XML 61 R40.htm IDEA: XBRL DOCUMENT
v3.20.2

Employee Benefit Plans - Narrative (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Employee Benefit Plans [Line Items] |  |  |  |
Number of days used to compute performance period average closing price of restricted stock units |  |  | 20 days |
RSUs |  |  |  |
Employee Benefit Plans [Line Items] |  |  |  |
Awards granted (in shares) |  |  | 2.4 |
Vesting period |  |  | 3 years |
Time-Vested RSUs |  |  |  |
Employee Benefit Plans [Line Items] |  |  |  |
Awards granted (in shares) |  |  | 2.1 |
Performance-Based RSUs |  |  |  |
Employee Benefit Plans [Line Items] |  |  |  |
Awards granted (in shares) |  |  | 0.3 |
Pension Benefits |  |  |  |
Employee Benefit Plans [Line Items] |  |  |  |
Special termination benefit | $ (35) | $ 0 | $ (35) | $ 0
Settlement loss for VSPs | $ (71) | 0 | $ (71) | 0
Discount rate | 3.24% |  | 3.24% |
Increase (decrease) in the projected benefit obligation |  |  | $ 655 |
Other Postretirement Benefits |  |  |  |
Employee Benefit Plans [Line Items] |  |  |  |
Special termination benefit | $ (125) | 0 | (125) | 0
Settlement loss for VSPs | $ 0 | $ 0 | $ 0 | $ 0
Discount rate | 2.73% |  | 2.73% |
Increase (decrease) in the projected benefit obligation |  |  | $ 65 |

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

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 The time period over which the stock closing prices are averaged to arrive at a per-share valuation for equity based awards such as Restricted Stock Units, Performance Share and other equity based awards. + References No definition available. + Details
Name: | ual_DeterminationPeriodAverageClosingPrice
Namespace Prefix: | ual_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Employee Benefit Plans [Table] + References No definition available. + Details
Name: | ual_EmployeeBenefitPlansLineItems
Namespace Prefix: | ual_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=ual_TimeVestedRestrictedStockUnitsRSUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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