Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation JetBlue Airways Corporation, or JetBlue, provides air transportation services across the United States, the Caribbean and Latin America, and between New York and London. Our condensed consolidated financial statements include the accounts of JetBlue and our subsidiaries which are collectively referred to as “we” or the “Company”. All majority-owned subsidiaries are consolidated on a line by line basis, with all intercompany transactions and balances being eliminated. These condensed consolidated financial statements and related notes should be read in conjunction with our 2021 audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2021, or our 2021 Form 10-K. These condensed consolidated financial statements are unaudited and have been prepared by us following the rules and regulations of the U.S. Securities and Exchange Commission, or the SEC. In our opinion they reflect all adjustments, including normal recurring items, that are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States, or GAAP, have been condensed or omitted as permitted by such rules and regulations; however, we believe that the disclosures are adequate to make the information presented not misleading.
Investment Securities	Investment Securities Investment securities consist of available-for-sale investment securities, held-to-maturity investment securities, and equity securities. When sold, we use a specific identification method to determine the cost of the securities. Available-for-sale investment securities. Our available-for-sale investment securities include investments such as time deposits, U.S. Treasury bills with maturities between three and twelve months, commercial paper, and convertible debt securities. The fair values of these instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the fair value hierarchy.Held-to-maturity investment securities. Our held-to-maturity investment securities consist of investment-grade interest bearing instruments, such as corporate bonds and U.S. Treasury notes, which are stated at amortized cost. We do not intend to sell these investment securities and the contractual maturities are not greater than 24 months. Those with maturities less than twelve months are included in short-term investments on our consolidated balance sheets. Those with remaining maturities in excess of twelve months are included in long-term investments on our consolidated balance sheets. Available-for-sale investment securities Our available-for-sale investment securities include investments such as time deposits and convertible debt securities. The fair values of these instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the hierarchy. We did not record any material gains or losses on these instruments during the three months ended March 31, 2022 and 2021. Equity investment securities Our equity investment securities include investments in common stocks of publicly traded companies. The fair values of these instruments are classified as Level 1 in the hierarchy as they are based on unadjusted quoted prices in active markets for identical assets. We recognized a net unrealized loss of $2 million on these securities during the three months ended March 31, 2022. No gains or losses were recorded during the same period in 2021.
Other Investments	Other InvestmentsOur wholly-owned subsidiary, JetBlue Technology Ventures, LLC, or JTV, has equity investments in emerging companies which do not have readily determinable fair values. In accordance with Topic 321, Investments - Equity Securities of the Financial Accounting Standards Board (the "FASB") Accounting Standards Codification (the "Codification"), we account for these investments using a measurement alternative which allows entities to measure these investments at cost, less any impairment, adjusted for changes from observable price changes in orderly transactions for identifiable or similar investments of the same issuer.
Equity Method Investments	Equity Method InvestmentsInvestments in which we can exercise significant influence are accounted for using the equity method in accordance with Topic 323, Investments - Equity Method and Joint Ventures of the FASB Codification.
Cash Equivalents	Cash equivalents Our cash equivalents include money market securities and time deposits which are readily convertible into cash, have maturities of three months or less when purchased, and are considered to be highly liquid and easily tradable. The money market securities are valued using inputs observable in active markets for identical securities and are therefore classified as Level 1 within our fair value hierarchy. The fair values of remaining instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the hierarchy.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

JetBlue Airways Corporation, or JetBlue, provides air transportation services across the United States, the Caribbean and Latin America, and between New York and London. Our condensed consolidated financial statements include the accounts of JetBlue and our subsidiaries which are collectively referred to as “we” or the “Company”. All majority-owned subsidiaries are consolidated on a line by line basis, with all intercompany transactions and balances being eliminated. These condensed consolidated financial statements and related notes should be read in conjunction with our 2021 audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2021, or our 2021 Form 10-K.

These condensed consolidated financial statements are unaudited and have been prepared by us following the rules and regulations of the U.S. Securities and Exchange Commission, or the SEC. In our opinion they reflect all adjustments, including normal recurring items, that are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States, or GAAP, have been condensed or omitted as permitted by such rules and regulations; however, we believe that the disclosures are adequate to make the information presented not misleading.

Investment Securities

Investment securities consist of available-for-sale investment securities, held-to-maturity investment securities, and equity securities. When sold, we use a specific identification method to determine the cost of the securities.

Available-for-sale investment securities. Our available-for-sale investment securities include investments such as time deposits, U.S. Treasury bills with maturities between three and twelve months, commercial paper, and convertible debt securities.

The fair values of these instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the fair value hierarchy.Held-to-maturity investment securities. Our held-to-maturity investment securities consist of investment-grade interest bearing instruments, such as corporate bonds and U.S. Treasury notes, which are stated at amortized cost. We do not intend to sell these investment securities and the contractual maturities are not greater than 24 months. Those with maturities less than twelve months are included in short-term investments on our consolidated balance sheets. Those with remaining maturities in excess of twelve months are included in long-term investments on our consolidated balance sheets.

Available-for-sale investment securities

Our available-for-sale investment securities include investments such as time deposits and convertible debt securities. The fair values of these instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the hierarchy. We did not record any material gains or losses on these instruments during the three months ended March 31, 2022 and 2021.

Equity investment securities

Our equity investment securities include investments in common stocks of publicly traded companies. The fair values of these instruments are classified as Level 1 in the hierarchy as they are based on unadjusted quoted prices in active markets for identical assets. We recognized a net unrealized loss of $2 million on these securities during the three months ended March 31, 2022. No gains or losses were recorded during the same period in 2021.

Other Investments

Other InvestmentsOur wholly-owned subsidiary, JetBlue Technology Ventures, LLC, or JTV, has equity investments in emerging companies which do not have readily determinable fair values. In accordance with Topic 321, Investments - Equity Securities of the Financial Accounting Standards Board (the "FASB") Accounting Standards Codification (the "Codification"), we account for these investments using a measurement alternative which allows entities to measure these investments at cost, less any impairment, adjusted for changes from observable price changes in orderly transactions for identifiable or similar investments of the same issuer.

Equity Method Investments

Equity Method InvestmentsInvestments in which we can exercise significant influence are accounted for using the equity method in accordance with Topic 323, Investments - Equity Method and Joint Ventures of the FASB Codification.

Cash Equivalents

Cash equivalents Our cash equivalents include money market securities and time deposits which are readily convertible into cash, have maturities of three months or less when purchased, and are considered to be highly liquid and easily tradable. The money market securities are valued using inputs observable in active markets for identical securities and are therefore classified as Level 1 within our fair value hierarchy. The fair values of remaining instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the hierarchy.