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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of shares of common stock | The following table summarizes total shares of common stock outstanding:
| December 31
Millions of shares | 2018 | 2017
Issued | 1,069 |  | 1,069 |
In treasury | (198 | ) | (196 | )
Total shares of common stock outstanding | 871 |  | 873 |
Schedule of accumulated other comprehensive income (loss) | Accumulated other comprehensive loss consisted of the following:
| December 31
Millions of dollars | 2018 | 2017
Defined benefit and other postretirement liability adjustments (a) | $ | (203 | ) | $ | (334 | )
Cumulative translation adjustment | (82 | ) | (80 | )
Other | (70 | ) | (55 | )
Total accumulated other comprehensive loss | $ | (355 | ) | $ | (469 | )
(a) Included net actuarial losses for our international pension plans of $184 million at December 31, 2018 and $295 million at December 31, 2017.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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