POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - TOTAL BENEFIT PAYMENTS EXPECTED TO BE PAID (Details) $ in Millions	Jun. 30, 2023 USD ($)
Pension Plan
EXPECTED BENEFIT PAYMENTS
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 648
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	633
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	632
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	652
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	704
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	3,800
Other Retiree Benefits
EXPECTED BENEFIT PAYMENTS
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	179
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	186
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	189
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	196
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	202
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 1,102