Amount of potential cash payments that could result from the contingent consideration arrangement.

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Other Income, net - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Sep. 30, 2012	Sep. 30, 2011
Patent litigation settlement gain			$ 7.5			$ 7.5
Aggregate Cash Received					15.6
Litigation settlement gain				14.7	14.7
Discount rate					4.00%
Other income	8.2	21.1			40.1	46.7
Minimum [Member]
Potential additional cash consideration related to the components products segments	0				0
Maximum [Member]
Potential additional cash consideration related to the components products segments	$ 1.5				$ 1.5