LIABILITIES FOR INSURANCE PRODUCTS - GUARANTEED MINIMUM CREDITING RATES (Details) $ in Millions | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 15,736.7 | $ 15,667.8 | $ 15,302.9 |
0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 1,757 | | $ 1,681.7 |
0.00%-2.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 0% | | 0% |
0.00%-2.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 2.99% | | 2.99% |
3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 2,180.1 | | $ 2,350.6 |
3.00%-4.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 3% | | 3% |
3.00%-4.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 4.99% | | 4.99% |
5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 144.2 | | $ 123.8 |
5.00% and greater | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 5% | | 5% |
At guaranteed minimum | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 171.5 | | $ 272.8 |
At guaranteed minimum | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 1,892.1 | | 2,122.4 |
At guaranteed minimum | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 143.7 | | $ 123.3 |
1-50 basis points above | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0001 | | 0.0001 |
1-50 basis points above | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0050 | | 0.0050 |
1-50 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 579 | | $ 902.4 |
1-50 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 99.3 | | 79.4 |
1-50 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 0.5 | | $ 0.5 |
51-150 basis points above | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0051 | | 0.0051 |
51-150 basis points above | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0150 | | 0.0150 |
51-150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 238.4 | | $ 304.6 |
51-150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 183 | | 148.5 |
51-150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 0 | | $ 0 |
Greater than 150 basis points above | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balance, above guaranteed minimum crediting rate | 0.0150 | | 0.0150 |
Greater than 150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 768.1 | | $ 201.9 |
Greater than 150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 5.7 | | 0.3 |
Greater than 150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Contracts Excluding Fixed Indexed Annuities | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 4,081.3 | | 4,156.1 |
Contracts Excluding Fixed Indexed Annuities | At guaranteed minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 2,207.3 | | 2,518.5 |
Contracts Excluding Fixed Indexed Annuities | 1-50 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 678.8 | | 982.3 |
Contracts Excluding Fixed Indexed Annuities | 51-150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 421.4 | | 453.1 |
Contracts Excluding Fixed Indexed Annuities | Greater than 150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 773.8 | | 202.2 |
Fixed interest annuities | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 2,189.9 | | 2,281.9 |
Fixed interest annuities | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 651 | | $ 591.8 |
Fixed interest annuities | 0.00%-2.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 0% | | 0% |
Fixed interest annuities | 0.00%-2.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 2.99% | | 2.99% |
Fixed interest annuities | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 1,451.3 | | $ 1,599.8 |
Fixed interest annuities | 3.00%-4.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 3% | | 3% |
Fixed interest annuities | 3.00%-4.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 4.99% | | 4.99% |
Fixed interest annuities | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 87.6 | | $ 90.3 |
Fixed interest annuities | 5.00% and greater | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 5% | | 5% |
Fixed interest annuities | At guaranteed minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 1,573.4 | | $ 1,807.2 |
Fixed interest annuities | At guaranteed minimum | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 105.2 | | 144.9 |
Fixed interest annuities | At guaranteed minimum | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 1,380.6 | | 1,572 |
Fixed interest annuities | At guaranteed minimum | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 87.6 | | 90.3 |
Fixed interest annuities | 1-50 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 261.5 | | 319.4 |
Fixed interest annuities | 1-50 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 211.9 | | 291.7 |
Fixed interest annuities | 1-50 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 49.6 | | 27.7 |
Fixed interest annuities | 1-50 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Fixed interest annuities | 51-150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 248.9 | | 78.4 |
Fixed interest annuities | 51-150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 233 | | 78.3 |
Fixed interest annuities | 51-150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 15.9 | | 0.1 |
Fixed interest annuities | 51-150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Fixed interest annuities | Greater than 150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 106.1 | | 76.9 |
Fixed interest annuities | Greater than 150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 100.9 | | 76.9 |
Fixed interest annuities | Greater than 150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 5.2 | | 0 |
Fixed interest annuities | Greater than 150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 134.6 | | 149.1 |
Other annuities | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 55.7 | | $ 73.1 |
Other annuities | 0.00%-2.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 0% | | 0% |
Other annuities | 0.00%-2.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 2.99% | | 2.99% |
Other annuities | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 44.4 | | $ 65.3 |
Other annuities | 3.00%-4.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 3% | | 3% |
Other annuities | 3.00%-4.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 4.99% | | 4.99% |
Other annuities | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 34.5 | | $ 10.7 |
