Segment Information (Schedule Of Revenue from External Customers Attributed to Foreign Countries by Geographic Area) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 23,785	$ 22,130	$ 21,815	$ 18,893	$ 22,302	$ 20,008	$ 20,005	$ 19,383	$ 86,623	$ 81,698	$ 68,735
Non-U.S. [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									49,031	44,496	34,344
Asia, Other Than China [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									12,200	10,390	7,438
China [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									10,555	6,086	4,779
Europe [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									10,622	10,269	9,850
Middle East [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									9,165	10,285	5,477
Oceania [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,657	2,043	3,067
Canada [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,486	586	618
Africa [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									621	1,282	1,759
Latin America, Caribbean And Other [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									2,725	3,555	1,356
United States [member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 37,592	$ 37,202	$ 34,391