XML 11 R1.htm IDEA: XBRL DOCUMENT v3.21.2
Document and Entity Information
6 Months Ended
Jun. 30, 2021
Cover page.  
Document Type 6-K
Amendment Flag false
Document Period End Date Jun. 30, 2021
Current Fiscal Year End Date --12-31
Entity Registrant Name Sea Ltd
Entity Central Index Key 0001703399