XML 172 R88.htm IDEA: XBRL DOCUMENT
v3.22.4

Special Charges (Credits) - Components of Special Charges (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Operating: |  |  |
CARES Act grant | $ 0 | $ (4,021) | $ (3,536)
Severance and benefit costs | 0 | 438 | 575
Impairment of assets | 0 | 97 | 318
(Gains) losses on sale of assets and other special charges | 140 | 119 | 27
Total operating special charges (credits) | 140 | (3,367) | (2,616)
Nonoperating unrealized (gains) losses on investments, net | (20) | 34 | 194
Nonoperating debt extinguishment and modification fees | 7 | 50 | 0
Nonoperating special termination benefits and settlement losses | 0 | 31 | 687
Nonoperating credit loss on BRW Term Loan and related guarantee | 0 | 0 | 697
Total nonoperating special charges and unrealized (gains) losses on investments, net | (13) | 115 | 1,578
Total operating and nonoperating special charges (credits) and unrealized (gains) losses on investments, net | 127 | (3,252) | (1,038)
Income tax expense (benefit), net of valuation allowance | (33) | 728 | 404
Total operating and nonoperating special charges (credits) and unrealized (gains) losses on investments, net of income taxes | $ 94 | $ (2,524) | $ (634)

X
- Definition Debt Extinguishment and Modification Fees, Non-Operating + References No definition available. + Details
Name: | ual_DebtExtinguishmentAndModificationFeesNonOperating
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 Settlement, Restructuring And Special And Contractual Termination Benefits + References No definition available. + Details
Name: | ual_DefinedBenefitPlanNetPeriodicBenefitCostCreditGainLossDueToSettlementRestructuringAndSpecialAndContractualTerminationBenefits
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain (Loss) On Financial Instruments, Non-Operating + References No definition available. + Details
Name: | ual_GainLossOnFinancialInstrumentsNonOperating
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale of other assets and other miscellaneous charges. + References No definition available. + Details
Name: | ual_GainLossOnSaleOfOtherAssetsAndOtherMiscellaneousCharges
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Income tax expense (benefit) special charges. + References No definition available. + Details
Name: | ual_IncomeTaxExpenseBenefitSpecialCharges
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Special Charges And Losses On Financial Instruments, Nonoperating, Before Tax + References No definition available. + Details
Name: | ual_SpecialChargesAndLossesOnFinancialInstrumentsNonOperatingBeforeTax
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Special Charges And Losses On Financial Instruments, Operating And Nonoperating, Before Tax + References No definition available. + Details
Name: | ual_SpecialChargesAndLossesOnFinancialInstrumentsOperatingAndNonoperatingBeforeTax
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total special items in the period. + References No definition available. + Details
Name: | ual_SpecialItemsNetOfIncomeTaxBenefits
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OperatingExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period expense related to postemployment benefits. + References No definition available. + Details
Name: | us-gaap_PostemploymentBenefitsPeriodExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
Name: | us-gaap_RestructuringSettlementAndImpairmentProvisions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233 + Details
Name: | us-gaap_UnusualOrInfrequentItemGainGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration