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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Restrictions on cash and cash equivalents | The following table provides a reconciliation of Cash and cash equivalents and restricted cash reported in the Consolidated Balance Sheet to the total of the amounts in the Consolidated Statement of Cash Flows.
December 31, | 2018 |  | 2017
(Dollars in millions) |  |  |
Cash and cash equivalents | $ | 580 |  |  | $ | 352 |
Restricted cash included in Other current assets | 3 |  |  | — |
Cash, cash equivalents and restricted cash in the statement of cash flows | $ | 583 |  |  | $ | 352 |

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