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Schedule of Adoption of ASC 606 and Expected Impact - Consolidated Balance Sheets (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current assets: |  |
Prepaid expenses and other | $ 1,051 | $ 832
Other assets: |  |
Deferred income taxes |  | 655
Current liabilities: |  |
Advance ticket sales | 3,876 | 3,730
Frequent flyer deferred revenue | 2,176 | 2,135
Other | 569 | 1,010
Other liabilities and deferred credits: |  |
Frequent flyer deferred revenue | 2,565 | 2,748
Advanced purchase of miles |  | 430
Deferred income taxes | 225 |
Stockholders' equity: |  |
Retained earnings | 4,621 | 3,427
ASC 606 |  |
Current assets: |  |
Prepaid expenses and other | 1,071 | 852
Other assets: |  |
Deferred income taxes |  | 703
Current liabilities: |  |
Advance ticket sales | 3,940 | 3,795
Frequent flyer deferred revenue | 2,192 | 2,149
Other | 576 | 1,089
Other liabilities and deferred credits: |  |
Frequent flyer deferred revenue | 2,591 | 2,740
Advanced purchase of miles |  | 433
Deferred income taxes | 204 |
Stockholders' equity: |  |
Retained earnings | 4,549 | 3,342
Scenario, Previously Reported | ASC 606 |  |
Current assets: |  |
Prepaid expenses and other | 1,051 | 832
Other assets: |  |
Deferred income taxes |  | 655
Current liabilities: |  |
Advance ticket sales | 3,876 | 3,730
Frequent flyer deferred revenue | 2,176 | 2,135
Other | 569 | 1,010
Other liabilities and deferred credits: |  |
Frequent flyer deferred revenue | 2,565 | 2,748
Advanced purchase of miles |  | 430
Deferred income taxes | 225 |
Stockholders' equity: |  |
Retained earnings | 4,621 | 3,427
Adjustment | ASC 606 |  |
Current assets: |  |
Prepaid expenses and other | 20 | 20
Other assets: |  |
Deferred income taxes |  | 48
Current liabilities: |  |
Advance ticket sales | 64 | 65
Frequent flyer deferred revenue | 16 | 14
Other | 7 | 79
Other liabilities and deferred credits: |  |
Frequent flyer deferred revenue | 26 | (8)
Advanced purchase of miles |  | 3
Deferred income taxes | (21) |
Stockholders' equity: |  |
Retained earnings | $ (72) | $ (85)

X
- Definition Value of revenue deferred for miles purchased by our business partners that have not been awarded to our frequent flyer loyalty program members. The sale of these miles includes marketing and air transportation components. When our partners award the miles to our program members, the marketing component is recognized as other operating revenue and the air transportation component is transferred to deferred revenue. Used to reflect the noncurrent portion of the liability. + References No definition available. + Details
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- Definition The value of air transportation services sold but as yet unused by the passenger, including sales for air transportation to be provided by the reporting air carrier and air transportation to be provided by another air carrier for whom sales were made. Used to reflect the current portion of the liability (within one year or within the normal operating cycle if longer). + References No definition available. + Details
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