Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 25,666	$ 26,195
Intangible assets subject to amortization	1,195	1,136
Other Intangible assets - Net	$ 1,195	$ 1,136