Fair Value of Financial Assets and Liabilities - Changes In Fair Value of Level 3 Financial Assets (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Auction rate securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	$ (8)	$ 0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of the period	70	75
Calls at par value	(1)	(7)
Other-than-temporary impairment loss	(1)	(3)
Decrease in previously recognized unrealized losses included in other comprehensive income	0	5
Balance, end of the period	60	70
LenovoEMC
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of the period	33	0
Realized gain included in other income (expense), net	2	33
Balance, end of the period	$ 35	$ 33