Subsequent Events - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	Nov. 07, 2020	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Subsequent Event [Line Items]
Common stock, par value				$ 0.1
Preferred Stock, Par or Stated Value Per Share			$ 1.00
Series B Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred Stock, Par or Stated Value Per Share		$ 1.00
Navistar International Corp. [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, par value	$ 0.10
Business Acquisition, Share Price	$ 44.50
Liabilities Subject to Compromise, Early Contract Termination Fees	$ 125
Business Acquisition, Transaction Costs	$ 25
Navistar International Corp. [Member] | Series B Preferred Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 1.00