|
INCOME TAXES (Details) (Brazil, USD $)
In Millions, unless otherwise specified |
Mar. 31, 2012
Income tax examination from 2008 to 2009
subsidiary
|
Dec. 31, 2011
Income tax examination from 2005 to 2009
subsidiary
|
Dec. 31, 2011
Income tax examination from 2005 to 2007
|
Dec. 31, 2010
Income tax examination from 2005 to 2007
subsidiary
|
|---|---|---|---|---|
| Income Tax Examination [Line Items] | ||||
| Number of subsidiaries under tax examination | 1 | 1 | 1 | |
| Total proposed adjustments | $ 62 | $ 160 | $ 525 | |
| The dismissal of a portion of 2010 Brazilian IRS proposed tax adjustments | $ 170 |