Schedule I - Condensed Financial information of Parent (Coupang, Inc.) - Condensed Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Income Statements, Captions [Line Items]
Management service fee revenues	$ 24,383	$ 20,583	$ 18,406
Operating cost and expenses	(23,910)	(20,695)	(19,900)
Interest expense	(48)	(27)	(45)
Other expense, net	(19)	(7)	(12)
Income (loss) before income taxes	584	(93)	(1,542)
Income tax (benefit) expense	(776)	(1)	1
Net income (loss)	1,360	(92)	(1,543)
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of tax	(2)	9	41
Actuarial (loss) gain on defined severance benefits, net of tax	(18)	41	(57)
Total other comprehensive (loss) income	(20)	50	(16)
Comprehensive income (loss)	1,340	(42)	(1,559)
Parent company
Condensed Income Statements, Captions [Line Items]
Management service fee revenues	18	17	17
Operating cost and expenses	(400)	(324)	(349)
Interest expense	(2)	(2)	(22)
Other expense, net	84	28	2
Income (loss) before income taxes	(300)	(281)	(352)
Equity in earnings (losses) of subsidiaries	1,783	189	(1,191)
Income (loss) before income taxes	1,483	(92)	(1,543)
Income tax (benefit) expense	123	0	0
Net income (loss)	1,360	(92)	(1,543)
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of tax	(2)	9	41
Actuarial (loss) gain on defined severance benefits, net of tax	(18)	41	(57)
Total other comprehensive (loss) income	(20)	50	(16)
Comprehensive income (loss)	$ 1,340	$ (42)	$ (1,559)