Significant Accounting Policies - Summary of Expenses in Special Items (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Disclosure Significant Accounting Policies Summary Of Expenses In Special Items [Abstract]
Impairment/loss on disposal of assets			$ 0.3	$ 0.4
Consulting and professional fees	23.4	19.2	50.3	37.5
Employee severance and retention	6.5	1.0	6.2	4.4
Dedicated project personnel	11.1	3.3	16.5	6.6
Certain R&D agreements	0.8		0.8
Relocated facilities	1.3		2.6
Distributor acquisitions	0.3	0.3	0.3	0.4
Certain litigation matters	21.7	3.5	17.9	9.9
Contract terminations	0.9	1.1	1.4	2.6
Contingent consideration adjustments	5.6		5.9	(0.8)
Accelerated software amortization	1.5	1.5	3.0	1.5
Other	2.5	0.8	3.9	1.7
Special items	$ 75.6	$ 30.7	$ 109.1	$ 64.2