Employee Benefit Plans (Components of Net Periodic Benefit Cost (Credit)) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Defined Benefit Pension Benefits [Member]
Components of net periodic benefit cost (credit)
Service cost	$ 916,000	$ 977,000	$ 1,841,000	$ 1,957,000
Interest cost	5,298,000	5,792,000	10,613,000	11,607,000
Expected return on plan assets	(6,253,000)	(5,140,000)	(12,517,000)	(10,282,000)
Amortization of prior service	(67,000)	(60,000)	(134,000)	(120,000)
Net periodic benefit cost (credit)	(106,000)	1,569,000	(197,000)	3,162,000
Defined Benefit Pension Plan in the United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			37,000,000
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			15,700,000
Postretirement Medical Benefits [Member]
Components of net periodic benefit cost (credit)
Service cost	28,000	28,000	56,000	56,000
Interest cost	36,000	37,000	72,000	74,000
Expected return on plan assets	(241,000)	(219,000)	(482,000)	(438,000)
Amortization of prior service	0	0	0	0
Net periodic benefit cost (credit)	(177,000)	(154,000)	(354,000)	(308,000)
United Kingdom Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			$ 10,000,000