PENSION AND OTHER POST-EMPLOYMENT BENEFIT PLANS - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended			11 Months Ended	12 Months Ended
	Dec. 31, 2021	Oct. 31, 2019	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Employer contributions and benefit payments					$ 27	$ 27	$ 25
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate			4.40%	4.30%
Defined Benefit Plan, Net effect of remeasurement reduction in funded status							$ 24
U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate			4.40%				4.30%
U.S. Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan						(800)	$ (1,500)
Payment for pension benefits					30
Qualified and Registered Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, private equity and hedge fund investments to a third party	$ 189
Registered Pension Plans | Canada
Defined Benefit Plan Disclosure [Line Items]
Employer contributions and benefit payments					2
Expected contribution to benefit plans during 2022	2				2
Non Registered Plans | Canada
Defined Benefit Plan Disclosure [Line Items]
Employer contributions and benefit payments					2
Expected contribution to benefit plans during 2022	3				3
Non Qualified Pension Plans Defined Benefit | U.S.
Defined Benefit Plan Disclosure [Line Items]
Employer contributions and benefit payments					16
Expected contribution to benefit plans during 2022	13				$ 13
Pension
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Payment for Settlement		$ 6				253	$ 449
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate					2.50%
Employer contributions and benefit payments					$ 50	$ 21
Pension | Canada
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate					2.50%	3.10%	3.70%
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate					2.50%	3.40%	4.30%
Other Post-employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate						3.00%
Employer contributions and benefit payments					$ 9	$ 8
Expected contribution to benefit plans during 2022	12				12
Other Post-employment Benefits | Collective Bargaining Arrangement
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to benefit plans during 2022	$ 4				$ 4
Other Post-employment Benefits | Canada
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate					2.40%	3.00%	3.70%
Employer contributions and benefit payments					$ 2
Other Post-employment Benefits | U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate					2.10%	3.00%	4.20%
Employer contributions and benefit payments					$ 7