Amortizable Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified											6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Trade Names	Dec. 31, 2011 Trade Names	Jun. 30, 2012 Customer Relationships	Dec. 31, 2011 Customer Relationships	Jun. 30, 2012 Patents	Dec. 31, 2011 Patents	Jun. 30, 2012 Noncompete Agreements	Dec. 31, 2011 Noncompete Agreements	Jun. 30, 2012 Minimum Trade Names	Jun. 30, 2012 Minimum Customer Relationships	Jun. 30, 2012 Minimum Patents	Jun. 30, 2012 Minimum Noncompete Agreements	Jun. 30, 2012 Maximum Trade Names	Jun. 30, 2012 Maximum Customer Relationships	Jun. 30, 2012 Maximum Patents	Jun. 30, 2012 Maximum Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 414.9	$ 415.1	$ 116.7	$ 116.9	$ 253.8	$ 253.8	$ 43.0	$ 43.0	$ 1.4	$ 1.4
Accumulated Amortization	(163.3)	(151.6)	(64.0)	(61.3)	(71.3)	(64.3)	(26.7)	(24.8)	(1.3)	(1.2)
Net	$ 251.6	$ 263.5	$ 52.7	$ 55.6	$ 182.5	$ 189.5	$ 16.3	$ 18.2	$ 0.1	$ 0.2
Amortization Period (Years)											3 years	15 years	4 years	5 years	20 years	20 years	20 years	10 years