Restructuring Related Activities 2011 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	50 Months Ended	3 Months Ended	20 Months Ended	3 Months Ended	50 Months Ended	3 Months Ended	20 Months Ended	3 Months Ended	50 Months Ended	3 Months Ended	20 Months Ended	3 Months Ended	50 Months Ended	3 Months Ended	20 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2013 2011 Restructuring Plan [Member]	Mar. 31, 2013 2011 Restructuring Plan [Member]	Mar. 31, 2013 Termination Benefits [Member]	Mar. 31, 2013 Termination Benefits [Member]	Mar. 31, 2013 Termination Benefits [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Termination Benefits [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Transfer costs [Member]	Mar. 31, 2013 Transfer costs [Member]	Mar. 31, 2013 Transfer costs [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Transfer costs [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Other [Member]	Mar. 31, 2013 Other [Member]	Mar. 31, 2013 Other [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Other [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Minimum [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Minimum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Minimum [Member] Restructuring Plan [Member] Other [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Minimum [Member] Restructuring Related To Plan [Member] Other [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Maximum [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Maximum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 Maximum [Member] Restructuring Plan [Member] Other [Member] 2011 Restructuring Plan [Member]	Mar. 31, 2013 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																	$ 300	$ 185	$ 70	$ 45	$ 355	$ 210	$ 90	$ 55
Restructuring and Related Cost, Cost Incurred to Date		490		201
Restructuring plan estimated future cash outflow																	270				300
Payments for Restructuring	$ 47	$ 422	$ 46	$ 174	$ 23	$ 204	$ 22	$ 85	$ 0	$ 73			$ 24	$ 145	$ 24	$ 89