Equity-based Compensation Plans - Schedule of Valuation Assumptions for Stock Options (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Intrinsic fair value of stock options exercised	$ 35	$ 57	$ 131

Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Grant Date Intrinsic Value, Amount

No definition available.

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Namespace Prefix:	cpng_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration