Retirement Plans (Defined Contribution Plan) (Details) - Defined Contribution Plan, 401 K [Member] - USD ($) $ in Millions	12 Months Ended
Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent of match	50.00%
Defined Contribution Plan, Cost Recognized	$ 23.7	$ 20.5	$ 20.3

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration