CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash Flows from Operating Activities
Net Income	$ 455.2	$ 439.5
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Change in Receivables	88.4	43.5
Change in Deferred Acquisition Costs	(41.3)	(27.5)
Change in Insurance Reserves and Liabilities	221.9	339.8
Change in Income Taxes	43.6	125.5
Change in Other Accrued Liabilities	31.0	(58.9)
Non-cash Adjustments to Net Investment Income	(215.8)	(236.4)
Net Realized Investment (Gain) Loss	(11.6)	3.9
Depreciation	39.7	37.0
Other, Net	4.6	2.0
Net Cash Provided by Operating Activities	615.7	668.4
Cash Flows from Investing Activities
Proceeds from Sales of Available-for-Sale Securities	585.5	550.4
Proceeds from Maturities of Available-for-Sale Securities	905.5	1,327.1
Proceeds from Sales and Maturities of Other Investments	69.2	63.6
Purchase of Available-for-Sale Securities	(1,588.1)	(2,080.7)
Purchase of Other Investments	(165.1)	(106.9)
Net Sales (Purchases) of Short-term Investments	196.2	(42.8)
Other, Net	(49.4)	(139.8)
Net Cash Used by Investing Activities	(46.2)	(429.1)
Cash Flows from Financing Activities
Net Short-term Debt Repayments	(84.7)	0
Long-term Debt Repayments	(49.4)	(57.7)
Issuance of Common Stock	6.9	8.7
Repurchase of Common Stock	(369.7)	(127.6)
Dividends Paid to Stockholders	(58.3)	(55.2)
Other, Net	3.3	2.3
Net Cash Used by Financing Activities	(551.9)	(229.5)
Effect of Foreign Exchange Rate Changes on Cash	0	(0.1)
Net Increase in Cash and Bank Deposits	17.6	9.7
Cash and Bank Deposits at Beginning of Year	53.6	71.6
Cash and Bank Deposits at End of Period	$ 71.2	$ 81.3