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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Mar. 31, 2018
Accounting Policies [Abstract] |
Computation of Basic and Diluted Earnings Per Share | The following table shows the computation of basic and diluted earnings per share for the three- and six-month periods ended March 31, 2018 and April 1, 2017 (net income in millions and shares in thousands):
| Three Months Ended |  | Six Months Ended
| March 31, 2018 |  | April 1, 2017 |  | March 31, 2018 |  | April 1, 2017
Numerator: |  |  |  |  |  |  |
Net income | $ | 13,822 |  |  | $ | 11,029 |  |  | $ | 33,887 |  |  | $ | 28,920 |
Denominator: |  |  |  |  |  |  |
Weighted-average basic shares outstanding | 5,024,877 |  |  | 5,225,791 |  |  | 5,068,877 |  |  | 5,262,226 |
Effect of dilutive securities | 43,616 |  |  | 35,897 |  |  | 44,263 |  |  | 32,615 |
Weighted-average diluted shares | 5,068,493 |  |  | 5,261,688 |  |  | 5,113,140 |  |  | 5,294,841 |
Basic earnings per share | $ | 2.75 |  |  | $ | 2.11 |  |  | $ | 6.69 |  |  | $ | 5.50 |
Diluted earnings per share | $ | 2.73 |  |  | $ | 2.10 |  |  | $ | 6.63 |  |  | $ | 5.46 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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