INCENTIVE PLANS - Incentive Compensation Cost (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of shares available for grant (in shares)	42.3
Incentive compensation cost	$ 2,130	$ 2,105	$ 2,091
Immediately vested stock award
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	130	127	101
Amortization of deferred cash awards, deferred cash stock units and performance stock units
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	186	340	463
Other variable incentive compensation
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	355	286	304
Charges for estimated awards to retirement-eligible employees | Restricted and deferred stock awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	741	663	742
Amortization of restricted and deferred stock awards | Restricted and deferred stock awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	$ 718	$ 689	$ 533