Summarized Condensed Financial Information of LivingSocial (Detail) (Living Social, USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Living Social
Statement of Operations:
Revenue	$ 372		$ 167
Operating expense	629		507
Impairment charge	496
Operating loss	(753)		(340)
Net loss	$ (503)	[1]	$ (375)	[1]

[1] The difference between the operating loss and net loss for the nine months ended September 30, 2012, is primarily due to the recognition of non-operating, non-cash gains on previously held equity positions in companies that LivingSocial acquired during Q1 2012.