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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Breakdown of Income Tax Expense Between Current and Deferred | 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 |
Schedule of Income Tax Expense Reconciled to Tax Computed at Statutory Rates | 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 | %
Schedule of Significant Components of Deferred Income Tax Assets and Liabilities | 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 |
Schedule of Change to Total Gross Unrecognized Tax Benefits | 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 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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