XML 75 R66.htm IDEA: XBRL DOCUMENT

Segment, Geographic and Other Revenue Information - Narrative (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Operating_segments	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of operating segments (in operating segments)	5
Total assets	$ 187,398	$ 185,798

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References+ Details