Consolidated Condensed Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating Activities:
Net income	$ 519	$ 562
Adjustments to reconcile net income to net cash provided (used) by operating activities, net	270	164
Changes in operating assets and liabilities, net:
Receivables	142	138
Deferred acquisition costs	(15)	(15)
Insurance reserves	99	45
Other assets	(6)	10
Other liabilities	(187)	(297)
Trading securities	(494)	522
Net cash flow operating activities	328	1,129
Investing Activities:
Purchases of fixed maturities	(2,842)	(3,480)
Proceeds from sales of fixed maturities	1,929	1,893
Proceeds from maturities of fixed maturities	683	965
Purchases of equity securities	(12)	(34)
Proceeds from sales of equity securities	19	128
Purchases of property, plant and equipment	(238)	(150)
Deposits for construction of offshore drilling equipment		(309)
Dispositions	41
Change in short term investments	(88)	277
Change in other investments	(17)	(114)
Other, net	12	8
Net cash flow investing activities	(513)	(816)
Financing Activities:
Dividends paid	(25)	(26)
Dividends paid to noncontrolling interests	(108)	(98)
Purchases of treasury shares		(188)
Issuance of common stock	5	4
Proceeds from sale of subsidiary stock	245	6
Principal payments on debt	(331)	(913)
Issuance of debt	370	904
Other, net	(2)	(1)
Net cash flow financing activities	154	(312)
Effect of foreign exchange rate on cash	1	2
Net change in cash	(30)	3
Cash, beginning of period	129	120
Cash, end of period	$ 99	$ 123