The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

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Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Restructuring and Acquisition-Related Charges - Additional information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended	3 Months Ended		6 Months Ended	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2012	Jun. 30, 2012 Restructuring 2012 Programs Positions	Mar. 31, 2012 Restructuring 2012 Programs Positions	Jun. 30, 2012 Restructuring 2012 Programs	Jun. 30, 2011 Restructuring 2011 Programs Positions	Dec. 31, 2011 Restructuring 2011 Programs Positions
Restructuring Cost and Reserve [Line Items]
Restructuring and acquisition-related charges	$ 27,603,000	$ 21,216,000	$ 53,496,000	$ 48,109,000
Restructuring charges	23,600,000	17,900,000	47,800,000	41,200,000
Acquisition-related charges	4,000,000	3,300,000	5,700,000	6,900,000
Elimination of positions						279	298		205	787
Lease termination costs for facilities	$ 4,600,000	$ 3,800,000	$ 8,300,000	$ 22,400,000
Date of completion of workforce reduction and/or consolidation of facilities					2015			within a year of the start of each program		2012