v3.26.3
Organization and Principal Activities - Details of Company's Major Subsidiaries and VIEs and Its Major Subsidiaries (Detail)
 12 Months Ended
May 31, 2026
New Oriental Education & Technology Group Co., Ltd [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Aug. 02, 2001
Place of incorporation (or establishment)/ operation PRC
Beijing New Oriental Xuncheng Network Technology Co., Ltd [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Mar. 11, 2005
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries of the Company [Member] | Beijing Decision Software Technology Company Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Apr. 20, 2005
Place of incorporation (or establishment)/ operation PRC
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | Beijing Hewstone Technology Company Limited ("Beijing Hewstone") [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Apr. 20, 2005
Place of incorporation (or establishment)/ operation PRC
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | Elite Concept Holdings Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Dec. 03, 2007
Place of incorporation (or establishment)/ operation Hong Kong
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | Winner Park Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Dec. 09, 2008
Place of incorporation (or establishment)/ operation Hong Kong
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | Smart Shine International Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Dec. 09, 2008
Place of incorporation (or establishment)/ operation Hong Kong
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | Beijing Pioneer Technology Company Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Jan. 08, 2009
Place of incorporation (or establishment)/ operation PRC
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | Beijing Smart Wood Software Technology Company Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Dec. 21, 2011
Place of incorporation (or establishment)/ operation PRC
Legal ownership 100.00%
Major Subsidiaries of the Company [Member] | East Buy (Formerly known as "Koolearn Technology Holding Limited") [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Feb. 07, 2018
Place of incorporation (or establishment)/ operation Cayman Islands
Legal ownership 55.61%
Major Subsidiaries of the Company [Member] | New Oriental Xuncheng Technology (HK) Limited [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Mar. 02, 2018
Place of incorporation (or establishment)/ operation Hong Kong
Legal ownership 55.61%
Major Subsidiaries of the Company [Member] | Beijing Dexin Dongfang Network Technology Co Ltd [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Mar. 21, 2018
Place of incorporation (or establishment)/ operation PRC
Legal ownership 55.61%
Major Subsidiaries and Schools of the VIEs [Member] | Beijing Haidian District Privately-Funded New Oriental School [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Oct. 05, 1993
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Hangzhou New Oriental Advanced Study School [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Jul. 21, 2005
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Guangzhou Haizhu District Privately-Funded New Oriental Training School [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Nov. 05, 2000
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Beijing New Oriental Dogwood Cultural Communications Co., Ltd [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition May 16, 2003
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Beijing New Oriental Vision Overseas Consultancy Co., Ltd [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Feb. 19, 2004
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Dongfang Optimization (Beijing) Technology Co., Ltd [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Oct. 27, 2021
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Oriental Selection (Beijing) Technology Co., Ltd. [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Dec. 07, 2021
Place of incorporation (or establishment)/ operation PRC
Major Subsidiaries and Schools of the VIEs [Member] | Beijing New Oriental Culture and Tourism Co., Ltd. [Member]  
Variable Interest Entities [Line Items]  
Date of incorporation or acquisition Jul. 19, 2023
Place of incorporation (or establishment)/ operation PRC