Pension and Post-Retirement Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 22, 2014	Mar. 23, 2013
Pension and Other Postretirement Benefit Expense [Abstract]
Contributions to its defined benefit pension plans and post-retirement benefit plans	$ 5.1	$ 23.3
Estimated plan contributions for remainder of the year	$ 8

The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

Name:	us-gaap_PensionAndOtherPostretirementBenefitContributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration