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Equity Method Investment - Additional Information (Detail) (Hirschmann JV [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Hirschmann JV [Member]
Income Loss From Equity Method Investments [Line Items]
Ownership percentage	50.00%
Carrying value recorded in other long-lived assets	$ 35.4	$ 37.7
Sales to the Hirschmann JV	5.7	19.4	11.9
Dividend received from the Hirschmann JV	12.5	10.9	6.4
Receivables from Hirschmann JV	$ 2.4	$ 3.6

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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