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CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Net Income | $ 814 | $ 848 | $ 605
Related to marketable securities: |  |  |
Unrealized holding gains (losses) arising during the period | 1 | (6) | 2
Reclassification of (gains) losses into Other-net nonoperating income (expense) | (1) | 1 | (2)
Income tax benefit (expense) | 0 | 2 | 0
Marketable securities, net of tax | 0 | (3) | 0
Related to employee benefit plans: |  |  |
Actuarial gains (losses) related to pension and other postretirement benefit plans | (43) | 10 | (210)
Reclassification of net pension expense into Wages and benefits | 20 | 14 | 9
Income tax benefit (expense) | 12 | (14) | 76
Total | (11) | 10 | (125)
Related to interest rate derivative instruments: |  |  |
Unrealized holding gains (losses) arising during the period | 8 | (5) | (8)
Reclassification of losses into Aircraft rent | 6 | 6 | 6
Income tax benefit (expense) | (5) | (1) | 0
Interest rate derivative instruments, net of tax | 9 | 0 | (2)
Other comprehensive loss | (2) | 7 | (127)
Comprehensive income | $ 812 | $ 855 | $ 478

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