CONTINGENCIES (Environmental Obligations) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) project state	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2017 USD ($) divisions site	Sep. 29, 2021 divisions
Site Contingency [Line Items]
Number of remediation projects | project	100
Number of US States with remediation projects | state	24
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 1,664	$ 1,584	$ 1,561
Accretion Expense	110	104	102
Additionsb	57	60	38
Reductions	(14)	(20)	(58)
Spending	(77)	(64)	(59)
Balance at end of year	1,740	1,664	1,584
Less current portion	(125)	(64)	(83)
Long-term portion	1,615	$ 1,600	1,501
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]
2022	125
2023	120
2024	93
2025	100
2026	97
Thereafter	3,200
Estimated environmental obligations on a discounted basis	1,600
Estimated environmental obligations on an undiscounted and unescalated	$ 3,700
Environmental Loss Contingency, Number of Uranium Sites on Tribal Lands | divisions				94	23
Remediation work related to Uranium mines, amount to be contributed by the U.S. Government				$ 335
Uranium mine remediation work, program term, in years				20 years
Reduction of environmental obligation due to deceleration of work cause by COVID-19			$ 47
Number of site surveys being performed to mining claims | site				15,000
Active remediation projects, percent	60.00%
Minimum
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]
Estimated environmental obligations on an undiscounted and unescalated	$ 3,300
Maximum
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]
Estimated environmental obligations on an undiscounted and unescalated	4,100
Pinal Creek, AZ; Newtown Creek, NY; Smelter Sites in Arizona, Indiana, Kansas, Missouri, New Jersey, Oklahoma, Pennsylvania; and Uranium Mining in Wester United States
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at end of year	1,500
Newtown Creek
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at end of year	338
Sixty Percent of Remediation Projects
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at end of year	20
Pinal Creek, AZ
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at end of year	437
Historical Smelter Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at end of year	268
Uranium Mining Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at end of year	$ 439