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Business Basis of Presentation and Summary of Significant Accounting Policies (Details 2) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net cash provided by operating activities	$ 12,102	$ 6,788
Net change in other invested assets	(225)	(1)
Previously Reported [Member]
Net cash provided by operating activities		6,793
Net change in other invested assets		(6)
Restatement Adjustment [Member]
Net cash provided by operating activities		(5)
Net change in other invested assets		$ 5

The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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