Loss per share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net loss attributable to ordinary shareholders - basic	$ (161,190)	$ (96,412)	$ (381,517)	$ (492,646)
Net loss attributable to ordinary shareholders - diluted	$ (161,190)	$ (96,412)	$ (381,517)	$ (492,646)
Denominator:
Weighted average number of ordinary shares - basic (in shares)	959,085,960	950,354,320	957,439,910	921,748,380
Weighted average number of ordinary shares - diluted (in shares)	959,085,960	950,354,320	957,439,910	921,748,380
Net loss per share - basic (in dollars per share)	$ (0.17)	$ (0.10)	$ (0.40)	$ (0.53)
Net loss per share - diluted (in dollars per share)	$ (0.17)	$ (0.10)	$ (0.40)	$ (0.53)