CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash Flows from Operating Activities
Net Income	$ 564.4	$ 1,430.4
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Change in Receivables	521.2	566.4
Deferred Policy Acquisition Cost	(131.1)	(107.4)
Change in Insurance Liabilities	484.5	(631.0)
Change in Income Taxes	19.0	21.9
Change in Other Accrued Liabilities	(143.1)	(58.3)
Non-cash Components of Net Investment Income	(299.7)	(327.9)
Net Investment Loss	(96.5)	(24.5)
Depreciation	91.8	89.9
Net Cash Paid in Relation to Reinsurance Agreement	(953.5)	0.0
Amortization of Deferred Loss on Reinsurance	67.9	31.1
Amortization of Deferred Gain on Reinsurance	(4.6)	0.0
Other, Net	16.5	(12.2)
Net Cash Provided by Operating Activities	329.8	1,027.4
Cash Flows from Investing Activities
Proceeds from Sale of Debt Securities, Available-for-sale	673.1	356.5
Proceeds from Maturities of Fixed Maturity Securities	1,506.7	997.2
Proceeds from Sales and Maturities of Other Investments	375.3	234.8
Payments to Acquire Debt Securities, Available-for-sale	(1,747.2)	(1,550.9)
Purchases of Other Investments	(281.9)	(218.6)
Net Sales and Maturities (Purchases) of Short-term Investments	33.5	(307.9)
Net Increase in Payables for Collateral on Investments	306.4	189.5
Net Purchases of Property and Equipment	(94.5)	(93.7)
Net Cash Provided (Used) by Investing Activities	771.4	(393.1)
Cash Flows from Financing Activities
Issuance of Long-term Debt	0.0	391.6
Repayments of Long-term Debt	0.0	350.0
Issuance of Common Stock	4.3	4.8
Repurchase of Common Stock	(751.8)	(500.0)
Dividends Paid to Stockholders	(228.9)	(219.3)
Proceeds from Policyholder Account Deposits	93.6	100.9
Payments for Policyholder Account Withdrawals	(68.8)	(65.5)
Cash Received Related to Active Life Volatility Cover Agreement	17.4	26.7
Other, Net	(1.9)	(6.1)
Net Cash Used by Financing Activities	(936.1)	(616.9)
Net Increase (Decrease) in Cash and Bank Deposits	165.1	17.4
Cash and Bank Deposits at Beginning of Year	162.8	146.0
Cash and Bank Deposits at End of Period	$ 327.9	$ 163.4