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v3.19.3.a.u2

Debt - Narrative (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | May 31, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |
Long term debt | $ 14,733,000,000 |  | $ 13,636,000,000
Pass-Through Certificates |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 9,600,000,000 |  |
4.875% Senior Notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Fixed interest rate | 4.25% |  |
Line of Credit | Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount | $ 1,500,000,000 |  |
Quarterly principal repayment amount | 0.25% |  |
Line of Credit | Term Loan | LIBOR |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 1.75% |  |
Line of Credit | Term Loan | Alternative Rate Based on Certain Market Interest Rates |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 0.75% |  |
Line of Credit | Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Credit agreement | $ 2,000,000,000.0 |  |
Available under revolving credit facility | $ 2,000,000,000.0 |  |
Commitment fee percentage | 0.75% |  |
Line of Credit | Revolving Credit Facility | LIBOR |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 2.25% |  |
Line of Credit | Revolving Credit Facility | Alternative Rate Based on Certain Market Interest Rates |  |  |
Debt Instrument [Line Items] |  |  |
Basis spread on variable rate | 1.25% |  |
Secured Debt | Borrowings Financing Aircraft Purchases |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount | $ 105,000,000 |  |
Secured Debt | Special Facility Revenue Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount | $ 295,000,000 |  |
Fixed interest rate | 4.00% |  |
Mortgage | Special Facility Revenue Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 39,000,000 |  |
Senior Notes | 4.875% Senior Notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount |  | $ 350,000,000 |
Fixed interest rate |  | 4.875% |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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