Expenses in the Special Items (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Business And Significant Accounting Policies [Line Items]
Impairment/loss on disposal of assets	$ 0.3	$ 0.3	$ 0.7	$ 3.2
Consulting and professional fees	25.6	3.2	63.1	11.6
Employee severance and retention	1.8	1.1	6.2	20.9
Dedicated project personnel	3.9	0.7	10.5	1.6
Distributor acquisitions		0.5	0.4	1.6
Certain litigation matters	3.3		13.2	0.1
Contract terminations	2.0	1.8	4.6	4.5
Contingent consideration adjustments	(2.0)		(2.8)
Accelerated software amortization	1.5		3.0
Other	0.5	0.4	2.2	3.5
Special items	$ 36.9	$ 8.0	$ 101.1	$ 47.0