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Appendix IV: Financial Instruments - Interest Rate Swaps (Details) - Interest rate swaps
€ in Millions
Dec. 31, 2017
EUR (€)
Non trading purposes | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (134)
Non trading purposes | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (3)
Non trading purposes | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (50)
Non trading purposes | Fixed to fix | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Fixed to fix | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 5
Non trading purposes | Fixed to floating | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.2637%
Average spread (as a percent) 0.44261%
Non trading purposes | Fixed to floating | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.67538%
Average spread (as a percent) 1.04085%
Non trading purposes | Fixed to floating | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.04098%
Average spread (as a percent) 0.38698%
Non trading purposes | Fixed to floating | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.45457%
Average spread (as a percent) 0.61877%
Non trading purposes | Fixed to floating | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.62908%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.98749%
Average spread (as a percent) 0.65977%
Non trading purposes | Fixed to floating | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.39588%
Average spread (as a percent) 1.52265%
Non trading purposes | Fixed to floating | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.25%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.3946%
Average spread (as a percent) 0.35677%
Non trading purposes | Fixed to floating | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.52265%
Average spread (as a percent) 1.61309%
Non trading purposes | Fixed to floating | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.363%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.68918%
Average spread (as a percent) 0.50567%
Non trading purposes | Fixed to floating | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.61309%
Average spread (as a percent) 1.68324%
Non trading purposes | Fixed to floating | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.75523%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.03801%
Average spread (as a percent) 1.00887%
Non trading purposes | Fixed to floating | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.72578%
Average spread (as a percent) 0.92195%
Non trading purposes | Fixed to floating | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 3.27197%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.26907%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 3.47088%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (1,010)
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (6)
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Fixed to floating | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (76)
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.2546%
Average spread (as a percent) 0.47843%
Non trading purposes | Floating to fixed | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.21735%
Average spread (as a percent) 1.70072%
Non trading purposes | Floating to fixed | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.86603%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.3847%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.90725%
Average spread (as a percent) 0.19602%
Non trading purposes | Floating to fixed | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.45435%
Average spread (as a percent) 0.00027%
Non trading purposes | Floating to fixed | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.7325%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.05811%
Average spread (as a percent) 0.02278%
Non trading purposes | Floating to fixed | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.5595%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.30378%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.925%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 1.83529%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.95086%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 2.52024%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 871
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 3
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Floating to fixed | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 26
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (370)
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (190)
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (5)
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (100)
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (75)
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to fix | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (282)
Average interest rate (as a percent) 0.00%
Non trading purposes | Receiving leg | Fixed to floating | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € (40,665)
Non trading purposes | Receiving leg | Fixed to floating | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (2,164)
Non trading purposes | Receiving leg | Fixed to floating | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (1,499)
Non trading purposes | Receiving leg | Fixed to floating | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (8,097)
Non trading purposes | Receiving leg | Fixed to floating | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (639)
Non trading purposes | Receiving leg | Fixed to floating | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (676)
Non trading purposes | Receiving leg | Fixed to floating | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (5,861)
Non trading purposes | Receiving leg | Fixed to floating | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (283)
Non trading purposes | Receiving leg | Fixed to floating | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (28)
Non trading purposes | Receiving leg | Fixed to floating | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (9,145)
Non trading purposes | Receiving leg | Fixed to floating | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (283)
Non trading purposes | Receiving leg | Fixed to floating | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (23)
Non trading purposes | Receiving leg | Fixed to floating | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (7,282)
Non trading purposes | Receiving leg | Fixed to floating | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (283)
Non trading purposes | Receiving leg | Fixed to floating | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (248)
Non trading purposes | Receiving leg | Fixed to floating | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (4,018)
Non trading purposes | Receiving leg | Fixed to floating | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (534)
Non trading purposes | Receiving leg | Fixed to floating | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (524)
Non trading purposes | Receiving leg | Fixed to floating | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (6,262)
Non trading purposes | Receiving leg | Fixed to floating | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (142)
Non trading purposes | Receiving leg | Fixed to floating | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Receiving leg | Fixed to floating | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (22,668)
Non trading purposes | Receiving leg | Fixed to floating | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (755)
Non trading purposes | Receiving leg | Fixed to floating | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (1,575)
Non trading purposes | Receiving leg | Floating to fixed | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (22,395)
Non trading purposes | Receiving leg | Floating to fixed | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (807)
Non trading purposes | Receiving leg | Floating to fixed | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (1,218)
Non trading purposes | Receiving leg | Floating to fixed | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (5,868)
Non trading purposes | Receiving leg | Floating to fixed | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (415)
Non trading purposes | Receiving leg | Floating to fixed | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (789)
Non trading purposes | Receiving leg | Floating to fixed | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (3,359)
Non trading purposes | Receiving leg | Floating to fixed | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Receiving leg | Floating to fixed | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Receiving leg | Floating to fixed | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (4,985)
Non trading purposes | Receiving leg | Floating to fixed | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Receiving leg | Floating to fixed | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (68)
