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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2013
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):
 
June 30,
2013
 
December 31,
2012
Maximum potential payments
$
245

 
$
409

Carrying value of recorded liabilities related to guarantees
7

 
17

Warranty [Table Text Block]
Warranty accruals accounted for in Accrued liabilities and deferred revenue for the periods ended June 30 were as follows (in millions):
 
First Half
 
2013
 
2012
Beginning balance
$
3,656

 
$
3,915

Payments made during the period
(1,124
)
 
(1,103
)
Changes in accrual related to warranties issued during the period
1,048

 
1,084

Changes in accrual related to pre-existing warranties
157

 
43

Foreign currency translation and other
(68
)
 
(13
)
Ending balance
$
3,669

 
$
3,926