XML 58 R40.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Hedging Activities - Additional Information (Detail) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 USD ($) gal | Dec. 31, 2015 USD ($)
Derivatives And Hedging Activities [Line Items] |  |
Percentage of projection for hedging financial instruments for the remainder of 2016 | 13.00% |
Volume of fuel hedging for the remainder of 2016 | gal | 126,000,000 |
Fuel hedges expiration date | 2016-12 |
Cash Flow Hedging |  |
Derivatives And Hedging Activities [Line Items] |  |
Percentage of projection of European euro for hedging financial instruments for remainder of 2016 | 16.00% |
Fair value of derivative liability | $ 4 | $ 124
Percentage of projection of Japanese yen for hedging financial instruments for remainder of 2016 | 18.00% |
Foreign Currency Derivatives Liability , Net |  |
Derivatives And Hedging Activities [Line Items] |  |
Fair value of derivative liability | $ 1 |
Fuel Derivative Instruments |  |
Derivatives And Hedging Activities [Line Items] |  |
Fuel hedge collateral deposits |  | $ 26

X
- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash Collateral Posted For Derivatives Liability + References No definition available. + Details
Name: | ual_CashCollateralPostedForDerivativesLiability
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative Instrument Expiry Date + References No definition available. + Details
Name: | ual_DerivativeInstrumentExpiryDate
Namespace Prefix: | ual_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Derivatives And Hedging Activities [Line Items] + References No definition available. + Details
Name: | ual_DerivativesAndHedgingActivitiesLineItems
Namespace Prefix: | ual_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of projected European euro denominated net cash inflows that are hedged with foreign currency derivatives + References No definition available. + Details
Name: | ual_HedgingContractAsPercentageOfProjectedEuropeanEuroNetCashInflow
Namespace Prefix: | ual_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Hedging Contract As Percentage Of Projected Japanese Yen Net Cash Inflow + References No definition available. + Details
Name: | ual_HedgingContractAsPercentageOfProjectedJapaneseYenNetCashInflow
Namespace Prefix: | ual_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=64830801&loc=SL51823488-111719 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage of expected requirements covered by the aggregate notional amount of derivative contracts expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract as a percentage of expected need. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountPercentOfRequiredNeedCoverage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ual_FuelDerivativesInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |