Postretirement benefits other than pension (Tables) (Other Postretirement Benefit Plans, Defined Benefit [Member])

6 Months Ended

Jun. 24, 2012

Other Postretirement Benefit Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Postretirement benefit costs for health care and life insurance

Postretirement benefit costs for health care and life insurance are presented in the following table:

(in thousands of dollars)
	Thirteen Weeks Ended						Twenty-six Weeks Ended
	Jun. 24, 2012			Jun. 26, 2011			Jun. 24, 2012			Jun. 26, 2011
Service cost-benefits earned during the period	$	98		$	130		$	273		$	305
Interest cost on net benefit obligation		1,822			2,227			3,872			4,602
Amortization of prior service credit		(4,795	)		(4,880	)		(9,595	)		(9,755	)
Amortization of actuarial loss		322			1,522			972			2,722
Net periodic postretirement benefit credit	$	(2,553	)	$	(1,001	)	$	(4,478	)	$	(2,126	)