Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities
Net income (loss)	$ 444	$ 416
Adjustments to reconcile net income (loss) to net cash flows provided (used) by operating activities:
(Gain) loss on disposal of property and equipment		1
Deferred income tax expense (benefit)	122	81
Trading portfolio activity	(7)	(44)
Net realized investment (gains) losses	(14)	(58)
Equity method investees	(151)	(8)
Amortization of investments	(14)	(33)
Depreciation and amortization	58	39
Changes in:
Receivables, net	(83)	70
Accrued investment income	(12)	(10)
Deferred acquisition costs	(43)	(17)
Insurance reserves	198	121
Other assets	(69)	43
Other liabilities	134	12
Other, net	6	5
Total adjustments	125	202
Net cash flows provided (used) by operating activities	569	618
Dispositions:
Fixed maturity securities - sales	3,143	3,303
Fixed maturity securities - maturities, calls and redemptions	1,820	1,566
Equity securities	60	61
Limited partnerships	77	64
Mortgage loans	18	5
Purchases:
Fixed maturity securities	(5,656)	(5,169)
Equity securities	(33)	(27)
Limited partnerships	(103)	(53)
Mortgage loans	(54)	(109)
Change in other investments		2
Change in short term investments	293	(123)
Purchases of property and equipment	(42)	(42)
Other, net	6	12
Net cash flows provided (used) by investing activities	(471)	(510)
Cash Flows from Financing Activities
Dividends paid to common stockholders	(108)	(81)
Stock options exercised	1	1
Other, net	(20)	(3)
Net cash flows provided (used) by financing activities	(127)	(83)
Effect of foreign exchange rate changes on cash	(6)
Net change in cash	(35)	25
Cash, beginning of year	156	75
Cash, end of period	$ 121	$ 100