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Shareholders' Equity - Summary of Dividends Declared and Paid (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
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Sep. 24, 2016 | Jun. 25, 2016 | Mar. 26, 2016 | Dec. 26, 2015 | Sep. 26, 2015 | Jun. 27, 2015 | Mar. 28, 2015 | Dec. 27, 2014 | Sep. 24, 2016 | Sep. 26, 2015 | Sep. 27, 2014
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Dividends per share (in dollars per share) | $ 0.57 | $ 0.57 | $ 0.52 | $ 0.52 | $ 0.52 | $ 0.52 | $ 0.47 | $ 0.47 | $ 2.18 | $ 1.98 | $ 1.82
Amount | $ 3,071 | $ 3,117 | $ 2,879 | $ 2,898 | $ 2,950 | $ 2,997 | $ 2,734 | $ 2,750 | $ 11,965 | $ 11,431 |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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