PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Estimated Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Defined Benefit Pension Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Year One	$ 1,705
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	1,548
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	1,551
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	1,576
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	1,593
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years	8,093
Total	16,066
Other Postretirement Benefit Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Year One	100
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	96
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	92
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	89
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	87
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years	386
Total	$ 850