INCENTIVE PLANS - Incentive Compensation Cost (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Number of shares available for grant (in shares)	48.0
Incentive compensation cost	$ 2,143	$ 2,120	$ 2,091
Immediately vested stock award
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	101	99	95
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	463	384	201
Other variable incentive compensation
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incentive compensation cost	304	435	627
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	742	807	748
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	$ 533	$ 395	$ 420