Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 1,387	$ 1,749
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment (gains) losses	48	(101)
Depreciation and amortization	577	581
Deferred federal income tax benefit	(67)	(10)
Amortization of deferred acquisition costs	3,558	3,420
Equity in (income) loss from other investments	32	(196)
Premiums receivable	(324)	(611)
Reinsurance recoverables	(150)	212
Deferred acquisition costs	(3,694)	(3,619)
Claims and claim adjustment expense reserves	2,673	927
Unearned premium reserves	960	1,350
Other operating activities	(382)	91
Net cash provided by operating activities	4,618	3,793
Cash flows from investing activities
Proceeds from maturities of fixed maturities	5,241	4,895
Proceeds from sales of investments:
Fixed maturities	1,994	1,801
Equity securities	76	99
Other investments	184	346
Purchases of investments:
Fixed maturities	(9,951)	(8,234)
Equity securities	(80)	(62)
Real estate investments	(33)	(95)
Other investments	(321)	(369)
Net purchases of short-term securities	(1,387)	(617)
Securities transactions in course of settlement	522	432
Other investing activities	(222)	(243)
Net cash used in investing activities	(3,977)	(2,047)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorization	(425)	(1,125)
Treasury stock acquired — net employee share-based compensation	(46)	(47)
Dividends paid to shareholders	(643)	(633)
Payment of debt	0	(500)
Issuance of debt	490	492
Issuance of common stock — employee share options	72	206
Net cash used in financing activities	(552)	(1,607)
Effect of exchange rate changes on cash	0	(4)
Net increase in cash	89	135
Cash at beginning of year	494	373
Cash at end of period	583	508
Supplemental disclosure of cash flow information
Income taxes paid	413	367
Interest paid	$ 226	$ 231