Segment Identifiable Assets (Detail) (USD $) In Thousands	Oct. 01, 2011		Dec. 31, 2010		Oct. 02, 2010
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 4,882,443		$ 3,973,533		$ 3,972,758
Water Group
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,767,632		3,409,556		3,370,351
Technical Products Group
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	743,021		728,969		761,225
Significant Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ (628,210)	[1]	$ (164,992)	[1]	$ (158,818)	[1]

[1] All cash and cash equivalents are included in Other