XML 254 R235.htm IDEA: XBRL DOCUMENT v3.25.0.1
Tax Matters - Tax Credits for Loss Carry-Forwards (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets € 6,240 € 4,884
Ending balance, deferred tax assets 6,673 6,240
Tax loss carryforwards generated in the tax group 5,426  
Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 2,803 2,011
Additions 552 1,047
Reversals (391) (311)
Translation differences and other (87) 56
Ending balance, deferred tax assets 2,877 2,803
Tax loss carryforwards generated in the tax group 3,439  
Spain    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 1,110  
Ending balance, deferred tax assets 1,277 1,110
Tax loss carryforwards generated in the tax group 113 77
Spain | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 1,110 457
Additions 183 725
Reversals (17) (75)
Translation differences and other 1 3
Ending balance, deferred tax assets 1,277 1,110
Germany    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 879  
Ending balance, deferred tax assets 970 879
Tax loss carryforwards generated in the tax group 5,168 5,295
Germany | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 879 810
Additions 234 189
Reversals (144) (120)
Translation differences and other 1 0
Ending balance, deferred tax assets 970 879
Latin America    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 814  
Ending balance, deferred tax assets 630 814
Tax loss carryforwards generated in the tax group 797 841
Latin America | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 814 741
Additions 135 133
Reversals (230) (113)
Translation differences and other (89) 53
Ending balance, deferred tax assets 630 814
Other | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance, deferred tax assets 0 3
Additions 0 0
Reversals 0 (3)
Translation differences and other 0 0
Ending balance, deferred tax assets 0 € 0
Telefónica Spain | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax loss carryforwards generated in the tax group 1,987  
Less than 1 year | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax loss carryforwards generated in the tax group 868  
Less than 1 year | Telefónica Spain | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax loss carryforwards generated in the tax group 0  
More than 1 year | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax loss carryforwards generated in the tax group 2,571  
More than 1 year | Telefónica Spain | Tax credits for loss carryforwards    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax loss carryforwards generated in the tax group € 1,987