Consolidated Statements of Stockholders' Deficit - USD ($) $ in Millions	Total	Series D Convertible Junior Preference Stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Common Stock Held in Treasury, at cost	Stockholders' Equity Attributable to Non-controlling Interests
Stockholders' Equity balance at beginning of period at Oct. 31, 2018	$ (3,926)	$ 2	$ 10	$ 2,731	$ (4,593)	$ (1,920)	$ (161)	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	17				11			6
Total other comprehensive income	129					129
Stock-based compensation	2			2
Stock ownership programs	0			(1)			1
Cash dividends paid to non-controlling interest	(8)							(8)
Stockholders' Equity balance at end of period at Jan. 31, 2019	(3,813)	2	10	2,732	(4,609)	(1,791)	(160)	3
Stockholders' Equity balance at beginning of period at Oct. 31, 2018	(3,926)	2	10	2,731	(4,593)	(1,920)	(161)	5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	135
Net Income (Loss) Attributable to Noncontrolling Interest	16
Total other comprehensive income	166
Stockholders' Equity balance at end of period at Jul. 31, 2019	(3,660)	2	10	2,730	(4,501)	(1,754)	(150)	3
Stockholders' Equity balance at beginning of period at Jan. 31, 2019	(3,813)	2	10	2,732	(4,609)	(1,791)	(160)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(43)				(48)
Net Income (Loss) Attributable to Noncontrolling Interest								5
Total other comprehensive income	5					5
Stock-based compensation	5			5
Stock ownership programs	(1)			(9)			8
Cash dividends paid to non-controlling interest	(5)							(5)
Stockholders' Equity balance at end of period at Apr. 30, 2019	(3,852)	2	10	2,728	(4,657)	(1,786)	(152)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	161				156
Net Income (Loss) Attributable to Noncontrolling Interest								5
Total other comprehensive income	32					32
Stock-based compensation	2			2
Stock ownership programs	2						2
Cash dividends paid to non-controlling interest	(5)							(5)
Stockholders' Equity balance at end of period at Jul. 31, 2019	(3,660)	2	10	2,730	(4,501)	(1,754)	(150)	3
Stockholders' Equity balance at beginning of period at Oct. 31, 2019	(3,723)	2	10	2,730	(4,409)	(1,912)	(147)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(32)
Total other comprehensive income	17					17
Stock-based compensation	2			2
Stock ownership programs	2			(2)			4
Cash dividends paid to non-controlling interest	(5)							(5)
Stockholders' Equity balance at end of period at Jan. 31, 2020	(3,739)	2	10	2,730	(4,256)	(2,084)	(143)	2
Stockholders' Equity balance at beginning of period at Oct. 31, 2019	(3,723)	2	10	2,730	(4,409)	(1,912)	(147)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(99)
Net Income (Loss) Attributable to Noncontrolling Interest	12
Total other comprehensive income	1
Stockholders' Equity balance at end of period at Jul. 31, 2020	(3,828)	2	10	2,726	(4,333)	(2,100)	(135)	2
Stockholders' Equity balance at beginning of period at Jan. 31, 2020	(3,739)	2	10	2,730	(4,256)	(2,084)	(143)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(33)				(38)			5
Total other comprehensive income	(79)					(79)
Stock-based compensation	1			1
Stock ownership programs	(1)			(6)	(2)		7
Cash dividends paid to non-controlling interest								(5)
Stockholders' Equity balance at end of period at Apr. 30, 2020	(3,856)	2	10	2,725	(4,296)	(2,163)	(136)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(34)				(37)
Net Income (Loss) Attributable to Noncontrolling Interest	3
Total other comprehensive income	63
Cash dividends paid to non-controlling interest								(3)
Stockholders' Equity balance at end of period at Jul. 31, 2020	$ (3,828)	$ 2	$ 10	$ 2,726	$ (4,333)	$ (2,100)	$ (135)	$ 2