Business, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Segment	Dec. 31, 2013	Jan. 02, 2014 Accounting Standards Update 2011-06 [Member]	Jan. 02, 2014 Accounting Standards Update 2013-11 [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of segments	6
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income tax liability	$ 8,906	$ 6,643		$ 277
Other Liabilities	24,178	23,168	57
Other Assets	$ 8,387	$ 8,369	$ 57