Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 1,123	$ 975
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment gains	(35)	(6)
Depreciation and amortization	196	204
Deferred federal income tax expense	42	32
Amortization of deferred acquisition costs	1,698	1,462
Equity in income from other investments	(68)	(30)
Premiums receivable	(557)	(557)
Reinsurance recoverables	33	(24)
Deferred acquisition costs	(1,776)	(1,629)
Claims and claim adjustment expense reserves	928	381
Unearned premium reserves	457	893
Other operating activities	(583)	(689)
Net cash provided by operating activities	1,458	1,012
Cash flows from investing activities
Proceeds from maturities of fixed maturities	1,709	1,538
Proceeds from sales of investments:
Fixed maturities	942	2,364
Equity securities	21	28
Other investments	55	64
Purchases of investments:
Fixed maturities	(3,738)	(4,335)
Equity securities	(26)	(34)
Real estate investments	(13)	(14)
Other investments	(90)	(139)
Net sales of short-term securities	454	228
Securities transactions in the course of settlement	111	(35)
Acquisition, net of cash acquired	(381)	0
Other investing activities	(81)	(120)
Net cash used in investing activities	(1,037)	(455)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorizations	(250)	(398)
Treasury stock acquired — net employee share-based compensation	(110)	(62)
Dividends paid to shareholders	(229)	(215)
Issuance of common stock — employee share options	190	82
Net cash used in financing activities	(399)	(593)
Effect of exchange rate changes on cash	(5)	4
Net increase (decrease) in cash	17	(32)
Cash at beginning of year	650	799
Cash at end of period	667	767
Supplemental disclosure of cash flow information
Income taxes paid (received)	24	(16)
Interest paid	60	60
Supplemental disclosure of noncash financing activities
Issuance of common stock — net share settlement of employee options	$ 28	$ 0