STOCK-BASED COMPENSATION (Details 3) (Stock Options, USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Stock Options
Vesting period	5 years
Expiration period	10 years
Shares
Outstanding at the beginning of the period (in shares)	24,000,000	30,000,000	36,000,000
Granted (in shares)	332,750	1,000,000	1,000,000
Exercised (in shares)	2,000,000	3,000,000	1,000,000
Forfeited (in shares)	3,900,000	4,000,000	6,000,000
Outstanding at the end of the period (in shares)	18,000,000	24,000,000	30,000,000
Option shares vested and expected to vest at the end of the period	18,000,000	24,000,000	30,000,000
Option shares exercisable at the end of the period	15,000,000	20,000,000	23,000,000
Weighted average exercise price
Outstanding at the beginning of the period (in dollars per share)	$ 22	$ 21	$ 21
Granted (in dollars per share)	$ 22	$ 20	$ 12
Exercised (in dollars per share)	$ 16	$ 12	$ 10
Forfeited (in dollars per share)	$ 28	$ 26	$ 19
Outstanding at the end of the period (in dollars per share)	$ 21	$ 22	$ 21
Option shares vested and expected to vest at the end of the period (in dollars per share)	$ 21	$ 22	$ 21
Option shares exercisable at the end of the period (in dollars per share)	$ 22	$ 24	$ 24
Aggregate intrinsic value
Exercised	$ 22	$ 23	$ 5
Option shares vested and expected to vest at the end of the period	110	109	55
Option shares exercisable at the end of the period	84	62	22
Weighted average remaining option term
Outstanding at the end of the period	4 years	4 years	5 years
Option shares vested and expected to vest at the end of the period	4 years	4 years	5 years
Option shares exercisable at the end of the period	3 years	3 years	4 years
Additional disclosures
Total unrecognized compensation expense	$ 6	$ 9	$ 15
Weighted average remaining vesting period	2 years	2 years	2 years