EMPLOYEE STOCK BENEFIT PLANS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 40	$ 43	$ 82	$ 81
Deferred tax benefit related to stock-based compensation expense	14	15	28	28
Stock Options [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2	7	5	13
Unrecognized compensation cost	6		6
Share based compensation awards, vesting period in years			0.7
Restricted Stock [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	18	22	37	40
Number of shares granted			2.9
Weighted average grant date fair value of grants during the period			$ 32.65
Vesting period of stock-based compensation award, in years			4
Unrecognized compensation cost	184		184
Share based compensation awards, vesting period in years			2.9
Market share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	7	5	13	11
Number of shares granted			1.1
Weighted average grant date fair value of grants during the period			$ 31.85
Vesting period of stock-based compensation award, in years			4
Unrecognized compensation cost	46		46
Share based compensation awards, vesting period in years			3.1
Long term performance awards [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	13	9	27	17
Number of shares granted			1.7
Weighted average grant date fair value of grants during the period			$ 32.33
Vesting period of stock-based compensation award, in years			3
Unrecognized compensation cost	$ 55		$ 55
Share based compensation awards, vesting period in years			1.5