Non trading purposes | Receiving leg | Floating to fixed | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (3,280)
Non trading purposes | Receiving leg | Floating to fixed | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Receiving leg | Floating to fixed | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (169)
Non trading purposes | Receiving leg | Floating to fixed | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (359)
Non trading purposes | Receiving leg | Floating to fixed | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (250)
Non trading purposes | Receiving leg | Floating to fixed | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (192)
Non trading purposes | Receiving leg | Floating to fixed | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (4,544)
Non trading purposes | Receiving leg | Floating to fixed | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (142)
Non trading purposes | Receiving leg | Floating to fixed | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Receiving leg | Floating to fixed | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (17,773)
Non trading purposes | Receiving leg | Floating to fixed | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (808)
Non trading purposes | Receiving leg | Floating to fixed | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading (1,219)
Non trading purposes | Paying leg | Fixed to fix | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 370
Average interest rate (as a percent) 0.00%
Non trading purposes | Paying leg | Fixed to fix | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 190
Average interest rate (as a percent) 0.51579%
Non trading purposes | Paying leg | Fixed to fix | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 5
Average interest rate (as a percent) 0.85%
Non trading purposes | Paying leg | Fixed to fix | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Non trading purposes | Paying leg | Fixed to fix | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 100
Average interest rate (as a percent) 1.175%
Non trading purposes | Paying leg | Fixed to fix | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 75
Average interest rate (as a percent) 0.55%
Non trading purposes | Paying leg | Fixed to fix | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 0
Average interest rate (as a percent) 0.00%
Non trading purposes | Paying leg | Fixed to fix | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 287
Average interest rate (as a percent) 0.00%
Non trading purposes | Paying leg | Fixed to floating | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading € 40,665
Non trading purposes | Paying leg | Fixed to floating | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 2,164
Non trading purposes | Paying leg | Fixed to floating | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 1,499
Non trading purposes | Paying leg | Fixed to floating | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 8,097
Non trading purposes | Paying leg | Fixed to floating | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 639
Non trading purposes | Paying leg | Fixed to floating | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 676
Non trading purposes | Paying leg | Fixed to floating | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 5,861
Non trading purposes | Paying leg | Fixed to floating | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 283
Non trading purposes | Paying leg | Fixed to floating | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 28
Non trading purposes | Paying leg | Fixed to floating | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 9,145
Non trading purposes | Paying leg | Fixed to floating | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 283
Non trading purposes | Paying leg | Fixed to floating | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 23
Non trading purposes | Paying leg | Fixed to floating | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 7,282
Non trading purposes | Paying leg | Fixed to floating | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 283
Non trading purposes | Paying leg | Fixed to floating | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 248
Non trading purposes | Paying leg | Fixed to floating | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 4,018
Non trading purposes | Paying leg | Fixed to floating | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 534
Non trading purposes | Paying leg | Fixed to floating | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 524
Non trading purposes | Paying leg | Fixed to floating | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 6,262
Non trading purposes | Paying leg | Fixed to floating | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 142
Non trading purposes | Paying leg | Fixed to floating | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Paying leg | Fixed to floating | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 21,658
Non trading purposes | Paying leg | Fixed to floating | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 749
Non trading purposes | Paying leg | Fixed to floating | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 1,499
Non trading purposes | Paying leg | Floating to fixed | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 22,395
Non trading purposes | Paying leg | Floating to fixed | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 807
Non trading purposes | Paying leg | Floating to fixed | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 1,218
Non trading purposes | Paying leg | Floating to fixed | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 5,868
Non trading purposes | Paying leg | Floating to fixed | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 415
Non trading purposes | Paying leg | Floating to fixed | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 789
Non trading purposes | Paying leg | Floating to fixed | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 3,359
Non trading purposes | Paying leg | Floating to fixed | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Paying leg | Floating to fixed | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Paying leg | Floating to fixed | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 4,985
Non trading purposes | Paying leg | Floating to fixed | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Paying leg | Floating to fixed | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 68
Non trading purposes | Paying leg | Floating to fixed | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 3,280
Non trading purposes | Paying leg | Floating to fixed | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Paying leg | Floating to fixed | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 169
Non trading purposes | Paying leg | Floating to fixed | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 359
Non trading purposes | Paying leg | Floating to fixed | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 250
Non trading purposes | Paying leg | Floating to fixed | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 192
Non trading purposes | Paying leg | Floating to fixed | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 4,544
Non trading purposes | Paying leg | Floating to fixed | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 142
Non trading purposes | Paying leg | Floating to fixed | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 0
Non trading purposes | Paying leg | Floating to fixed | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 18,644
Non trading purposes | Paying leg | Floating to fixed | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 811
Non trading purposes | Paying leg | Floating to fixed | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for trading 1,245
Derivative instruments | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 424
Derivative instruments | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (918)
Derivative instruments | Fair value | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (4)
Derivative instruments | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (216)
Derivative instruments | Fair value | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fair value | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fair value | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (17)
Derivative instruments | Fair value | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (7)
Derivative instruments | Fair value | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1)
Derivative instruments | Fixed to fix | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Fixed to fix | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging € 1
Derivative instruments | Fixed to floating | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 2.89729%
Average spread (as a percent) 0.02904%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.39864%
