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Debt (Tables) | 6 Months Ended
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Jun. 30, 2016
Details of Pass Through Trusts | Certain details of the pass-through trusts with proceeds received from issuance of debt in 2016 are as follows (in millions, except stated interest rate):
EETC Date |  | Class |  | Principal |  |  | Final expected distribution date |  | Stated interest rate |  |  | Total debt recorded as of June 30, 2016 |  |  | Remaining proceeds from issuance of debt to be received in future periods |
June 2016 |  | AA |  |  | $ 729 |  |  | March 2017 |  |  | 3.10% |  |  |  | $ — |  |  |  | $ 729 |
June 2016 |  | A |  |  | 324 |  |  | March 2017 |  |  | 3.45% |  |  |  | — |  |  |  | 324 |
|  |  |  |  | $ 1,053 |  |  |  |  |  |  |  |  |  | $ — |  |  |  | $ 1,053 |

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- Definition Schedule of Debt Instruments Pass Through Trusts + References No definition available. + Details
Name: | ual_ScheduleOfDebtInstrumentsPassThroughTrustsTableTextBlock
Namespace Prefix: | ual_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration