Repurchases of Common Shares in Open Market (Detail) - Open Market Repurchases - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Mar. 26, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Mar. 26, 2016	Sep. 26, 2015
Stock Repurchase Program [Line Items]
Number of Shares	71,766	25,984	121,802	31,231	56,400	45,704	97,750	255,137
Average Repurchase Price Per Share	$ 97.54	$ 115.45	$ 115.15	$ 128.08	$ 124.11	$ 109.40
Amount	$ 7,000	$ 3,000	$ 14,026	$ 4,000	$ 7,000	$ 5,000	$ 10,000	$ 30,026

Stock Repurchase Program [Line Items]

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

+ Details

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- Definition

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).

+ References

+ Details

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- Details

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