Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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-Publisher FASB
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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-Publisher FASB
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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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Employee Stock Purchase and Stock Option Plans (Information Regarding Options Outstanding, and Options Exercisable) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Nonvested not yet recognized	$ 83.7
Options exercisable, weighted average remaining contractual term (in years)	4 years 9 months 19 days
Range of exercise prices, minimum (in dollars per share)	$ 32.51	$ 32.51	$ 32.51
Range of exercise prices, maximum (in dollars per share)	$ 80.63	$ 80.63	$ 80.63
Options outstanding number (in shares)	2,516,825	3,577,512	4,072,707	4,221,147
Options outstanding weighted average remaining contractual life (in years)	5 years 4 months 13 days
Options outstanding weighted average price (in dollars per share)	$ 46.19	$ 45.69	$ 46.06	$ 53.23
Options exercisable (in shares)	1,992,022
Options exercisable weighted average exercise price (in dollars per share)	$ 46.78
$32.51 - $37.03
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum (in dollars per share)	32.51
Range of exercise prices, maximum (in dollars per share)	$ 37.03
Options outstanding number (in shares)	247,875
Options outstanding weighted average remaining contractual life (in years)	4 years 5 months 20 days
Options outstanding weighted average price (in dollars per share)	$ 36.99
Options exercisable (in shares)	247,875
Options exercisable weighted average exercise price (in dollars per share)	$ 36.99
$37.43 - $46.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum (in dollars per share)	37.43
Range of exercise prices, maximum (in dollars per share)	$ 46.09
Options outstanding number (in shares)	1,360,188
Options outstanding weighted average remaining contractual life (in years)	5 years 7 months 17 days
Options outstanding weighted average price (in dollars per share)	$ 42.69
Options exercisable (in shares)	890,206
Options exercisable weighted average exercise price (in dollars per share)	$ 42.65
$47.11 - $55.13
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum (in dollars per share)	47.11
Range of exercise prices, maximum (in dollars per share)	$ 55.13
Options outstanding number (in shares)	836,812
Options outstanding weighted average remaining contractual life (in years)	5 years 3 months 18 days
Options outstanding weighted average price (in dollars per share)	$ 52.81
Options exercisable (in shares)	788,116
Options exercisable weighted average exercise price (in dollars per share)	$ 52.80
$60.08 - $80.63
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise prices, minimum (in dollars per share)	60.08
Range of exercise prices, maximum (in dollars per share)	$ 80.63
Options outstanding number (in shares)	71,950
Options outstanding weighted average remaining contractual life (in years)	4 years 2 months 23 days
Options outstanding weighted average price (in dollars per share)	$ 66.92
Options exercisable (in shares)	65,825
Options exercisable weighted average exercise price (in dollars per share)	$ 67.52