Summary of Significant Accounting Policies (Tables)

12 Months Ended

Oct. 31, 2019

Accounting Policies [Abstract]

Schedule of Truck Reserve

Property, Plant And Equipment, Useful Life

The ranges of estimated useful lives are as follows:

	Years
Buildings	20 - 50
Leasehold improvements	3 - 20
Machinery and equipment	3 - 12
Furniture, fixtures, and equipment	3 - 15
Equipment leased to others	1 - 10

Intangible Assets, Useful Life

The ranges for the amortization periods are generally as follows:

	Years
Customer base and relationships	3 - 15
Trademarks	20
Other	3 - 18

Schedule of Product Warranty Liability [Table Text Block]

Product Warranty Liability

The following table presents accrued product warranty and deferred warranty revenue activity:

	For the Years Ended October 31,
(in millions)	2019			2018			2017
Balance at beginning of period	$	529		$	629		$	818
Costs accrued and revenues deferred	249			211			199
Currency translation adjustment	—			1			(1		)
Adjustments to pre-existing warranties(A)	3			(9		)	(1		)
Payments and revenues recognized	(283		)	(303		)	(386		)
Other adjustments(B)	12			—			—
Balance at end of period	510			529			629
Less: Current portion	233			255			307
Noncurrent accrued product warranty and deferred warranty revenue	$	277		$	274		$	322

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(A) Adjustments to pre-existing warranties reflect changes in our estimate of warranty costs for products sold in prior fiscal periods. Such adjustments typically occur when claims experience deviates from historic and expected trends. Our warranty liability is generally affected by component failure rates, repair costs, and the timing of failures. Future events and circumstances related to these factors could materially change our estimates and require adjustments to our liability. In addition, new product launches require a greater use of judgment in developing estimates until historical experience becomes available.

(B) Other adjustments include a $14 million increase in revenues deferred in connection with the adoption of the new revenue standard (as defined below regarding Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") 606), partially offset by a $2 million reduction in liability related to the sale of a majority interest in our defense business, Navistar Defense.