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Commitments and Contingencies (Tables)
3 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Guarantee obligations [Table Text Block]
The maximum potential payments under guarantees and the carrying value of recorded liabilities related to guarantees were as follows(in millions):
 
September 30,
2012
 
December 31,
2011
Maximum potential payments
$
403

 
$
444

Carrying value of recorded liabilities related to guarantees
25

 
31

Warranty [Table Text Block]
Warranty accruals accounted for in Accrued liabilities and deferred revenue for the periods ended September 30 were as follows (in millions):
 
First Nine Months
 
2012
 
2011
Beginning balance
$
3,915

 
$
3,855

Payments made during the period
(1,675
)
 
(2,205
)
Changes in accrual related to warranties issued during the period
1,402

 
1,575

Changes in accrual related to pre-existing warranties
(17
)
 
426

Foreign currency translation and other
23

 
(26
)
Ending balance
$
3,648

 
$
3,625