Retirement Plans (Schedule Of Future Cash Flows) (Details) (USD $)	4 Months Ended
Jan. 20, 2013
Defined Benefit Plan Disclosure [Line Items]
Minimum required contribution for retirement plans	$ 0
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	6,140,000
Remaining estimated net contributions during fiscal 2012	12,000,000
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net year-to-date contributions	302,000
Remaining estimated net contributions during fiscal 2012	$ 1,100,000

The increase in the fair value of plan assets from contributions made by the employer.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

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