Employee Benefit Plans (Narrative) (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Employee Benefit Plans
Defined benefit pension plan cash contributions	$ 3.0	$ 1.9	$ 6.0	$ 3.8
Net defined contribution plan expense recognized	$ 2.2	$ 2.2	$ 4.8	$ 4.4

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 Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 11

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