Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	1 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Jul. 01, 2012	Jul. 01, 2012 Thermax and Raydex [Member]	Jul. 01, 2012 Thermax and Raydex [Member]	Jun. 30, 2013 Trapeze [Member]	Dec. 31, 2010 Trapeze [Member]	Jun. 30, 2013 Standby letters of credit [Member]	Jun. 30, 2013 Bank guaranties [Member]	Jun. 30, 2013 Surety bonds [Member]
Loss Contingencies [Line Items]
Reporting Period	91 days	90 days	181 days	183 days
Fair value measurements, transfers between Level 1 and Level 2	$ 0		$ 0	$ 0
Original maturity period of cash and cash equivalents	Three months or less
Fair value of cash and cash equivalents based on quoted market prices in active markets Level 1 valuation	260.5		260.5
Contingency accrual at carrying value									7.0	4.7	1.7
Operating results from discontinued operations					25.8	50.5
Income before taxes from discontinued operations					5.3	12.1
Proceeds from the sales of Trapeze								152.1
Amount received in cash at the end of transaction								136.9
Amount in escrow as partial security for Company's indemnity obligations under transaction's purchase and sale agreement								15.2
Amount collected from escrow							4.2
Escrow receivable							$ 3.8