Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 600	$ 796
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment (gains) losses	98	(53)
Depreciation and amortization	203	211
Deferred federal income tax expense	6	32
Amortization of deferred acquisition costs	1,178	1,117
Equity in income from other investments	(67)	(34)
Premiums receivable	(326)	(434)
Reinsurance recoverables	(15)	98
Deferred acquisition costs	(1,215)	(1,185)
Claims and claim adjustment expense reserves	388	(2)
Unearned premium reserves	414	551
Other operating activities	(636)	(458)
Net cash provided by operating activities	628	639
Cash flows from investing activities
Proceeds from maturities of fixed maturities	1,461	1,556
Proceeds from sales of investments:
Fixed maturities	388	769
Equity securities	33	39
Other investments	64	105
Purchases of investments:
Fixed maturities	(2,630)	(2,914)
Equity securities	(35)	(22)
Real estate investments	(16)	(77)
Other investments	(103)	(146)
Net sales (purchases) of short-term securities	906	(109)
Securities transactions in course of settlement	85	295
Other investing activities	(69)	(82)
Net cash provided by (used in) investing activities	84	(586)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorization	(425)	(375)
Treasury stock acquired — net employee share-based compensation	(46)	(46)
Dividends paid to shareholders	(210)	(205)
Issuance of debt	0	492
Issuance of common stock — employee share options	31	63
Net cash used in financing activities	(650)	(71)
Effect of exchange rate changes on cash	(12)	2
Net increase (decrease) in cash	50	(16)
Cash at beginning of year	494	373
Cash at end of period	544	357
Supplemental disclosure of cash flow information
Income taxes paid	15	5
Interest paid	$ 60	$ 50