Schedule I - Condensed Financial information of Parent (Coupang, Inc.) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Net cash provided by (used in) operating activities	$ 2,652	$ 565	$ (411)
Investing activities
Increase of short-term loans	(25)	0	0
Net cash used in investing activities	(927)	(848)	(676)
Financing activities
Deferred offering costs paid	0	0	(12)
Proceeds from issuance of common stock/units, equity-based compensation plan	9	18	62
Net cash provided by financing activities	199	247	3,577
Cash and cash equivalents
Net increase (decrease) in cash and cash equivalents, and restricted cash	1,910	(123)	2,409
Cash and cash equivalents, and restricted cash, as of beginning of period	3,687	3,810	1,401
Cash and cash equivalents, and restricted cash, as of end of period	5,597	3,687	3,810
Parent company
Operating activities
Net cash provided by (used in) operating activities	95	(79)	(58)
Investing activities
Capital contribution to subsidiaries	(121)	(725)	(1,274)
Return of capital contribution from subsidiaries	61	80	204
Net cash used in investing activities	(85)	(645)	(1,070)
Financing activities
Proceeds from issuance of common units and preferred units, net of issuance costs	0	0	3,431
Deferred offering costs paid	0	0	(12)
Proceeds from issuance of common stock/units, equity-based compensation plan	9	18	62
Other, net	0	0	(1)
Net cash provided by financing activities	9	18	3,480
Cash and cash equivalents
Net increase (decrease) in cash and cash equivalents, and restricted cash	19	(706)	2,352
Cash and cash equivalents, and restricted cash, as of beginning of period	1,652	2,358	6
Cash and cash equivalents, and restricted cash, as of end of period	$ 1,671	$ 1,652	$ 2,358