Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities
Net Income	$ 59	$ 371
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	150	126
Realized investment (gains) losses	(139)	(13)
Deferred income taxes	116	46
Gains on sale of businesses (excluding discontinued operations)	(4)	(5)
Net changes in assets and liabilities, net of non-operating effects:
Premiums, accounts and notes receivable	(158)	(215)
Reinsurance recoverables	328	(30)
Deferred policy acquisition costs	(82)	(47)
Other assets	103	155
Insurance liabilities	750	637
Accounts payable, accrued expenses and other liabilities	(328)	(166)
Current income taxes	(110)	105
Cash used to effectively exit run-off reinsurance business	(1,475)	0
Other, net	(15)	(23)
Net cash (used in) / provided by operating activities	(805)	941
Proceeds from investments sold:
Fixed maturities	958	221
Equity securities	3	0
Commercial mortgage loans	46	165
Other (primarily short-term and other long-term investments)	221	300
Investment maturities and repayments:
Fixed maturities	386	317
Equity securities	9	0
Commercial mortgage loans	9	36
Investments purchased:
Fixed maturities	(383)	(831)
Equity securities	(27)	0
Commercial mortgage loans	(15)	(180)
Other (primarily short-term and other long-term investments)	(121)	(167)
Property and equipment purchases	(84)	(81)
Acquisitions and dispositions, net of cash acquired	(40)	(3,199)
Net cash provided by / (used in) investing activities	962	(3,419)
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds	363	261
Withdrawals and benefit payments from contractholder deposit funds	(332)	(231)
Change in cash overdraft position	(3)	22
Net change in short-term debt	198	123
Repayment of long-term debt	0	(326)
Repurchase of common stock	(77)	0
Issuance of common stock	36	45
Net cash provided by / (used in) by financing activities	185	(106)
Effect of foreign currency rate changes on cash and cash equivalents	(14)	5
Net increase / (decrease) in cash and cash equivalents	328	(2,579)
Cash and cash equivalents, January 1,	2,978	4,690
Cash and cash equivalents, March 31,	3,306	2,111
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds	12	22
Interest paid	$ 70	$ 54