Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Amortization Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Amortization of Intangible Assets	$ 194	$ 175	$ 381	$ 354
Amortization Expense, Remaining 2016	395		395
Amortization Expense, 2017	839		839
Amortization Expense, 2018	849		849
Amortization Expense, 2019	860		860
Amortization Expense, 2020	831		831
Amortization Expense, 2021	$ 891		$ 891