Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2012

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 June 30, 2012
	Canada plans			U.S. plans		U.K. plan			MCI plan		Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	4.1		$	—	$	—		$	0.1	$	4.2
Interest cost	16.6			—		24.8			—		41.4
Expected return on plan assets	(15.2		)	—		(28.5		)	—		(43.7		)
Amortization of prior service cost	0.2			—		—			—		0.2
Amortization of net actuarial loss	5.4			—		4.4			—		9.8
Less expected participant contributions	(0.4		)	—		—			—		(0.4		)
Net periodic pension cost (benefit)	$	10.7		$	—	$	0.7		$	0.1	$	11.5
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)	(0.9		)	—		—			—		(0.9		)
Amortization of net actuarial loss (gain)	(0.1		)	—		—			—		(0.1		)
Net periodic postretirement benefit cost	$	1.5		$	0.1	$	—		$	—	$	1.6

	Thirteen Weeks Ended June 25, 2011
	Canada plans			U.S. plans		U.K. plan			MCI plan		Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	4.8		$	—	$	—		$	—	$	4.8
Interest cost	18.5			0.1		27.5			—		46.1
Expected return on plan assets	(18.8		)	—		(31.9		)	—		(50.7		)
Amortization of prior service cost	0.2			—		—			—		0.2
Amortization of net actuarial loss	2.4			—		2.8			—		5.2
Less expected participant contributions	(0.4		)	—		—			—		(0.4		)
Special termination of benefits	—			—		—			—		—
Net periodic pension cost (benefit)	$	6.7		$	0.1	$	(1.6	)	$	—	$	5.2
Other Postretirement Benefits
Service cost—benefits earned during the period	$	0.5		$	0.1	$	—		—		$	0.6
Interest cost on projected benefit obligation	2.0			—		—			—		2.0
Amortization of prior service cost (gain)	(1.0		)	—		—			—		(1.0		)
Amortization of net actuarial loss	(0.9		)	—		—			—		(0.9		)
Net periodic postretirement benefit cost	$	0.6		$	0.1	$	—		$	—	$	0.7

	Twenty-Six Weeks Ended June 30, 2012
	Canada plans			U.S. plans		U.K. plan			MCI plan		Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	8.2		$	—	$	—		$	0.2	$	8.4
Interest cost	33.2			—		49.3			—		82.5
Expected return on plan assets	(30.5		)	—		(56.7		)	—		(87.2		)
Amortization of prior service cost	0.4			—		—			—		0.4
Amortization of net actuarial loss	10.8			—		8.8			—		19.6
Less expected participant contributions	(0.8		)	—		—			—		(0.8		)
Net periodic pension cost (benefit)	$	21.3		$	—	$	1.4		$	0.2	$	22.9
Other Postretirement Benefits
Service cost—benefits earned during the period	$	1.2		$	0.2	$	—		$	—	$	1.4
Interest cost on projected benefit obligation	3.9			—		—			—		3.9
Amortization of prior service cost (gain)	(1.8		)	—		—			—		(1.8		)
Amortization of net actuarial loss (gain)	(0.2		)	—		—			—		(0.2		)
Net periodic postretirement benefit cost	$	3.1		$	0.2	$	—		$	—	$	3.3

	Twenty-Six Weeks Ended June 25, 2011
	Canada plans			U.S. plans		U.K. plan			MCI plan		Consolidated
	(In millions)
Defined Benefit Plans
Service cost	$	9.5		$	—	$	—		$	—	$	9.5
Interest cost	36.6			0.2		54.4			—		91.2
Expected return on plan assets	(37.4		)	—		(63.1		)	—		(100.5		)
Amortization of prior service cost	0.4			—		—			—		0.4
Amortization of net actuarial loss	4.7			—		5.5			—		10.2
Less expected participant contributions	(0.8		)	—		—			—		(0.8		)
Special termination of benefits	—			—		—			—		—
Net periodic pension cost (benefit)	$	13.0		$	0.2	$	(3.2	)	$	—	$	10.0
Other Postretirement Benefits
Service cost—benefits earned during the period	$	1.0		$	0.2	$	—		—		$	1.2
Interest cost on projected benefit obligation	3.9			—		—			—		3.9
Amortization of prior service cost (gain)	(1.9		)	—		—			—		(1.9		)
Amortization of net actuarial loss	(1.8		)	—		—			—		(1.8		)
Net periodic postretirement benefit cost	$	1.2		$	0.2	$	—		$	—	$	1.4