Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Disaggregation of Revenue [Line Items]
Sales and revenues, net	$ 2,162	$ 1,925	$ 3,974	$ 3,763
Truck products and services
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	1,243	1,260	2,259	2,338
Truck contract manufacturing
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	97	59	206	156
Used trucks
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	102	42	160	83
Engines
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	173	85	296	182
Parts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	480	405	911	861
Extended warranty contracts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	26	26	58	51
Sales of manufactured products, net
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	2,121	1,877	3,890	3,671
Retail financing
Disaggregation of Revenue [Line Items]
Finance revenues	36	39	73	74
Wholesale financing
Disaggregation of Revenue [Line Items]
Finance revenues	5	9	11	18
Interest income	5	8	11	18
Finance revenues
Disaggregation of Revenue [Line Items]
Finance revenues	41	48	84	92
Truck
Disaggregation of Revenue [Line Items]
Sales and revenues, net	1,466	1,385	2,679	2,623
Truck | Truck products and services
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	1,240	1,257	2,254	2,332
Truck | Truck contract manufacturing
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	97	59	206	156
Truck | Used trucks
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	102	42	160	83
Truck | Engines
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Truck | Parts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	1	1	1	1
Truck | Extended warranty contracts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	26	26	58	51
Truck | Sales of manufactured products, net
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	1,466	1,385	2,679	2,623
Truck | Retail financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Truck | Wholesale financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Truck | Finance revenues
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Parts
Disaggregation of Revenue [Line Items]
Sales and revenues, net	523	442	988	934
Parts | Truck products and services
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Parts | Truck contract manufacturing
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Parts | Used trucks
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Parts | Engines
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	59	49	109	99
Parts | Parts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	464	393	879	835
Parts | Extended warranty contracts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Parts | Sales of manufactured products, net
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	523	442	988	934
Parts | Retail financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Parts | Wholesale financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Parts | Finance revenues
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Global Operations
Disaggregation of Revenue [Line Items]
Sales and revenues, net	129	47	218	108
Global Operations | Truck products and services
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Global Operations | Truck contract manufacturing
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Global Operations | Used trucks
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Global Operations | Engines
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	114	36	187	83
Global Operations | Parts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	15	11	31	25
Global Operations | Extended warranty contracts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Global Operations | Sales of manufactured products, net
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	129	47	218	108
Global Operations | Retail financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Global Operations | Wholesale financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Global Operations | Finance revenues
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Financial Services
Disaggregation of Revenue [Line Items]
Finance revenues	43	50	88	96
Sales and revenues, net	43	50	88	96
Financial Services | Truck products and services
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Truck contract manufacturing
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Used trucks
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Engines
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Parts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Extended warranty contracts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Sales of manufactured products, net
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Financial Services | Retail financing
Disaggregation of Revenue [Line Items]
Finance revenues	38	41	77	78
Interest income	15	17	29	32
Financial Services | Wholesale financing
Disaggregation of Revenue [Line Items]
Finance revenues	5	9	11	18
Financial Services | Finance revenues
Disaggregation of Revenue [Line Items]
Finance revenues	43	50	88	96
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Sales and revenues, net	1	1	1	2
Corporate and Eliminations | Truck products and services
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	3	3	5	6
Corporate and Eliminations | Truck contract manufacturing
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Corporate and Eliminations | Used trucks
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Corporate and Eliminations | Engines
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Corporate and Eliminations | Parts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Corporate and Eliminations | Extended warranty contracts
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	0	0	0	0
Corporate and Eliminations | Sales of manufactured products, net
Disaggregation of Revenue [Line Items]
Sales of manufactured products, net	3	3	5	6
Corporate and Eliminations | Retail financing
Disaggregation of Revenue [Line Items]
Finance revenues	(2)	(2)	(4)	(4)
Corporate and Eliminations | Wholesale financing
Disaggregation of Revenue [Line Items]
Finance revenues	0	0	0	0
Corporate and Eliminations | Finance revenues
Disaggregation of Revenue [Line Items]
Finance revenues	$ (2)	$ (2)	$ (4)	$ (4)