Amortizable Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified											3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Trade Names	Dec. 31, 2012 Trade Names	Mar. 31, 2013 Customer Relationships	Dec. 31, 2012 Customer Relationships	Mar. 31, 2013 Patents	Dec. 31, 2012 Patents	Mar. 31, 2013 Noncompete Agreements	Dec. 31, 2012 Noncompete Agreements	Mar. 31, 2013 Minimum Trade Names	Mar. 31, 2013 Minimum Customer Relationships	Mar. 31, 2013 Minimum Patents	Mar. 31, 2013 Minimum Noncompete Agreements	Mar. 31, 2013 Maximum Trade Names	Mar. 31, 2013 Maximum Customer Relationships	Mar. 31, 2013 Maximum Patents	Mar. 31, 2013 Maximum Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 508.1	$ 509.3	$ 130.7	$ 131.1	$ 333.0	$ 333.8	$ 43.0	$ 43.0	$ 1.4	$ 1.4
Accumulated Amortization	(185.5)	(178.2)	(68.6)	(67.1)	(86.0)	(81.1)	(29.6)	(28.7)	(1.3)	(1.3)
Net	$ 322.6	$ 331.1	$ 62.1	$ 64.0	$ 247.0	$ 252.7	$ 13.4	$ 14.3	$ 0.1	$ 0.1
Amortization Period (Years)											3 years	15 years	4 years	5 years	20 years	20 years	20 years	10 years