EMPLOYEE BENEFIT PLANS (Details 4) (Restricted Stock Units, USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Restricted stock unit activity
Unvested at the beginning of the period (in shares)	2,295,942
Granted (in shares)	1,233,500
Vested (in shares)	(948,539)
Forfeited (in shares)	(157,128)
Unvested at the end of the period (in shares)	2,423,775
Weighted Average Grant Date Fair Value Per Unit
Unvested at the beginning of the period (in dollars per share)	$ 23.40
Granted (in dollars per share)	$ 40.91
Vested (in dollars per share)	$ 24.13
Forfeited (in dollars per share)	$ 29.48
Unvested at the end of the period (in dollars per share)	$ 31.63
Other Disclosures
Granted (in shares)	1,233,500
Vesting period	3 years
Unrecognized compensation costs	$ 57
Period for recognition of unrecognized compensation costs	3 years 1 month 6 days
Chief executive officer
Restricted stock unit activity
Granted (in shares)	212,180
Other Disclosures
Granted (in shares)	212,180
Vesting period	6 years
Percentage of restricted stock units, which will vest three years from the grant date	50.00%
Remaining percentage of restricted stock units, which will vest thereafter three years from the grant date	50.00%
Time-vesting
Restricted stock unit activity
Granted (in shares)	815,262	1,535,187
Other Disclosures
Restricted stock that will vest and be settled over a three-year period from the grant date (in shares)	735,129
Restricted stock that will vest and be settled on the fifth anniversary of the grant date (in shares)	80,133
Percentage of restricted stock units, which will vest on the fifth anniversary of the grant date	100.00%
Granted (in shares)	815,262	1,535,187
Vesting period	3 years	3 years
Time-vesting | Chief executive officer
Restricted stock unit activity
Granted (in shares)	106,090
Other Disclosures
Granted (in shares)	106,090
Performance-based vesting
Restricted stock unit activity
Granted (in shares)	206,058	116,250
Other Disclosures
Granted (in shares)	206,058	116,250
Vesting period	3 years	3 years
Performance-based vesting | Chief executive officer
Restricted stock unit activity
Granted (in shares)	106,090
Other Disclosures
Granted (in shares)	106,090
Additional award to be granted (in shares)	106,090