OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Postretirement and Other Benefits) (Details) - USD ($) $ in Millions		12 Months Ended
	Jul. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Selling, general and administrative expenses		$ 370	$ 394	$ 422
Postemployment Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accounts payable and accrued liabilities		6	7
Other non-current liabilities		42	44
Postretirement Medical and Life Insurance Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accounts payable and accrued liabilities		7	13
Other non-current liabilities		$ 69	$ 112
Discount rate		2.21%	3.00%
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2019		$ 8
2020		7
2021		7
2022		6
2023		6
2024 through 2028		23
Net periodic benefit cost		$ 3	$ 4	$ 5
Discount rate	240.00%	3.00%	4.20%	3.50%
Health care cost trend rates for the next fiscal year		7.50%
Ultimate health care cost trend rate		4.25%