XML 38 R45.htm IDEA: XBRL DOCUMENT
v3.19.3

BRW Term Loan (Details) - USD ($) shares in Millions, $ in Millions | Sep. 30, 2019 | Nov. 30, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying amount of loan receivable | $ 494 |
BRW |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loan amount |  | $ 456
Number of shares pledged as collateral (in shares) |  | 516.0
Implied value equivalent of shares pledged as collateral (in ADRs) |  | 64.5

X
- Definition Loans Receivable, Agreement, Shares Pledged As Collateral + References No definition available. + Details
Name: | ual_LoansReceivableAgreementSharesPledgedAsCollateral
Namespace Prefix: | ual_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loans Receivable, Agreement, Shares Pledged As Collateral, American Depository Receipts + References No definition available. + Details
Name: | ual_LoansReceivableAgreementSharesPledgedAsCollateralImpliedValueEquivalentAmericanDepositoryReceipts
Namespace Prefix: | ual_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loans Receivable, Principal Amount + References No definition available. + Details
Name: | ual_LoansReceivablePrincipalAmount
Namespace Prefix: | ual_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_CounterpartyNameAxis=ual_BRWAviationHoldingLLCAndBRWAviationLLCBRWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |