CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities
Premiums collected	$ 4,276	$ 4,055	$ 3,964
Net investment income received	458	445	421
Limited partnership distributions	166	122	81
Service agreement fee received	33	34	35
Commissions and bonuses paid to agents	(583)	(532)	(535)
Losses paid	(2,953)	(2,398)	(2,241)
Loss expenses paid	(439)	(419)	(405)
Other underwriting and acquisition costs paid	(531)	(517)	(552)
Income taxes (paid) recovered	(67)	(69)	121
Net cash provided by operating activities	360	721	889
Purchase of investments:
Fixed maturities	(1,801)	(1,760)	(1,938)
Preferred stock	(119)	(179)	(176)
Common stock	(1,742)	(1,495)	(1,450)
Limited partnerships	(209)	(165)	(174)
Sales/maturities of investments:
Fixed maturity sales	631	562	510
Fixed maturity calls/maturities	950	1,009	734
Preferred stock	113	135	210
Common stock	1,652	1,376	1,394
Sale of and returns on limited partnerships	163	142	15
Purchase of property and equipment	(11)	(33)	(14)
Net (distributions) collections on agent loans	(1)	3	(2)
Net (distributions) collections on life policy loans	(1)	0	1
Net cash (used in) provided by investing activities	(375)	(405)	(890)
Cash flows from financing activities
Annuity and supplementary contract deposits and interest	95	111	183
Annuity and supplementary contract surrenders and withdrawals	(81)	(79)	(129)
Universal life deposits and interest	29	38	39
Universal life surrenders	(16)	(35)	(39)
Purchase of treasury stock	(155)	(57)	(3)
Dividends paid to shareholders	(102)	(98)	(93)
Decrease in collateral from securities lending	0	0	(285)
Redemption of securities lending collateral	0	0	285
Net cash used in financing activities	(230)	(120)	(42)
Net (decrease) increase in cash and cash equivalents	(245)	196	(43)
Cash and cash equivalents at beginning of year	430	234	277
Cash and cash equivalents at end of year	$ 185	$ 430	$ 234