Changes in Level 3 Liabilities (Detail) (Contingent Consideration, USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Liabilities Beginning Balance	$ 51.4		$ 58.6		$ 50.1		$ 56.8
Total (Gains) and Losses:
Included in Earnings	1.3	[1]	(0.7)	[1]	2.6	[1]	0.7	[1]
Included in Other Comprehensive Income			(0.7)	[2]			(0.3)	[2]
Purchases, Issues, Sales, and Settlements
Issues
Settlements
Fair Value Liabilities Ending Balance	52.7		57.2		52.7		57.2
Unrealized (Gain) Losses Included in Earnings Related to Financial Instruments Held at June 30	$ 1.3	[1]	$ (0.7)	[1]	$ 2.6	[1]	$ 0.7	[1]

[1] Gains (losses) are recorded in other operating income (expense) within the consolidated statement of income.

[2] Unrealized foreign currency related losses are included in foreign currency translation adjustments within the consolidated statement of comprehensive income.