Schedule I - Condensed Financial information of Parent (Coupang, Inc.) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net cash (used in) provided by operating activities	$ (410,578)	$ 301,554	$ (311,843)
Investing activities:
Net cash used in investing activities	(675,525)	(520,654)	(218,224)
Financing activities:
Repurchase of common units and preferred units	0	(97,043)	(114,610)
Deferred offering costs paid	(11,618)	0	0
Proceeds from issuance of common stock/units, equity-based compensation plan	62,281	28,613	1,516,378
Repayment of short-term borrowings	(166,023)	(2,983)	(346,349)
Net cash provided by financing activities	3,576,850	178,502	1,184,104
Cash and cash equivalents:
Net increase in cash and cash equivalents, and restricted cash	2,409,045	29,767	631,625
Cash and cash equivalents, and restricted cash, as of beginning of period	1,401,302	1,371,535	739,910
Cash and cash equivalents, and restricted cash, as of end of period	3,810,347	1,401,302	1,371,535
Parent Company
Operating activities:
Net cash (used in) provided by operating activities	(57,783)	(7,587)	7,429
Investing activities:
Capital contribution to subsidiaries	(1,273,629)	(184,490)	(2,044,205)
Return of capital contribution from subsidiaries	202,834	253,921	817,977
Net cash used in investing activities	(1,070,795)	69,431	(1,226,228)
Financing activities:
Repurchase of common units and preferred units	0	(97,043)	(114,610)
Proceeds from issuance of common units and preferred units, net of issuance costs	3,431,277	28,613	1,516,378
Deferred offering costs paid	(11,618)	0	0
Proceeds from issuance of common stock/units, equity-based compensation plan	62,281	0	0
Repayment of short-term borrowings	0	0	(200,000)
Other, net	(1,663)	0	0
Net cash provided by financing activities	3,480,277	(68,430)	1,201,768
Cash and cash equivalents:
Net increase in cash and cash equivalents, and restricted cash	2,351,699	(6,586)	(17,031)
Cash and cash equivalents, and restricted cash, as of beginning of period	6,336	12,922	29,953
Cash and cash equivalents, and restricted cash, as of end of period	$ 2,358,035	$ 6,336	$ 12,922