Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities
Net Income	$ 2,499	$ 1,965
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	438	425
Realized investment (gains) losses	36	(214)
Deferred income taxes (benefits)	17	62
Net changes in assets and liabilities, net of non-operating effects:
Premiums, accounts and notes receivable	(243)	(190)
Reinsurance recoverables	100	144
Deferred policy acquisition costs	(195)	(209)
Other assets	339	(156)
Insurance liabilities	408	988
Accounts payable, accrued expenses and other liabilities	113	221
Current income taxes	73	7
Debt extinguishment costs	0	321
Distributions from partnership investments	128	114
Other, net	(69)	33
Net cash provided by (used in) operating activities	3,644	3,511
Proceeds from investments sold:
Fixed maturities and equity securities	1,930	1,376
Investment maturities and repayments:
Fixed maturities and equity securities	1,394	1,444
Commercial mortgage loans	181	253
Other sales, maturities and repayments (primarily short-term and other long-term investments)	588	1,486
Investments purchased or originated:
Fixed maturities and equity securities	(4,461)	(4,292)
Commercial mortgage loans	(288)	(272)
Other (primarily short-term and other long-term investments)	(660)	(722)
Property and equipment purchases	(346)	(340)
Acquisitions, net of cash acquired	0	(33)
Other, net	(12)	0
Net cash provided by (used in) investing activities	(1,674)	(1,100)
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds	816	965
Withdrawals and benefit payments from contractholder deposit funds	(872)	(1,079)
Net change in short-term debt	(109)	(16)
Payments for debt extinguishment	0	(313)
Repayment of long-term debt	(131)	(1,250)
Net proceeds on issuance of long-term debt	19,884	1,584
Repurchase of common stock	(310)	(1,961)
Issuance of common stock	41	111
Other, net	(204)	(9)
Net cash provided by (used in) financing activities	19,115	(1,968)
Effect of foreign currency rate changes on cash and cash equivalents	(25)	28
Net increase / (decrease) in cash and cash equivalents	21,060	471
Cash and cash equivalents, January 1,	2,972	3,185
Cash and cash equivalents, September 30,	24,032	3,656
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds	767	812
Interest paid	$ 167	$ 197