Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net income	$ 4,999	$ 2,991	$ 2,842
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment losses	30	105	204
Depreciation and amortization	715	722	826
Deferred federal income tax benefit	(152)	(163)	(186)
Amortization of deferred acquisition costs	6,973	6,226	5,515
Equity in income from other investments	(294)	(157)	(336)
Premiums receivable	(859)	(1,341)	(877)
Reinsurance recoverables	111	(63)	344
Deferred acquisition costs	(7,173)	(6,689)	(5,824)
Claims and claim adjustment expense reserves	2,680	2,843	2,050
Unearned premium reserves	1,488	2,590	1,862
Other operating activities	556	647	45
Net cash provided by operating activities	9,074	7,711	6,465
Cash flows from investing activities
Proceeds from maturities of fixed maturities	8,537	6,371	6,837
Proceeds from sales of investments:
Fixed maturities	1,634	4,981	5,657
Equity securities	143	138	138
Real estate investments	64	0	10
Other investments	422	255	302
Purchases of investments:
Fixed maturities	(17,132)	(15,690)	(15,908)
Equity securities	(124)	(105)	(136)
Real estate investments	(48)	(67)	(41)
Other investments	(396)	(495)	(574)
Net sales (purchases) of short-term securities	370	(1,664)	355
Securities transactions in the course of settlement	56	(83)	21
Acquisitions, net of cash acquired	(382)	0	(4)
Other investing activities	(408)	(462)	(385)
Net cash used in investing activities	(7,264)	(6,821)	(3,728)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorizations	(1,003)	(958)	(2,000)
Treasury stock acquired — net employee share-based compensation	(114)	(64)	(61)
Dividends paid to shareholders	(951)	(908)	(875)
Issuance of debt	0	738	0
Issuance of common stock — employee share options	321	141	267
Net cash used in financing activities	(1,747)	(1,051)	(2,669)
Effect of exchange rate changes on cash and restricted cash	(14)	12	(30)
Net increase (decrease) in cash and restricted cash	49	(149)	38
Cash and restricted cash at beginning of year	650	799	761
Cash and restricted cash at end of year	699	650	799
Supplemental disclosure of cash flow information
Income taxes paid	1,310	201	817
Interest paid	$ 390	$ 370	$ 349