Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities
Net Income	$ 1,118	$ 1,217
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	445	406
Realized investment (gains) losses	(192)	(20)
Deferred income taxes	237	67
Gains on sale of businesses (excluding discontinued operations)	(11)	(14)
Net changes in assets and liabilities, net of non-operating effects:
Premiums, accounts and notes receivable	(64)	(20)
Reinsurance recoverables	348	50
Deferred policy acquisition costs	(183)	(106)
Other assets	368	166
Insurance liabilities	870	75
Accounts payable, accrued expenses and other liabilities	(524)	(394)
Current income taxes	(33)	141
Cash used to effectively exit run-off reinsurance business	(2,196)	0
Other, net	(76)	(11)
Net cash (used in) / provided by operating activities	107	1,557
Proceeds from investments sold:
Fixed maturities	1,671	439
Equity securities	3	8
Commercial mortgage loans	324	325
Other (primarily short-term and other long-term investments)	766	649
Investment maturities and repayments:
Fixed maturities	1,192	1,030
Equity securities	27	0
Commercial mortgage loans	144	311
Investments purchased:
Fixed maturities	(1,580)	(1,907)
Equity securities	(56)	(8)
Commercial mortgage loans	(26)	(314)
Other (primarily short-term and other long-term investments)	(1,227)	(600)
Property and equipment purchases	(414)	(329)
Acquisitions and dispositions, net of cash acquired	(84)	(3,468)
Net cash provided by / (used in) investing activities	740	(3,864)
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds	1,078	999
Withdrawals and benefit payments from contractholder deposit funds	(1,029)	(927)
Change in cash overdraft position	9	19
Net change in short-term debt	(100)	123
Repayment of long-term debt	(7)	(326)
Repurchase of common stock	(836)	(85)
Issuance of common stock	132	58
Common dividends paid	(11)	(11)
Distributions to redeemable noncontrolling interest	(7)	0
Net cash provided by / (used in) by financing activities	(771)	(150)
Effect of foreign currency rate changes on cash and cash equivalents	1	3
Net increase / (decrease) in cash and cash equivalents	77	(2,454)
Cash and cash equivalents, January 1,	2,978	4,690
Cash and cash equivalents, September 30,	3,055	2,236
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds	289	414
Interest paid	$ 203	$ 186