Other annuities | 5.00% and greater | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 5% | | 5% |
Other annuities | At guaranteed minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 110.5 | | $ 119.6 |
Other annuities | At guaranteed minimum | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 31.6 | | 43.6 |
Other annuities | At guaranteed minimum | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 44.4 | | 65.3 |
Other annuities | At guaranteed minimum | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 34.5 | | 10.7 |
Other annuities | 1-50 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 24.1 | | 29.5 |
Other annuities | 1-50 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 24.1 | | 29.5 |
Other annuities | 1-50 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | 1-50 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | 51-150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | 51-150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | 51-150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | 51-150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | Greater than 150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | Greater than 150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | Greater than 150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other annuities | Greater than 150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Interest-sensitive life | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 1,373.6 | | 1,327.9 |
Interest-sensitive life | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 690.2 | | $ 643.6 |
Interest-sensitive life | 0.00%-2.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 0% | | 0% |
Interest-sensitive life | 0.00%-2.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 2.99% | | 2.99% |
Interest-sensitive life | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 661.5 | | $ 661.9 |
Interest-sensitive life | 3.00%-4.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 3% | | 3% |
Interest-sensitive life | 3.00%-4.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 4.99% | | 4.99% |
Interest-sensitive life | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 21.9 | | $ 22.4 |
Interest-sensitive life | 5.00% and greater | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 5% | | 5% |
Interest-sensitive life | At guaranteed minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 483.2 | | $ 549.9 |
Interest-sensitive life | At guaranteed minimum | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 17.6 | | 66.5 |
Interest-sensitive life | At guaranteed minimum | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 444.2 | | 461.5 |
Interest-sensitive life | At guaranteed minimum | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 21.4 | | 21.9 |
Interest-sensitive life | 1-50 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 50.2 | | 278 |
Interest-sensitive life | 1-50 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 225.8 |
Interest-sensitive life | 1-50 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 49.7 | | 51.7 |
Interest-sensitive life | 1-50 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0.5 | | 0.5 |
Interest-sensitive life | 51-150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 172.5 | | 374.7 |
Interest-sensitive life | 51-150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 5.4 | | 226.3 |
Interest-sensitive life | 51-150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 167.1 | | 148.4 |
Interest-sensitive life | 51-150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Interest-sensitive life | Greater than 150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 667.7 | | 125.3 |
Interest-sensitive life | Greater than 150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 667.2 | | 125 |
Interest-sensitive life | Greater than 150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0.5 | | 0.3 |
Interest-sensitive life | Greater than 150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 383.2 | | 397.2 |
Other | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 360.1 | | $ 373.2 |
Other | 0.00%-2.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 0% | | 0% |
Other | 0.00%-2.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 2.99% | | 2.99% |
Other | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 22.9 | | $ 23.6 |
Other | 3.00%-4.99% | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 3% | | 3% |
Other | 3.00%-4.99% | Maximum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 4.99% | | 4.99% |
Other | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 0.2 | | $ 0.4 |
Other | 5.00% and greater | Minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Range of guaranteed minimum crediting rates | 5% | | 5% |
Other | At guaranteed minimum | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 40.2 | | $ 41.8 |
Other | At guaranteed minimum | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 17.1 | | 17.8 |
Other | At guaranteed minimum | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 22.9 | | 23.6 |
Other | At guaranteed minimum | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0.2 | | 0.4 |
Other | 1-50 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 343 | | 355.4 |
Other | 1-50 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 343 | | 355.4 |
Other | 1-50 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | 1-50 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | 51-150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | 51-150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | 51-150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | 51-150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | Greater than 150 basis points above | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | Greater than 150 basis points above | 0.00%-2.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | Greater than 150 basis points above | 3.00%-4.99% | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Other | Greater than 150 basis points above | 5.00% and greater | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 0 | | 0 |
Fixed indexed annuities | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | 10,247.1 | | 9,738.7 |
Funding agreements | | | |
Policyholder Account Balance [Line Items] | | | |
Policyholder account balances | $ 1,408.3 | | $ 1,408.1 |