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Equity Method Investments And Variable Interest Entities (Consolidated Summarized Financial Information) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 2,331	$ 3,098
Noncurrent assets	3,435	4,069
Total assets	5,766	7,167
Current liabilities	1,501	2,969
Noncurrent liabilities	3,742	4,090
Total liabilities	$ 5,243	$ 7,059

The amount of current liabilities reported by an equity method investment of the entity.

The amount of liabilities and equity reported by an equity method investment of the entity.

The amount of noncurrent assets reported by an equity method investment of the entity.

The amount of noncurrent liabilities reported by an equity method investment of the entity.