Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 24, 2011

Compensation and Retirement Disclosure [Abstract]

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

The net periodic pension costs under retirement plans and other postretirement benefits were as follows:

	Thirteen Weeks Ended September 24, 2011
	Canada plans			U.S. plans			U.K. plan			Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	4.8		$	—		$	—		$	4.8
Interest cost	18.3			(0.2		)	27.2			45.3
Expected return on plan assets	(18.7		)	—			(31.5		)	(50.2		)
Amortization of prior service cost	0.2			—			—			0.2
Amortization of net actuarial loss	2.4			—			2.7			5.1
Less expected participant contributions	(0.4		)	—			—			(0.4		)
Net periodic pension cost (benefit)	$	6.6		$	(0.2	)	$	(1.6	)	$	4.8
Other Postretirement Benefits
Service cost—benefits earned during the period	$	0.6		$	0.1		$	—		$	0.7
Interest cost on projected benefit obligation	1.9			—			—			1.9
Amortization of prior service cost (gain)	(1.0		)	—			—			(1.0		)
Amortization of net actuarial loss (gain)	(0.9		)	—			—			(0.9		)
Net periodic postretirement benefit cost	$	0.6		$	0.1		$	—		$	0.7

	Thirteen Weeks Ended September 25, 2010
	Canada plans			U.S. plans		U.K. plan			Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	4.3		$	—	$	—		$	4.3
Interest cost	17.8			0.1		29.0			46.9
Expected return on plan assets	(17.4		)	—		(27.4		)	(44.8		)
Amortization of prior service cost	0.2			—		—			0.2
Amortization of net actuarial loss	0.3			—		3.1			3.4
Less expected participant contributions	(0.5		)	—		—			(0.5		)
Special termination of benefits	—			—		—			—
Net periodic pension cost (benefit)	$	4.7		$	0.1	$	4.7		$	9.5
Other Postretirement Benefits
Service cost—benefits earned during the period	$	0.6		$	—	$	—		$	0.6
Interest cost on projected benefit obligation	2.3			—		—			2.3
Amortization of prior service cost (gain)	(0.9		)	—		—			(0.9		)
Net periodic postretirement benefit cost	$	2.0		$	—	$	—		$	2.0

	Thirty-Nine Weeks Ended September 24, 2011
	Canada plans		U.S. plans	U.K. plan		Consolidated
	(In millions)
Defined Benefit Plans
Service cost	14.3		—	—		14.3
Interest cost	54.9		—	81.6		136.5
Expected return on plan assets	(56.1	)	—	(94.6	)	(150.7	)
Amortization of prior service cost	0.6		—	—		0.6
Amortization of net actuarial loss	7.1		—	8.2		15.3
Less expected participant contributions	(1.2	)	—	—		(1.2	)
Special termination of benefits	—		—	—		—
Net periodic pension cost (benefit)	19.6		—	(4.8	)	14.8
Other Postretirement Benefits
Service cost—benefits earned during the period	1.6		0.3	—		1.9
Interest cost on projected benefit obligation	5.8		—	—		5.8
Amortization of prior service cost (gain)	(2.9	)	—	—		(2.9	)
Amortization of net actuarial loss (gain)	(2.7	)	—	—		(2.7	)
Net periodic postretirement benefit cost	1.8		0.3	—		2.1

	Thirty-Nine Weeks Ended September 25, 2010
	Canada plans			U.S. plans		U.K. plan			Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	13.0		$	—	$	—		$	13.0
Interest cost	53.6			0.3		86.4			140.3
Expected return on plan assets	(52.4		)	—		(81.7		)	(134.1		)
Amortization of prior service cost	0.6			—		—			0.6
Amortization of net actuarial loss	0.9			—		9.2			10.1
Less expected participant contributions	(1.5		)	—		—			(1.5		)
Special termination benefits	1.8			—		—			1.8
Net periodic pension cost (benefit)	$	16.0		$	0.3	$	13.9		$	30.2
Other Postretirement Benefits
Service cost—benefits earned during the period	$	1.8		$	—	$	—		$	1.8
Interest cost on projected benefit obligation	7.0			—		—			7.0
Amortization of prior service cost (gain)	(2.7		)	—		—			(2.7		)
Net periodic postretirement benefit cost	$	6.1		$	—	$	—		$	6.1