Joint Ventures (Detail) (USD $)	12 Months Ended						60 Months Ended			1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 VCE Company LLC	Dec. 31, 2011 VCE Company LLC	Dec. 31, 2010 VCE Company LLC	Dec. 31, 2012 VCE Company LLC	Dec. 31, 2012 LenovoEMC	Dec. 31, 2012 Other assets, net LenovoEMC	Jan. 31, 2013 Subsequent Event VCE Company LLC
Schedule of Equity Method Investments [Line Items]
Capital contribution	$ 227,881,000	$ 383,211,000	$ 29,600,000				$ 676,100,000			$ 95,000,000
Accumulated stock-based compensation contributed to joint venture							13,900,000
Consolidated ownership perentage of outstanding equity				58.00%			58.00%
Consolidated share of losses				63.20%		58.00%
Loss From VCE				244,900,000	209,200,000	43,000,000	498,200,000
Revenue recognized from sales to VCE			0	285,800,000	133,900,000
Receivable from joint venture				44,300,000	27,000,000		44,300,000
Joint venture, ownership interest percentage								49.00%
Investment in joint venture, at fair value	$ 32,745,000								$ 32,745,000