Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net (loss) income attributable to Coupang stockholders	$ (77)	$ 145	$ (72)	$ 236
Denominator:
Weighted-average shares used in computing net (loss) income per share attributable to Class A and Class B common stockholders, basic (in shares)	1,789	1,780	1,791	1,777
Dilutive effect of equity compensation awards (in shares)	0	21	0	20
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	1,789	1,800	1,791	1,797
Net income (loss) attributable to Class A and Class B common stockholders per share, basic (in USD per share)	$ (0.04)	$ 0.08	$ (0.04)	$ 0.13
Net income (loss) attributable to Class A and Class B common stockholders per share, diluted (in USD per share)	$ (0.04)	$ 0.08	$ (0.04)	$ 0.13
Share-based Payment Arrangement
Denominator:
Anti-dilutive shares (in shares)	34	4	28	5