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LIABILITIES FOR INSURANCE PRODUCTS - SUMMARY OF AMOUNT OF UNDISCOUNTED AND DISCOUNTED EXPECTED GROSS PREMIUMS AND EXPECTED FUTURE BENEFITS (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Jun. 30, 2023
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Other annuities |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Expected future gross premiums (Undiscounted) | $ 0.0 | $ 0.0
Expected future gross premiums (Discounted) | 0.0 | 0.0
Expected future benefits and expenses (Undiscounted) | 345.8 | 391.4
Expected future benefits and expenses (Discounted) | 281.3 | 309.0
Supplemental health |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Expected future gross premiums (Undiscounted) | 8,935.0 | 8,991.5
Expected future gross premiums (Discounted) | 5,441.5 | 5,531.8
Expected future benefits and expenses (Undiscounted) | 10,836.5 | 11,128.9
Expected future benefits and expenses (Discounted) | 5,782.3 | 6,009.6
Medicare supplement |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Expected future gross premiums (Undiscounted) | 5,808.6 | 5,610.2
Expected future gross premiums (Discounted) | 4,002.7 | 3,931.0
Expected future benefits and expenses (Undiscounted) | 4,652.8 | 4,401.0
Expected future benefits and expenses (Discounted) | 3,177.5 | 3,068.0
Long-term care |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Expected future gross premiums (Undiscounted) | 3,381.3 | 2,938.2
Expected future gross premiums (Discounted) | 2,342.2 | 2,109.2
Expected future benefits and expenses (Undiscounted) | 7,785.9 | 7,446.7
Expected future benefits and expenses (Discounted) | 4,201.9 | 4,214.9
Traditional life |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Expected future gross premiums (Undiscounted) | 5,684.5 | 5,509.5
Expected future gross premiums (Discounted) | 4,035.2 | 3,947.9
Expected future benefits and expenses (Undiscounted) | 7,615.0 | 7,443.2
Expected future benefits and expenses (Discounted) | $ 4,569.8 | $ 4,525.2

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