Average spread (as a percent) 0.10332%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 2
Derivative instruments | Fixed to floating | 2018 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.927%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.19496%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.4264%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.31678%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.2765%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2018 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 7.25%
Average spread (as a percent) 2.80%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.44508%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 5.75%
Average spread (as a percent) 1.12%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2019 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 7.25%
Average spread (as a percent) 2.80%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.01893%
Average spread (as a percent) 0.21854%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 7.89667%
Average spread (as a percent) 0.40533%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.86629%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 4.90%
Average spread (as a percent) 1.27%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.9525%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2020 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 7.25%
Average spread (as a percent) 2.80%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.2497%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.43519%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 4.90%
Average spread (as a percent) 1.27%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2021 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 7.25%
Average spread (as a percent) 2.80%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.83101%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.51145%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 4.90%
Average spread (as a percent) 1.27%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.745%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | 2022 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 7.25%
Average spread (as a percent) 2.80%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.24023%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.21218%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.42088%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 4.90%
Average spread (as a percent) 1.27%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Subsequent years | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Fair value | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (88)
Derivative instruments | Fixed to floating | Fair value | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (918)
Derivative instruments | Fixed to floating | Fair value | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 1
Derivative instruments | Fixed to floating | Fair value | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (216)
Derivative instruments | Fixed to floating | Fair value | JPY  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Fair value | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (3)
Derivative instruments | Fixed to floating | Fair value | CHF  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (17)
Derivative instruments | Fixed to floating | Fair value | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Fixed to floating | Fair value | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 1
Derivative instruments | Floating to fixed | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.70475%
Average spread (as a percent) 0.20413%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 1.84576%
Derivative financial assets held for hedging € (3)
Derivative instruments | Floating to fixed | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 1
Derivative instruments | Floating to fixed | 2018 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.70072%
Average spread (as a percent) 0.42899%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2018 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2018 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2018 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2018 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 5.05372%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2018 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 2.00099%
Derivative financial assets held for hedging € (2)
Derivative instruments | Floating to fixed | 2018 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 5.2518%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2019 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.06536%
Average spread (as a percent) 1.25351%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2019 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2019 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2019 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2019 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2019 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 1.54834%
Derivative financial assets held for hedging € (1)
Derivative instruments | Floating to fixed | 2019 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 2.56599%
Average spread (as a percent) 0.05388%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 6.66833%
Average spread (as a percent) 0.40533%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.31%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2020 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 5.2518%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.91555%
Average spread (as a percent) 0.02695%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 3.2605%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2021 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 5.27453%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.12299%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | 2022 | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 5.29361%
Derivative financial assets held for hedging € 3
Derivative instruments | Floating to fixed | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 1.21664%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Subsequent years | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Subsequent years | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Subsequent years | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Subsequent years | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Subsequent years | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 5.25174%
Derivative financial assets held for hedging € (3)
Derivative instruments | Floating to fixed | Fair value | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 511
Derivative instruments | Floating to fixed | Fair value | USD  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Fair value | MXN  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (5)
Derivative instruments | Floating to fixed | Fair value | GBP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Floating to fixed | Fair value | CLP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 3
Derivative instruments | Floating to fixed | Fair value | BRL  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (7)
Derivative instruments | Floating to fixed | Fair value | COP  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € (2)
Derivative instruments | Receiving leg | Fixed to fix | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € (20)
Derivative instruments | Receiving leg | Fixed to fix | 2018 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Receiving leg | Fixed to fix | 2019 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € (20)
Derivative instruments | Receiving leg | Fixed to fix | 2020 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Receiving leg | Fixed to fix | 2021 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Receiving leg | Fixed to fix | 2022 | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Receiving leg | Fixed to fix | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Receiving leg | Fixed to fix | Fair value | EUR  
Disclosure of financial assets [line items]  
Average interest rate (as a percent) 0.00%
Derivative financial assets held for hedging € (37)
Derivative instruments | Receiving leg | Fixed to floating | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,800)
Derivative instruments | Receiving leg | Fixed to floating | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (13,385)
Derivative instruments | Receiving leg | Fixed to floating | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (127)
Derivative instruments | Receiving leg | Fixed to floating | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (2,366)
Derivative instruments | Receiving leg | Fixed to floating | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (74)
