INCOME TAXES - Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]
Balance at beginning of year	$ 251	$ 180
Additions based on tax positions related to current year	0	1
Additions for tax positions of prior years	2	91
Reductions for tax positions of prior years	(21)	(11)
Foreign currency translation	0	(2)
Settlements	(53)	(2)
Lapse of statute	(2)	(6)
Balance at end of year	$ 177	$ 251