Fair Value Measurements - Carrying Values and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Millions	Apr. 30, 2021	Apr. 26, 2021	Oct. 31, 2020
Estimated Fair Value
Assets
Retail notes	$ 237		$ 223
Carrying Value
Assets
Retail notes	232		222
Level 1 \| Estimated Fair Value
Assets
Retail notes	0		0
Level 2 \| Estimated Fair Value
Assets
Retail notes	0		0
Level 3 \| Estimated Fair Value
Assets
Retail notes	237		223
Manufacturing operations
Liabilities
Non-financial instrument debt	36		45
Term Loan \| Manufacturing operations \| Estimated Fair Value
Liabilities
Debt:	1,546		1,538
Term Loan \| Manufacturing operations \| Carrying Value
Liabilities
Debt:	1,537		1,543
Term Loan \| Manufacturing operations \| Level 1 \| Estimated Fair Value
Liabilities
Debt:	0		0
Term Loan \| Manufacturing operations \| Level 2 \| Estimated Fair Value
Liabilities
Debt:	0		0
Term Loan \| Manufacturing operations \| Level 3 \| Estimated Fair Value
Liabilities
Debt:	$ 1,546		$ 1,538
Senior Notes \| 9.5% Senior Secured Notes, due 2025
Liabilities
Interest rate	9.50%
Senior Notes \| 6.625% Senior Notes, due 2026
Liabilities
Interest rate	6.625%
Senior Notes \| Manufacturing operations \| 9.5% Senior Secured Notes, due 2025
Liabilities
Interest rate	9.50%	9.50%	9.50%
Senior Notes \| Manufacturing operations \| 6.625% Senior Notes, due 2026
Liabilities
Interest rate	6.625%		6.625%
Senior Notes \| Manufacturing operations \| Estimated Fair Value \| 9.5% Senior Secured Notes, due 2025
Liabilities
Debt:	$ 649		$ 665
Senior Notes \| Manufacturing operations \| Estimated Fair Value \| 6.625% Senior Notes, due 2026
Liabilities
Debt:	1,133		1,137
Senior Notes \| Manufacturing operations \| Carrying Value \| 9.5% Senior Secured Notes, due 2025
Liabilities
Debt:	590		589
Senior Notes \| Manufacturing operations \| Carrying Value \| 6.625% Senior Notes, due 2026
Liabilities
Debt:	1,088		1,087
Senior Notes \| Manufacturing operations \| Level 1 \| Estimated Fair Value \| 9.5% Senior Secured Notes, due 2025
Liabilities
Debt:	0		0
Senior Notes \| Manufacturing operations \| Level 1 \| Estimated Fair Value \| 6.625% Senior Notes, due 2026
Liabilities
Debt:	0		0
Senior Notes \| Manufacturing operations \| Level 2 \| Estimated Fair Value \| 9.5% Senior Secured Notes, due 2025
Liabilities
Debt:	649		665
Senior Notes \| Manufacturing operations \| Level 2 \| Estimated Fair Value \| 6.625% Senior Notes, due 2026
Liabilities
Debt:	1,133		1,137
Senior Notes \| Manufacturing operations \| Level 3 \| Estimated Fair Value \| 9.5% Senior Secured Notes, due 2025
Liabilities
Debt:	0		0
Senior Notes \| Manufacturing operations \| Level 3 \| Estimated Fair Value \| 6.625% Senior Notes, due 2026
Liabilities
Debt:	$ 0		$ 0
Tax Exempt Bond \| 4.75% Notes
Liabilities
Interest rate	4.75%
Tax Exempt Bond \| Manufacturing operations \| 4.75% Notes
Liabilities
Interest rate	4.75%		4.75%
Tax Exempt Bond \| Manufacturing operations \| Estimated Fair Value \| 4.75% Notes
Liabilities
Debt:	$ 238		$ 227
Tax Exempt Bond \| Manufacturing operations \| Carrying Value \| 4.75% Notes
Liabilities
Debt:	223		223
Tax Exempt Bond \| Manufacturing operations \| Level 1 \| Estimated Fair Value \| 4.75% Notes
Liabilities
Debt:	0		0
Tax Exempt Bond \| Manufacturing operations \| Level 2 \| Estimated Fair Value \| 4.75% Notes
Liabilities
Debt:	238		227
