities	(671)	(531)
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Cash and cash equivalents at beginning of the period	0	0
Cash and cash equivalents at end of the period	$ 0	$ 0