Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Series D Convertible Junior Preference Stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	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, 2019	$ (3,723)		$ 2	$ 10	$ 2,730	$ (4,409)		$ (1,912)	$ (147)	$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(32)					(36)				4
Total other comprehensive income (loss)	17							17
Reclassification of stranded tax effects	0					189		(189)
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)	(65)
Total other comprehensive income (loss)	(62)
Reclassification of stranded tax effects	(189)					189
Stockholders' equity balance at end of period at Apr. 30, 2020	(3,856)		2	10	2,725	(4,296)		(2,163)	(136)	2
Stockholders' equity balance at beginning of period at Oct. 31, 2019	(3,723)		2	10	2,730	(4,409)		(1,912)	(147)	3
Stockholders' equity balance at end of period at Oct. 31, 2020	$ (3,822)	$ (7)	2	10	2,726	(4,566)	$ (7)	(1,865)	(133)	4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption of new credit loss standard	Accounting Standards Update 2016-13
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 (loss)	(79)							(79)
Stock-based compensation	1				1
Stock ownership programs	(1)				(6)	(2)			7
Cash dividends paid to non-controlling interest	(5)									(5)
Stockholders' equity balance at end of period at Apr. 30, 2020	(3,856)		2	10	2,725	(4,296)		(2,163)	(136)	2
Stockholders' equity balance at beginning of period at Oct. 31, 2020	(3,822)	(7)	2	10	2,726	(4,566)	(7)	(1,865)	(133)	4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(77)					(81)				4
Total other comprehensive income (loss)	79							79
Stock-based compensation	1				1
Stock ownership programs	1								1
Stockholders' equity balance at end of period at Jan. 31, 2021	(3,825)		2	10	2,727	(4,654)		(1,786)	(132)	8
Stockholders' equity balance at beginning of period at Oct. 31, 2020	(3,822)	$ (7)	2	10	2,726	(4,566)	$ (7)	(1,865)	(133)	4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	91
Total other comprehensive income (loss)	107
Stockholders' equity balance at end of period at Apr. 30, 2021	(3,640)		2	10	2,721	(4,491)		(1,758)	(127)	3
Stockholders' equity balance at beginning of period at Jan. 31, 2021	(3,825)		2	10	2,727	(4,654)		(1,786)	(132)	8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	168					163				5
Total other comprehensive income (loss)	28							28
Stock ownership programs	(1)				(6)				5
Cash dividends paid to non-controlling interest	(10)									(10)
Stockholders' equity balance at end of period at Apr. 30, 2021	$ (3,640)		$ 2	$ 10	$ 2,721	$ (4,491)		$ (1,758)	$ (127)	$ 3