Restructuring Related Activities 2011 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	44 Months Ended	3 Months Ended	9 Months Ended	15 Months Ended	3 Months Ended	9 Months Ended	44 Months Ended	3 Months Ended	9 Months Ended	15 Months Ended	3 Months Ended	9 Months Ended	44 Months Ended	3 Months Ended	9 Months Ended	15 Months Ended	3 Months Ended	9 Months Ended	44 Months Ended	3 Months Ended	9 Months Ended	15 Months Ended	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2012 2011 Restructuring Plan [Member]	Sep. 30, 2012 2011 Restructuring Plan [Member]	Sep. 30, 2012 2011 Restructuring Plan [Member]	Sep. 30, 2012 Termination Benefits [Member]	Sep. 30, 2012 Termination Benefits [Member]	Sep. 30, 2012 Termination Benefits [Member]	Sep. 30, 2012 Termination Benefits [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Termination Benefits [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Termination Benefits [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Transfer costs [Member]	Sep. 30, 2012 Transfer costs [Member]	Sep. 30, 2012 Transfer costs [Member]	Sep. 30, 2012 Transfer costs [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Transfer costs [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Transfer costs [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Other [Member]	Sep. 30, 2012 Other [Member]	Sep. 30, 2012 Other [Member]	Sep. 30, 2012 Other [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Other [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Other [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Plan [Member] Other [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Related To Plan [Member] Other [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] Restructuring Plan [Member] Other [Member] 2011 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] Restructuring Related To Plan [Member] Other [Member] 2011 Restructuring Plan [Member]
Estimated costs of restructuring program by major type of cost
Expected total costs associated with the plan																									$ 155	$ 125	$ 20	$ 10	$ 210	$ 150	$ 40	$ 20
Restructuring and Related Cost, Cost Incurred to Date			424			133
Restructuring plan estimated future cash outflow																									150				200
Payments for Restructuring	$ 24	$ 89	$ 315	$ 18	$ 57	$ 72	$ 13	$ 49	$ 141	$ 8	$ 24	$ 27	$ 1	$ 7	$ 73				$ 10	$ 33	$ 101	$ 10	$ 33	$ 45