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Contingent liabilities and legal proceedings - Vodafone Idea (Details)
€ in Millions, ₨ in Billions
12 Months Ended
Feb. 07, 2023
EUR (€)
Feb. 07, 2023
INR (₨)
Mar. 31, 2023
EUR (€)
Mar. 31, 2023
INR (₨)
Mar. 31, 2022
EUR (€)
Mar. 31, 2021
EUR (€)
Mar. 31, 2021
INR (₨)
Mar. 31, 2020
EUR (€)
Sep. 30, 2019
EUR (€)
Disclosure of contingent liabilities [line items]                  
Investment in joint ventures     € 9,578   € 3,781        
Vodafone Idea Limited | Government of India                  
Disclosure of contingent liabilities [line items]                  
Issue of equity € 1,800 ₨ 161              
Vodafone Idea Limited                  
Disclosure of contingent liabilities [line items]                  
Moratorium on spectrum and AGR payments     4 years            
Investment in joint ventures     € 0         € 0 € 0
Share of losses in respect to joint venture     0            
Vodafone Idea and Idea Cellular legal case [Member] | Vodafone Idea Limited                  
Disclosure of contingent liabilities [line items]                  
Payments made under mechanism           € 235 ₨ 19    
Maximum [Member] | Vodafone Idea and Idea Cellular legal case [Member]                  
Disclosure of contingent liabilities [line items]                  
The group's potential exposure     € 719 ₨ 64