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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Warranty [Table Text Block]
The estimate of our future warranty and field service action costs, net of estimated supplier recoveries, for the periods ended June 30 was as follows (in millions):
 
First Half
 
2019
 
2020
Beginning balance
$
5,137

 
$
5,702

Payments made during the period
(2,192
)
 
(1,945
)
Changes in accrual related to warranties issued during the period
1,424

 
1,253

Changes in accrual related to pre-existing warranties
715

 
1,183

Foreign currency translation and other
23

 
(112
)
Ending balance
$
5,107

 
$
6,081