Selected Quarterly Financial Information (Unaudited) - Summary of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ 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
Selected Quarterly Financial Information [Abstract]
Net sales	$ 52,579	$ 45,408	$ 52,896	$ 78,351	$ 46,852	$ 42,358	$ 50,557	$ 75,872	$ 229,234	$ 215,639	$ 233,715
Gross margin	19,931	17,488	20,591	30,176	17,813	16,106	19,921	30,423	88,186	84,263	93,626
Net income	$ 10,714	$ 8,717	$ 11,029	$ 17,891	$ 9,014	$ 7,796	$ 10,516	$ 18,361	$ 48,351	$ 45,687	$ 53,394
Earnings per share:
Basic (in dollars per share)	$ 2.08	$ 1.68	$ 2.11	$ 3.38	$ 1.68	$ 1.43	$ 1.91	$ 3.30	$ 9.27	$ 8.35	$ 9.28
Diluted (in dollars per share)	$ 2.07	$ 1.67	$ 2.10	$ 3.36	$ 1.67	$ 1.42	$ 1.90	$ 3.28	$ 9.21	$ 8.31	$ 9.22

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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