v3.26.3
Income Taxes - Additional Information (Detail)
$ / shares in Units, ¥ in Thousands, $ in Thousands, $ in Millions
 12 Months Ended
May 31, 2026
USD ($)
$ / shares
May 31, 2026
HKD ($)
May 31, 2026
CNY (¥)
May 31, 2025
USD ($)
$ / shares
May 31, 2024
USD ($)
$ / shares
May 31, 2019
USD ($)
May 31, 2019
HKD ($)
May 31, 2016
Income Taxes [Line Items]                
Effective income tax rate 25.00% 25.00% 25.00% 25.00% 25.00%      
Assessable profit $ 516,661     $ 375,833 $ 325,218      
Income tax rate 26.80% 26.80% 26.80%          
Valuation allowance $ 248,984     263,230        
Net operating loss 1,098,377              
Withholding tax, dividends paid by PRC schools and subsidiaries to their foreign investors               10.00%
Aggregate undistributed earnings available for distribution 3,126,185     2,536,432        
Unrecognized tax benefits 0     0 0      
Provision for income taxes 196,111     146,294 109,690      
Increase in income tax expenses $ 15,157     $ 13,351 $ 11,149      
Decrease in net income/(loss) per share—basic | $ / shares $ 0.01     $ 0.01 $ 0.01      
Decrease in net income/(loss) per share—diluted | $ / shares $ 0.01     $ 0.01 $ 0.01      
Dividends $ 189,774     $ 98,197        
Payment of taxes witheld on dividend $ 7,342     18,592 $ 4,227      
UNITED STATES | Walkite [Member]                
Income Taxes [Line Items]                
Effective income tax rate 21.00% 21.00% 21.00%          
State income tax rate 8.80% 8.80% 8.80%          
UNITED KINGDOM | Walkite [Member]                
Income Taxes [Line Items]                
Income tax rate 19.00% 19.00% 19.00%          
AUSTRALIA                
Income Taxes [Line Items]                
Income tax rate 30.00% 30.00% 30.00%          
CANADA                
Income Taxes [Line Items]                
Effective income tax rate 15.00% 15.00% 15.00%          
Income tax rate 11.50% 11.50% 11.50%          
JAPAN | New Oriental Vision Overseas Japan [Member]                
Income Taxes [Line Items]                
Effective income tax rate 23.20% 23.20% 23.20%          
Elite and Smart Shine [Member]                
Income Taxes [Line Items]                
Dividends $ 133,769     $ 421,471 0      
Minimum [Member]                
Income Taxes [Line Items]                
Underpayment of tax liability $ 16,000   ¥ 100          
Beijing Hewstone, Shanghai Smart Words, Beijing Smart Wood and Beijing Pioneer [Member]                
Income Taxes [Line Items]                
Withholding tax paid for the dividend           $ 5    
Hainan Dongfang Zhixin Technology Company Limited, Zhuhai Zekai Software Technology Company Limited, Zhuhai Chongshengheli Network Technology Co., Ltd. and Tibet Tianli [Member]                
Income Taxes [Line Items]                
Eit preferential tax rate percentage 15.00% 15.00% 15.00%          
High and new tech enterprise (HNTE) [Member] | Beijing Decision Beijing Hewstone And Xuncheng [Member]                
Income Taxes [Line Items]                
Income tax rate       15.00%        
High and new tech enterprise (HNTE) [Member] | Beijing Zhiyuan And Beijing Chuangying [Member]                
Income Taxes [Line Items]                
Income tax rate       15.00%        
Newly established software enterprise (NESE) [Member] | Beijing Decision Beijing Hewstone And Xuncheng [Member]                
Income Taxes [Line Items]                
Preferential tax rate 12.50% 12.50% 12.50%          
Tax holiday year 2 years 2 years 2 years          
Income tax holiday, description Enterprises that qualify as the newly established software enterprise (“NESE”) are exempt from the EIT for two years beginning the enterprise’s first profitable year followed by a tax rate of 12.5% for the succeeding three years. Enterprises that qualify as the newly established software enterprise (“NESE”) are exempt from the EIT for two years beginning the enterprise’s first profitable year followed by a tax rate of 12.5% for the succeeding three years. Enterprises that qualify as the newly established software enterprise (“NESE”) are exempt from the EIT for two years beginning the enterprise’s first profitable year followed by a tax rate of 12.5% for the succeeding three years.          
Peoples Republic Of China Entities [Member]                
Income Taxes [Line Items]                
Income tax rate 25.00% 25.00% 25.00%          
Variable interest entities (VIEs) [Member]                
Income Taxes [Line Items]                
Income tax rate 25.00% 25.00% 25.00%          
Hong Kong [Member]                
Income Taxes [Line Items]                
Assessable profit   $ 2         $ 2  
Income tax rate 16.50% 16.50% 16.50%     8.25% 8.25%  
Hong Kong [Member] | Smart Shine [Member]                
Income Taxes [Line Items]                
Provision for income taxes       $ 1,738        
Hong Kong [Member] | Hong Kong New Oriental Vision Overseas Limited                
Income Taxes [Line Items]                
Provision for income taxes $ 251     377        
Hong Kong [Member] | Blingabc Limited [Member]                
Income Taxes [Line Items]                
Provision for income taxes 969     969        
Hong Kong [Member] | Major Subsidiaries of the Company [Member]                
Income Taxes [Line Items]                
Provision for income taxes 0     0 $ 0      
Hong Kong [Member] | Elite Concept [Member]                
Income Taxes [Line Items]                
Provision for income taxes $ 2,965     $ 2,239        
Earliest Tax Year [Member]                
Income Taxes [Line Items]                
Net operating loss expiration dates       May 31, 2026        
Latest Tax Year [Member]                
Income Taxes [Line Items]                
Net operating loss expiration dates       May 31, 2031