XML 76 R53.htm IDEA: XBRL DOCUMENT v3.24.2

Special Charges - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Feb. 22, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Special Charges [Line Items]
(Gains) losses on sale of assets and other special charges		$ 36	$ 46	$ 49	$ 60
Nonoperating unrealized (gains) losses		33	(84)	70	(108)
Deferred debt issuance cost, writeoff				35
Labor contract ratification bonuses		0	813	0	813
Nonoperating debt extinguishment and modification fees		$ 0	11	35	11
Prepayment of outstanding principal amount				$ 6,217	2,614
Secured Debt | Term Loan Due 2021
Special Charges [Line Items]
Prepayment of outstanding principal amount	$ 1,370		$ 1,000		$ 1,000

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

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

Labor Contract Ratification Bonus

+ References

No definition available.

+ Details

Name:	ual_LaborContractRatificationBonus
Namespace Prefix:	ual_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Special Charges [Line Items]

+ References

No definition available.

+ Details

Name:	ual_SpecialChargesLineItems
Namespace Prefix:	ual_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=ual_TermLoanDue2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: