Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Jan. 01, 2011

Defined Benefit Plan Disclosure [Line Items]

Summary Of Change In Benefit Obligations, Change In Plan Assets And Unfunded Status Of The Two Plans

	December 31,			January 1,
(in millions of U.S. dollars)	2011			2011
Change in Benefit Obligation
Benefit obligation at beginning of year	$	34.5		$	32.3
Service cost		0.5			0.4
Interest cost		1.8			1.8
Plan participant contributions		0.1			0.1
Benefit payments		(0.9	)		(0.6	)
Actuarial losses		3.4			1.6
Translation losses		(0.1	)		(1.1	)
Benefit obligation at end of year	$	39.3		$	34.5
Change in Plan Assets
Plan assets beginning of year	$	26.4		$	23.1
Employer contributions		1.8			1.7
Plan participant contributions		0.1			0.1
Benefit payments		(0.9	)		(0.6	)
Actual return on plan assets		0.2			2.9
Translation losses		(0.1	)		(0.8	)
Fair value at end of year	$	27.5		$	26.4
Funded Status of Plan
Projected benefit obligation	$	(39.3	)	$	(34.5	)
Fair value of plan assets		27.5			26.4
Unfunded status	$	(11.8	)	$	(8.1	)

Schedule Of Components Of Net Periodic Pension Cost

	For the Years Ended
	December 31,			January 1,			January 2,
(in millions of U.S. dollars)	2011			2011			2010
Service cost	$	0.5		$	0.4		$	0.3
Interest cost		1.9			1.8			1.7
Expected return on plan assets		(1.9	)		(1.7	)		(1.2	)
Amortization of prior service costs		0.1			0.1			0.1
Amortization of net loss		0.5			0.5			0.6
Net periodic pension cost	$	1.1		$	1.1		$	1.5

Schedule Of Amounts Included In Accumulated Other Comprehensive Income, Net Of Tax Which Have Not Yet Been Recognized In Net Periodic Benefit Cost

	For the Years Ended
	December 31,			January 1,			January 2,
(in millions of U.S. dollars)	2011			2011			2010
Unamortized prior service benefit	$	(0.4	)	$	(0.5	)	$	(0.6	)
Unrecognized net actuarial gain (loss)		8.5			5.8			(6.9	)
Unamortized prior service benefit (actuarial loss)	$	8.1		$	5.3		$	(7.5	)

Schedule Of Pension Plan Weighted-Average Asset Allocations By Asset Category

	December 31,			January 1,
	2011			2011
U.K. Plan
Equity securities		58.3	%		65.9	%
Debt securities		41.7	%		34.1	%
U.S. Plan
Equity securities		66.9	%		65.3	%
Debt securities		33.1	%		34.7	%

Schedule Of Benefit Payments Expected To Be Paid

(in millions of U.S. dollars)
Expected benefit payments
FY 2012	$	0.9
FY 2013		1.0
FY 2014		1.0
FY 2015		1.0
FY 2016		1.1
FY 2017 through FY 2020		7.2

Schedule Of Fair Values Of Company's Pension Plan Assets

(in millions of U.S. dollars)	December 31, 2011
	Level 1		Level 2		Level 3
Cash and cash equivalents:
Cash and cash equivalents	$	0.1	$	0.1	$	—
Equities:
International mutual funds		14.8		—		—
Index mutual funds		3.1		—		—
U.S. mutual funds		1.5		—		—
Fixed income:
Mutual funds		7.9		—		—
Total	$	27.4	$	0.1	$	—

(in millions of U.S. dollars)	January 1, 2011
	Level 1		Level 2		Level 3
Cash and cash equivalents:
Cash and cash equivalents	$	0.1	$	0.1	$	—
Equities:
International mutual funds		15.9		—		—
Index mutual funds		2.5		—		—
U.S. mutual funds		1.4		—		—
Fixed income:
Mutual funds		6.4		—		—
Total	$	26.3	$	0.1	$	—

Benefit Obligations [Member]

Defined Benefit Plan Disclosure [Line Items]

Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost

	December 31,			January 1,			January 2,
	2011			2011			2010
Discount rate		6.2	%		6.2	%		6.3	%

Net Periodic Benefit Cost [Member]

Defined Benefit Plan Disclosure [Line Items]

Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost

	December 31,			January 1,			January 2,
	2011			2011			2010
U.K. Plan
Discount rate		4.6	%		5.4	%		5.8	%
Expected long-term rate of return on plan assets		5.7	%		6.9	%		7.2	%
U.S. Plan
Discount rate		4.1	%		5.7	%		6.2	%
Expected long-term rate of return on plan assets		7.0	%		7.0	%		7.0	%
Inflation factor		3.3	%		3.7	%		3.7	%