v2.4.0.6
Restructuring Costs (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]          
Restructuring costs incurred to date associated with divestitures   $ 202      
Restructuring charges 6   1    
Restructuring liabilities 57 30 57 45 82
Discontinued Operations [Member]
         
Restructuring Cost and Reserve [Line Items]          
Restructuring charges (8)   (2)    
Restructuring liabilities $ 10   $ 10