Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Cash Flows From Operating Activities
Net income	$ 154.8	$ 197.2	$ 20.6
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on disposal of variable life insurance and annuity business	(1.3)	(4.9)	(11.3)
(Gain) loss on sale of FAFLIC	(0.5)	(7.1)	77.3
Gain on sale of AMGRO, Inc.			(11.1)
Loss (gain) from retirement of debt	2.0	(34.5)
Net realized investment (gains) losses	(29.3)	1.8	112.2
Net amortization and depreciation	16.7	11.8	15.1
Stock-based compensation expense	11.3	11.7	11.6
Amortization of defined benefit plan costs	9.8	19.8	(3.6)
Deferred federal income taxes	52.0	31.9	53.7
Change in deferred acquisition costs	(57.7)	(21.5)	(10.5)
Change in premiums and notes receivable, net of reinsurance premiums payable	(204.9)	(14.1)	75.0
Change in accrued investment income	(1.1)		3.1
Change in policy liabilities and accruals, net	288.2	9.9	(156.8)
Change in reinsurance receivable	(38.2)	(58.3)	116.7
Change in expenses and taxes payable	(85.0)	(44.6)	(103.2)
Other, net	(33.2)	(7.5)	20.7
Net cash provided by operating activities	83.6	91.6	209.5
Cash Flows From Investing Activities
Proceeds from disposals and maturities of available-for-sale fixed maturities	1,376.2	2,162.3	1,114.1
Proceeds from disposals of equity securities and other investments	123.6	70.9	11.9
Proceeds from mortgages sold, matured or collected	9.0	17.4	10.2
Proceeds from collections of installment finance and notes receivable			192.3
Cash transferred with sale of FAFLIC		(108.1)
Net proceeds from sale of AMGRO, Inc.			1.0
Proceeds from sale of variable life insurance and annuity business, net			13.3
Purchase of available-for-sale fixed maturities	(1,401.5)	(2,345.8)	(828.2)
Purchase of equity securities and other investments	(184.9)	(44.5)	(22.9)
Capital expenditures	(10.9)	(10.4)	(9.5)
Disbursements to fund installment finance and notes receivable			(178.6)
Other investing items	3.0		(0.3)
Net cash (used in) provided by investing activities	(98.8)	(174.2)	189.2
Cash Flows From Financing Activities
Withdrawals from contractholder deposit funds and trust instruments supported by funding obligations			(21.0)
Exercise of options	12.0	3.1	8.2
Proceeds from debt borrowings	207.5	125.0
Change in collateral related to securities lending program	(7.7)	53.1	(50.6)
Dividends paid to shareholders	(47.2)	(37.5)	(23.0)
Repurchases of debt	(38.5)	(125.9)
Repurchases of common stock	(134.7)	(148.1)	(58.5)
Other financing activities		0.1	0.3
Net cash used in financing activities	(8.6)	(130.2)	(144.6)
Net change in cash and cash equivalents	(23.8)	(212.8)	254.1
Net change in cash related to discontinued operations	(2.3)	131.6	(67.0)
Cash and cash equivalents, beginning of year	316.5	397.7	210.6
Cash and cash equivalents, end of year	290.4	316.5	397.7
Supplemental Cash Flow information
Interest payments	40.3	35.5	40.9
Income tax net payments	11.3	47.9	36.5
FAFLIC [Member]
Cash Flows From Investing Activities
Proceeds from the sale of FAFLIC		105.8
AIX Holdings, Inc. [Member]
Cash Flows From Investing Activities
Net cash used for business acquisitions	$ (13.3)	$ (21.8)	$ (114.1)