Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities
Net Income	$ 1,659	$ 1,632
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	451	435
Realized investment (gains) losses	(104)	(130)
Deferred income taxes	44	12
Net changes in assets and liabilities, net of non-operating effects:
Premiums, accounts and notes receivable	(1,051)	(574)
Reinsurance recoverables	61	49
Deferred policy acquisition costs	(145)	(138)
Other assets	(89)	(186)
Insurance liabilities	620	433
Accounts payable, accrued expenses and other liabilities	219	(39)
Current income taxes	36	53
Loss on extinguishment of debt	100	0
Other, net	(82)	(75)
Net cash provided by / (used in) operating activities	1,719	1,472
Proceeds from investments sold:
Fixed maturities and equity securities	1,452	854
Investment maturities and repayments:
Fixed maturities and equity securities	1,018	1,285
Commercial mortgage loans	458	375
Other sales, maturities and repayments (primarily short-term and other long-term investments)	1,006	1,889
Investments purchased or originated:
Fixed maturities and equity securities	(2,686)	(4,027)
Commercial mortgage loans	(389)	(186)
Other (primarily short-term and other long-term investments)	(689)	(1,221)
Property and equipment purchases	(357)	(350)
Acquisitions, net of cash acquired	(110)	0
Other, net	0	(24)
Net cash provided by/ (used in) investing activities	(297)	(1,405)
Cash Flows from Financing Activities
Deposits and interest credited to contractholder deposit funds	1,092	1,154
Withdrawals and benefit payments from contractholder deposit funds	(1,053)	(1,129)
Net change in short-term debt	(15)	(104)
Net proceeds on issuance of long-term debt	894	0
Repayment of long-term debt	(938)	0
Repurchase of common stock	(536)	(1,256)
Issuance of common stock	136	93
Other, net	(5)	18
Net cash provided by / (used in) financing activities	(425)	(1,224)
Effect of foreign currency rate changes on cash and cash equivalents	(36)	(17)
Net increase (decrease) in cash and cash equivalents	961	(1,174)
Cash and cash equivalents, January 1	1,420	2,795
Cash and cash equivalents, September 30	2,381	1,621
Supplemental Disclosure of Cash Information:
Income taxes paid, net of refunds	881	846
Interest paid	$ 192	$ 203