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Subsequent Event (Details) (Apex [Member], USD $)	1 Months Ended
Subsequent Event (Details) (Apex [Member], USD $)	Oct. 31, 2012	Sep. 28, 2012
Apex [Member]
Subsequent Event [Line Items]
Equity method investment, ownership percentage		50.00%
Proceeds from sale of equity method investment	$ 1,600,000,000
Equity method investment, net sales proceeds	$ 650,000,000

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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