Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 1,651	$ 1,274
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other non-cash items	248	238
Realized capital gains and losses	159	(215)
Gain on disposition of operations	(3)	(14)
Interest credited to contractholder funds	326	348
Changes in:
Policy benefits and other insurance reserves	(22)	228
Unearned premiums	211	34
Deferred policy acquisition costs	(80)	(65)
Premium installment receivables, net	(185)	(51)
Reinsurance recoverables, net	(9)	6
Income taxes	(257)	(42)
Other operating assets and liabilities	51	(393)
Net cash provided by operating activities	2,090	1,348
Proceeds from sales
Fixed income securities	19,515	14,521
Equity securities	3,576	3,430
Limited partnership interests	182	481
Other investments	135	118
Investment collections
Fixed income securities	1,442	2,063
Mortgage loans	315	305
Other investments	235	337
Investment purchases
Fixed income securities	(20,401)	(17,214)
Equity securities	(3,901)	(3,473)
Limited partnership interests	(873)	(578)
Mortgage loans	(316)	(148)
Other investments	(535)	(532)
Change in short-term investments, net	(512)	2,142
Change in other investments, net	(35)	107
Purchases of property and equipment, net	(128)	(146)
Acquisition of operations	(10)	(1,356)
Net cash (used in) provided by investing activities	(1,311)	57
Cash flows from financing activities
Proceeds from issuance of long-term debt	498	0
Redemption and repayment of long-term debt	(401)	0
Proceeds from issuance of preferred stock	557	0
Contractholder fund deposits	506	515
Contractholder fund withdrawals	(997)	(957)
Dividends paid on common stock	(295)	(257)
Dividends paid on preferred stock	(58)	(58)
Treasury stock purchases	(838)	(657)
Shares reissued under equity incentive plans, net	28	108
Other	93	(53)
Net cash used in financing activities	(907)	(1,359)
Net (decrease) increase in cash	(128)	46
Cash at beginning of period	617	436
Cash at end of period	$ 489	$ 482

The cash outflow used to purchase loans that are secured with real estate mortgage.

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Amount of cash inflow (outflow) from financing activities classified as other.

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