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LEASES - Maturity of Lease Liabilities (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Aircraft Leases [Member] |
Lessee, Lease, Description [Line Items] |
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months | $ 162
Lessee, Operating Lease, Liability, Payments, Due Year Two | 72
Lessee, Operating Lease, Liability, Payments, Due Year Three | 75
Lessee, Operating Lease, Liability, Payments, Due Year Four | 71
Lessee, Operating Lease, Liability, Payments, Due Year Five | 64
Lessee, Operating Lease, Liability, Payments, Due after Year Five | 306
Lessee, Operating Lease, Liability, Payments, Due | 750
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 145
Operating Lease, Liability | 605
CPA Aircraft [Member] |
Lessee, Lease, Description [Line Items] |
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months | 112
Lessee, Operating Lease, Liability, Payments, Due Year Two | 112
Lessee, Operating Lease, Liability, Payments, Due Year Three | 112
Lessee, Operating Lease, Liability, Payments, Due Year Four | 112
Lessee, Operating Lease, Liability, Payments, Due Year Five | 110
Lessee, Operating Lease, Liability, Payments, Due after Year Five | 276
Lessee, Operating Lease, Liability, Payments, Due | 834
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 191
Operating Lease, Liability | 643
Airport Facilities [Member] |
Lessee, Lease, Description [Line Items] |
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months | 5
Lessee, Operating Lease, Liability, Payments, Due Year Two | 6
Lessee, Operating Lease, Liability, Payments, Due Year Three | 6
Lessee, Operating Lease, Liability, Payments, Due Year Four | 5
Lessee, Operating Lease, Liability, Payments, Due Year Five | 5
Lessee, Operating Lease, Liability, Payments, Due after Year Five | 9
Lessee, Operating Lease, Liability, Payments, Due | 36
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 6
Operating Lease, Liability | 30
Corporate real estate [Member] |
Lessee, Lease, Description [Line Items] |
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months | 10
Lessee, Operating Lease, Liability, Payments, Due Year Two | 9
Lessee, Operating Lease, Liability, Payments, Due Year Three | 9
Lessee, Operating Lease, Liability, Payments, Due Year Four | 8
Lessee, Operating Lease, Liability, Payments, Due Year Five | 7
Lessee, Operating Lease, Liability, Payments, Due after Year Five | 112
Lessee, Operating Lease, Liability, Payments, Due | 155
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | 74
Operating Lease, Liability | $ 81

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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Period Type: | duration

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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease due 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/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease 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 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease 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 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease 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 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third 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 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease 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 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-1 + Details
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- Details
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