Selected Quarterly Financial Data (unaudited) - Schedule of Selected Quarterly Data (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Sales and revenues, net	$ 2,065	$ 1,675	$ 1,925	$ 1,838	$ 2,780	$ 3,042	$ 2,996	$ 2,433	$ 7,503	$ 11,251	$ 10,250
Gross Profit	345	251	253	265	459	495	455	407
Total before tax									(329)	243	368
Income from continuing operations, net of tax									(347)	221	340
Net income (loss)	$ (236)	$ (37)	$ (38)	$ (36)	$ 102	$ 156	$ (48)	$ 11	$ (329)	$ 243	$ 368
Basic: Loss from Continuing Operations (in dollars per share)	$ (2.36)	$ (0.37)	$ (0.38)	$ (0.36)	$ 1.03	$ 1.57	$ (0.48)	$ 0.11
Basic (in dollars per share)									$ (3.48)	$ 2.23	$ 3.44
Diluted: Loss from Continuing Operations (in dollars per share)	$ (2.36)	$ (0.37)	$ (0.38)	$ (0.36)	$ 1.02	$ 1.56	$ (0.48)	$ 0.11
Diluted (in dollars per share)									$ (3.48)	$ 2.22	$ 3.41
Basic (in shares)									99.7	99.3	98.9
Diluted (in shares)									99.7	99.5	99.6
Asset impairment charges									$ 28	$ 7	$ 14
Goodwill	$ 38				$ 38				$ 38	$ 38