Commitments and Contingencies - Flight Equipment Commitments (Details) $ in Millions	Jun. 30, 2023 USD ($) aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Remainder of 2023 \| $	$ 1,270
2024 \| $	2,189
2025 \| $	1,701
2026 \| $	1,334
2027 \| $	987
Total \| $	$ 7,481
Remainder of 2023	24
2024	43
2025	35
2026	26
2027	14
Total	142
Number of aircrafts delivered	6
Airbus A321neo
Unrecorded Unconditional Purchase Obligation [Line Items]
Remainder of 2023	9
2024	13
2025	11
2026	12
2027	14
Total	59
Number of aircrafts for the remainder of 2023	4,000
Airbus A220
Unrecorded Unconditional Purchase Obligation [Line Items]
Remainder of 2023	15
2024	30
2025	24
2026	14
2027	0
Total	83
Number of aircrafts for the remainder of 2023	11,000
Number of available aircraft	20
A321 neo LR
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircrafts for the remainder of 2023	4,000

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Unrecorded Unconditional Purchase Obligations, Year Four

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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 (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482648/440-10-50-4

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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in remainder of current fiscal year.

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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 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
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482648/440-10-50-4

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