Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Net sales	$ 505.4	$ 557.4	$ 615.7	$ 522.8	$ 535.2	$ 551.8	$ 564.9	$ 488.6	$ 2,201.3		$ 2,140.5		$ 1,899.3
Operating earnings (loss)	15.2	33.8	53.7	24.9	26.4	14.0	20.8	1.9	127.6		63.1		70.6
Interest expense									(96.5)		(105.6)		(95.7)
Loss from debt retirement									(6.4)		(33.8)		0
Investment income									0.1		0.1		0.1
Earnings (loss) before provision (benefit) for income taxes									24.8		(76.2)		(25.0)
Depreciation expense	9.5	10.3	9.4	9.3	10.8	10.2	9.9	10.3	38.5		41.2		42.5
Amortization expense	11.5	11.4	11.3	11.0	11.3	11.2	11.0	19.2	45.2		52.7		49.2
Capital Expenditures									25.0		21.1		19.8
Restructuring charges									9.1
Non-cash share-based compensation expense									4.6		1.7		2.8
Capital lease incurred									0.9		0		0
Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating earnings (loss)									172.0		103.6		97.5
RESV [Member]
Segment Reporting Information [Line Items]
Net sales									598.3		591.2		602.7
Operating earnings (loss)									73.3	[1]	32.6	[1]	56.1	[1]
Depreciation expense									13.7		13.6		16.2
Amortization expense									15.3	[2]	15.3	[2]	18.4	[2]
Capital Expenditures									5.7		4.9		5.9
Restructuring charges	1.7				13.5				1.8		16.9
Product liability accrual, period increase (decrease)	(9.4)				(7.9)						(8.2)
Net foreign exchange gain (loss)									3.5
Product warranty accrual, period increase (decrease)													(4.1)
Product warranty expense													1.9
Inventory, allocation adjustment													1.4
TECH [Member]
Segment Reporting Information [Line Items]
Net sales									422.7		455.2		396.9
Operating earnings (loss)									14.2	[3]	35.4	[3]	10.7	[3]
Depreciation expense									4.4		5.4		5.6
Amortization expense									10.2	[4]	10.1	[4]	17.5	[4]
Capital Expenditures									4.2		3.4		3.2
Restructuring charges											1.2		4.5
Product warranty expense											4.9
Inventory and severance costs									6.1
Inventory write-down									3.7
Gain contingency, recognized in period													3.0
Inventory, allocation adjustment											0.2		8.4
DMS [Member]
Segment Reporting Information [Line Items]
Net sales									284.6		280.6		66.7
Operating earnings (loss)									33.1		22.2		1.4
Depreciation expense									5.3		4.0		0.3
Amortization expense									12.1	[5]	20.2	[5]	0.9	[5]
Capital Expenditures									4.5		5.1		0.1
Inventory, allocation adjustment											7.3		0.9
RHC [Member]
Segment Reporting Information [Line Items]
Net sales									381.8		378.6		470.5
Operating earnings (loss)									8.5	[6]	1.4	[6]	23.6	[6]
Depreciation expense									8.9		11.6		14.4
Amortization expense									1.7	[7]	1.2	[7]	1.7	[7]
Capital Expenditures									1.4		2.6		3.0
Product liability accrual, period increase (decrease)									(1.2)		1.7
Inventory, allocation adjustment									0.9		0.4		0.8
CES [Member]
Segment Reporting Information [Line Items]
Net sales									513.9		434.9		362.5
Operating earnings (loss)									42.9	[8]	12.0	[8]	5.7	[8]
Depreciation expense									6.0		6.4		5.8
Amortization expense									5.9	[9]	5.9	[9]	10.7	[9]
Capital Expenditures									6.5		5.0		7.3
Restructuring charges									1.2
Product liability accrual, period increase (decrease)											(1.0)
Product warranty accrual, period increase (decrease)													(0.7)
Inventory, allocation adjustment													0.7
Corporate [Member]
Segment Reporting Information [Line Items]
Operating earnings (loss)									0		(8.7)		0
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Operating earnings (loss)									(44.4)	[10]	(31.8)	[10]	(26.9)	[10]
Depreciation expense									0.2		0.2		0.2
Amortization expense									0		0		0
Capital Expenditures									2.7	[11]	0.1	[11]	0.3	[11]
Gain contingency, recognized in period													2.7
Transition Costs									6.8
Non-cash share-based compensation expense									3.4				2.0
Professional Fees									1.8		1.4
Fees and expenses													2.2
Capital lease incurred									0.9
Unallocated Amount to Segment [Member] | Chief Executive Officer [Member]
Segment Reporting Information [Line Items]
Transition Costs											$ 0.8

