Acquisitions, Goodwill and Other Intangible Assets (Other Intangible Assets, Net) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Acquisitions, Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets subject to amortization	$ 13,544	$ 13,725
Indefinite-lived intangible assets	124	130
Total	$ 13,668	$ 13,855