Restructuring Related Activities All (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		38 Months Ended	3 Months Ended											8 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2012 Employee Severance [Member]	Mar. 31, 2011 Employee Severance [Member]	Mar. 31, 2012 Accelerated Depreciation [Member]	Mar. 31, 2011 Accelerated Depreciation [Member]	Mar. 31, 2012 Transfer costs [Member]	Mar. 31, 2011 Transfer costs [Member]	Mar. 31, 2012 Impairment in Value of Asset [Member]	Mar. 31, 2011 Impairment in Value of Asset [Member]	Mar. 31, 2012 Other Restructuring [Member]	Mar. 31, 2011 Other Restructuring [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member] Employee Severance [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member] Accelerated Depreciation [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member] Transfer costs [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member] Impairment in Value of Asset [Member]	Mar. 31, 2012 2011 Restructuring Plan [Member] Other Restructuring [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			$ 335												$ 50
Restructuring Charges	10	38	230	(1)	28							11	10
Restructuring Related Expenses	7	12	105				3	4	8			3	1
Restructuring and Related Cost, Incurred Cost	$ 17	$ 50		$ (1)	$ 28		$ 3	$ 4	$ 8			$ 14	$ 11	$ 15		$ 2				$ 13