v3.26.1
Taxation - Additional information (Details) - EUR (€)
€ in Millions
 6 Months Ended 12 Months Ended
Apr. 01, 2026
Jul. 14, 2025
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Taxation            
Unused Tax Losses Available for Carryforward     € 130,045 € 130,045 € 134,596  
Unremitted earnings of subsidiaries for which no deferred tax liability has been recognised     33,631 33,631 39,199  
Losses for which no deferred tax is recognised     53,999 53,999 56,483  
Deferred tax assets     18,068 18,068 19,033  
Unused tax losses for which no deferred tax asset recognised     53,999 53,999 56,483  
Current tax charge       412 48 € (577)
LUXEMBOURG            
Taxation            
Unused Tax Losses Available for Carryforward     63,881 € 63,881 € 65,200  
Percentage of deferred tax assets       2.00%    
Cash flow projection period to determine recoverable tax losses       5 years    
Applicable tax rate         1.00%  
LUXEMBOURG | Not later than 10 years            
Taxation            
Percentage of deferred tax expected to be used       (21.00%)    
Deferred tax assets     3,145 € 3,145 € 3,065  
LUXEMBOURG | Not later than 20 years            
Taxation            
Percentage of deferred tax expected to be used       (41.00%)    
Deferred tax assets     6,319 € 6,319 6,194  
Period over which tax losses are expected to be fully utilised       40 years    
LUXEMBOURG | Tax losses on tax deductible impairments following Luxembourg tax reform            
Taxation            
Taxe losses in current year       € 1,319    
Additional tax losses disposal of investments       € 15,958 15,958  
Tax loss carryforward expiration period       17 years    
Increase (decrease) in deferred tax liability (asset)       € 640 719  
LUXEMBOURG | Tax losses            
Taxation            
Deferred tax assets     15,248 15,248 15,563  
GERMANY            
Taxation            
Deferred tax assets     1,441 1,441 1,950  
Description Of Change In Tax Rate   German Government enacted a 5% reduction in the corporate income tax rate, to be implemented on a staggered basis at 1% per annum from 2028 to 2032. The enacted rate change resulted in a €305 million charge to remeasure the German net deferred tax assets.        
UK            
Taxation            
Losses for which no deferred tax is recognised     29,087 29,087 29,762  
Deductible temporary differences for which no deferred tax asset is recognised     1,432 1,432 0  
Deferred tax assets     0 € 0 2,566  
Cash flow projection period to determine recoverable tax losses       5 years    
Unused tax losses for which no deferred tax asset recognised     29,087 € 29,087 29,762  
Current tax charge       9 7  
Deferred Tax Expense Arising From Writedown Of Deferred Tax Asset     358 358    
Deferred Tax Assets Recoverable From Reversal Of Deferred Tax Liabilities     437 437    
Unrecognised Interest Restriction Carryforward     2,040 2,040 1,916  
UK | Vodafone Three [Member]            
Taxation            
Losses for which no deferred tax is recognised     7,615 7,615    
Deferred tax assets     € 2,067 € 2,067 € 0  
Cash flow projection period to determine recoverable tax losses       5 years    
Period Over Which Deferred Tax Asset Are Expected To Be Fully Recovered     30 years 46 years    
Unused tax losses for which no deferred tax asset recognised     € 7,615 € 7,615    
Minimum | LUXEMBOURG            
Taxation            
Period over which tax losses are expected to be fully utilised       46 years 47 years  
Percentage of reasonably possible increase or decrease in forecast income       5.00%    
Increase or decrease in tax loss utilisation period based on reasonably possible increase or decrease in forecast income       2 years    
Applicable tax rate       1.00% 1.00%  
Minimum | LUXEMBOURG | Internal financing, centralised procurement, and international roaming activities            
Taxation            
Annual taxable profit consistently generated       € 1    
Minimum | GERMANY            
Taxation            
Period over which trading tax losses are expected to be fully utilised       4 years    
Period over which corporate tax losses are expected to be fully utilised       31 years    
Minimum | UK            
Taxation            
Percentage of reasonably possible increase or decrease in forecast income 18.00%     5.00%    
Increase or decrease in tax loss utilisation period based on reasonably possible increase or decrease in forecast income       1 year    
Minimum | UK | Vodafone Three [Member]            
Taxation            
Increase or decrease in tax loss utilisation period based on reasonably possible increase or decrease in forecast income       1 year    
Period over which corporate tax losses are expected to be fully utilised       1 year    
Maximum | LUXEMBOURG            
Taxation            
Expiration period of group's tax losses       14 years    
Period over which tax losses are expected to be fully utilised       50 years 52 years  
Percentage of reasonably possible increase or decrease in forecast income       10.00%    
Maximum | GERMANY            
Taxation            
Increase or decrease in tax loss utilisation period based on reasonably possible increase or decrease in forecast income       5 years    
Period over which trading tax losses are expected to be fully utilised       5 years    
Period over which corporate tax losses are expected to be fully utilised       32 years    
Maximum | UK            
Taxation            
Percentage of reasonably possible increase or decrease in forecast income 14.00%     (10.00%)    
Maximum | UK | Vodafone Three [Member]            
Taxation            
Period over which corporate tax losses are expected to be fully utilised       2 years