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Schedule of Cash and Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Current assets: |  |  |  |
Cash and cash equivalents | $ 1,482 | $ 2,179 | $ 3,006 |
Other assets: |  |  |  |
Restricted cash | 91 | 124 | 204 |
Total cash, cash equivalents and restricted cash shown in the statement of consolidated cash flows | 1,591 | 2,303 | 3,212 | $ 2,322
Prepaid Expenses and Other |  |  |  |
Current assets: |  |  |  |
Restricted cash | 18 |  | 2 |
United Airlines, Inc. |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 1,476 | 2,173 | 3,000 |
Other assets: |  |  |  |
Restricted cash | 91 | 124 | 204 |
Total cash, cash equivalents and restricted cash shown in the statement of consolidated cash flows | 1,585 | $ 2,297 | 3,206 | $ 2,316
United Airlines, Inc. | Prepaid Expenses and Other |  |  |  |
Current assets: |  |  |  |
Restricted cash | $ 18 |  | $ 2 |

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