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Cash, Cash Equivalents and Restricted Cash (Tables) | 6 Months Ended
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Jun. 30, 2018
Cash and Cash Equivalents [Abstract] |
Restrictions on Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents and restricted cash as reported within our Consolidated Condensed Statements of Cash Flows:
| Six Months Ended June 30,
Millions of dollars | 2018 |  | 2017
Cash and cash equivalents as presented in our Consolidated Condensed Balance Sheets | 1,057 |  |  | 1,041 |
Restricted cash included in prepaid and other current assets (1) | 47 |  |  | 46 |
Restricted cash included in other noncurrent assets (1) | 23 |  |  | 71 |
Cash, cash equivalents and restricted cash as presented in our Consolidated Condensed Statements of Cash Flows | $ | 1,127 |  |  | $ | 1,158 |
(1)Change in restricted cash resulted in realization of foreign currency translation adjustments of $1 million and ($3 million), respectively, for the six months ended June 30, 2018 and 2017.
| December 31,
Millions of dollars | 2017 |  | 2016
Cash and cash equivalents as presented in our Consolidated Condensed Balance Sheets | 1,196 |  |  | 1,085 |
Restricted cash included in prepaid and other current assets | 48 |  |  | 45 |
Restricted cash included in other noncurrent assets | 49 |  |  | 110 |
Cash, cash equivalents and restricted cash as presented in our Consolidated Condensed Statements of Cash Flows | $ | 1,293 |  |  | $ | 1,240 |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents and restricted cash as reported within our Consolidated Condensed Statements of Cash Flows:
| Six Months Ended June 30,
Millions of dollars | 2018 |  | 2017
Cash and cash equivalents as presented in our Consolidated Condensed Balance Sheets | 1,057 |  |  | 1,041 |
Restricted cash included in prepaid and other current assets (1) | 47 |  |  | 46 |
Restricted cash included in other noncurrent assets (1) | 23 |  |  | 71 |
Cash, cash equivalents and restricted cash as presented in our Consolidated Condensed Statements of Cash Flows | $ | 1,127 |  |  | $ | 1,158 |
(1)Change in restricted cash resulted in realization of foreign currency translation adjustments of $1 million and ($3 million), respectively, for the six months ended June 30, 2018 and 2017.
| December 31,
Millions of dollars | 2017 |  | 2016
Cash and cash equivalents as presented in our Consolidated Condensed Balance Sheets | 1,196 |  |  | 1,085 |
Restricted cash included in prepaid and other current assets | 48 |  |  | 45 |
Restricted cash included in other noncurrent assets | 49 |  |  | 110 |
Cash, cash equivalents and restricted cash as presented in our Consolidated Condensed Statements of Cash Flows | $ | 1,293 |  |  | $ | 1,240 |

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