Consolidated Condensed Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Consolidated Condensed Statements Of Comprehensive Income [Abstract]
Net income	$ 519	$ 562
Changes in:
Net unrealized gains on investments with other- than-temporary impairments	40	38
Net other unrealized gains on investments	217	23
Total unrealized gains on available-for-sale investments	257	61
Unrealized gains (losses) on cash flow hedges	15	(17)
Foreign currency	21	26
Pension liability	7
Other comprehensive income	300	70
Comprehensive income	819	632
Amounts attributable to noncontrolling interests	(183)	(189)
Total comprehensive income attributable to Loews Corporation	$ 636	$ 443

Unrealized change in the value of securities which have been other-than-temporarily impaired, after tax.

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