INCOME TAXES (Provision for Income Taxes) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Investment tax credit amount	$ 336.5	$ 167.6	$ 177.1
Liability for the purchase of transferrable federal renewable energy tax credits	$ 266.0

The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration