NET LOSS PER SHARE - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator
Net loss attributable to Rivian	$ (6,752,000,000)	$ (4,688,000,000)	$ (1,018,000,000)
Less: Premium on repurchase of convertible preferred stock	0	0	(1,000,000)
Net loss attributable to common stockholders, basic and diluted	(6,752,000,000)	(4,688,000,000)	(1,019,000,000)
Net loss attributable to common stockholders, basic and diluted	$ (6,752,000,000)	$ (4,688,000,000)	$ (1,019,000,000)
Denominator
Weighted-average Class A and Class B common shares outstanding - basic (in shares)	913	204	101
Effect of dilutive securities (in shares)	0	0	0
Weighted-average Class A and Class B common shares outstanding - diluted (in shares)	913	204	101
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (7.40)	$ (22.98)	$ (10.09)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (7.40)	$ (22.98)	$ (10.09)