RETIREMENT AND OTHER BENEFIT PROGRAMS - Additional Information (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation of company's pension plans	$ 3.7	$ 5.4
Allowed variance from target allocation of plan assets	6.50%
General investment portfolio limits on holdings, description	5.00%
Return-Seeking Investments
Defined Benefit Plan Disclosure [Line Items]
Target allocation for plan assets	53.00%
Liability Hedging Investments
Defined Benefit Plan Disclosure [Line Items]
Target allocation for plan assets	47.00%