Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 2,952	$ 3,074
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other non-cash items	500	476
Realized capital (gains) losses	(682)	(1,183)
Pension and other postretirement remeasurement (gains) losses	320	365
Gain on disposition of operations	(3)	(3)
Interest credited to contractholder funds	482	487
Impairment of purchased intangibles	0	55
Changes in:
Policy benefits and other insurance reserves	(73)	29
Unearned premiums	710	813
Deferred policy acquisition costs	(55)	(66)
Premium installment receivables, net	(153)	(392)
Reinsurance recoverables, net	121	167
Income taxes	(617)	254
Other operating assets and liabilities	670	(181)
Net cash provided by operating activities	4,172	3,895
Proceeds from sales
Fixed income securities	25,567	23,075
Equity securities	7,544	3,735
Limited partnership interests	991	557
Other investments	209	279
Investment collections
Fixed income securities	1,676	1,847
Mortgage loans	278	451
Other investments	158	203
Investment purchases
Fixed income securities	(31,743)	(23,536)
Equity securities	(3,882)	(6,080)
Limited partnership interests	(796)	(989)
Mortgage loans	(197)	(475)
Other investments	(299)	(548)
Change in short-term and other investments, net	(515)	(1,443)
Purchases of property and equipment, net	(235)	(293)
Acquisition of operations	1	(18)
Net cash used in investing activities	(1,243)	(3,235)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	491
Redemption and repayment of long-term debt	0	(317)
(Redemption) issuance of preferred stock	(288)	1,122
Contractholder fund deposits	749	751
Contractholder fund withdrawals	(1,151)	(1,278)
Dividends paid on common stock	(500)	(490)
Dividends paid on preferred stock	(82)	(92)
Treasury stock purchases	(1,737)	(936)
Shares reissued under equity incentive plans, net	54	98
Other	58	79
Net cash used in financing activities	(2,897)	(572)
Net increase in cash	32	88
Cash at beginning of period	338	499
Cash at end of period	$ 370	$ 587