CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows from Operating Activities
Net Income	$ 751.2	$ 607.7
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Change in Receivables	285.6	481.1
Change in Deferred Acquisition Costs	(84.6)	(69.6)
Change in Insurance Liabilities	(194.2)	(10.9)
Change in Income Taxes	10.6	23.0
Change in Other Accrued Liabilities	(191.2)	(86.7)
Non-cash Components of Net Investment Income	(208.8)	(240.3)
Net Investment Gain (Loss)	(1.0)	17.9
Depreciation	52.8	56.7
Amortization of the Cost of Reinsurance	22.0	26.7
Other, Net	21.8	(21.0)
Net Cash Provided by Operating Activities	464.2	784.6
Cash Flows from Investing Activities
Proceeds from Sale of Debt Securities, Available-for-sale	302.5	356.9
Proceeds from Maturities of Fixed Maturity Securities	868.8	785.8
Proceeds from Sales and Maturities of Other Investments	162.8	218.6
Payments to Acquire Debt Securities, Available-for-sale	(1,176.0)	(1,728.0)
Purchases of Other Investments	(158.1)	(248.9)
Net Maturities and Sales (Purchases) of Short-term Investments	(160.9)	126.4
Net Increase (Decrease) in Payables for Collateral on Investments	(56.0)	19.3
Net Purchases of Property and Equipment	(56.3)	(44.4)
Net Cash Used by Investing Activities	(273.2)	(514.3)
Cash Flows from Financing Activities
Issuance of Common Stock	2.7	1.7
Repurchase of Common Stock	(98.6)	(93.4)
Dividends Paid to Stockholders	(134.3)	(122.3)
Proceeds from Policyholder Account Deposits	74.0	61.4
Payments for Policyholder Account Withdrawals	(45.1)	(38.8)
Other, Net	(0.6)	(2.5)
Net Cash Used by Financing Activities	(201.9)	(193.9)
Net Increase (Decrease) in Cash and Bank Deposits	(10.9)	76.4
Cash and Bank Deposits at Beginning of Year	119.2	75.0
Cash and Bank Deposits at End of Period	$ 108.3	$ 151.4