Pension Plans and Postretirement Benefits (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011	Apr. 19, 2011
Defined Benefit Plan Disclosure [Line Items]
Plan liabilities and expense measured at discounted rate	5.50%
Pension Plans and Postretirement Benefits (Textual) [Abstract]
Pretax voluntary contribution	$ 50.0	$ 37.0
Additional cash contribution	42.8
Percentage of employees under defined benefit pension plan	27.00%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension expense	1.7	2.8
Plan liabilities and expense measured at discounted rate	6.15%		5.90%
Pension Benefits - U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected long-term rate of return on plan assets	8.25%	8.25%
U.S. Government Cost Accounting Standards [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense allocated to contracts pursuant to U.S. Government Cost Accounting Standards	$ 3.2	$ 3.0