Schedule Of Change In Balance Sheet Position Of Restructuring Reserves (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	$ 79.0	$ 32.3	$ 48.6
Provision/ Charge	0.1	48.1	10.9
Provision/ Reversal	(0.1)	(0.1)	(4.9)
Cash payments	(7.9)	(3.1)	(22.3)
Translation difference	(3.7)	1.8	0
Restructuring reserve, ending balance	67.4	79.0	32.3
Restructuring Employee-Related
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	78.1	31.4	48.4
Provision/ Charge	0.1	48.1	10.1
Provision/ Reversal	(0.1)	(0.1)	(4.9)
Cash payments	(7.8)	(3.1)	(22.2)
Translation difference	(3.7)	1.8	0
Restructuring reserve, ending balance	66.6	78.1	31.4
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.9	0.9	0.2
Provision/ Charge			0.8
Cash payments	(0.1)		(0.1)
Translation difference	0	0
Restructuring reserve, ending balance	$ 0.8	$ 0.9	$ 0.9