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Restructuring and Other Items (Details 1) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Employee Severance [Member]
 
Restructuring Cost and Reserve [Line Items]  
Restructuring Reserve $ 49
Restructuring Charges 0
Restructuring Reserve, Settled with Cash (36)
Restructuring Reserve, Accrual Adjustment 0
Restructuring Reserve 13
Facility Closing [Member]
 
Restructuring Cost and Reserve [Line Items]  
Restructuring Reserve 77
Restructuring Charges 6
Restructuring Reserve, Settled with Cash (3)
Restructuring Reserve, Accrual Adjustment (5)
Restructuring Reserve $ 75