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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ADDITIONAL DISCLOSURES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)
Restrictions on Cash and Cash Equivalents
Required reserve balances by the Federal Reserve Bank	$ 0	$ 0
Cash reserve to cover insurable claims	$ 0	$ 4
Equity
Percentage of stock dividend in excess of which are reported by transferring the par value of the stock issued from retained earnings to common stock	20.00%
Minimum percentage of stock dividend which are reported by transferring the par value of the stock issued from retained earnings to common stock and additional paid in capital	20.00%
Segment Information
Number of reportable segments | segment	6
Revenue, Practical Expedient
Practical expedient allows incremental costs of obtaining contract when amortization period less than one year	true

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- Definition

Represents the minimum percentage of stock dividend which are reported by transferring the par value of the stock issued from retained earnings to common stock and additional paid in capital, as of the ex- dividend date.

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Represents the percentage of stock dividend in excess of which are reported by transferring the par value of the stock issued from retained earnings to common stock.

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Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

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-Section 50
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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Indicates (true false) whether practical expedient was elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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