Annual report pursuant to Section 13 and 15(d)

Estimated Fair Value of Net Assets Acquired and Liabilities Assumed at Acquisition Dates (Detail)

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Estimated Fair Value of Net Assets Acquired and Liabilities Assumed at Acquisition Dates (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]    
Current assets $ 14.1 $ 6.0
Property and equipment 4.2 0.3
Other assets 0.1 0.6
Identifiable intangible assets 52.2 [1] 30.6 [1]
Goodwill 75.6 [2] 47.5 [2]
Total assets acquired 146.2 85.0
Total liabilities assumed (13.8) (8.0)
Non-controlling interest   (0.4)
Net assets acquired $ 132.4 $ 76.6
[1] Identifiable intangible assets are further disaggregated in the following table.
[2] Of the goodwill resulting from 2011 and 2010 acquisitions, $44.7 million and $4.4 million, respectively, is tax deductible.