Stockholders' Deficit - Rollforward of Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Apr. 30, 2014	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2016
Class of Stock [Line Items]
Preferred Stock, Shares Authorized			30,000,000
Preference Stock		$ 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		99,200,000	98,900,000	98,500,000
Shares issued (in shares)		600,000	500,000		500,000
Shares acquired (in shares)		(200,000)	(200,000)		(100,000)
Ending balance (in shares)		99,600,000	99,200,000	98,900,000
Series D Convertible Junior Preference Stock		70,182
Optional redemption price		$ 25
Debt Instrument, Unamortized Discount		$ 43
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		103,100,000	103,100,000	103,100,000
Shares issued (in shares)		0	0	0
Shares acquired (in shares)		0	0	0
Ending balance (in shares)		103,100,000	103,100,000	103,100,000
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		3,900,000	4,200,000	4,600,000
Shares issued (in shares)		(600,000)	(500,000)	(500,000)
Shares acquired (in shares)		(200,000)	(200,000)	(100,000)
Ending balance (in shares)		3,500,000	3,900,000	4,200,000
Manufacturing Operations [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Debt Instrument, Unamortized Discount		$ 39
Four Point Five Zero Senior Subordinated Convertible Notes [Member] | Manufacturing Operations [Member] | Convertible Subordinated Debt [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Long-term Debt, Fair Value	$ 177
Debt Instrument, Unamortized Discount			$ 0	$ 5
Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] | Convertible Subordinated Debt [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Debt Instrument, Unamortized Discount			1
Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] | Manufacturing Operations [Member] | Convertible Subordinated Debt [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Long-term Debt, Fair Value	367
Debt Instrument, Convertible, Carrying Amount of Equity Component	22		44
Debt Instrument, Unamortized Discount			$ 5	$ 14
Additional Paid-in Capital | Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] | Manufacturing Operations [Member] | Convertible Subordinated Debt [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Debt Related Commitment Fees and Debt Issuance Costs	$ 1