Additions to Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Acquired Finite Lived Intangible Assets [Line Items]
Amount	$ 205.3
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Amount	178.1
Weighted Average Amortization Period	9 years 8 months 12 days
Trade names
Acquired Finite Lived Intangible Assets [Line Items]
Amount	17.7
Weighted Average Amortization Period	10 years
Amount	8.8
Non-compete agreements
Acquired Finite Lived Intangible Assets [Line Items]
Amount	$ 0.7
Weighted Average Amortization Period	3 years