Copal Partners, Purchase Price Allocation (Detail) (Copal Partners, USD $) In Millions, unless otherwise specified	Nov. 04, 2011
Business Acquisition [Line Items]
Current assets	$ 15.5
Property and equipment, net	0.5
Total intangible assets	79.2
Goodwill	136.9
Indemnification asset	18.8
Other assets	6.6
Liabilities assumed	(57.7)
Net assets acquired	199.8
Trade names
Business Acquisition [Line Items]
Total intangible assets	8.6
Client relationships
Business Acquisition [Line Items]
Total intangible assets	66.2
Other intangibles
Business Acquisition [Line Items]
Total intangible assets	$ 4.4