Goodwill and other Intangible Assets (Other Intangible Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets subject to amortization	$ 14,249	$ 14,150
Indefinite-lived intangible assets	108	160
Total	$ 14,357	$ 14,310