Realignment Charges (Narrative) (Details) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2015 USD ($)	Mar. 31, 2015 Position	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | Position			350
Realignment Charges	[1]	$ (2)		$ (1)	$ 21	$ (1)
Restructuring Reserve		$ 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.