Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 26,195	$ 26,971	$ 26,902
Intangible assets subject to amortization	1,136	1,287
Other Intangible assets - Net	$ 1,136	$ 1,287