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COMMITMENTS AND CONTINGENCIES - Aircraft Commitments by Fleet Type (Details) (Details) - Future aircraft purchase commitments	Jun. 30, 2025 aircraft
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	275
A220-300
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	67
A321-200neo
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	79
A330-900neo
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	3
A350-900
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	6
A350-1000
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	20
B-737-10
Future Purchase Commitments
Aircraft purchase commitments, minimum quantity required	100

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482648/440-10-50-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482648/440-10-50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
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-Section 50
-Paragraph 4
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-URI https://asc.fasb.org/1943274/2147482648/440-10-50-4

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The minimum number of units that must be purchased, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes.

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No definition available.

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