Employee Separation / Asset Related Charges, Net (2014 Restructuring Program schedule) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 223
2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, payments	(39)
Restructuring reserve, Net translation adjustment	(6)
Restructuring Reserve	223		268
Employee Severance [Member] | 2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, payments	(38)
Restructuring reserve, Net translation adjustment	(6)
Restructuring Reserve	220		264
Other Non-Personnel Charges [Member] | 2014 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, payments	(1)	[1]
Restructuring reserve, Net translation adjustment	0	[1]
Restructuring Reserve	$ 3	[1]	$ 4	[1]

[1] Other non-personnel charges consist of contractual obligation costs.