Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows from Operating Activities
Net Income	$ 1,478	$ 1,624	$ 1,261
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	597	560	345
Realized investment (gains) losses	(213)	(44)	(62)
Deferred income taxes	197	134	217
Gains on sale of businesses (excluding discontinued operations)	(15)	(18)	(25)
Net changes in assets and liabilities, net of non-operating effects:
Premiums, accounts and notes receivable	(110)	(71)	(50)
Reinsurance recoverables	369	62	19
Deferred policy acquisition costs	(227)	(159)	(129)
Other assets	405	31	(307)
Insurance liabilities	1,040	245	154
Accounts payable, accrued expenses and other liabilities	(483)	(132)	344
Current income taxes	(56)	29	(246)
Cash used to exit Run-off Reinsurance business	(2,196)	0	0
Proceeds from sales of mortgage loans held for sale	0	61	0
Other, net	(67)	28	(30)
Net cash provided by operating activities	719	2,350	1,491
Proceeds from investments sold:
Fixed maturities	1,767	583	830
Equity securities	8	8	16
Other (primarily short-term and other long-term investments)	1,661	831	1,915
Investment maturities and repayments:
Fixed maturities	1,593	1,507	1,265
Equity securities	28	0	30
Commercial mortgage loans	653	722	638
Investments purchased or originated:
Fixed maturities	(3,006)	(2,326)	(2,877)
Equity securities	(56)	(8)	(20)
Commercial mortgage loans	(58)	(364)	(487)
Other (primarily short-term and other long-term investments)	(1,930)	(821)	(2,056)
Property and equipment purchases	(527)	(408)	(422)
Acquisitions, net of cash acquired	(76)	(3,581)	(102)
Other	(42)	0	0
Net cash provided by/ (used in) investing activities	15	(3,857)	(1,270)
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds	1,399	1,337	1,323
Withdrawals and benefit payments from contractholder deposit funds	(1,358)	(1,264)	(1,178)
Change in cash overdraft position	16	25	(1)
Net change in short-term debt	(101)	98	0
Net proceeds on issuance of long-term debt	0	0	2,676
Repayment of long-term debt	(15)	(326)	(451)
Repurchase of common stock	(1,003)	(208)	(225)
Issuance of common stock	150	121	734
Common dividends paid	(11)	(11)	(11)
Distributions to redeemable noncontrolling interest	(7)	0	0
Net cash (used in) / provided by financing activities	(930)	(228)	2,867
Effect of foreign currency rate changes on cash and cash equivalents	13	23	(3)
Net increase (decrease) in cash and cash equivalents	(183)	(1,712)	3,085
Cash and cash equivalents, beginning of year	2,978	4,690	1,605
Cash and cash equivalents, end of year	2,795	2,978	4,690
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds	519	655	633
Interest paid	$ 265	$ 248	$ 185