DEBT - Net Carrying Value Of The Convertible Notes (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Net carrying amount of the liability component	$ 2,631	$ 2,680
2026 Convertible Notes
Debt Instrument [Line Items]
Net carrying amount of the liability component	449
Carrying amount of equity component, net of issuance costs	126
Convertible Notes \| 2022 Convertible Notes
Debt Instrument [Line Items]
Principal amount	230	230
Unamortized debt discount	(5)	(13)
Unamortized debt issuance costs	(1)	(2)
Net carrying amount of the liability component	224	215
Carrying amount of equity component, net of issuance costs	33	33
Convertible Notes \| 2026 Convertible Notes
Debt Instrument [Line Items]
Principal amount	575	0
Unamortized debt discount	(104)	0
Unamortized debt issuance costs	(10)	0
Net carrying amount of the liability component	461	0
Carrying amount of equity component, net of issuance costs	$ 117	$ 0

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount.

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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.

+ References

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-Publisher FASB
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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long term debt and finance lease obligations, gross.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long term debt and finance lease obligations, net of unamortized discount and debt issuance costs.

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