Realignment Charges (Schedule of Restructuring Reserve) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Reserve [Roll Forward]
Realignment Charges	[1]	$ (2)	$ (1)	$ 21	$ (1)
Restructuring Reserve, End of Period		2		2
Employee Severance
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning of Period				8
Realignment Charges				21
Utilization				(27)
Restructuring Reserve, End of Period		$ 2		$ 2

[1] Includes stock-based compensation as follows: Cost of license revenues $0 $1 $1 $2, Cost of services revenues $10 $11 $22 $20, Research and development $53 $66 $107 $126, Sales and marketing $43 $43 $81 $84, General and administrative $17 $18 $31 $35.