CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities
Premiums collected	$ 4,594	$ 4,276	$ 4,055
Net investment income received	471	458	445
Limited partnership distributions	164	166	122
Service agreement fee received	31	33	34
Commissions and bonuses paid to agents	(617)	(583)	(532)
Losses paid	(2,818)	(2,953)	(2,398)
Loss expenses paid	(464)	(439)	(419)
Other underwriting and acquisition costs paid	(557)	(531)	(517)
Income taxes paid	(227)	(67)	(69)
Net cash provided by operating activities	577	360	721
Purchase of investments:
Fixed maturities	(2,112)	(1,801)	(1,760)
Preferred stock	(172)	(119)	(179)
Common stock	(1,807)	(1,742)	(1,495)
Limited partnerships	(100)	(209)	(165)
Sales/maturities of investments:
Fixed maturity sales	881	631	562
Fixed maturity calls/maturities	1,169	950	1,009
Preferred stock	154	113	135
Common stock	1,733	1,652	1,376
Sale of and returns on limited partnerships	201	163	142
Net purchase of property and equipment	(33)	(11)	(33)
Net collections (distributions) on agent loans	1	(1)	3
Net distributions on life policy loans	0	(1)	0
Net cash used in investing activities	(85)	(375)	(405)
Cash flows from financing activities
Annuity deposits and interest	92	95	111
Annuity surrenders and withdrawals	(83)	(81)	(79)
Universal life deposits and interest	23	29	38
Universal life surrenders	(10)	(16)	(35)
Purchase of treasury stock	(70)	(155)	(57)
Dividends paid to shareholders	(229)	(102)	(98)
Net cash used in financing activities	(277)	(230)	(120)
Net increase (decrease) in cash and cash equivalents	215	(245)	196
Cash and cash equivalents at beginning of year	185	430	234
Cash and cash equivalents at end of year	$ 400	$ 185	$ 430