Condensed Consolidating Guarantor and Non-Guarantor - Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Net Cash Provided by (Used in) Operating Activities	$ 66	$ 119
Net change in restricted cash and cash equivalents	59	172
Net purchases of marketable securities	305	(279)
Capital expenditures and purchase of equipment leased to others	104	128
Other investing activities	(3)	22
Net Cash Provided by (Used in) Investing Activities	(347)	301
Net borrowings (repayments) of debt	(305)	(384)
Other Financing Activities	2	(94)
Net Cash Provided by (Used in) Financing Activities	(303)	(478)
Effect of Exchange Rate on Cash and Cash Equivalents	(6)	7
Cash and Cash Equivalents, Period Increase (Decrease)	(590)	(51)
Cash and cash equivalents at beginning of the period	1,087	539
Cash and cash equivalents at end of the period	497	488
Parent Company [Domain]
Net Cash Provided by (Used in) Operating Activities	(342)	(269)
Net change in restricted cash and cash equivalents	0	0
Net purchases of marketable securities	242	(248)
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net Cash Provided by (Used in) Investing Activities	(242)	248
Net borrowings (repayments) of debt	21	(77)
Other Financing Activities	15	23
Net Cash Provided by (Used in) Financing Activities	36	(54)
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(548)	(75)
Cash and cash equivalents at beginning of the period	702	226
Cash and cash equivalents at end of the period	154	151
Guarantor Subsidiaries [Domain]
Net Cash Provided by (Used in) Operating Activities	(531)	(68)
Net change in restricted cash and cash equivalents	(1)	0
Net purchases of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	62	74
Other investing activities	0	104
Net Cash Provided by (Used in) Investing Activities	(63)	(178)
Net borrowings (repayments) of debt	589	285
Other Financing Activities	0	0
Net Cash Provided by (Used in) Financing Activities	589	285
Effect of Exchange Rate on Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(5)	39
Cash and cash equivalents at beginning of the period	55	13
Cash and cash equivalents at end of the period	50	52
Non-Guarantor Subsidiaries [Domain]
Net Cash Provided by (Used in) Operating Activities	297	160
Net change in restricted cash and cash equivalents	60	172
Net purchases of marketable securities	63	(31)
Capital expenditures and purchase of equipment leased to others	42	54
Other investing activities	(3)	(82)
Net Cash Provided by (Used in) Investing Activities	(42)	231
Net borrowings (repayments) of debt	(273)	(387)
Other Financing Activities	(13)	(26)
Net Cash Provided by (Used in) Financing Activities	(286)	(413)
Effect of Exchange Rate on Cash and Cash Equivalents	(6)	7
Cash and Cash Equivalents, Period Increase (Decrease)	(37)	(15)
Cash and cash equivalents at beginning of the period	330	300
Cash and cash equivalents at end of the period	293	285
Consolidation, Eliminations [Domain]
Net Cash Provided by (Used in) Operating Activities	642	296
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	(642)	(205)
Other Financing Activities	0	(91)
Net Cash Provided by (Used in) Financing Activities	(642)	(296)
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