Restructuring (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 employees
Restructuring Cost and Reserve [Line Items]
Reduction in employees	200
Effect of cost savings	$ 10
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected costs	6
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected costs	$ 8