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Percentage of voting equity interests acquired in the business combination.

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In a business combination achieved in stages, this element represents the acquisition-date percentage of equity in the acquiree held by the acquirer immediately before the acquisition date.

+ References

No definition available.

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- Definition

This item represents the amount of net sales proceeds received on disposal of an equity method investment.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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This item represents the amount of gain (loss) arising from the disposal of an equity method investment.

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No definition available.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Investments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended							1 Months Ended
	Jul. 02, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Apr. 02, 2012	Apr. 04, 2011	Jul. 31, 2009	Dec. 31, 2007	Apr. 30, 2012 Entegris Precision Technologies Corporation
Investment [Line Items]
Equity investments		$ 3.8		$ 2.4
Previously owned equity interest									50.00%
Payment to acquire additional equity interest									3.4
Additional equity interest acquired					50.00%	30.00%	30.00%	40.00%	50.00%
Gains on sale of equity method investments	(0.2)	1.5	0.9
Impairment loss of investment			2.2
Proceeds from sale of equity method investments			$ 0.9