Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities
Net income	$ 897	$ 676
Adjustments to reconcile net income to net cash flows provided by operating activities:
Deferred income tax expense	37	125
Trading portfolio activity	2	8
Net realized investment gains	(25)	(62)
Equity method investees	136	89
Net amortization of investments	(48)	(30)
Depreciation and amortization	59	66
Changes in:
Receivables, net	(47)	18
Accrued investment income	5	(31)
Deferred acquisition costs	(24)	(34)
Insurance reserves	108	248
Other assets	(193)	(121)
Other liabilities	(107)	(106)
Other, net	68	48
Total adjustments	(29)	218
Net cash flows provided by operating activities	868	894
Dispositions:
Fixed maturity securities - sales	6,622	4,167
Fixed maturity securities - maturities, calls and redemptions	1,838	2,635
Equity securities	69
Equity securities		22
Limited partnerships	304	160
Mortgage loans	83	22
Purchases:
Fixed maturity securities	(8,244)	(6,877)
Equity securities	(177)
Equity securities		(18)
Limited partnerships	(380)	(85)
Mortgage loans	(112)	(153)
Change in other investments	(10)	(2)
Change in short term investments	158	(29)
Purchases of property and equipment	(87)	(80)
Other, net	16	20
Net cash flows provided (used) by investing activities	80	(218)
Cash Flows from Financing Activities
Dividends paid to common stockholders	(801)	(761)
Proceeds from the issuance of debt	0	496
Repayment of debt	(180)	(391)
Other, net	(8)	(17)
Net cash flows used by financing activities	(989)	(673)
Effect of foreign exchange rate changes on cash	(4)	9
Net change in cash	(45)	12
Cash, beginning of year	355	271
Cash, end of period	$ 310	$ 283