Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015
Net cash provided by (used in) operations	$ (14)	$ (14)
Net change in restricted cash and cash equivalents	(64)	(192)
Net sales (purchases) of marketable securities	19	312
Capital expenditures and purchase of equipment leased to others	(177)	(130)
Other investing activities	55	15
Net cash provided by (used in) investing activities	(167)	5
Net borrowings (repayments) of debt	(207)	113
Other financing activities	(10)	(27)
Net cash provided by (used in) financing activities	(217)	86
Effect of exchange rate changes on cash and cash equivalents	33	(27)
Increase (decrease) in cash and cash equivalents	(365)	50
Cash and cash equivalents at beginning of the period	912	497
Cash and cash equivalents at end of the period	547	547
Parent Company [Member]
Net cash provided by (used in) operations	(372)	(106)
Net change in restricted cash and cash equivalents	0	1
Net sales (purchases) of marketable securities	113	230
Capital expenditures and purchase of equipment leased to others	0	0
Other investing activities	0	0
Net cash provided by (used in) investing activities	113	231
Net borrowings (repayments) of debt	0	0
Other financing activities	0	0
Net cash provided by (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	(259)	125
Cash and cash equivalents at beginning of the period	456	101
Cash and cash equivalents at end of the period	197	226
Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	(225)	282
Net change in restricted cash and cash equivalents	4	1
Net sales (purchases) of marketable securities	0	0
Capital expenditures and purchase of equipment leased to others	(56)	(52)
Other investing activities	0	3
Net cash provided by (used in) investing activities	(52)	(48)
Net borrowings (repayments) of debt	263	(189)
Other financing activities	18	(54)
Net cash provided by (used in) financing activities	281	(243)
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	4	(9)
Cash and cash equivalents at beginning of the period	81	53
Cash and cash equivalents at end of the period	85	44
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operations	344	62
Net change in restricted cash and cash equivalents	(68)	(194)
Net sales (purchases) of marketable securities	(94)	82
Capital expenditures and purchase of equipment leased to others	(121)	(78)
Other investing activities	55	12
Net cash provided by (used in) investing activities	(228)	(178)
Net borrowings (repayments) of debt	(151)	176
Other financing activities	(108)	(99)
Net cash provided by (used in) financing activities	(259)	77
Effect of exchange rate changes on cash and cash equivalents	33	(27)
Increase (decrease) in cash and cash equivalents	(110)	(66)
Cash and cash equivalents at beginning of the period	375	343
Cash and cash equivalents at end of the period	265	277
Consolidation, Eliminations [Member]
Net cash provided by (used in) operations	239	(252)
Net change in restricted cash and cash equivalents	0	0
Net sales (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	(319)	126
Other financing activities	80	126
Net cash provided by (used in) financing activities	(239)	252
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