Restructuring Related Activities 2010 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		44 Months Ended	3 Months Ended		9 Months Ended		32 Months Ended	3 Months Ended		9 Months Ended		44 Months Ended	3 Months Ended		9 Months Ended		32 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		44 Months Ended	3 Months Ended		9 Months Ended		32 Months Ended	3 Months Ended		9 Months Ended		44 Months Ended	3 Months Ended		9 Months Ended		32 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2012 2010 Restructuring Plan [Member]	Sep. 30, 2011 2010 Restructuring Plan [Member]	Sep. 30, 2012 2010 Restructuring Plan [Member]	Sep. 30, 2011 2010 Restructuring Plan [Member]	Sep. 30, 2012 2010 Restructuring Plan [Member]	Sep. 30, 2012 Termination Benefits [Member]	Sep. 30, 2011 Termination Benefits [Member]	Sep. 30, 2012 Termination Benefits [Member]	Sep. 30, 2011 Termination Benefits [Member]	Sep. 30, 2012 Termination Benefits [Member]	Sep. 30, 2012 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Accelerated depreciation [Member]	Sep. 30, 2011 Accelerated depreciation [Member]	Sep. 30, 2012 Accelerated depreciation [Member]	Sep. 30, 2011 Accelerated depreciation [Member]	Sep. 30, 2012 Accelerated depreciation [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Accelerated depreciation [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Accelerated depreciation [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Accelerated depreciation [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Transfer costs [Member]	Sep. 30, 2011 Transfer costs [Member]	Sep. 30, 2012 Transfer costs [Member]	Sep. 30, 2011 Transfer costs [Member]	Sep. 30, 2012 Transfer costs [Member]	Sep. 30, 2012 Transfer costs [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Transfer costs [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Transfer costs [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Transfer costs [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Transfer costs [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Other [Member]	Sep. 30, 2011 Other [Member]	Sep. 30, 2012 Other [Member]	Sep. 30, 2011 Other [Member]	Sep. 30, 2012 Other [Member]	Sep. 30, 2012 Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Impairment of an asset in value [Member]	Sep. 30, 2011 Impairment of an asset in value [Member]	Sep. 30, 2012 Impairment of an asset in value [Member]	Sep. 30, 2011 Impairment of an asset in value [Member]	Sep. 30, 2012 Impairment of an asset in value [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Impairment of an asset in value [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Impairment of an asset in value [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2011 Impairment of an asset in value [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Plan [Member] Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Plan [Member] Impairment of an asset in value [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Minimum [Member] Restructuring Related To Plan [Member] Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] Restructuring Plan [Member] Termination Benefits [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] Restructuring Plan [Member] Other [Member] 2010 Restructuring Plan [Member]	Sep. 30, 2012 Maximum [Member] Restructuring Plan [Member] Impairment of an asset in value [Member] 2010 Restructuring Plan [Member]	Sep. 30, 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					$ 424					$ 160
Impact of restructuring costs on the accompanying financial statements
Restructuring plan estimated future cash outflow																																																									150					160
Cash payments associated with restructuring initiatives	24		89		315	1		4		144	13		49		141	1		4		88									1		7		73						10		33		101					56
Restructuring and Related Cost, Incurred Cost	58	29	108	109		2	15	3	15		44	12	64	49		2	9		9			2		8					1	5	7	20							13	10	37	32			6	3	6
Expected total costs associated with the plan																																																									$ 165	$ 95	$ 50	$ 10	$ 10	$ 185	$ 100	$ 55	$ 15	$ 15