Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows From Operating Activities
Net Income	$ 311	$ 304
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24	27
Realized investment gains, net	(105)	(107)
Stock-based compensation	13	11
Interest credited to contract holders'	25	22
Deferred income tax expense	7	2
Changes in:
Investment income receivable	3	1
Premiums and reinsurance receivable	(132)	(93)
Deferred policy acquisition costs	(26)	(15)
Other assets	(39)	(6)
Loss and loss expense reserves	252	206
Life policy reserves	50	47
Unearned premiums	148	109
Other liabilities	(42)	(68)
Current income tax receivable/payable	1	30
Net cash provided by operating activities	490	470
Cash Flows From Investing Activities
Sale of fixed maturities	15	19
Call or maturity of fixed maturities	820	675
Sale of equity securities	208	221
Purchase of fixed maturities	(975)	(1,005)
Purchase of equity securities	(360)	(229)
Purchase of short-term investments	0	(75)
Investment in finance receivables	(10)	(6)
Collection of finance receivables	15	15
Investment in buildings and equipment, net	(7)	(5)
Change in other invested assets, net	(13)	1
Net cash used in investing activities	(307)	(389)
Cash Flows From Financing Activities
Payment of cash dividends to shareholders	(151)	(145)
Payments for Repurchase of Common Stock	(2)	(20)
Repayments of Notes Payable	7	0
Proceeds from stock options exercised	13	11
Contract holders' funds deposited	50	41
Contract holders' funds withdrawn	(77)	(67)
Excess tax benefits on stock-based compensation	2	4
Other	(8)	(9)
Net cash used in financing activities	(180)	(185)
Net change in cash and cash equivalents	3	(104)
Cash and cash equivalents at beginning of year	544	591
Cash and cash equivalents at end of period	547	487
Supplemental Disclosures of Cash Flow Information:
Interest Paid, Net	26	26
Income taxes paid	110	83
Noncash Activities
Conversion of securities	3	0
Equipment acquired under capital lease obligations	12	6
Cashless exercise of stock options	$ 7	$ 6