Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Net periodic pension costs under retirement plans and other post-retirement benefits

Net Periodic Pension and OPEB Cost

	For the Thirteen Weeks Ended
	March 30, 2013									March 31, 2012
	Pension			OPEB			Consolidated			Pension			OPEB			Consolidated
	(In millions)
Components of net periodic pension and OPEB cost:
Service cost - benefits earned during the year	$	4.0		$	0.9		$	4.9		$	4.2		$	0.7		$	4.9
Interest cost on projected benefit obligation	39.4			1.8			41.2			41.1			2.0			43.1
Expected return on plan assets	(44.7		)	—			(44.7		)	(43.5		)	—			(43.5		)
Amortization of prior service cost (benefit)	0.2			(0.9		)	(0.7		)	0.2			(0.9		)	(0.7		)
Amortization of net actuarial loss (gain)	14.3			(0.1		)	14.2			9.8			(0.1		)	9.7
Less: expected participant contributions	(0.3		)	—			(0.3		)	(0.4		)	—			(0.4		)
Net periodic pension and OPEB cost	$	12.9		$	1.7		$	14.6		$	11.4		$	1.7		$	13.1