Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-40115
Entity Registrant Name	COUPANG, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-2810505
Entity Address, Address Line One	Tower 730, 570, Songpa-daero
Entity Address, City or Town	Songpa-gu
Entity Address, Region	Seoul
Entity Address, Country	KR
Entity Address, Postal Zip Code	05510
Country Region	+82
City Area Code	(2)
Local Phone Number	6150-5422
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	CPNG
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 19,980,728,143
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001834584
Documents incorporated by reference	Portions of the Registrant’s Proxy Statement for the 2022 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the Registrant’s fiscal year ended December 31, 2021.
Common Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,580,856,571
Common Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		174,802,990