Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income	$ 1,018	$ 733
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment (gains) losses	23	(44)
Depreciation and amortization	234	235
Deferred federal income tax expense	40	56
Amortization of deferred acquisition costs	1,310	1,207
Equity in income from other investments	(118)	(200)
Premiums receivable	(509)	(333)
Reinsurance recoverables	(282)	12
Deferred acquisition costs	(1,413)	(1,258)
Claims and claim adjustment expense reserves	679	777
Unearned premium reserves	727	509
Other operating activities	(443)	(504)
Net cash provided by operating activities	1,266	1,190
Cash flows from investing activities
Proceeds from maturities of fixed maturities	1,879	2,064
Proceeds from sales of investments:
Fixed maturities	1,044	1,238
Equity securities	63	25
Other investments	81	79
Purchases of investments:
Fixed maturities	(4,409)	(4,754)
Equity securities	(63)	(19)
Real estate investments	(9)	(5)
Other investments	(135)	(97)
Net sales of short-term securities	367	524
Securities transactions in the course of settlement	613	269
Acquisitions, net of cash acquired	(4)	(38)
Other investing activities	(84)	(60)
Net cash used in investing activities	(657)	(774)
Cash flows from financing activities
Treasury stock acquired — share repurchase authorizations	(500)	(356)
Treasury stock acquired — net employee share-based compensation	(59)	(41)
Dividends paid to shareholders	(213)	(214)
Issuance of common stock — employee share options	159	134
Net cash used in financing activities	(613)	(477)
Effect of exchange rate changes on cash	(5)	3
Net decrease in cash	(9)	(58)
Cash at beginning of year	761	721
Cash at end of period	752	663
Supplemental disclosure of cash flow information
Income taxes paid	10	58
Interest paid	$ 59	$ 59