CONTINGENCIES AND COMMITMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Oct. 01, 2011	Oct. 01, 2011
Loss Contingencies
Attorneys' fees for Mr. Healy (Healy Systems, Inc.) and prejudgment interest		$ 1.2
Commitments for the purchase of machinery and equipment and building expansions	6.4
Product Warranties Disclosures
Standard Product Warranty Description		The Company provides warranties on most of its products. The warranty terms vary but are generally two years from date of manufacture or one year from date of installation.
Extended Product Warranty Description		In 2007, the Company began offering an extended warranty program to certain Water Systems customers which will provide warranty coverage up to five years from the date of manufacture.
Changes in the Carrying Amount of the Warranty Accrual
Warranty Accrual, Beginning Balance		9.4
Accruals related to product warranties		5.6
Reductions for payments made		(5.7)
Warranty Accrual, Ending Balance	9.3	9.3
California Air Resources Board [Member]
Loss Contingencies
Penalties sought		25.0
Sacramento Metropolitan Air Quality Management District (SMAQMD)
Loss Contingencies
Penalties sought		5.0
South Coast Air Quality Management District (SCAQMD)
Loss Contingencies
Penalties sought		12.5
In excess of \| Sta-Rite Industries, LLC and Pentair, Inc.
Loss Contingencies
Penalties sought, per claimant		$ 10.0
Sta-Rite Industries, LLC and Pentair, Inc.
Loss Contingencies
Loss Contingencies Number of Claimants		2

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