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Details of Pass Through Trusts (Detail) - United Airlines, Inc. $ in Millions | 6 Months Ended
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Jun. 30, 2016 USD ($)
Class AA Pass Through Certificates | June 2016 |
Debt Instrument [Line Items] |
Principal | $ 729
Final expected distribution date | 2017-03
Stated interest rate | 3.10%
Total debt recorded | $ 0
Remaining proceeds from issuance of debt to be received in future periods | 729
Class A Pass Through Certificates | June 2016 |
Debt Instrument [Line Items] |
Principal | $ 324
Final expected distribution date | 2017-03
Stated interest rate | 3.45%
Total debt recorded | $ 0
Remaining proceeds from issuance of debt to be received in future periods | 324
EETC |
Debt Instrument [Line Items] |
Principal | 1,053
Total debt recorded | 0
Remaining proceeds from issuance of debt to be received in future periods | $ 1,053

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