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CONSOLIDATED INCOME STATEMENTS (Unaudited) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | [1] | Sep. 30, 2020 | Sep. 30, 2019 | [1]
Income Statement |  |  |  |
Revenue | $ 2,648 | $ 2,978 | $ 7,758 | $ 9,052
Expense |  |  |  |
Labor and Fringe | 574 | 638 | 1,687 | 1,958
Materials, Supplies and Other | 378 | 407 | 1,239 | 1,323
Depreciation | 348 | 338 | 1,036 | 1,005
Fuel | 119 | 223 | 402 | 690
Equipment and Other Rents | 88 | 85 | 247 | 265
Total Expense | 1,507 | 1,691 | 4,611 | 5,241
Operating Income | 1,141 | 1,287 | 3,147 | 3,811
Interest Expense | (187) | (186) | (565) | (548)
Other Income - Net | 14 | 24 | 51 | 72
Earnings Before Income Taxes | 968 | 1,125 | 2,633 | 3,335
Income Tax Expense | (232) | (269) | (628) | (775)
Net Earnings | $ 736 | $ 856 | $ 2,005 | $ 2,560
Per Common Share |  |  |  |
Net Earnings Per Share, Basic (in dollars per share) | $ 0.96 | $ 1.08 | $ 2.61 | $ 3.19
Net Earnings Per Share, Assuming Dilution (in dollars per share) | $ 0.96 | $ 1.08 | $ 2.61 | $ 3.18
Average Shares Outstanding (in shares) | 765 | 790 | 767 | 803
Average Shares Outstanding, Assuming Dilution (in shares) | 767 | 792 | 769 | 805
[1] | Certain prior year data has been reclassified to conform to the current presentation.

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