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Income Taxes | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Income Taxes | Income Taxes Earnings before income taxes of $4.3 billion, $3.1 billion and $2.7 billion for fiscal years 2018, 2017 and 2016, respectively, represent earnings from domestic operations. The breakdown of income tax expense between current and deferred is as follows:
| Fiscal Years
(Dollars in Millions) | 2018 |  | 2017 |  | 2016
Current: |  |  |
Federal | $ | 572 |  |  | $ | 787 |  |  | $ | 540 |
State | 144 |  |  | 117 |  |  | 82 |
Subtotal Current | 716 |  |  | 904 |  |  | 622 |
Deferred: |  |  |  |  |
Federal | 275 |  |  | (3,277 | ) |  | 355 |
State | 4 |  |  | 44 |  |  | 50 |
Subtotal Deferred | 279 |  |  | (3,233 | ) |  | 405 |
Total | $ | 995 |  |  | $ | (2,329 | ) |  | $ | 1,027 |
The Company recorded a 2018 income tax benefit of $62 million primarily as a result of the additional tax benefit associated with vesting of share-based awards, state legislative changes, the settlement of certain state tax matters and a change in the valuation of deferred taxes as a result of filing the 2017 tax returns. With the enactment of the Tax Cuts and Jobs Act (the "Act" or "tax reform") on December 22, 2017, the Company's 2017 financial results included a $3.5 billion, or $3.81 per share, non-cash reduction in income tax expense, primarily resulting from revaluing the Company's net deferred tax liabilities to reflect the enacted 21% federal corporate tax rate effective January 1, 2018. During third quarter 2018, the Company filed its 2017 Federal Income Tax return which resulted in an immaterial adjustment to the deferred tax liability and tax expense. Accordingly, the Company's accounting for the federal rate reduction under the Tax Cuts and Jobs Act (“the Act”) is now complete. The Company's affiliates also revalued their deferred tax liabilities to reflect the lower federal corporate tax rate, which resulted in the Company recognizing a benefit in 2017 of $142 million, or $0.10 per share after-tax, in equity earnings of affiliates, which is included in operating income. (See additional discussion over equity earnings of affiliates in Note 12, Related Parties and Affiliates.) In addition to the tax benefit related to tax reform, the Company recorded a 2017 income tax benefit of $21 million primarily as a result of the additional tax benefit associated with vesting of share-based awards, state legislative changes, a change in the apportionment of state taxable income and the related impact on the valuation of deferred taxes and the settlement of certain state tax matters. In 2016, the Company recorded an income tax expense adjustment of $10 million as a result of a change in the apportionment of state income taxes and the related impact on the valuation of deferred taxes as well as a $7 million tax benefit as a result of federal and state legislative changes. NOTE 11. Income Taxes, continued Income tax expense reconciled to the tax computed at statutory rates is presented in the following table.
| Fiscal Years
(Dollars In Millions) | 2018 |  | 2017 |  | 2016
Federal Income Taxes | $ | 904 |  |  | 21.0 | % |  | $ | 1,100 |  |  | 35.0 | % |  | $ | 959 |  |  | 35.0 | %
State Income Taxes | 112 |  |  | 2.6 | % |  | 102 |  |  | 3.2 | % |  | 83 |  |  | 3.0 | %
Deferred Tax Rate Change | — |  |  | — | % |  | (3,506 | ) |  | (111.6 | )% |  | — |  |  | — | %
Other | (21 | ) |  | (0.5 | )% |  | (25 | ) |  | (0.8 | )% |  | (15 | ) |  | (0.5 | )%
Income Tax (Benefit) Expense/Rate | $ | 995 |  |  | 23.1 | % |  | $ | (2,329 | ) |  | (74.2 | )% |  | $ | 1,027 |  |  | 37.5 | %
The primary factors in the change in year-end net deferred income tax liability balances include the annual provision for deferred income tax expense and accumulated other comprehensive income/loss. The significant components of deferred income tax assets and liabilities include:
| 2018 |  | 2017
(Dollars in Millions) | Assets |  | Liabilities |  | Assets |  | Liabilities
Pension Plans | $ | 79 |  |  | $ | — |  |  | $ | 41 |  |  | $ | — |
Other Employee Benefit Plans | 146 |  |  | — |  |  | 182 |  |  | — |
Accelerated Depreciation | — |  |  | 6,799 |  |  | — |  |  | 6,576 |
Other | 529 |  |  | 645 |  |  | 657 |  |  | 722 |
Total | $ | 754 |  |  | $ | 7,444 |  |  | $ | 880 |  |  | $ | 7,298 |
Net Deferred Income Tax Liabilities |  |  |  | $ | 6,690 |  |  |  |  |  | $ | 6,418 |
The Company files a consolidated federal income tax return, which includes its principal domestic subsidiaries. CSX and its subsidiaries are subject to U.S. federal income tax as well as income tax of multiple state jurisdictions. CSX participated in a contemporaneous IRS audit of tax years 2017 and 2018. Federal examinations of original federal income tax returns for all years through 2016 are resolved. NOTE 11. Income Taxes, continued As of December 2018, 2017 and 2016, the Company had approximately $12 million, $24 million and $25 million, respectively, of total unrecognized tax benefits as a result of uncertain tax positions. Net tax benefits of $9 million, $19 million and $16 million in 2018, 2017 and 2016, respectively, could favorably impact the effective income tax rate in each year. The Company does not expect that unrecognized tax benefits as of December 2018 for various state and federal income tax matters will significantly change over the next 12 months. The final outcome of these uncertain tax positions is not yet determinable. The change to the total gross unrecognized tax benefits and prior year audit resolutions of the Company during the fiscal year ended December 2018 is reconciled in the table below.
Unrecognized Tax Benefits: | Fiscal Year
(Dollars in Millions) | 2018 |  | 2017 |  | 2016
Balance at beginning of the year | $ | 24 |  |  | $ | 25 |  |  | $ | 23 |
Additions based on tax positions related to current year | 1 |  |  | 1 |  |  | 1 |
Additions based on tax positions related to prior years | 3 |  |  | 4 |  |  | 4 |
Reductions based on tax positions related to prior years | — |  |  | — |  |  | — |
Settlements with taxing authorities | (11 | ) |  | (4 | ) |  | — |
Lapse of statute of limitations | (5 | ) |  | (2 | ) |  | (3 | )
Balance at end of the year | $ | 12 |  |  | $ | 24 |  |  | $ | 25 |
CSX’s continuing practice is to recognize net interest and penalties related to income tax matters in income tax expense. Included in the consolidated income statements is a benefit of $3 million, and expenses of $3 million and $2 million in 2018, 2017 and 2016, respectively, for changes to reserves for interest and penalties for all prior year tax positions. The Company had $2 million, $6 million and $6 million accrued for interest and penalties at 2018, 2017 and 2016, respectively, for all prior year tax positions.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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