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Information Relating to the Consolidated Statement of Cash Flows (Tables) | 12 Months Ended
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Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract] |
Schedule of information relating to the consolidated statement of cash flows |
| Year ended December 31 |
| 2018 |  |  |  | 2017 |  |  | 2016 |
Net decrease (increase) in operating working capital was composed of the following: |  |  |  |  |  |
Decrease (increase) in accounts and notes receivable | $ | 437 |  |  |  | $ | (915 | ) |  | $ | (2,121 | )
Decrease (increase) in inventories | (424 | ) |  |  | (267 | ) |  | 603 |
Decrease (increase) in prepaid expenses and other current assets 1 | (149 | ) |  |  | 173 |  |  | 829 |
Increase (decrease) in accounts payable and accrued liabilities 1 | (494 | ) |  |  | 998 |  |  | 366 |
Increase (decrease) in income and other taxes payable | (88 | ) |  |  | 531 |  |  | (4 | )
Net decrease (increase) in operating working capital | $ | (718 | ) |  |  | $ | 520 |  |  | $ | (327 | )
Net cash provided by operating activities includes the following cash payments: |  |  |  |  |  |
Interest on debt (net of capitalized interest) | $ | 736 |  |  |  | $ | 265 |  |  | $ | 158 |
Income taxes | 4,748 |  |  |  | 3,132 |  |  | 1,935 |
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts: |  |  |  |  |  |
Proceeds and deposits related to asset sales 1 | $ | 2,000 |  |  |  | $ | 4,930 |  |  | $ | 3,154 |
Returns of investment from equity affiliates 2 | 392 |  |  |  | 166 |  |  | 322 |
Proceeds and deposits related to asset sales and returns of investment | $ | 2,392 |  |  |  | $ | 5,096 |  |  | $ | 3,476 |
Net maturities (investments) of time deposits consisted of the following gross amounts: |  |  |  |  |  |
Investments in time deposits | $ | (950 | ) |  |  | $ | — |  |  | $ | — |
Maturities of time deposits | — |  |  |  | — |  |  | — |
Net maturities of (investments in) time deposits | $ | (950 | ) |  |  | $ | — |  |  | $ | — |
Net sales (purchases) of marketable securities consisted of the following gross amounts: |  |  |  |  |  |
Marketable securities purchased | $ | (51 | ) |  |  | $ | (3 | ) |  | $ | (9 | )
Marketable securities sold | — |  |  |  | 7 |  |  | 306 |
Net sales (purchases) of marketable securities | $ | (51 | ) |  |  | $ | 4 |  |  | $ | 297 |
Net repayment (borrowing) of loans by equity affiliates: |  |  |  |  |  |
Borrowing of loans by equity affiliates | $ | — |  |  |  | $ | (142 | ) |  | $ | (2,341 | )
Repayment of loans by equity affiliates | 111 |  |  |  | 126 |  |  | 307 |
Net repayment (borrowing) of loans by equity affiliates | $ | 111 |  |  |  | $ | (16 | ) |  | $ | (2,034 | )
Net borrowings (repayments) of short-term obligations consisted of the following gross and net amounts: |  |  |  |  |  |
Proceeds from issuances of short-term obligations | $ | 2,486 |  |  |  | $ | 5,051 |  |  | $ | 14,778 |
Repayments of short-term obligations | (4,136 | ) |  |  | (8,820 | ) |  | (12,558 | )
Net borrowings (repayments) of short-term obligations with three months or less maturity | 3,671 |  |  |  | (1,373 | ) |  | (90 | )
Net borrowings (repayments) of short-term obligations | $ | 2,021 |  |  |  | $ | (5,142 | ) |  | $ | 2,130 |
1 2017 and 2016 adjusted to conform to ASU 2016-18. |  |  |  |  |  |
2 Per ASU 2016-15. |  |  |  |  |  |
The table below quantifies the beginning and ending balances of restricted cash and restricted cash equivalents in the Consolidated Balance Sheet:
| Year ended December 31 |
| 2018 |  |  |  | 2017 |  |  | 2016 |  |  | 2015 |
Cash and cash equivalents | $ | 9,342 |  |  |  | $ | 4,813 |  |  | $ | 6,988 |  |  | $ | 11,022 |
Restricted cash included in "Prepaid expenses and other current assets" | 341 |  |  |  | 405 |  |  | 488 |  |  | 196 |
Restricted cash included in "Deferred charges and other assets" | 798 |  |  |  | 725 |  |  | 938 |  |  | 904 |
Total cash, cash equivalents and restricted cash | $ | 10,481 |  |  |  | $ | 5,943 |  |  | $ | 8,414 |  |  | $ | 12,122 |
Capital expenditures | The major components of “Capital expenditures” and the reconciliation of this amount to the reported capital and exploratory expenditures, including equity affiliates, are presented in the following table:
| Year ended December 31 |
| 2018 |  |  |  | 2017 |  |  | 2016 |
Additions to properties, plant and equipment * | $ | 13,384 |  |  |  | $ | 13,222 |  |  | $ | 17,742 |
Additions to investments | 65 |  |  |  | 25 |  |  | 55 |
Current-year dry hole expenditures | 344 |  |  |  | 157 |  |  | 313 |
Payments for other liabilities and assets, net | (1 | ) |  |  | — |  |  | (1 | )
Capital expenditures | 13,792 |  |  |  | 13,404 |  |  | 18,109 |
Expensed exploration expenditures | 523 |  |  |  | 666 |  |  | 544 |
Assets acquired through capital lease obligations and other financing obligations | 75 |  |  |  | 8 |  |  | 5 |
Capital and exploratory expenditures, excluding equity affiliates | 14,390 |  |  |  | 14,078 |  |  | 18,658 |
Company's share of expenditures by equity affiliates | 5,716 |  |  |  | 4,743 |  |  | 3,770 |
Capital and exploratory expenditures, including equity affiliates | $ | 20,106 |  |  |  | $ | 18,821 |  |  | $ | 22,428 |
* | Excludes non-cash additions of $25 in 2018, $1,183 in 2017 and $56 in 2016.

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