CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Net Income | $ 256 | $ 274 | $ 700 | $ 657 |
| Related to marketable securities: | ||||
| Unrealized holding gains (losses) arising during the period | (2) | 0 | 17 | 2 |
| Reclassification of (gains) losses into Other-net nonoperating income (expense) | 0 | 0 | 1 | 0 |
| Income tax effect | 0 | 0 | (6) | (1) |
| Total | (2) | 0 | 10 | 1 |
| Related to employee benefit plans: | ||||
| Reclassification of net pension expense into Wages and benefits | 5 | 3 | 15 | 11 |
| Income tax effect | (1) | (1) | (5) | (4) |
| Total | 4 | 2 | 10 | 7 |
| Related to interest rate derivative instruments: | ||||
| Unrealized holding gains (losses) arising during the period | 1 | (5) | (6) | (8) |
| Reclassification of (gains) losses into Aircraft rent | 1 | 2 | 4 | 5 |
| Income tax effect | (1) | 2 | 1 | 2 |
| Total | 1 | (1) | (1) | (1) |
| Other Comprehensive Income | 3 | 1 | 19 | 7 |
| Comprehensive Income | $ 259 | $ 275 | $ 719 | $ 664 |