Label	Element	Value
Secured by aircraft [Member] \| Subsequent Event [Member]
Subsequent Events [Text Block]	us-gaap_SubsequentEventsTextBlock	Subsequent to quarter end, the Company executed an amendment to one of its aircraft-backed credit facilities, extending the term of the agreement from June 2024 to June 2026 and increasing the size of the facility from $250 million to $400 million. There were no changes to the minimum unrestricted cash and marketable securities requirement.
Variable rate notes payable due through 2029 [Member] [Member] \| Subsequent Event [Member]
Subsequent Events [Text Block]	us-gaap_SubsequentEventsTextBlock	Subsequent to quarter end, Alaska completed a refinancing of an existing 2018 variable-rate loan facility with a total commitment amount of $117 million. The facility is secured by B737 aircraft.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

Name:	us-gaap_SubsequentEventsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration