Restructuring Related Activities All (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			36 Months Ended	12 Months Ended															5 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011	Dec. 31, 2011 Employee Severance [Member]	Dec. 31, 2010 Employee Severance [Member]	Dec. 31, 2009 Employee Severance [Member]	Dec. 31, 2011 Accelerated Depreciation [Member]	Dec. 31, 2010 Accelerated Depreciation [Member]	Dec. 31, 2009 Accelerated Depreciation [Member]	Dec. 31, 2011 Transfer costs [Member]	Dec. 31, 2010 Transfer costs [Member]	Dec. 31, 2009 Transfer costs [Member]	Dec. 31, 2011 Impairment in Value of Asset [Member]	Dec. 31, 2010 Impairment in Value of Asset [Member]	Dec. 31, 2009 Impairment in Value of Asset [Member]	Dec. 31, 2011 Other Restructuring [Member]	Dec. 31, 2010 Other Restructuring [Member]	Dec. 31, 2009 Other Restructuring [Member]	Dec. 31, 2011 2011 Restructuring Plan [Member]	Dec. 31, 2011 2011 Restructuring Plan [Member] Employee Severance [Member]	Dec. 31, 2011 2011 Restructuring Plan [Member] Accelerated Depreciation [Member]	Dec. 31, 2011 2011 Restructuring Plan [Member] Transfer costs [Member]	Dec. 31, 2011 2011 Restructuring Plan [Member] Impairment in Value of Asset [Member]	Dec. 31, 2011 2011 Restructuring Plan [Member] Other Restructuring [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Cost Incurred to Date				$ 318																$ 35
Restructuring Charges	89	116	63	220	55	70	34								11	13	34	35	16
Restructuring Related Expenses	40	53	67	98				9	7	11	27	41	37				4	5	1
Restructuring and Related Cost, Incurred Cost					$ 55	$ 70	$ 34	$ 9	$ 7	$ 11	$ 27	$ 41	$ 37		$ 11	$ 13	$ 38	$ 40	$ 17		$ 21				$ 14