Multiemployer Pension And Postretirement Plans (Multiemplyer Pension Plans Curtailments, Settlements and Termination Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Multiemployer Plans [Line Items]
Multiemployer Plan, withdrawal liability cash obligation payable in years	20 years
Multiemployer Plan, company contributions	$ 13.5	$ 12.6	$ 11.6
Multiemployer Pension Plans Defined Benefit [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans, withdrawal obligation	(5)	5	5
Multiemployer Plans, withdrawal obligation settlement		11
Multiemployer Other Postretirement Benefit Plans Defined Benefit Member [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, company contributions	$ 13.0	$ 14.0	$ 14.0

Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450702-114947

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450691-114947

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 5

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947

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