Restructuring Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 9
Number of positions eliminated	31
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	6
Reserve, current		3
Facilities-related [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	1
Reserve, current		1
Asset impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	1
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 1