Benefit Plans - Restricted Stock Units Activity and Related Information (Details) - Restricted stock units - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
Sep. 26, 2020	Sep. 28, 2019	Sep. 29, 2018
Number of Restricted Stock Units
Beginning balance (in shares)	326,068	368,618	390,284
RSUs granted (in shares)	156,800	147,409	181,402
RSUs vested (in shares)	(157,743)	(168,350)	(178,873)
RSUs canceled (in shares)	(14,347)	(21,609)	(24,195)
Ending balance (in shares)	310,778	326,068	368,618
Weighted-Average Grant Date Fair Value Per RSU
Beginning balance (in dollars per share)	$ 42.30	$ 33.65	$ 27.58
RSUs granted (in dollars per share)	59.20	53.99	40.72
RSUs vested (in dollars per share)	40.29	33.80	27.81
RSUs canceled (in dollars per share)	48.07	40.71	31.95
Ending balance (in dollars per share)	$ 51.58	$ 42.30	$ 33.65
Aggregate Fair Value
Aggregate fair value of RSUs	$ 34,894

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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