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Appendix VI: Key Regulatory Issues and Concessions and Licenses Held by the Telefonica Group - Schedule of Service Concession Arrangements (Details)
 12 Months Ended
Dec. 31, 2023
mhz_frequency
MHz_band
GHz_spectrum_band
ghz_frequency
mhz_per_2100mhz_frequency
region
Disclosure of detailed information about service concession arrangements [line items]  
Frequency range owned by Telefonica (GHz) | GHz_spectrum_band 6
Expiring in 2041 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 20
Possible term extension 20 years
Expiring in 2041 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 40
Expiring in 2041 | Brazil | Maximum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 50
Expiring in 2041 | Colombia  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 15
Possible term extension 20 years
Regulatory operations, concessions extension 10 months
Expiring in 2031 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 800
Bandwidth (MHz) 20
Expiring in 2030 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 900
Bandwidth (MHz) 29.6
Expiring in 2030 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Expiring in 2030, Option 2 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,800
Bandwidth (MHz) 40
Expiring in 2030, Option 3 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 5
Expiring in 2030, Option 4 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,100
Bandwidth (MHz) 29.6
Expiring in 2030, Option 5 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 40
Expiring in 2030, Option 6 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 20
Expiring in 2030, Option 7 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 10
Amount of regions excluded in national license | region 2
Expiring in 2030, Option 8 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 40
Expiring in 2038 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 10
Expiring in 2038 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 30
Expiring in 2038 | Brazil | Maximum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 60
Expiring in 2038 | Chile  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 12
Expiring In 2038, Option 2 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 50
Indefinite, Option 1 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 20
Indefinite, Option 1 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 30
Indefinite, Option 1 | Chile  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Indefinite, Option 2 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 800
Bandwidth (MHz) 20
Indefinite, Option 2 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Indefinite, Option 3 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 900
Bandwidth (MHz) 34.8
Indefinite, Option 3 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 20
Indefinite, Option 4 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,800
Bandwidth (MHz) 11.6
Indefinite, Option 4 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 50
Indefinite, Option 5 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 5
Indefinite, Option 5 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 25
Indefinite, Option 6 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,100
Bandwidth (MHz) 20
Indefinite, Option 7 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,300
Bandwidth (MHz) 40
Indefinite, Option 8 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 25
Indefinite, Option 9 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 40
Indefinite, Option 10 | United Kingdom  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 40
Expiring in 2033 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 20
Expiring in 2033 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 20
Expiring in 2033 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_per_2100mhz_frequency 1,700
Bandwidth (MHz) 40
Expiring in 2033 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 40
Expiring in 2025 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 800
Bandwidth (MHz) 20
Expiring in 2033, Option 2 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 900
Bandwidth (MHz) 20
Expiring in 2033, Option 2 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_per_2100mhz_frequency 1,700
Bandwidth (MHz) 20
Expiring in 2033, Option 3 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,800
Bandwidth (MHz) 20
Expiring in 2025, Option 1 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,800
Bandwidth (MHz) 20
Expiring in 2025, Option 2 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 5
Expiring in 2025, Option 3 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,100
Bandwidth (MHz) 14.2
Expiring in 2040 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,100
Bandwidth (MHz) 10
Expiring in 2025, Option 4 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,100
Bandwidth (MHz) 30
Expiring in 2025, Option 5 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 60
Expiring in 2025, Option 6 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 20
Expiring in 2040, Option 2 | Germany  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 70
Expiring in 2027 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 450
Possible term extension 15 years
Initial term 15 years
Expiring in 2027 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 50
Expiring in 2027 | Venezuela  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Possible term extension 5 years
Expiring in 2029 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 20
Possible term extension 15 years
Initial term 15 years
Expiring in 2029 | Venezuela  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 40
Expiring in 2028 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Expiring in 2028 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 450
Bandwidth (MHz) 10
Expiring in 2023-2035 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 900
Expiring in 2023-2035 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 5
Expiring in 2023-2035 | Brazil | Maximum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 10
Expiring in 2023-2035, Option 2 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,800
Expiring in 2023-2035, Option 2 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 30
Regulatory operations, concessions and license bandwidth, regional 30
Expiring in 2023-2035, Option 2 | Brazil | Maximum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 65
Regulatory operations, concessions and license bandwidth, regional 65
Expiring in 2023 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,100
Possible term extension 15 years
Initial term 15 years
Expiring in 2023 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 30
Expiring in 2023 | Colombia  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_per_2100mhz_frequency 1,700
Bandwidth (MHz) 30
Expiring in 2023 | Ecuador  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Possible term extension 20 years
Regulatory operations, concessions extension 10 months
Expiring in 2041, Option 3 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,300
Possible term extension 20 years
Initial term 20 years
Expiring in 2041, Option 3 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 40
Expiring in 2041, Option 3 | Brazil | Maximum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 50
Expiring in 2027-2031 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,500
Possible term extension 15 years
Initial term 15 years
Additional Bandwith (MHz) 20
Expiring in 2027-2031 | Brazil | Minimum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 40
Expiring in 2027-2031 | Brazil | Maximum  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 60
Expiring In 2041, Option 1 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 100
Possible term extension 20 years
Initial term 20 years
Expiring In 2041, Option 2 | Brazil  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 26
Bandwidth (MHz) | GHz_spectrum_band 600
Possible term extension 20 years
Initial term 20 years
Expiring in 2035 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 30
Population in service area (as a percent) 65.00%
Expiring in 2045 | Chile  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 20
Expiring in 2045 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 40
Expiring in 2032 | Chile  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 20
Expiring in 2043 | Spain  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 26
Bandwidth (MHz) | GHz_spectrum_band 1,000
Expiring in 2043 | Argentina  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 50
Expiring in 2043 | Chile  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 2,600
Bandwidth (MHz) 40
Expiring in 2051 | Chile  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 50
Expiring in 2024 | Colombia  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Expiring in 2024 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 850
Bandwidth (MHz) 25
Expiring in 2024, Option 2 | Colombia  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 15
Expiring in 2024, Option 2 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 10
Expiring in 2023, Option 2 | Ecuador  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 60
Possible term extension 20 years
Regulatory operations, concessions extension 10 months
Expiring in 2036 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 30
Expiring in 2028, Option 2 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 900
Bandwidth (MHz) 10
Expiring in 2028, Option 3 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 900
Bandwidth (MHz) 16
Expiring in 2030, Option 1 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 25
Expiring in 2018 | Peru  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 25
Expiring in 2037 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 700
Bandwidth (MHz) 30
Expiring in 2026 | Venezuela  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | ghz_frequency 3.5
Bandwidth (MHz) | GHz_spectrum_band 50
Expiring in 2020 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Bandwidth (MHz) 10
Expiring in 2024-2047 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 20
Expiring in 2048 | Uruguay  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 3.5
Bandwidth (MHz) 100
Expiring in 2027, Option 1 | Venezuela  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_frequency 1,900
Bandwidth (MHz) 50
Possible term extension 5 years
Expiring in 2027, Option 2 | Venezuela  
Disclosure of detailed information about service concession arrangements [line items]  
Frequency | mhz_per_2100mhz_frequency 1,700
Bandwidth (MHz) 20
Possible term extension 5 years