Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Variable Interest Entity) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Current Assets	$ 2,370	$ 1,920
Noncurrent Assets	1,068	1,102
Total Assets	3,438	3,022
Current Liabilities	1,965	1,931
Noncurrent Liabilities	1,281	1,355
Total Liabilities	$ 3,246	$ 3,286