Asset Impairment, Exit, Implementation and Integration Costs (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			27 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Implementation (gain) costs	$ 1	$ (5)	$ 1
2011 Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Charges, inception-to-date				275
Severance cost				212
Other costs				63
Cash payments for restructuring and implementation	41	135	9	185
2011 Cost Reduction Program [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance liability		$ 37