Loss per share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic and diluted:
Net loss attributable to Veoneer	$ (100)	$ (90)	$ (205)	$ (322)
Denominator:
Weighted average number of shares outstanding (in millions)	111,840	111,580	111,770	111,520
Diluted: Weighted-average number of shares outstanding, assuming dilution (in millions) (in shares)	111,840	111,580	111,770	111,520
Basic loss per share (in dollars per share)	$ (0.89)	$ (0.80)	$ (1.83)	$ (2.89)
Diluted loss per share (in dollars per share)	$ (0.89)	$ (0.80)	$ (1.83)	$ (2.89)