XML 144 R60.htm IDEA: XBRL DOCUMENT
v3.22.4

Pension and Other Postretirement Plans - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) plan | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Number of defined benefit pension plans | plan |  | 2 |  |
Profit sharing and payroll tax expense |  | $ 133,000,000 | $ 0 | $ 0
Minimum |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Percentage of pre-tax earnings paid for profit sharing plan |  | 5.00% |  |
Maximum |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Percentage of pre-tax earnings paid for profit sharing plan |  | 20.00% |  |
IAM National Pension Plan |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Multi-employer plan contributions |  |  | 507,000,000 |
United Airlines, Inc. |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Expense for defined contribution plans |  | $ 756,000,000 | 651,000,000 | 687,000,000
United Airlines, Inc. | Minimum |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Employer contribution percentage |  | 1.00% |  |
United Airlines, Inc. | Maximum |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Employer contribution percentage |  | 16.00% |  |
Other Postretirement Benefits |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Special termination benefits |  | $ 0 | (31,000,000) | (201,000,000)
Expected employer contributions to pension and postretirement plans |  | 113,000,000 |  |
Pension Benefits |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Special termination benefits |  | $ 0 | 0 | (54,000,000)
Settlement losses |  |  |  | $ (430,000,000)
Employee Separation | Voluntary Separation Leave Programs |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Special termination benefits |  |  | 31,000,000 |
Employee Separation | Voluntary Separation Leave Programs | Full-Time Employees |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Restructuring programs, one-time contribution per employee | $ 125,000 |  | 125,000 |
Employee Separation | Voluntary Separation Leave Programs | Part-Time Employees |  |  |  |
Defined Benefit Plans And Defined Contribution Plans Disclosures [Line Items] |  |  |  |
Restructuring programs, one-time contribution per employee | $ 75,000 |  | $ 75,000 |

X
- Definition Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due To Special And Contractual Termination Benefits + References No definition available. + Details
Name: | ual_DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDueToSpecialAndContractualTerminationBenefits
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Defined Benefit Plan Profit Sharing And Payroll Tax Expense + References No definition available. + Details
Name: | ual_DefinedBenefitPlanProfitSharingAndPayrollTaxExpense
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined Benefit Plans And Defined Contribution Plans Disclosures + References No definition available. + Details
Name: | ual_DefinedBenefitPlansAndDefinedContributionPlansDisclosuresLineItems
Namespace Prefix: | ual_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Defined Benefit Pension Plans + References No definition available. + Details
Name: | ual_NumberOfDefinedBenefitPensionPlans
Namespace Prefix: | ual_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Profit Sharing Plan, Percentage of Pre-Tax Earnings Paid + References No definition available. + Details
Name: | ual_ProfitSharingPlanPercentageOfPreTaxEarningsPaid
Namespace Prefix: | ual_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Restructuring Programs, One-Time Contribution Per Employee + References No definition available. + Details
Name: | ual_RestructuringProgramsOneTimeContributionPerEmployee
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + 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 (g) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + 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 (h)(7) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contribution received by multiemployer pension plan from all employers participating in multiemployer pension plan determined to be individually significant. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 7 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=65877416&loc=SL14450678-114947 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948 + Details
Name: | us-gaap_MultiemployerPlanPensionSignificantPlanContribution
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=ual_InternationalAssociationOfMachinistsNationalPensionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ual_UnitedAirLinesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=ual_VoluntarySeparationLeaveVSLProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ual_EmployeeClassificationAxis=ual_FullTimeEmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ual_EmployeeClassificationAxis=ual_PartTimeEmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |