Registration of securities issued in business combination transactions

ASSET RETIREMENT OBLIGATIONS (Details)

v2.4.0.6
ASSET RETIREMENT OBLIGATIONS (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Changes to asset retirement obligation liabilities    
Asset retirement obligation at beginning of year $ 26 $ 24
Accretion expense 2 2
Liabilities incurred 2  
Liabilities assumed in connection with consolidation of a variable interest entity   2
Liabilities settled (3) (1)
Foreign currency effect on reserve balance 1 (1)
Asset retirement obligation at end of year $ 28 $ 26