Assets and Liabilities Measured at Fair Value (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jul. 02, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accumulated goodwill impairment losses	$ 200.5	$ 200.5	$ 0
Water & Fluid Solutions | Residential Filtration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accumulated goodwill impairment losses		$ 200.5