Consolidated Condensed Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities:
Net income	$ 398	$ 519
Adjustments to reconcile net income to net cash provided (used) by operating activities, net	335	270
Changes in operating assets and liabilities, net:
Receivables	(68)	142
Deferred acquisition costs	(40)	(15)
Insurance reserves	79	99
Other assets	(3)	(6)
Other liabilities	(101)	(187)
Trading securities	8	(494)
Net cash flow operating activities	608	328
Investing Activities:
Purchases of fixed maturities	(2,720)	(2,842)
Proceeds from sales of fixed maturities	1,409	1,929
Proceeds from maturities of fixed maturities	866	683
Purchases of equity securities	(12)	(12)
Proceeds from sales of equity securities	51	19
Purchases of limited partnership investments	(41)	(66)
Proceeds from sales of limited partnership investments	58	97
Purchases of property, plant and equipment	(602)	(238)
Dispositions	5	41
Change in short term investments	375	(88)
Other, net	(22)	(36)
Net cash flow investing activities	(633)	(513)
Financing Activities:
Dividends paid	(24)	(25)
Dividends paid to noncontrolling interests	(122)	(108)
Purchases of treasury shares	(95)
Issuance of common stock	3	5
Proceeds from sale of subsidiary stock	1	245
Principal payments on debt	(196)	(331)
Issuance of debt	420	370
Other, net	(4)	(2)
Net cash flow financing activities	(17)	154
Effect of foreign exchange rate on cash	(7)	1
Net change in cash	(49)	(30)
Cash, beginning of period	228	129
Cash, end of period	$ 179	$ 99