Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities
Net Income	$ 6,095	$ 4,572	$ 4,807
Adjustments to reconcile net income to net cash provided by operating activities:
Net gains on financial instruments	(318)	(182)	(67)
Equity in net earnings of other invested assets	(562)	(51)	(93)
Depreciation and amortization	1,302	1,154	1,133
Deferred income taxes	326	(540)	81
Impairment of property and equipment	73	198	0
Share-based compensation	255	283	294
Changes in operating assets and liabilities:
Receivables, net	(2,138)	(256)	(1,053)
Other invested assets	(70)	(32)	(48)
Other assets	37	(283)	(170)
Policy liabilities	2,597	3,528	1,826
Unearned income	(113)	202	115
Accounts payable and other liabilities	719	1,978	(445)
Income taxes	140	72	(325)
Other, net	21	45	6
Net cash provided by operating activities	8,364	10,688	6,061
Investing activities
Purchases of investments	(18,669)	(19,492)	(22,954)
Proceeds from sale of investments	10,269	11,318	18,598
Maturities, calls and redemptions from investments	4,344	4,741	2,437
Changes in securities lending collateral	(956)	(849)	254
Purchases of subsidiaries, net of cash acquired	(3,476)	(1,976)	0
Purchases of property and equipment	(1,087)	(1,021)	(1,077)
Other, net	(63)	(45)	(50)
Net cash used in investing activities	(9,638)	(7,324)	(2,792)
Financing activities
Net proceeds from (repayments of) commercial paper borrowings	50	(150)	(297)
Proceeds from long-term borrowings	3,462	2,484	2,473
Repayments of long-term borrowings	(1,068)	(1,932)	(1,123)
Proceeds from short-term borrowings	1,325	970	7,590
Repayments of short-term borrowings	(1,050)	(1,670)	(8,035)
Changes in securities lending payable	956	849	(254)
Repurchase and retirement of common stock	(1,900)	(2,700)	(1,701)
Cash dividends	(1,104)	(954)	(818)
Proceeds from issuance of common stock under employee stock plans	203	176	187
Taxes paid through withholding of common stock under employee stock plans	(102)	(128)	(84)
Other, net	(349)	488	(204)
Net cash provided by (used in) financing activities	423	(2,567)	(2,266)
Effect of foreign exchange rates on cash and cash equivalents	(10)	7	0
Change in cash and cash equivalents	(861)	804	1,003
Cash and cash equivalents at beginning of year	5,741	4,937	3,934
Cash and cash equivalents at end of year	$ 4,880	$ 5,741	$ 4,937