Restructuring Related Activities 2010 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		38 Months Ended	3 Months Ended		26 Months Ended	3 Months Ended		38 Months Ended	3 Months Ended		26 Months Ended	3 Months Ended						38 Months Ended	3 Months Ended		26 Months Ended	3 Months Ended						38 Months Ended	3 Months Ended		26 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2012 2010 Restructuring Plan [Member]	Mar. 31, 2011 2010 Restructuring Plan [Member]	Mar. 31, 2012 2010 Restructuring Plan [Member]	Mar. 31, 2012 Termination Benefits [Member]	Mar. 31, 2011 Termination Benefits [Member]	Mar. 31, 2012 Termination Benefits [Member]	Mar. 31, 2012 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2011 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Accelerated depreciation [Member]	Mar. 31, 2011 Accelerated depreciation [Member]	Mar. 31, 2012 Accelerated depreciation [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2011 Accelerated depreciation [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Transfer costs [Member]	Mar. 31, 2011 Transfer costs [Member]	Mar. 31, 2012 Transfer costs [Member]	Mar. 31, 2012 Transfer costs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2011 Transfer costs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Transfer costs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Fixed asset write-offs [Member]	Mar. 31, 2011 Fixed asset write-offs [Member]	Mar. 31, 2012 Fixed asset write-offs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2011 Fixed asset write-offs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Other [Member]	Mar. 31, 2011 Other [Member]	Mar. 31, 2012 Other [Member]	Mar. 31, 2012 Other [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2011 Other [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Other [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Minimum [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Minimum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Minimum [Member] Restructuring Plan [Member] Fixed asset write-offs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Minimum [Member] Restructuring Plan [Member] Other [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Minimum [Member] Restructuring Related To Plan [Member] Other [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Maximum [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Maximum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Maximum [Member] Restructuring Plan [Member] Fixed asset write-offs [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Maximum [Member] Restructuring Plan [Member] Other [Member] 2010 Restructuring Plan [Member]	Mar. 31, 2012 Maximum [Member] Restructuring Related To Plan [Member] Other [Member] 2010 Restructuring Plan [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			$ 335			$ 158
Impact of restructuring costs on the accompanying financial statements
Restructuring plan estimated future cash outflow																																	150					160
Cash payments associated with restructuring initiatives	36		259	2		142	22		112	2		86					4		71								10		76			56
Restructuring and Related Cost, Incurred Cost	17	50		(1)	38		(1)	28		(2)	27			3			4	8									14	11		1	11
Expected total costs associated with the plan																																	$ 165	$ 95	$ 10	$ 50	$ 10	$ 185	$ 100	$ 15	$ 55	$ 15