v2.4.0.6
Debt (Combined Schedule Of Current And Noncurrent Debt And Capital Lease Obligations) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Debt Instrument [Line Items]  
Debt maturing within one year, beginning balance $ 4,849
Long-term debt, beginning balance 50,303
Total, beginning balance 55,152
Repayments of long-term borrowings and capital leases obligations (1,828)
Decrease in short-term obligations, excluding current maturities (1,734)
Other 7
Debt maturing within one year, ending balance 3,121
Long-term debt, ending balance 48,476
Total, ending balance 51,597
Debt Maturing Within One Year [Member]
  
Debt Instrument [Line Items]  
Debt maturing within one year, beginning balance 4,849
Repayments of long-term borrowings and capital leases obligations (1,828)
Decrease in short-term obligations, excluding current maturities (1,734)
Reclassifications of long-term debt 1,750
Other 84
Debt maturing within one year, ending balance 3,121
Long-Term Debt [Member]
  
Debt Instrument [Line Items]  
Long-term debt, beginning balance 50,303
Reclassifications of long-term debt (1,750)
Other (77)
Long-term debt, ending balance $ 48,476