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Shareholders' Equity (Tables) | 6 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Accelerated Share Repurchase Activity and Related Information | The following table shows the Company’s ASR activity and related information during the six months ended March 31, 2018 and the year ended September 30, 2017:
| Purchase Period End Date |  | Number of Shares (in thousands) |  | Average Repurchase Price Per Share |  | ASR Amount (in millions)
November 2017 ASR | February 2018 |  | 29,269 |  | (1) | $ | 170.84 |  |  | $ | 5,000 |
August 2017 ASR | November 2017 |  | 18,887 |  |  | $ | 158.84 |  |  | $ | 3,000 |
May 2017 ASR | August 2017 |  | 20,108 |  |  | $ | 149.20 |  |  | $ | 3,000 |
February 2017 ASR | May 2017 |  | 20,949 |  |  | $ | 143.20 |  |  | $ | 3,000 |
November 2016 ASR | February 2017 |  | 51,157 |  |  | $ | 117.29 |  |  | $ | 6,000 |
August 2016 ASR | November 2016 |  | 26,850 |  |  | $ | 111.73 |  |  | $ | 3,000 |
(1) | Includes 23.6 million shares delivered and retired at the beginning of the purchase period, which began in the first quarter of 2018, and 5.7 million shares delivered and retired at the end of the purchase period, which concluded in the second quarter of 2018.
Repurchases of Common Shares in the Open Market | Additionally, the Company repurchased shares of its common stock in the open market, which were retired upon repurchase, during the periods presented as follows:
| Number of Shares (in thousands) |  | Average Repurchase Price Per Share |  | Amount (in millions)
2018: |  |  |  |  |
Second quarter | 137,040 |  |  | $ | 171.48 |  |  | $ | 23,500 |
First quarter | 30,181 |  |  | $ | 169.26 |  |  | 5,109 |
Total open market common stock repurchases | 167,221 |  |  |  |  | $ | 28,609 |
2017: |  |  |  |  |
Fourth quarter | 29,073 |  |  | $ | 154.78 |  |  | $ | 4,500 |
Third quarter | 30,356 |  |  | $ | 148.24 |  |  | 4,500 |
Second quarter | 31,070 |  |  | $ | 128.74 |  |  | 4,001 |
First quarter | 44,333 |  |  | $ | 112.78 |  |  | 5,000 |
Total open market common stock repurchases | 134,832 |  |  |  |  | $ | 18,001 |

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- Definition Tabular disclosure of information related to common stock repurchased in the open market. + References No definition available. + Details
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- Definition Tabular disclosure of accelerated share repurchase (ASR) programs. An ASR is a combination of transactions that permits an entity to purchase a targeted number of shares immediately with the final purchase price of those shares determined by an average market price over a fixed period of time. An accelerated share repurchase program is intended to combine the immediate share retirement benefits of a tender offer with the market impact and pricing benefits of a disciplined daily open market stock repurchase program. ASRs can be disclosed as part of stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- References No definition available. + Details
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