Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Comprehsive Income (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Apr. 30, 2016	Jul. 31, 2017	Jul. 31, 2016
Net income (loss)	$ 42	$ (28)		$ (87)	$ (39)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Foreign currency translation adjustment	42	(10)		34	7
Defined benefit plans (net of tax of $0, for all entities)	(125)	(34)		(194)	(82)
Other Comprehensive Income (Loss), Net of Tax	167	24	$ 24	228	89
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	209	(4)		141	50
Net Income (Loss) Attributable to Noncontrolling Interest	5	6		18	24
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	204	(10)		123	26
Parent Company [Member]
Net income (loss)	37	(34)		(105)	(63)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Foreign currency translation adjustment	42	(10)		34	7
Defined benefit plans (net of tax of $0, for all entities)	(125)	(34)		(194)	(82)
Other Comprehensive Income (Loss), Net of Tax	167	24		228	89
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	204	(10)		123	26
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	204	(10)		123	26
Guarantor Subsidiaries [Member]
Net income (loss)	0	1		(109)	(93)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Foreign currency translation adjustment	0	0		0	0
Defined benefit plans (net of tax of $0, for all entities)	(126)	(33)		(192)	(96)
Other Comprehensive Income (Loss), Net of Tax	126	33		192	96
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	126	34		83	3
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	126	34		83	3
Non-Guarantor Subsidiaries [Member]
Net income (loss)	141	55		240	245
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Foreign currency translation adjustment	42	(10)		34	7
Defined benefit plans (net of tax of $0, for all entities)	(35)	(1)		(38)	14
Other Comprehensive Income (Loss), Net of Tax	77	(9)		72	(7)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	218	46		312	238
Net Income (Loss) Attributable to Noncontrolling Interest	5	6		18	24
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	213	40		294	214
Consolidation, Eliminations [Member]
Net income (loss)	(136)	(50)		(113)	(128)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Foreign currency translation adjustment	(42)	10		(34)	(7)
Defined benefit plans (net of tax of $0, for all entities)	161	34		230	82
Other Comprehensive Income (Loss), Net of Tax	(203)	(24)		(264)	(89)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(339)	(74)		(377)	(217)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0		0	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (339)	$ (74)		$ (377)	$ (217)