Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities
Net Income	$ 287	$ 1,045	$ 591
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	63	55	48
Investment gains and losses, net	408	(148)	(124)
Share-based compensation	28	26	23
Interest credited to contract holders'	47	48	48
Deferred income tax expense	(47)	(444)	38
Changes in:
Investment income receivable	2	0	(5)
Premiums and reinsurance receivable	(109)	77	(113)
Deferred policy acquisition costs	(48)	(36)	(26)
Other assets	(1)	(43)	34
Loss and loss expense reserves	434	188	367
Life policy and investment contract reserves	96	96	102
Unearned premiums	112	97	106
Other liabilities	0	24	61
Current income tax receivable/payable	(91)	67	(35)
Net cash provided by operating activities	1,181	1,052	1,115
Cash Flows From Investing Activities
Sale of fixed maturities	36	23	15
Call or maturity of fixed maturities	1,127	1,172	1,511
Sale of equity securities	403	523	465
Purchase of fixed maturities	(1,510)	(1,723)	(1,994)
Purchase of equity securities	(441)	(513)	(439)
Investment in finance receivables	(33)	(32)	(17)
Collection of finance receivables	25	23	30
Investment in buildings and equipment	(20)	(16)	(13)
Change in other invested assets, net	(38)	(15)	(14)
Net cash used in investing activities	(451)	(558)	(456)
Cash Flows From Financing Activities
Payment of cash dividends to shareholders	(336)	(400)	(306)
Shares acquired - share repurchase authorization	(125)	(92)	(39)
Changes in note payable	8	4	(15)
Proceeds from stock options exercised	9	13	21
Contract holders' funds deposited	84	79	95
Contract holders' funds withdrawn	(183)	(164)	(155)
Excess tax benefits on share-based compensation	0	0	5
Other	(60)	(54)	(32)
Net cash used in financing activities	(603)	(614)	(426)
Net change in cash and cash equivalents	127	(120)	233
Cash and cash equivalents at beginning of year	657	777	544
Cash and cash equivalents at end of year	784	657	777
Supplemental Disclosures of Cash Flow Information
Interest paid	53	52	52
Income taxes paid	98	60	213
Noncash Activities
Conversion of securities	0	5	4
Equipment acquired under capital lease obligations	21	14	20
Cashless exercise of stock options	5	7	13
Other assets and other liabilities	$ 48	$ 75	$ 53