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BENEFIT PLANS - FAIR VALUE OF PENSION PLAN ASSETS (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	$ 212	$ 213	$ 185
Cash and cash equivalents
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	17	16
Equity securities, International
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	65	58
Fixed income securities, Fixed rate bonds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	66	65
Mutual funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	18	20
Common trusts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets		5
Insurance contracts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	34	37
Hedge funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	11	12
Real Estate
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	$ 1
Equity | Mutual funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of investments	50.00%
Equity | Common trusts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of investments	65.00%
Fixed Income Investments | Mutual funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of investments	50.00%
Fixed Income Investments | Common trusts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Percentage of investments	35.00%
Fair Value, Inputs, Level 1, 2 and 3
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets		213
Level 1
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	$ 166	159
Level 1 | Cash and cash equivalents
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	17	16
Level 1 | Equity securities, International
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	65	58
Level 1 | Fixed income securities, Fixed rate bonds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	66	65
Level 1 | Mutual funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	18	20
Level 1 | Common trusts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets		0
Level 1 | Insurance contracts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 1 | Hedge funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 1 | Real Estate
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0
Level 2
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	5
Level 2 | Cash and cash equivalents
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 2 | Equity securities, International
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 2 | Fixed income securities, Fixed rate bonds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 2 | Mutual funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 2 | Common trusts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets		5
Level 2 | Insurance contracts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 2 | Hedge funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 2 | Real Estate
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0
Level 3
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	46	49	39
Level 3 | Cash and cash equivalents
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 3 | Equity securities, International
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 3 | Fixed income securities, Fixed rate bonds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 3 | Mutual funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	0	0
Level 3 | Common trusts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets		0
Level 3 | Insurance contracts
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	34	37	30
Level 3 | Hedge funds
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	11	12	9
Level 3 | Real Estate
Schedule of Pension and Other Postretirment Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Plan assets	$ 1	$ 0	$ 0

X

- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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X

- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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