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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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DEBT (Narrative) (Details)			1 Months Ended				12 Months Ended
DEBT (Narrative) (Details)	Oct. 20, 2022 USD ($)	Dec. 19, 2014 USD ($)	Jul. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Feb. 28, 2022 USD ($)	Jul. 31, 2021 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 EUR (€)	Mar. 31, 2023 USD ($)	Apr. 14, 2020 USD ($)	Apr. 10, 2020 USD ($) amendement	Apr. 02, 2020 USD ($)	Mar. 23, 2020 USD ($)	Mar. 22, 2020 USD ($)	Mar. 14, 2019 USD ($)	Jun. 30, 2015 EUR (€)	Sep. 30, 2014 USD ($)	Jul. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Line of Credit Facility [Line Items]
Outstanding credit facility balance				$ 250,000,000			$ 250,000,000	$ 250,000,000
Repayments of senior debt							75,000,000	75,000,000	$ 75,000,000
Interest paid							$ 33,800,000	41,000,000.0	$ 40,300,000
Term Loan
Line of Credit Facility [Line Items]
Borrowing capacity option amount	$ 1,500,000,000
Senior Notes
Line of Credit Facility [Line Items]
Consolidated leverage ratio under credit facility & note payable, maximum							0.035
Senior Notes \| 2023 Series A Notes and 2025 Series B Notes
Line of Credit Facility [Line Items]
Face amount																					$ 150,000,000.0
Senior Notes \| 2023 Series A Notes
Line of Credit Facility [Line Items]
Face amount																					$ 75,000,000.0
Stated interest rate (as a percent)																					3.94%
Repayments of senior debt				75,000,000.0
Senior Notes \| 2024 Series B Notes
Line of Credit Facility [Line Items]
Face amount																				$ 75,000,000.0
Stated interest rate (as a percent)																				3.76%
Repayments of senior debt			$ 75,000,000
Senior Notes \| 2025 Series B Notes
Line of Credit Facility [Line Items]
Face amount							$ 75,000,000														$ 75,000,000.0
Stated interest rate (as a percent)							4.04%			4.04%											4.04%
Senior Notes \| 2026 Senior Notes
Line of Credit Facility [Line Items]
Face amount							$ 75,000,000												$ 75,000,000.0
Stated interest rate (as a percent)							3.72%			3.72%									3.72%
Senior Notes \| NY Life 2013 Note Agreement and the NY Life 2014 Note Agreement
Line of Credit Facility [Line Items]
Number of amendments \| amendement													2
Senior Notes \| 2021 Series A Notes and 2024 Series B Notes
Line of Credit Facility [Line Items]
Face amount																				$ 125,000,000.0
Senior Notes \| 2021 Series A Notes
Line of Credit Facility [Line Items]
Face amount																				$ 50,000,000.0
Stated interest rate (as a percent)																				3.32%
Repayments of senior debt						$ 50,000,000.0
Senior Notes \| 2025 Series C Notes
Line of Credit Facility [Line Items]
Face amount \| €										€ 88,857,000								€ 88,900,000
Stated interest rate (as a percent)							1.785%			1.785%								1.785%
Senior Notes \| Prudential 2030 Series D Notes
Line of Credit Facility [Line Items]
Borrowing capacity													$ 425,000,000.0
Face amount							$ 75,000,000					$ 75,000,000.0
Stated interest rate (as a percent)							2.50%			2.50%		2.50%
Senior Notes \| 2022 Series A Notes and 2027 Series B Notes
Line of Credit Facility [Line Items]
Face amount		$ 150,000,000.0
Senior Notes \| 2022 Series A Notes
Line of Credit Facility [Line Items]
Debt instrument, term		7 years
Face amount		$ 75,000,000.0
Stated interest rate (as a percent)		3.25%
Repayments of senior debt					$ 75,000,000.0
Senior Notes \| 2027 Series B Notes
Line of Credit Facility [Line Items]
Debt instrument, term		12 years
Face amount		$ 75,000,000.0					$ 75,000,000
Stated interest rate (as a percent)		3.72%					3.72%			3.72%
Senior Notes \| 2029 Series C Notes
Line of Credit Facility [Line Items]
Face amount							$ 100,000,000										$ 100,000,000.0
Stated interest rate (as a percent)							4.19%			4.19%							4.19%
Senior Notes \| MetLife 2030 Series D Notes
Line of Credit Facility [Line Items]
Borrowing capacity															$ 300,000,000.0	$ 150,000,000.0
Face amount							$ 125,000,000							$ 125,000,000.0
Stated interest rate (as a percent)							2.50%			2.50%				2.50%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Outstanding credit facility balance				$ 250,000,000			$ 250,000,000	$ 250,000,000
Stated interest rate (as a percent)				6.00%			6.20%	6.00%		6.20%
Reduction of credit facility availability				$ 1,500,000			$ 1,900,000	$ 1,500,000
Consolidated leverage ratio under credit facility & note payable, maximum							0.035
Revolving Credit Facility \| Term Loan
Line of Credit Facility [Line Items]
Debt instrument, term	5 years
Borrowing capacity	$ 1,000,000,000
Principal amount	$ 250,000,000
Revolving Credit Facility, Individual Borrowings \| Minimum
Line of Credit Facility [Line Items]
Debt instrument, term	1 day
Revolving Credit Facility, Individual Borrowings \| Maximum
Line of Credit Facility [Line Items]
Debt instrument, term	180 days
Secured Debt \| Term Loan
Line of Credit Facility [Line Items]
Face amount	$ 250,000,000										$ 250,000,000
Outstanding credit facility balance				$ 250,000,000			$ 250,000,000	$ 250,000,000
Secured Debt \| Term Loan \| Prime Rate \| Minimum
Line of Credit Facility [Line Items]
Credit spread during period (as a percent)	0.00%
Secured Debt \| Term Loan \| Prime Rate \| Maximum
Line of Credit Facility [Line Items]
Credit spread during period (as a percent)	0.375%
Secured Debt \| Term Loan \| Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Credit spread during period (as a percent)	0.10%
Secured Debt \| Term Loan \| Secured Overnight Financing Rate (SOFR) \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate, additional (as a percent)	0.875%
Secured Debt \| Term Loan \| Secured Overnight Financing Rate (SOFR) \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate, additional (as a percent)	1.375%
Secured Debt \| Term Loan \| Daily Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Credit spread during period (as a percent)	0.10%
Secured Debt \| Term Loan \| Daily Secured Overnight Financing Rate (SOFR) \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate, additional (as a percent)	0.875%
Secured Debt \| Term Loan \| Daily Secured Overnight Financing Rate (SOFR) \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate, additional (as a percent)	1.375%