Pension Plans and Postretirement Benefits (Narrative) (Details) (USD $)	3 Months Ended						3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Mar. 30, 2014 Pension Benefits [Member]	Mar. 31, 2013 Pension Benefits [Member]	Mar. 30, 2014 Pension Benefits - U.S. Plans [Member]	Dec. 29, 2013 Pension Benefits - U.S. Plans [Member]	Mar. 30, 2014 U.S. Government Cost Accounting Standards [Member]	Mar. 31, 2013 U.S. Government Cost Accounting Standards [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension expense (income)			$ (300,000)	$ 4,300,000
Discount rate used to determine the benefit obligation					5.40%	4.40%
Pension expense allocated to contracts pursuant to U.S. Government Cost Accounting Standards							3,500,000	3,600,000
Pretax voluntary contribution	0	83,000,000
Estimated contributions in current fiscal year	$ 0