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Details of Pass Through Trusts (Detail) - United Airlines, Inc. $ in Millions | 9 Months Ended
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Sep. 30, 2016 USD ($)
Class AA Pass Through Certificates | September Twenty Sixteen [Member] |
Debt Instrument [Line Items] |
Principal | $ 637
Final expected distribution date | 2028-10
Stated interest rate | 2.875%
Remaining proceeds from issuance of debt to be received in future periods | $ 637
Class AA Pass Through Certificates | June 2016 |
Debt Instrument [Line Items] |
Principal | $ 729
Final expected distribution date | 2028-07
Stated interest rate | 3.10%
Total debt recorded | $ 222
Remaining proceeds from issuance of debt to be received in future periods | 507
Class A Pass Through Certificates | September Twenty Sixteen [Member] |
Debt Instrument [Line Items] |
Principal | $ 283
Final expected distribution date | 2028-10
Stated interest rate | 3.10%
Remaining proceeds from issuance of debt to be received in future periods | $ 283
Class A Pass Through Certificates | June 2016 |
Debt Instrument [Line Items] |
Principal | $ 324
Final expected distribution date | 2028-07
Stated interest rate | 3.45%
Total debt recorded | $ 99
Remaining proceeds from issuance of debt to be received in future periods | 225
EETC |
Debt Instrument [Line Items] |
Principal | 1,973
Total debt recorded | 321
Remaining proceeds from issuance of debt to be received in future periods | $ 1,652

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