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Contingent liabilities and legal proceedings - Contingent liabilities and UK pension schemes (Details)
€ in Millions, ₨ in Billions, $ in Billions
1 Months Ended 12 Months Ended
Mar. 31, 2023
EUR (€)
item
Mar. 31, 2023
EUR (€)
item
Mar. 31, 2023
USD ($)
item
Mar. 31, 2023
INR (₨)
item
Mar. 31, 2022
EUR (€)
Mar. 31, 2022
USD ($)
Mar. 31, 2022
INR (₨)
Contingent liabilities and legal proceedings - Conti              
Amount committed to contribute         € 140    
OXG Glasfaser GmbH              
Contingent liabilities and legal proceedings - Conti              
Joint venture ownership interest   50.00%          
OXG Glasfaser GmbH | Altice Luxembourg S.A              
Contingent liabilities and legal proceedings - Conti              
Joint venture ownership interest 50.00%            
Amount committed to contribute € 950 € 950          
Performance bonds              
Contingent liabilities and legal proceedings - Conti              
The group's potential exposure 504 € 504     430    
Other contingent liabilities | Vodafone Hutchison Australia Pty Limited              
Contingent liabilities and legal proceedings - Conti              
Joint venture ownership interest   50.00%          
Loan facility covered under guarantee by group company | $     $ 3.5     $ 3.5  
Other contingent liabilities | Indus Towers Limited [Member]              
Contingent liabilities and legal proceedings - Conti              
Exposure from guarantee contracts | ₨             ₨ 42.5
Other guarantees              
Contingent liabilities and legal proceedings - Conti              
The group's potential exposure 2,877 € 2,877     2,436    
Probable cash outflow under the payment mechanism   267          
Other guarantees | Indus Towers Limited [Member]              
Contingent liabilities and legal proceedings - Conti              
Exposure from guarantee contracts 476 476   ₨ 42.5 € 504    
UK pension schemes              
Contingent liabilities and legal proceedings - Conti              
Notional value of security 114 114          
UK pension schemes, Vodafone Section              
Contingent liabilities and legal proceedings - Conti              
Exposure from guarantee contracts € 1,420 € 1,420          
Number of guarantees under pension scheme | item 2 2 2 2      
UK pension schemes, CWW Section              
Contingent liabilities and legal proceedings - Conti              
Exposure from guarantee contracts € 1,420 € 1,420          
THUS Plc Group Scheme              
Contingent liabilities and legal proceedings - Conti              
Exposure from guarantee contracts € 114 € 114