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v3.20.4

Post Retirement Benefits (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Postretirement benefits: |  |  |  |
Defined Benefit Plan, Changes in Benefit Obligation and Plan Assets, Description |  | In August 2010, as part of a new collective-bargaining agreement, the post retirement health and life insurance benefits for all current and future represented employees who were not retired were eliminated in exchange for a one-time cash payment. Individuals who retired prior to August 2010 remain eligible for post retirement health and life insurance benefits. |  |
Defined Benefit Plan, Plan Name [Extensible Enumeration] |  | cmt:NavistarsPostRetirementHealthAndLifeInsuranceBenefitPlanMember |  |
Defined Benefit Plan, Type [Extensible Enumeration] |  | Post retirement health and life insurance benefit plan |  |
Defined Benefit Plan, Sponsor Location [Extensible Enumeration] |  |  | us-gaap:DomesticPlanMember |
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment |  | $ (10,282,000) |  |
Amortization of prior service costs |  | 496,000 | $ 496,000 | $ 496,000
Actuarial gain (loss) |  | 945,000 | 1,956,000 |
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year: |  |  |  |
Interest cost |  | 235,000 | 285,000 | $ 277,000
Post retirement health and life insurance benefit plan |  |  |  |
Postretirement benefits: |  |  |  |
Unrecognized loss (gain) |  | (102,000) | 1,099,000 |
Actuarial gain (loss) |  | $ (1,047,000) | (857,000) |
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Accumulated Other Comprehensive Income (Loss), Net of Tax |  |
Amounts that will be amortized from accumulated other comprehensive income in next fiscal year: |  |  |  |
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year |  | $ (1,763,000) | (1,976,000) |
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year |  | 496,000 | 173,000 |
Interest cost |  | 237,000 | 285,000 |
Defined Benefit Plan, Expected Amortization, Next Fiscal Year |  | $ 161,000 | $ 162,000 |
Assumed health care cost trend rates: |  |  |  |
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year |  | 5.10% | 6.00% |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate |  |  | 5.00% |
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate |  | 2027 |  |
Post retirement health and life insurance benefit plan | Medical pre age 65 |  |  |  |
Assumed health care cost trend rates: |  |  |  |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate |  | 5.00% |  |
Post retirement health and life insurance benefit plan | Medical post age 65 |  |  |  |
Assumed health care cost trend rates: |  |  |  |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate |  | 4.25% |  |
Post retirement health and life insurance benefit plan | Drugs - all ages |  |  |  |
Assumed health care cost trend rates: |  |  |  |
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate |  | 5.00% |  |
Scenario plan |  |  |  |
Postretirement benefits: |  |  |  |
Amortization of prior service costs | $ 496,000 |  |  |

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Indicates name of defined benefit plan designed to provide retirement benefits. 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