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Summarized Consolidating Financial Data (Consolidating Income Statement) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 30, 2016
Consolidated Income Statement |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 3,143 | $ 3,129 | $ 3,102 | $ 2,876 | $ 2,863 | $ 2,743 | $ 2,933 | $ 2,869 | $ 12,250 | $ 11,408 | $ 11,069
Expense |  |  |  |  |  |  |  |  | 7,381 | 7,688 | 7,656
Operating Income | 1,249 | 1,293 | 1,283 | 1,044 | 1,126 | 868 | 957 | 769 | 4,869 | 3,720 | 3,413
Equity in Earnings of Subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest Expense |  |  |  |  |  |  |  |  | (639) | (546) | (579)
Other Income - Net |  |  |  |  |  |  |  |  | 74 | (32) | (93)
Earnings Before Income Taxes |  |  |  |  |  |  |  |  | 4,304 | 3,142 | 2,741
Income Tax Benefit (Expense) |  |  |  |  |  |  |  |  | (995) | 2,329 | (1,027)
Net Earnings | $ 843 | $ 894 | $ 877 | $ 695 | $ 4,140 | $ 459 | $ 510 | $ 362 | 3,309 | 5,471 | 1,714
Total Comprehensive Earnings |  |  |  |  |  |  |  |  | 3,134 | 5,625 | 1,739
Eliminations and Other |  |  |  |  |  |  |  |  |  |  |
Consolidated Income Statement |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 76 | 74 | 78
Expense |  |  |  |  |  |  |  |  | (143) | (163) | (165)
Operating Income |  |  |  |  |  |  |  |  | 219 | 237 | 243
Equity in Earnings of Subsidiaries |  |  |  |  |  |  |  |  | (3,580) | (5,810) | (1,999)
Interest Expense |  |  |  |  |  |  |  |  | 142 | 65 | 39
Other Income - Net |  |  |  |  |  |  |  |  | (102) | (20) | (11)
Earnings Before Income Taxes |  |  |  |  |  |  |  |  | (3,321) | (5,528) | (1,728)
Income Tax Benefit (Expense) |  |  |  |  |  |  |  |  | (62) | 4 | (93)
Net Earnings |  |  |  |  |  |  |  |  | (3,383) | (5,524) | (1,821)
Total Comprehensive Earnings |  |  |  |  |  |  |  |  | (3,441) | (5,538) | (1,833)
CSX Corporation |  |  |  |  |  |  |  |  |  |  |
Consolidated Income Statement |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 | 0 | 0
Expense |  |  |  |  |  |  |  |  | (344) | (158) | (265)
Operating Income |  |  |  |  |  |  |  |  | 344 | 158 | 265
Equity in Earnings of Subsidiaries |  |  |  |  |  |  |  |  | 3,580 | 5,810 | 1,997
Interest Expense |  |  |  |  |  |  |  |  | (742) | (582) | (583)
Other Income - Net |  |  |  |  |  |  |  |  | 24 | 7 | (112)
Earnings Before Income Taxes |  |  |  |  |  |  |  |  | 3,206 | 5,393 | 1,567
Income Tax Benefit (Expense) |  |  |  |  |  |  |  |  | 103 | 78 | 147
Net Earnings |  |  |  |  |  |  |  |  | 3,309 | 5,471 | 1,714
Total Comprehensive Earnings |  |  |  |  |  |  |  |  | 3,134 | 5,625 | 1,739
CSX Transportation |  |  |  |  |  |  |  |  |  |  |
Consolidated Income Statement |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 12,174 | 11,334 | 10,991
Expense |  |  |  |  |  |  |  |  | 7,868 | 8,009 | 8,086
Operating Income |  |  |  |  |  |  |  |  | 4,306 | 3,325 | 2,905
Equity in Earnings of Subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 2
Interest Expense |  |  |  |  |  |  |  |  | (39) | (29) | (35)
Other Income - Net |  |  |  |  |  |  |  |  | 152 | (19) | 30
Earnings Before Income Taxes |  |  |  |  |  |  |  |  | 4,419 | 3,277 | 2,902
Income Tax Benefit (Expense) |  |  |  |  |  |  |  |  | (1,036) | 2,247 | (1,081)
Net Earnings |  |  |  |  |  |  |  |  | 3,383 | 5,524 | 1,821
Total Comprehensive Earnings |  |  |  |  |  |  |  |  | $ 3,441 | $ 5,538 | $ 1,833

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