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Product Warranty (Tables)
 6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability [Table Text Block] The activity in warranty reserves for the three and six months ended June 30, 2020, and 2019, is summarized in the following table:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2020
 
2019
 
2020
 
2019
Beginning balance
$
8

 
$
13

 
$
8

 
$
14

Accrued to expense
—

 
1

 
1

 
1

Reduced to other operating credits and charges
—

 
(4
)
 
—

 
(4
)
Payments made
—

 
—

 
(1
)
 
(1
)
Total warranty reserves
8

 
9

 
8

 
9

Current portion of warranty reserves (included in other current liabilities)
(2
)
 
(2
)
 
(2
)
 
(2
)
Long-term portion of warranty reserves (included in other long-term liabilities)
$
6

 
$
7

 
$
6

 
$
7