Employee Separation / Asset Related Charges, Net (Schedule of 2012 Restructuring Program) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 136
Restructuring Program 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	136		161
Payments	(23)
Net translation adjustment	(2)
Employee Separation Costs [Member] | Restructuring Program 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	132		154
Payments	(20)
Net translation adjustment	(2)
Other Non-Personnel Charges [Member] | Restructuring Program 2012 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	4	[1]	7	[1]
Payments	(3)	[1]
Net translation adjustment	$ 0	[1]

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