Pension and Postretirement Plans (Obligation, Asset, and Funding Information) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10,876	$ 6,760	$ 28,684	$ 20,734
Interest cost	14,828	14,964	44,248	45,033
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	367	380	1,100	1,140
Interest cost	1,060	1,084	3,181	3,252
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	778	718	2,335	2,154
Interest cost	$ 684	$ 766	$ 2,052	$ 2,297