Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net income	$ 975	$ 1,018
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment (gains) losses	(6)	23
Depreciation and amortization	204	234
Deferred federal income tax expense	32	40
Amortization of deferred acquisition costs	1,462	1,310
Equity in income from other investments	(30)	(118)
Premiums receivable	(557)	(509)
Reinsurance recoverables	(24)	(282)
Deferred acquisition costs	(1,629)	(1,413)
Claims and claim adjustment expense reserves	381	679
Unearned premium reserves	893	727
Other operating activities	(689)	(443)
Net cash provided by operating activities	1,012	1,266
Cash flows from investing activities
Proceeds from maturities of fixed maturities	1,538	1,879
Proceeds from sales of investments:
Fixed maturities	2,364	1,044
Equity securities	28	63
Other investments	64	81
Purchases of investments:
Fixed maturities	(4,335)	(4,409)
Equity securities	(34)	(63)
Real estate investments	(14)	(9)
Other investments	(139)	(135)
Net sales of short-term securities	228	367
Securities transactions in the course of settlement	(35)	613
Acquisition, net of cash acquired	0	(4)
Other investing activities	(120)	(84)
Net cash used in investing activities	(455)	(657)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorizations	(398)	(500)
Treasury stock acquired — net employee share-based compensation	(62)	(59)
Dividends paid to shareholders	(215)	(213)
Issuance of common stock — employee share options	82	159
Net cash used in financing activities	(593)	(613)
Effect of exchange rate changes on cash	4	(5)
Net decrease in cash	(32)	(9)
Cash at beginning of year	799	761
Cash at end of period	767	752
Supplemental disclosure of cash flow information
Income taxes paid (received)	(16)	10
Interest paid	$ 60	$ 59