Changes in Redeemable Noncontrolling Interest Related to Acquisition (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2012		Dec. 31, 2011
Redeemable Noncontrolling Interest [Line Items]
Beginning balance	$ 60.5
Fair value at date of acquisition			68.0
Adjustment due to right of offset for UTPs	6.8	[1]	(6.8)	[1]
Net earnings	2.6		1.0
FX translation	1.6		(1.7)
Ending balance	69.2		60.5
Redeemable Noncontrolling Interests
Redeemable Noncontrolling Interest [Line Items]
Distributions	$ (2.3)

[1] Relates to an adjustment for the right of offset pursuant to the Copal acquisition agreement whereby the amount due to the sellers under the put/call arrangement is reduced by the amount of UTPs that the Company may be required to pay. See Note 8 for further detail on this arrangement.