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Restructuring and Other Charges (Summary of Restructuring Charges) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 11.2	$ 1.0	$ 12.0	$ 3.7
Workforce Restructurings and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 11.2	$ 1.0	$ 12.0	$ 3.7

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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