PENSION AND OTHER POST-EMPLOYMENT BENEFIT PLANS - Funded Status of Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation at beginning of year	$ 3,971	$ 4,260
Service cost	42	36	$ 32
Interest cost	98	139	160
Actuarial (gains) losses	(206)	540
Plan participants’ contributions	0	0
Benefits paid, including lump sum and annuity transfers	(199)	(1,025)
Other, including foreign currency translation	2	21
Projected benefit obligation at end of year	3,708	3,971	4,260
Fair value of plan assets at beginning of year (estimated)	3,230	3,719
Actual return on plan assets(2)	336	490
Employer contributions and benefit payments	50	21
Plan participants’ contributions	0	0
Benefits paid, including lump sum and annuity transfers	(199)	(1,025)
Other, including foreign currency translation	1	25
Fair value of plan assets at end of year (estimated)	3,418	3,230	3,719
Noncurrent assets	52	58
Current liabilities	(16)	(17)
Noncurrent liabilities	(326)	(782)
Funded status	(290)	(741)
Accumulated benefit obligation at end of year	$ 3,601	$ 3,855
Discount rate		2.50%
Lump sum or installment distributions election	60.00%	60.00%
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.90%	2.50%
Pension | Canada
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.10%	2.50%
Pension | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.90%
Rate of compensation increase	2.00%	2.00%
Pension | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.10%
Rate of compensation increase	13.00%	13.00%
Other Post-employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation at beginning of year	$ 149	$ 151
Service cost	0	0	0
Interest cost	3	4	6
Actuarial (gains) losses	(9)	5
Plan participants’ contributions	2	2
Benefits paid, including lump sum and annuity transfers	(13)	(14)
Other, including foreign currency translation	(1)	1
Projected benefit obligation at end of year	131	149	151
Fair value of plan assets at beginning of year (estimated)	15	19
Actual return on plan assets(2)	0	0
Employer contributions and benefit payments	9	8
Plan participants’ contributions	2	2
Benefits paid, including lump sum and annuity transfers	(13)	(14)
Other, including foreign currency translation	0	0
Fair value of plan assets at end of year (estimated)	13	15	$ 19
Noncurrent assets	0	0
Current liabilities	(7)	(8)
Noncurrent liabilities	(111)	(126)
Funded status	(118)	(134)
Accumulated benefit obligation at end of year	0	$ 0
Other Post-employment Benefits | U.S.
Defined Benefit Plan Disclosure [Line Items]
Employer contributions and benefit payments	$ 7
Discount rate	2.60%	2.10%
Ultimate	4.50%	4.50%
Year when rate will reach Ultimate	2037	2037
Other Post-employment Benefits | Canada
Defined Benefit Plan Disclosure [Line Items]
Employer contributions and benefit payments	$ 2
Discount rate	3.00%	2.40%
Assumed for next year	5.30%	5.30%
Ultimate	4.00%	4.00%
Year when rate will reach Ultimate	2040	2040
Other Post-employment Benefits | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	2.10%
Assumed for next year	4.50%	4.50%
Ultimate	4.00%	4.00%
Other Post-employment Benefits | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.00%	2.40%
Assumed for next year	6.20%	6.80%
Ultimate	4.50%	4.50%