Noncontrolling Interests (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Activity for equity attributable to noncontrolling interests
Balance at January 1	$ 137,832		$ 122,181
Net Income	21,597		26,336		27,008
Balance at December 31	150,427		137,832		122,181
Noncontrolling Interest
Activity for equity attributable to noncontrolling interests
Balance at January 1	1,308		799		730
Net Income	174		157		113
Distributions to noncontrolling interests	(99)		(41)		(71)
Other changes, net	(69)	[1]	393	[1]	27	[1]
Balance at December 31	$ 1,314		$ 1,308		$ 799

[1] Includes components of comprehensive income, which are disclosed separately in the Consolidated Statement of Comprehensive Income.