VAT TAX ISSUE IN BRAZIL (Details) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended
	Oct. 31, 2010 USD ($)	Oct. 31, 2010 BRL	Apr. 30, 2011 USD ($)	Apr. 30, 2011 BRL		Apr. 30, 2011 Original Claim 2004-2006 [Member] USD ($)	Apr. 30, 2011 Original Claim 2004-2006 [Member] BRL		Apr. 30, 2011 Preacquisition 2007-April 2008 [Member] USD ($)	Apr. 30, 2011 Preacquisition 2007-April 2008 [Member] BRL		Apr. 30, 2011 Postacquisition May 2008-April 2009 [Member] USD ($)	Apr. 30, 2011 Postacquisition May 2008-April 2009 [Member] BRL		Apr. 30, 2011 Escrow Released [Member] USD ($)	Apr. 30, 2011 Escrow Released [Member] BRL		Apr. 30, 2011 Charged To Expense [Member] USD ($)	Apr. 30, 2011 Charged To Expense [Member] BRL
Total Paid Or To Be Paid Into Government Under Amnesty Program			$ 5.0	9.2		$ 1.9	3.5		$ 1.3	2.4		$ 1.8	3.3		$ 0.5	1.0		$ 0	0
Total Not Available For Credit			2.1	3.8	[1]	0.8	1.4	[1]	0.5	1.0	[1]	0.8	1.4	[1]	0.5	1.0	[1]	1.6	2.8	[1]
Available For Credit	$ 1.9	3.4	$ 2.9	5.4	[2]	$ 1.1	2.1	[2]	$ 0.8	1.4	[2]	$ 1.0	1.9	[2]	$ 0	0	[2]	$ 0	0	[2]

[1] Essentially represents the discount originally offered as incentive by the neighboring state.

[2] The amount allowed as credit against future payments represents the VAT taxes actually previously paid to the neighboring state.