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COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) aircraft
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 204
Finance leased asset, Number of units | aircraft | 1
Firm aircraft commitment [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 89
Aircraft option and other rights [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 115
Minimum [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | $ 10
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 10
Maximum [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 160
Loss Contingency, Range of Possible Loss, Portion Not Accrued | 160
Virgin Group trademark license agreement |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Loss Contingency, Damages Sought, Value | 8
Loss Contingency, Damages Sought, Value | 8
Aircraft Commitments [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2024 | 1,252
2025 | 1,366
2026 | 1,097
2027 | 600
2028 | 151
Thereafter | 716
Total | 5,182
Capacity Purchase Agreements[Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
2024 | 235
2025 | 230
2026 | 224
2027 | 220
2028 | 223
Thereafter | 515
Total | $ 1,647
B737 MAX [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 185
B737 MAX [Member] | Firm aircraft commitment [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 80
B737 MAX [Member] | Aircraft option and other rights [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 105
A321neo [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Number of Aircraft Operated | aircraft | 10
E175 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 19
E175 [Member] | Firm aircraft commitment [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 9
E175 [Member] | Aircraft option and other rights [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Commited to purchase (in aircraft) | aircraft | 10
Property Subject to Operating Lease [Member] | B737-800 |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Operating leases, number of leased assets (in aircraft) | aircraft | 10
Property Subject to Operating Lease [Member] | B737 MAX [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Operating leases, number of leased assets (in aircraft) | aircraft | 14
Property Subject to Operating Lease [Member] | E175 [Member] |
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] |
Operating leases, number of leased assets (in aircraft) | aircraft | 42

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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: 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 + Details
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: 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 + Details
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: 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 + Details
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: 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 + Details
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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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