FAIR VALUE MEASUREMENTS (Details 10) (Fair value on a non-recurring basis, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Alternative investments	Mar. 31, 2012 Alternative investments	Mar. 31, 2013 Other assets	Mar. 31, 2012 Other assets	Mar. 31, 2013 Level 2	Dec. 31, 2012 Level 2	Mar. 31, 2013 Level 2 Other assets	Dec. 31, 2012 Level 2 Other assets	Mar. 31, 2013 Level 3	Dec. 31, 2012 Level 3	Mar. 31, 2013 Level 3 Alternative investments	Dec. 31, 2012 Level 3 Alternative investments	Mar. 31, 2013 Level 3 Other assets	Dec. 31, 2012 Level 3 Other assets	Mar. 31, 2013 Total Fair Value	Dec. 31, 2012 Total Fair Value	Mar. 31, 2013 Total Fair Value Alternative investments	Dec. 31, 2012 Total Fair Value Alternative investments	Mar. 31, 2013 Total Fair Value Other assets	Dec. 31, 2012 Total Fair Value Other assets
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis							$ 8	$ 3	$ 8	$ 3	$ 1,850	$ 2,080	$ 1,843	$ 2,062	$ 7	$ 18	$ 1,858	$ 2,083	$ 1,843	$ 2,062	$ 15	$ 21
Impairment Charges	$ 92	$ 101	$ 79	$ 93	$ 13	$ 8