EMPLOYEE BENEFIT PLANS (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock option activity
Outstanding at the end of the period (in shares)	4,289,192
Stock Options
Stock option activity
Outstanding at the beginning of the period (in shares)	8,498,393	10,788,887	12,079,314
Granted (in shares)	477,500	0	241,002
Exercised (in shares)	(3,657,127)	(629,021)	(520,495)
Forfeited/Expired (in shares)	(1,029,574)	(1,661,473)	(1,010,934)
Outstanding at the end of the period (in shares)	4,289,192	8,498,393	10,788,887
Vested and expected to vest at the end of the period (in shares)	4,284,062
Exercisable at the end of the period (in shares)	3,815,870
Weighted Average Exercise Price Per Share
Outstanding at the beginning of the period (in dollars per share)	$ 25.04	$ 39.88	$ 42.32
Granted (in dollars per share)	$ 22.79		$ 20.12
Exercised (in dollars per share)	$ 5.77	$ 5.24	$ 4.84
Forfeited/Expired (in dollars per share)	$ 69.72	$ 128.92	$ 82.48
Outstanding at the end of the period (in dollars per share)	$ 30.49	$ 25.04	$ 39.88
Vested and expected to vest at the end of the period (in dollars per share)	$ 30.50
Exercisable at the end of the period (in dollars per share)	$ 31.47
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 34
Vested and expected to vest at the end of the period	34
Exercisable at the end of the period	29
Weighted Average Remaining Life
Outstanding at the end of the period	4 years 1 month 6 days
Vested and expected to vest at the end of the period	4 years 1 month 6 days
Exercisable at the end of the period	3 years 6 months
Other Disclosures
Aggregate Intrinsic Value of awards exercised	71	14
Unrecognized compensation costs	$ 4
Period for recognition of unrecognized compensation costs	2 years 1 month 6 days
Vesting period	3 years
Weighted average estimated fair value of awards granted (in dollars per share)	$ 12.05
Stock Options | Top Employees
Assumptions used to calculate fair value of awards granted to top eleven employees
Expected volatility (as a percent)	52.00%
Expected dividend yield (as a percent)	0.00%
Expected life	6 years 10 months 24 days
Expected forfeiture rate (as a percent)	2.00%
Early exercise threshold gain (as a percent)	70.00%
Early exercise rate, gain (as a percent)	20.00%
Stock Options | Top Employees | Low end of range
Assumptions used to calculate fair value of awards granted to top eleven employees
Risk-free interest rate (as a percent)	1.06%
Stock Options | Top Employees | High end of range
Assumptions used to calculate fair value of awards granted to top eleven employees
Risk-free interest rate (as a percent)	1.41%
Stock options subject to time-vesting
Stock option activity
Granted (in shares)	257,500
Performance-based stock options
Stock option activity
Granted (in shares)	220,000
Other Disclosures
Vesting period	3 years