Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 2,329	$ 1,387
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment (gains) losses	(113)	48
Depreciation and amortization	662	577
Deferred federal income tax expense (benefit)	61	(67)
Amortization of deferred acquisition costs	3,742	3,558
Equity in (income) loss from other investments	(774)	32
Premiums receivable	(462)	(324)
Reinsurance recoverables	20	(150)
Deferred acquisition costs	(3,955)	(3,694)
Claims and claim adjustment expense reserves	2,299	2,673
Unearned premium reserves	1,460	960
Other operating activities	313	(382)
Net cash provided by operating activities	5,582	4,618
Cash flows from investing activities
Proceeds from maturities of fixed maturities	6,523	5,241
Proceeds from sales of investments:
Fixed maturities	2,864	1,994
Equity securities	74	76
Real estate investments	7	0
Other investments	275	184
Purchases of investments:
Fixed maturities	(14,356)	(9,951)
Equity securities	(68)	(80)
Real estate investments	(22)	(33)
Other investments	(643)	(321)
Net sales (purchases) of short-term securities	754	(1,387)
Securities transactions in course of settlement	407	522
Acquisition, net of cash acquired	(38)	0
Other investing activities	(199)	(222)
Net cash used in investing activities	(4,422)	(3,977)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorizations	(1,356)	(425)
Treasury stock acquired — net employee share-based compensation	(43)	(46)
Dividends paid to shareholders	(655)	(643)
Issuance of debt	739	490
Issuance of common stock — employee share options	256	72
Net cash used in financing activities	(1,059)	(552)
Effect of exchange rate changes on cash	(4)	0
Net increase in cash	97	89
Cash at beginning of year	721	494
Cash at end of period	818	583
Supplemental disclosure of cash flow information
Income taxes paid	543	413
Interest paid	$ 222	$ 226