Schedule I - Condensed Financial information of Parent (Coupang, Inc.) - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,487,708	$ 1,251,455
Other current assets	232,447	211,848
Total current assets	5,636,806	2,840,714
Total assets	8,641,834	5,067,332
Current liabilities:
Other current liabilities	266,709	212,477
Total current liabilities	4,744,288	3,732,710
Convertible notes	0	589,851
Total liabilities	6,465,877	5,670,583
Redeemable convertible preferred units	0	3,465,611
Stockholders'/members' equity (deficit)
Common units	0	45,122
Class A and Class B common stock	175	0
Additional paid-in capital	7,874,038	25,036
Accumulated other comprehensive loss	(47,739)	(31,093)
Accumulated deficit	(5,650,517)	(4,107,927)
Total stockholders'/members' equity (deficit)	2,175,957	(4,068,862)	$ (3,532,912)	$ (2,772,326)
Total liabilities, redeemable convertible preferred units and stockholders'/members' equity (deficit)	8,641,834	5,067,332
Parent Company
Current assets:
Cash and cash equivalents	2,358,035	6,336
Other current assets	46,386	527
Total current assets	2,404,421	6,863
Other long-term assets	1,426	0
Investment in subsidiaries	(145,577)	(7,245)
Total assets	2,260,270	(382)
Current liabilities:
Other current liabilities	84,313	13,018
Total current liabilities	84,313	13,018
Convertible notes	0	589,851
Total liabilities	84,313	602,869
Redeemable convertible preferred units	0	3,465,611
Stockholders'/members' equity (deficit)
Common units	0	45,122
Class A and Class B common stock	175	0
Additional paid-in capital	7,874,038	25,036
Accumulated other comprehensive loss	(47,739)	(31,093)
Accumulated deficit	(5,650,517)	(4,107,927)
Total stockholders'/members' equity (deficit)	2,175,957	(4,068,862)
Total liabilities, redeemable convertible preferred units and stockholders'/members' equity (deficit)	$ 2,260,270	$ (382)