Consolidated Statements of Cash Flows Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Income Taxes Paid, Net	$ (130)	$ 80	$ 313
Adjustments to reconcile net income to net cash provided by operating activities
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	896	1,682	798
Net realized capital losses	187	156	141
Deferred Policy Acquisition Costs and Present Value of Future Profits, Amortization	1,523	1,502	1,729
Increase (Decrease) in Deferred Policy Acquisition Costs	(1,390)	(1,390)	(1,364)
Depreciation and amortization	398	373	276
Loss on extinguishment of debt	0	(21)	0
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	81	(6)	653
Other operating activities, net	178	153	203
Change in reinsurance recoverables	241	146	(22)
Change in accrued and deferred income taxes	(250)	363	328
Change in reserve for future policy benefits and unpaid losses and loss adjustment expenses and unearned premiums	353	305	226
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(151)	(549)	(1,082)
Net receipts (disbursements) from investment contracts related to policyholder funds — international variable annuities	0	0	(3,993)
Net (increase) decrease in equity securities, trading	0	0	3,993
Net Cash Provided by (Used in) Operating Activities	2,066	2,756	1,886
Proceeds from the sale/maturity/prepayment of:
Fixed maturities, available-for-sale	24,486	25,946	25,309
Proceeds from Sale and Maturity of Available-for-sale Securities	238	181	401
Equity securities, available-for-sale	709	1,319	354
Mortgage loans	647	792	646
Partnerships	779	624	490
Payments for the purchase of:
Fixed maturities, available-for-sale	(21,844)	(27,744)	(22,545)
Payments to Acquire Available-for-sale Securities	(94)	(251)	(369)
Equity securities, available-for-sale	(662)	(1,454)	(683)
Mortgage loans	(717)	(870)	(604)
Partnerships	(441)	(620)	(312)
Derivatives, net	(247)	(173)	10
Change in policy loans, net	2	(30)	(11)
Payments to Acquire Property, Plant, and Equipment	(224)	(307)	(121)
Payments for (Proceeds from) Short-term Investments	(1,377)	3,071	(1,814)
Other investing activities, net	(131)	1	(18)
Proceeds from business sold			963
Payments to Acquire Businesses, Net of Cash Acquired	(175)	0	0
Net cash used for investing activities	949	485	1,696
Financing Activities
Deposits and other additions to investment and universal life-type contracts	4,186	4,718	5,289
Withdrawals and other deductions from investment and universal life-type contracts	(14,790)	(17,085)	(21,870)
Net Change Contract Holders Funds	9,822	11,046	14,366
Repayments at maturity or settlement of consumer notes	(17)	(33)	(13)
Net increase (decrease) in securities loaned or sold under agreements to repurchase	188	507
Repayment of long-term debt	(275)	(773)	(200)
Proceeds from net issuance of shares under incentive and stock compensation plans, excess tax benefit and other	9	42	30
Treasury stock acquired	(1,330)	(1,250)	(1,796)
Dividends paid on common stock	(334)	(316)	(282)
Net cash used for financing activities	(2,541)	(3,144)	(4,476)
Foreign exchange rate effect on cash	(40)	(48)	(135)
Cash - beginning of period	448	399	1,428
Cash - end of period	$ 882	$ 448	$ 399