CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities
Net Income	$ 562.1	$ 559.0
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Change in Receivables	57.2	52.3
Change in Deferred Acquisition Costs	(21.8)	(43.3)
Change in Insurance Reserves and Liabilities	243.6	291.3
Change in Income Taxes	236.7	(5.5)
Change in Other Accrued Liabilities	15.0	(34.9)
Non-cash Components of Net Investment Income	(231.4)	(185.5)
Net Realized Investment Gain (Loss)	6.2	4.8
Depreciation	54.9	49.5
Other, Net	20.2	8.5
Net Cash Provided by Operating Activities	942.7	696.2
Cash Flows from Investing Activities
Proceeds from Sales of Fixed Maturity Securities	606.9	287.2
Proceeds from Maturities of Fixed Maturity Securities	811.1	1,523.6
Proceeds from Sales and Maturities of Other Investments	187.1	257.4
Purchases of Fixed Maturity Securities	1,906.1	1,931.3
Purchases of Other Investments	(153.0)	(308.9)
Net Purchases of Short-term Investments	(388.3)	(281.5)
Net Decrease in Payables for Collateral on Investments	(100.0)	(88.5)
Net Purchases of Property and Equipment	(64.9)	(59.6)
Net Cash Used by Investing Activities	(1,007.2)	(601.6)
Cash Flows from Financing Activities
Issuance of Long-term Debt	395.9	290.7
Long-term Debt Repayments	(30.0)	(30.0)
Issuance of Common Stock	3.5	2.6
Repurchase of Common Stock	(200.2)	(205.8)
Dividends Paid to Stockholders	(110.9)	(103.3)
Other, Net	(27.0)	(26.7)
Net Cash Provided (Used) by Financing Activities	31.3	(72.5)
Net Increase (Decrease) in Cash and Bank Deposits	(33.2)	22.1
Cash and Bank Deposits at Beginning of Year	94.0	77.4
Cash and Bank Deposits at End of Period	$ 60.8	$ 99.5