Loss per share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic and diluted:
Net loss attributable to Veoneer	$ (94)	$ (132)	$ (298)	$ (454)
Denominator:
Weighted average number of shares outstanding (in millions)	111,960	111,590	111,830	111,550
Diluted: Weighted-average number of shares outstanding, assuming dilution (in millions) (in shares)	111,960	111,590	111,830	111,550
Basic loss per share (in dollars per share)	$ (0.84)	$ (1.18)	$ (2.66)	$ (4.07)
Diluted loss per share (in dollars per share)	$ (0.84)	$ (1.18)	$ (2.66)	$ (4.07)