[1] In 2012, includes (1) approximately $1.8 million (of which approximately $1.7 million was recorded during the fourth quarter of 2012) of contractual termination benefits and other charges relating to exit and disposal activities and (2) a decrease in product liability expense of approximately $9.4 million as compared to 2011 as a result of favorable settlement of claims primarily in 2012, and (3) a decrease in net foreign exchange losses of approximately $3.5 million related to transactions, including intercompany debt not indefinitely invested in the Company's subsidiaries as compared to 2011. In 2011, includes (1) approximately $16.9 million (of which approximately $13.5 million was recorded during the fourth quarter of 2011) of severance and other charges relating to exit and disposal activities and (2) a decrease in product liability expense of approximately $8.2 million (of which approximately $7.9 million occurred in the fourth quarter of 2011) as compared to 2010 as a result of favorable settlement of claims primarily in the fourth quarter of 2011. In 2010, includes a reduction in warranty reserves of approximately $4.1 million due to the Company's change in estimate of expected warranty claims and a charge of approximately $1.9 million related to a product safety upgrade program.

[2] Includes amortization of excess purchase price allocated to inventory recorded as a non-cash charge to cost of products sold of approximately $1.4 million for 2010.

[3] For 2012, includes approximately $6.1 million of costs and expenses related to inventory reserves and one time termination benefits in conjunction with combining certain subsidiaries within the segment and a charge of approximately $3.7 million relating to the decision to discontinue development of a certain new product within the segment. In 2011, includes approximately $1.2 million of severance and other charges relating to exit and disposal activities and approximately $4.9 million of additional warranty expense related to a certain customer. In 2010, includes approximately $4.5 million of severance and other charges related to the closure of certain facilities and a gain of approximately $3.0 million related to the reversal of a loss contingency reserve that was previously provided in 2009 related to one of the Company's subsidiaries.

[4] Includes amortization of excess purchase price allocated to inventory recorded as a non-cash charge to cost of products sold of approximately $0.2 million and $8.4 million for 2011 and 2010, respectively.

[5] Includes amortization of excess purchase price allocated to inventory recorded as a non-cash charge to cost of products sold of approximately $7.3 million and $0.9 million for 2011 and 2010, respectively.

[6] For 2012, includes a decrease in product liability expense of approximately $1.2 million as compared to the same period of 2011 as a result of favorable claims settlement during 2012. In 2011, includes an increase in product liability expense of approximately $1.7 million as compared to 2010 resulting from the favorable settlement of claims that occurred in 2010.

[7] Includes amortization of excess purchase price allocated to inventory recorded as a non-cash charge to cost of products sold of approximately $0.9 million, $0.4 million and $0.8 million for 2012, 2011 and 2010, respectively.

[8] For 2012, includes costs of approximately $1.2 million relating to the relocation of equipment to a new facility. In 2011, includes a decrease of approximately $1.0 million in product liability expense as compared to 2010 primarily as a result of the favorable settlement of claims. In 2010, includes a reduction in warranty reserves of approximately $0.7 million due to the Company's change in estimate of expected warranty claims.

[9] Includes amortization of excess purchase price allocated to inventory recorded as a non-cash charge to cost of products sold of approximately $0.7 million for 2010.

[10] For 2012, includes (1) approximately $6.8 million related to operational improvement initiatives, including certain staff additions, outside consulting fees related to certain strategic reviews and other costs, (2) approximately $3.4 million of share-based compensation expense, and (3) approximately $1.8 million of outside consulting fees relating to strategic reviews. In 2011, includes approximately $0.8 million of CEO transition expenses and approximately $1.4 million of outside consulting fees relating to strategic reviews. In 2010, includes non-cash share-based compensation expense of approximately $2.0 million, a gain of approximately $2.7 million relating to the reversal of a portion of a loss contingency reserve provided in prior periods, and approximately $2.2 million of fees and expenses associated with the acquisition of Ergotron.

[11] Includes capital expenditures financed under capital leases of approximately $0.9 million for 2012.