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Shareholders' Equity - Repurchases of Common Shares in Open Market (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Stock Repurchase Program [Line Items]
Amount									$ 33,001	$ 29,000	$ 36,026
Open Market Repurchases
Stock Repurchase Program [Line Items]
Number of shares repurchased (in shares)	29,073	30,356	31,070	44,333	28,579	41,238	71,766	25,984	134,832	167,567
Average repurchase price per share (in dollars per share)	$ 154.78	$ 148.24	$ 128.74	$ 112.78	$ 104.97	$ 97.00	$ 97.54	$ 115.45
Amount	$ 4,500	$ 4,500	$ 4,001	$ 5,000	$ 3,000	$ 4,000	$ 7,000	$ 3,000	$ 18,001	$ 17,000

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Stock Repurchase Program [Line Items]

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The weighted average price of the shares that have been repurchased and retired during the period.

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Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Topic 505
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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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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

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-Name Accounting Standards Codification
-Topic 210
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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