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Warrant and restructuring (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring  
Schedule of Changes to warranty and restructuring liabilities

Warranty and after-sale service

Restructuring

Balance as of December 31, 2018

$

40

$

3

Obligations incurred

3

18

Payments/uses

(2)

(19)

Balance as of December 31, 2019

$

41

$

2

Obligations incurred

1

Payments/uses

(4)

(2)

Balance as of December 31, 2020

$

38

$