Restructuring (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 6.3
Restructuring charges	(0.1)	18.5
Restructuring Reserve, Utilization	(2.2)
Restructuring Reserve	4.0	6.3
Prior Restructuring Actions [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges		2.0
Two Thousand Twelve Restructuring Actions [Member]
Restructuring Reserve [Roll Forward]
Reduction of workforce by employees		200
Reduction Of Global Workforce Percentage		2.00%
Repositioning Actions [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges		16.5
Other Restructuring Costs		1.9
Employee Severence and Other [Member] | Repositioning Actions [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges		14.6
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	4.6
Restructuring charges	(0.2)
Restructuring Reserve, Utilization	(1.2)
Restructuring Reserve	3.2
From closure of product lines [Member] | Repositioning Actions [Member]
Restructuring Reserve [Roll Forward]
Inventory Write-down		1.6
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	1.7
Restructuring charges	0.1
Restructuring Reserve, Utilization	(1.0)
Restructuring Reserve	0.8
Contract Termination [Member] | Repositioning Actions [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges		$ 0.5