Tax Exempt Bond \| Manufacturing operations \| Level 3 \| Estimated Fair Value \| 4.75% Notes
Liabilities
Debt:	0		0
Financed lease obligations \| Manufacturing operations \| Estimated Fair Value
Liabilities
Debt:	37		46
Financed lease obligations \| Manufacturing operations \| Carrying Value
Liabilities
Debt:	36		45
Financed lease obligations \| Manufacturing operations \| Level 1 \| Estimated Fair Value
Liabilities
Debt:	0		0
Financed lease obligations \| Manufacturing operations \| Level 2 \| Estimated Fair Value
Liabilities
Debt:	0		0
Financed lease obligations \| Manufacturing operations \| Level 3 \| Estimated Fair Value
Liabilities
Debt:	37		46
Other \| Manufacturing operations \| Estimated Fair Value
Liabilities
Debt:	5		7
Other \| Manufacturing operations \| Carrying Value
Liabilities
Debt:	5		7
Non-financial instrument debt	1		2
Other \| Manufacturing operations \| Level 1 \| Estimated Fair Value
Liabilities
Debt:	0		0
Other \| Manufacturing operations \| Level 2 \| Estimated Fair Value
Liabilities
Debt:	0		0
Other \| Manufacturing operations \| Level 3 \| Estimated Fair Value
Liabilities
Debt:	5		7
Secured Debt \| Financial Services \| Estimated Fair Value
Liabilities
Debt:	969		726
Secured Debt \| Financial Services \| Carrying Value
Liabilities
Debt:	967		724
Secured Debt \| Financial Services \| Level 1 \| Estimated Fair Value
Liabilities
Debt:	0		0
Secured Debt \| Financial Services \| Level 2 \| Estimated Fair Value
Liabilities
Debt:	0		0
Secured Debt \| Financial Services \| Level 3 \| Estimated Fair Value
Liabilities
Debt:	969		726
Line of Credit \| Financial Services \| Estimated Fair Value
Liabilities
Debt:	822		914
Line of Credit \| Financial Services \| Carrying Value
Liabilities
Debt:	836		940
Line of Credit \| Financial Services \| Level 1 \| Estimated Fair Value
Liabilities
Debt:	0		0
Line of Credit \| Financial Services \| Level 2 \| Estimated Fair Value
Liabilities
Debt:	0		0
Line of Credit \| Financial Services \| Level 3 \| Estimated Fair Value
Liabilities
Debt:	822		914
Commercial Paper \| Financial Services \| Estimated Fair Value \| Variable Rate Program Due 2022
Liabilities
Debt:	15
Commercial Paper \| Financial Services \| Carrying Value \| Variable Rate Program Due 2022
Liabilities
Debt:	15
Commercial Paper \| Financial Services \| Level 1 \| Estimated Fair Value \| Variable Rate Program Due 2022
Liabilities
Debt:	15
Commercial Paper \| Financial Services \| Level 2 \| Estimated Fair Value \| Variable Rate Program Due 2022
Liabilities
Debt:	0
Commercial Paper \| Financial Services \| Level 3 \| Estimated Fair Value \| Variable Rate Program Due 2022
Liabilities
Debt:	0
Borrowings Secured By Operating and Finance Leases \| Financial Services \| Estimated Fair Value
Liabilities
Debt:	171		171
Borrowings Secured By Operating and Finance Leases \| Financial Services \| Carrying Value
Liabilities
Debt:	169		170
Borrowings Secured By Operating and Finance Leases \| Financial Services \| Level 1 \| Estimated Fair Value
Liabilities
Debt:	0		0
Borrowings Secured By Operating and Finance Leases \| Financial Services \| Level 2 \| Estimated Fair Value
Liabilities
Debt:	0		0
Borrowings Secured By Operating and Finance Leases \| Financial Services \| Level 3 \| Estimated Fair Value
Liabilities
Debt:	$ 171		$ 171

NAVISTAR INTERNATIONAL CORP 10-Q