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DEBT (Narrative) (Details) |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 20, 2022 USD ($) | Feb. 12, 2022 USD ($) | Jul. 31, 2021 USD ($) | Dec. 19, 2014 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2023 EUR (€) | Mar. 31, 2023 USD ($) | 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 | $ 579,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of senior debt |  |  |  |  | 75,000,000 | 75,000,000 | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Interest paid |  |  |  |  | $ 41,000,000 | 40,300,000 | $ 30,500,000 |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of amendments | amendement |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Senior Notes | 2023 Series A Notes and 2025 Series B Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 150,000,000
Senior Notes | 2023 Series A Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000
Stated interest rate (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.94%
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
Stated interest rate (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 |  |
Stated interest rate (percent) |  |  |  |  | 3.72% |  |  | 3.72% |  |  |  |  |  |  |  |  | 3.72% |  |
Senior Notes | 2021 Series A Notes and 2024 Series B Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 125,000,000 |
Senior Notes | 2021 Series A Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |
Stated interest rate (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.32% |
Repayments of senior debt |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 2024 Series B Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000 |
Stated interest rate (percent) |  |  |  |  | 3.76% |  |  | 3.76% |  |  |  |  |  |  |  |  |  | 3.76% |
Senior Notes | 2025 Series C Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount | € |  |  |  |  |  |  |  | € 88,857,000 |  |  |  |  |  |  |  | € 88,900,000 |  |  |
Stated interest rate (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 |  |  |  |  |  |  |  |
Face amount |  |  |  |  | $ 75,000,000 |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |
Stated interest rate (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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 2022 Series A Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (percent) |  |  |  | 3.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of senior debt |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 2027 Series B Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  |  | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  | $ 75,000,000 | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (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 |  |  |  |
Stated interest rate (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 | $ 150,000,000 |  |  |  |  |
Face amount |  |  |  |  | $ 125,000,000 |  |  |  |  |  |  | $ 125,000,000 |  |  |  |  |  |  |
Stated interest rate (percent) |  |  |  |  | 2.50% |  |  | 2.50% |  |  |  | 2.50% |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding credit facility balance |  |  |  |  | $ 250,000,000 | 579,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (percent) |  |  |  |  | 6.00% |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |
Credit facility weighted average interest rates on outstanding balance (percent) |  |  |  |  | 3.10% |  |  | 3.10% |  |  |  |  |  |  |  |  |  |  |
Reduction of credit facility availability |  |  |  |  | $ 1,500,000 | $ 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt | Term Loan | Prime Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period (percent) | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt | Term Loan | Prime Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period (percent) | 0.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt | Term Loan | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period (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 (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 (percent) | 1.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured Debt | Term Loan | Daily Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period (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 (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 (percent) | 1.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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