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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Operating Revenues |  |
Passenger revenue | $ 1,685 | $ 1,602
Mileage plan other revenue | 107 | 100
Cargo and other | 40 | 38
Total Operating Revenues | 1,832 | 1,740
Operating Expenses |  |
Wages and benefits | 536 | 450
Variable incentive pay | 39 | 31
Aircraft fuel, including hedging gains and losses | 409 | 339
Aircraft maintenance | 107 | 87
Aircraft rent | 74 | 65
Landing fees and other rentals | 126 | 115
Contracted services | 81 | 81
Selling expenses | 78 | 83
Depreciation and amortization | 94 | 90
Food and beverage service | 50 | 45
Third-party regional carrier expense | 37 | 27
Other | 141 | 131
Special items—merger-related costs | 6 | 39
Special items—other | 25 | 0
Total Operating Expenses | 1,803 | 1,583
Operating Income | 29 | 157
Nonoperating Income (Expense) |  |
Interest income | 8 | 7
Interest expense | (24) | (25)
Interest capitalized | 5 | 4
Other—net | (12) | (1)
Nonoperating Income (Expense) Total | (23) | (15)
Income Before Income Tax | 6 | 142
Income tax expense | 2 | 49
Net Income | $ 4 | $ 93
Basic Earnings Per Share (usd per share) | $ 0.03 | $ 0.75
Diluted Earnings Per Share (usd per share) | $ 0.03 | $ 0.75
Shares used for computation: |  |
Basic shares (shares) | 123,155 | 123,495
Diluted shares (shares) | 123,630 | 124,299
Cash dividend declared per share (usd per share) | $ 0.32 | $ 0.3

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