Restructuring (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2013 Restructuring Plan, 2013 [Member]	Dec. 31, 2013 Restructuring Plan, 2013 [Member]	Dec. 31, 2012 Restructuring Plan, 2013 [Member] Positions	Dec. 31, 2012 Restructuring Plan, 2012 [Member] Positions	Dec. 31, 2013 Restructuring Plan, 2012 [Member]	Dec. 31, 2012 Restructuring Plan, 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Workforce reduction, positions			520	670
Restructuring charges paid	$ 10				$ 78	$ 15
Reserve accrual adjustment					7
Restructuring costs		$ 49				$ 68