Pension and Postretirement Plans (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 02, 2011
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Pension Plans [Member]
Statement [Line Items]
Noncurrent asset	537,262	538,753
Current liability	0	0
Noncurrent liability	0	0
Recognized asset (liability)	537,262	538,753
Supplemental Executive Retirement Plan (SERP) [Member]
Statement [Line Items]
Noncurrent asset	0	0
Current liability	(4,002)	(3,601)
Noncurrent liability	(88,861)	(75,802)
Recognized asset (liability)	(92,863)	(79,403)
Other Postretirement Benefit Plans [Member]
Statement [Line Items]
Current liability	(4,548)	(4,476)
Noncurrent liability	(67,864)	(64,342)
Recognized asset (liability)	(72,412)	(68,818)
U.S. Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities	69.00%	66.00%
U.S. Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
U.S. fixed income	10.00%	19.00%
International Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities	21.00%	15.00%