Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Net cash provided by (used in) operations	$ (102)	$ (211)
Net change in restricted cash and cash equivalents	(1)	53
Net sales of marketable securities	7	430
Capital expenditures and purchase of equipment leased to others	(78)	(27)
Other investing activities	13	1
Net cash provided by (used in) investing activities	(59)	457
Net borrowings (repayments) of debt	(173)	(107)
Other financing activities	(2)	(2)
Net cash used in financing activities	(175)	(109)
Effect of exchange rate changes on cash and cash equivalents	3	(14)
Increase (decrease) in cash and cash equivalents	(333)	123
Cash and cash equivalents at beginning of the period	912	497
Cash and cash equivalents at end of the period	579	620
Parent Company [Member]
Net cash provided by (used in) operations	(309)	(194)
Net change in restricted cash and cash equivalents	0	0
Net sales of marketable securities	110	278
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by (used in) investing activities	110	278
Net borrowings (repayments) of debt	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	(199)	84
Cash and cash equivalents at beginning of the period	456	101
Cash and cash equivalents at end of the period	257	185
Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	(332)	(46)
Net change in restricted cash and cash equivalents	1	(3)
Net sales of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	(17)	(8)
Other investing activities	0	0
Net cash provided by (used in) investing activities	(16)	(11)
Net borrowings (repayments) of debt	292	34
Other financing activities	7	10
Net cash used in financing activities	299	44
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	(49)	(13)
Cash and cash equivalents at beginning of the period	81	53
Cash and cash equivalents at end of the period	32	40
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	226	(112)
Net change in restricted cash and cash equivalents	(2)	56
Net sales of marketable securities	(103)	152
Capital expenditures and purchase of equipment leased to others	(61)	(19)
Other investing activities	13	1
Net cash provided by (used in) investing activities	(153)	190
Net borrowings (repayments) of debt	(152)	(80)
Other financing activities	(9)	68
Net cash used in financing activities	(161)	(12)
Effect of exchange rate changes on cash and cash equivalents	3	(14)
Increase (decrease) in cash and cash equivalents	(85)	52
Cash and cash equivalents at beginning of the period	375	343
Cash and cash equivalents at end of the period	290	395
Consolidation, Eliminations [Member]
Net cash provided by (used in) operations	313	141
Net change in restricted cash and cash equivalents	0	0
Net sales 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	(313)	(61)
Other financing activities	0	(80)
Net cash used in financing activities	(313)	(141)
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