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Equity Roll Forward (Tables) | 9 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of Stockholders' Equity | The change in equity for the first nine months of 2018 is shown below:
| Common Stockholders' Equity |  | Noncontrolling Interests in Subsidiaries |  | Total Equity
Balance at September 30, 2017 |  | $ | 8,718 |  |  |  | 52 |  |  |  | 8,770 |
Net earnings |  | 1,586 |  |  |  | 16 |  |  |  | 1,602 |
Other comprehensive income (loss) |  | (73 | ) |  |  | — |  |  |  | (73 | )
Cash dividends |  | (924 | ) |  |  | (21 | ) |  |  | (945 | )
Purchases of treasury stock, net of issuances |  | (897 | ) |  |  | — |  |  |  | (897 | )
Adoption of accounting standard update |  | 3 |  |  |  | — |  |  |  | 3 |
Balance at June 30, 2018 |  | $ | 8,413 |  |  |  | 47 |  |  |  | 8,460 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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