Changes in Carrying Amount of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Beginning Balance	$ 2,066,044	$ 2,088,797
Acquisitions/ Divestitures	466,182
Foreign Currency Translation/Other	(258,308)	(22,753)
Ending Balance	2,273,918	2,066,044
Water & Fluid Solutions
Goodwill [Line Items]
Beginning Balance	1,784,100	1,802,913
Acquisitions/ Divestitures	466,182
Foreign Currency Translation/Other	(255,501)	(18,813)
Ending Balance	1,994,781	1,784,100
Technical Products
Goodwill [Line Items]
Beginning Balance	281,944	285,884
Foreign Currency Translation/Other	(2,807)	(3,940)
Ending Balance	$ 279,137	$ 281,944

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details