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Fair Value of Financial Assets and Liabilities (Tables)
 3 Months Ended
Mar. 29, 2020
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

The following table summarizes the estimated fair value and carrying amount of our financial instruments:
 
 
 
March 29, 2020
 
December 31, 2019
 
 
Fair value
hierarchy
 
Carrying
amount

 
Estimated
fair value

 
Carrying
amount

 
Estimated
fair value

Assets:
 
 
 
 
 
 
 
 
 
Money market funds
1
 
6

 
6

 
6

 
6

Other financial assets
2
 
42

 
42

 
42

 
42

Derivative instruments-assets
2
 
8

 
8

 
10

 
10

 
 
 
 
 
 
 
 
 
 
Liabilities:
 
 
 
 
 
 
 
 
 
Long-term debt (bonds)
2
 
(7,366
)
 
(7,534
)
 
(7,365
)
 
(7,922
)
Derivative instruments-liabilities
2
 
(11
)
 
(11
)
 
(1
)
 
(1
)