DEBT - Debt Balances, Net of Unamortized Debt Issuance Costs (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,699
Finance Leases	83		$ 83
Debt and lease obligation	2,749		2,631
2025 Notes \| Senior notes
Debt Instrument [Line Items]
Long-term debt, gross	250		250
Unamortized debt discount and issuance costs	(2)		(2)
Long-term debt	248		248
2028 Notes \| Senior notes
Debt Instrument [Line Items]
Long-term debt, gross	350		350
Unamortized debt discount and issuance costs	(3)		(4)
Long-term debt	347		346
2029 Notes \| Senior notes
Debt Instrument [Line Items]
Long-term debt, gross	500		500
Unamortized debt discount and issuance costs	(6)		(7)
Long-term debt	494		493
Term Loan \| Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	784		784
Unamortized debt discount and issuance costs	(6)		(8)
Long-term debt	778		776
Revolving Corporate Credit Facility, net \| Corporate Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	230		0
Unamortized debt discount and issuance costs	5		0
Long-term debt	$ 225		0
Unamortized debt issuance costs			2
Interest rate, effective percentage	7.00%
2022 Convertible Notes \| Convertible notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	$ 230	230
Unamortized debt discount and issuance costs	0		(6)
Long-term debt	0	$ 225	224
Unamortized debt issuance costs	$ 0		1
2026 Convertible Notes
Debt Instrument [Line Items]
Interest rate, effective percentage	0.55%
2026 Convertible Notes \| Convertible notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 575		575
Unamortized debt discount and issuance costs	(11)		(114)
Long-term debt	564		461
Unamortized debt issuance costs	11		10
Non-interest bearing note payable, net
Debt Instrument [Line Items]
Long-term debt, gross	10		$ 0
Non-interest bearing note payable, net \| Convertible notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 10

Amount of short-term and long-term debt and lease obligation.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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