Subsequent Events (Details) (Subsequent Event, USD $) In Millions, unless otherwise specified	1 Months Ended
	Jan. 31, 2013
Subsequent Event [Line Items]
Expected cost of restructuring	$ 80.0
VMware | Minimum
Subsequent Event [Line Items]
Expected cost of restructuring	90.0
Expected cost of restructuring, to be settled with cash	80.0
VMware | Maximum
Subsequent Event [Line Items]
Expected cost of restructuring	110.0
Expected cost of restructuring, to be settled with cash	90.0
Restructuring to Streamline Operations | VMware | Minimum
Subsequent Event [Line Items]
Expected cost of restructuring	70.0
Restructuring to Streamline Operations | VMware | Maximum
Subsequent Event [Line Items]
Expected cost of restructuring	80.0
Exit of Lines of Business | VMware | Minimum
Subsequent Event [Line Items]
Expected cost of restructuring	20.0
Exit of Lines of Business | VMware | Maximum
Subsequent Event [Line Items]
Expected cost of restructuring	30.0
Employee Severance [Member]
Subsequent Event [Line Items]
Expected cost of restructuring, to be settled with cash	$ 75.0