NET LOSS PER SHARE - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator
Net loss attributable to Rivian	$ (4,688)	$ (1,018)	$ (426)
Less: Premium on repurchase of convertible preferred stock	0	(1)	0
Net loss attributable to common stockholders, basic and diluted	(4,688)	(1,019)	(426)
Net loss attributable to common stockholders, basic and diluted	$ (4,688)	$ (1,019)	$ (426)
Denominator
Weighted average common shares outstanding - basic (in shares)	204,000,000	101,000,000	98,000,000
Effect of dilutive securities - warrants, nonvested RSUs, stock options, convertible notes (in shares)	0	0	0
Weighted average common shares outstanding - diluted (in shares)	204,000,000	101,000,000	98,000,000
Net loss per share attributable to common stockholders, basic (in USD per share)	$ (22.98)	$ (10.09)	$ (4.35)