Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities
Net Income	$ 301	$ 311
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	27	24
Realized investment gains, net	(149)	(105)
Share-based compensation	14	13
Interest credited to contract holders'	24	25
Deferred income tax expense	32	7
Changes in:
Investment income receivable	4	3
Premiums and reinsurance receivable	(91)	(132)
Deferred policy acquisition costs	(45)	(26)
Other assets	(37)	(39)
Loss and loss expense reserves	196	252
Life policy reserves	50	50
Unearned premiums	154	148
Other liabilities	(82)	(33)
Current income tax receivable/payable	47	1
Net cash provided by operating activities	445	499
Cash Flows From Investing Activities
Sale of fixed maturities	12	15
Call or maturity of fixed maturities	540	820
Sale of equity securities	288	208
Purchase of fixed maturities	(802)	(975)
Purchase of equity securities	(352)	(360)
Investment in finance receivables	(14)	(10)
Collection of finance receivables	11	15
Investment in buildings and equipment, net	(9)	(7)
Change in other invested assets, net	(7)	(13)
Net cash used in investing activities	(333)	(307)
Cash Flows From Financing Activities
Payment of cash dividends to shareholders	(158)	(151)
Shares acquired - share repurchase authorization	(70)	(2)
Payments of note payable	(3)	(7)
Proceeds from stock options exercised	8	13
Contract holders' funds deposited	42	50
Contract holders' funds withdrawn	(83)	(77)
Excess tax benefits on stock-based compensation	0	2
Other	(19)	(17)
Net cash used in financing activities	(283)	(189)
Net change in cash and cash equivalents	(171)	3
Cash and cash equivalents at beginning of year	777	544
Cash and cash equivalents at end of period	606	547
Supplemental Disclosures of Cash Flow Information:
Interest paid	26	26
Income taxes paid	23	110
Noncash Activities
Conversion of securities	5	3
Equipment acquired under capital lease obligations	6	12
Cashless exercise of stock options	4	7
Other assets and other liabilities	$ 70	$ 0