INCENTIVE PLANS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Incentive Plans
Compensation expense relating to stock-based compensation and deferred cash award programs	$ 1,624	$ 1,665	$ 1,630
Amortization of deferred cash awards, deferred cash stock units and performance stock units
Incentive Plans
Compensation expense relating to stock-based compensation and deferred cash award programs	230	198	208
Restricted and deferred stock awards | Retirement-eligible employees
Incentive Plans
Compensation expense relating to stock-based compensation and deferred cash award programs	468	444	338
Restricted and deferred stock awards | Non-retirement-eligible employees
Incentive Plans
Compensation expense relating to stock-based compensation and deferred cash award programs	862	864	871
Stock Option Programs
Incentive Plans
Compensation expense relating to stock-based compensation and deferred cash award programs	10	99	161
Immediately vested stock awards
Incentive Plans
Compensation expense relating to stock-based compensation and deferred cash award programs	$ 54	$ 60	$ 52