Stockholders' Equity - Accumulated Other Comprehensive Loss, Net of Tax (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income Before Reclassifications	$ (76)	$ (19)
Income tax provision	868	772	918
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(51)	(12)
Accumulated other comprehensive income (loss), net	(366)	(239)	(208)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(127)	(31)
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income Before Reclassifications	(135)	(44)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Accumulated other comprehensive income (loss), net	(188)	(53)	(9)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(135)	(44)
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income Before Reclassifications	57	(22)
Income tax provision	31	18	37
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(39)	(11)
Accumulated other comprehensive income (loss), net	49	31	64
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	18	(33)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income Before Reclassifications	24	13
Income tax provision	(64)	(66)	(67)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(18)	(10)
Accumulated other comprehensive income (loss), net	(100)	(106)	(109)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	6	3
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income Before Reclassifications	(22)	34
Income tax provision	(70)	(61)	(87)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	6	9
Accumulated other comprehensive income (loss), net	(126)	(110)	(153)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(16)	43
Non-controlling Interest in VMware
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income Before Reclassifications	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Accumulated other comprehensive income (loss), net	(1)	(1)	(1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 0	$ 0