Schedule I - Condensed Financial information of Parent (Coupang, Inc.) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net cash (used in) provided by operating activities	$ 1,886	$ 2,652	$ 565
Investing activities
Increase of short-term loans	(95)	(25)	0
Net cash used in investing activities	(819)	(927)	(848)
Financing activities
Repurchase of Class A common stock	(178)	0	0
Proceeds from issuance of common stock, equity-based compensation plan	4	9	18
Proceeds from short-term borrowings and long-term debt	857	572	701
Net cash (used in) provided by financing activities	(69)	199	247
Cash and cash equivalents
Net increase (decrease) in cash and cash equivalents, and restricted cash	434	1,910	(123)
Cash and cash equivalents, and restricted cash, as of beginning of period	5,597	3,687	3,810
Cash and cash equivalents, and restricted cash, as of end of period	6,031	5,597	3,687
Parent company
Operating activities
Net cash (used in) provided by operating activities	(126)	95	(79)
Investing activities
Capital contribution to subsidiaries	(349)	(121)	(725)
Return of capital contribution from subsidiaries	90	61	80
Net cash used in investing activities	(354)	(85)	(645)
Financing activities
Repurchase of Class A common stock	(178)	0	0
Proceeds from issuance of common stock, equity-based compensation plan	4	9	18
Proceeds from short-term borrowings and long-term debt	(1)	0	0
Net cash (used in) provided by financing activities	(175)	9	18
Cash and cash equivalents
Net increase (decrease) in cash and cash equivalents, and restricted cash	(655)	19	(706)
Cash and cash equivalents, and restricted cash, as of beginning of period	1,671	1,652	2,358
Cash and cash equivalents, and restricted cash, as of end of period	$ 1,016	$ 1,671	$ 1,652