Derivative instruments | Receiving leg | Fixed to floating | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (80)
Derivative instruments | Receiving leg | Fixed to floating | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (534)
Derivative instruments | Receiving leg | Fixed to floating | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (32)
Derivative instruments | Receiving leg | Fixed to floating | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (200)
Derivative instruments | Receiving leg | Fixed to floating | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,371)
Derivative instruments | Receiving leg | Fixed to floating | 2018 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (563)
Derivative instruments | Receiving leg | Fixed to floating | 2018 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (74)
Derivative instruments | Receiving leg | Fixed to floating | 2018 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2018 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (214)
Derivative instruments | Receiving leg | Fixed to floating | 2018 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2018 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (4)
Derivative instruments | Receiving leg | Fixed to floating | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,132)
Derivative instruments | Receiving leg | Fixed to floating | 2019 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2019 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2019 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (64)
Derivative instruments | Receiving leg | Fixed to floating | 2019 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2019 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2019 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (8)
Derivative instruments | Receiving leg | Fixed to floating | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,779)
Derivative instruments | Receiving leg | Fixed to floating | 2020 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (127)
Derivative instruments | Receiving leg | Fixed to floating | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (789)
Derivative instruments | Receiving leg | Fixed to floating | 2020 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2020 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (7)
Derivative instruments | Receiving leg | Fixed to floating | 2020 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (192)
Derivative instruments | Receiving leg | Fixed to floating | 2020 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2020 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (8)
Derivative instruments | Receiving leg | Fixed to floating | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (500)
Derivative instruments | Receiving leg | Fixed to floating | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,509)
Derivative instruments | Receiving leg | Fixed to floating | 2021 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2021 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2021 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (3)
Derivative instruments | Receiving leg | Fixed to floating | 2021 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2021 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2021 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (8)
Derivative instruments | Receiving leg | Fixed to floating | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,235)
Derivative instruments | Receiving leg | Fixed to floating | 2022 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (563)
Derivative instruments | Receiving leg | Fixed to floating | 2022 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2022 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (3)
Derivative instruments | Receiving leg | Fixed to floating | 2022 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (128)
Derivative instruments | Receiving leg | Fixed to floating | 2022 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | 2022 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (4)
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,100)
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (6,359)
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (451)
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (3)
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | Subsequent years | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,881)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (13,993)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (129)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (2,578)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (74)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (86)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (549)
Derivative instruments | Receiving leg | Fixed to floating | Fair value | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Fixed to floating | Fair value | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (36)
Derivative instruments | Receiving leg | Floating to fixed | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (14,198)
Derivative instruments | Receiving leg | Floating to fixed | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (127)
Derivative instruments | Receiving leg | Floating to fixed | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (248)
Derivative instruments | Receiving leg | Floating to fixed | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (110)
Derivative instruments | Receiving leg | Floating to fixed | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (167)
Derivative instruments | Receiving leg | Floating to fixed | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (2,166)
Derivative instruments | Receiving leg | Floating to fixed | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2018 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2018 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (87)
Derivative instruments | Receiving leg | Floating to fixed | 2018 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (72)
Derivative instruments | Receiving leg | Floating to fixed | 2018 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (70)
Derivative instruments | Receiving leg | Floating to fixed | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,371)
Derivative instruments | Receiving leg | Floating to fixed | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2019 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2019 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2019 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (38)
Derivative instruments | Receiving leg | Floating to fixed | 2019 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (4,097)
Derivative instruments | Receiving leg | Floating to fixed | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2020 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (127)
Derivative instruments | Receiving leg | Floating to fixed | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2020 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (27)
Derivative instruments | Receiving leg | Floating to fixed | 2020 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2020 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (10)
Derivative instruments | Receiving leg | Floating to fixed | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (1,102)
Derivative instruments | Receiving leg | Floating to fixed | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2021 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2021 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (134)
Derivative instruments | Receiving leg | Floating to fixed | 2021 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2021 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (21)
Derivative instruments | Receiving leg | Floating to fixed | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (192)
Derivative instruments | Receiving leg | Floating to fixed | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2022 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2022 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2022 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | 2022 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (31)
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (5,270)
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Subsequent years | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (35)
Derivative instruments | Receiving leg | Floating to fixed | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (10,610)
Derivative instruments | Receiving leg | Floating to fixed | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Fair value | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (129)
Derivative instruments | Receiving leg | Floating to fixed | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Receiving leg | Floating to fixed | Fair value | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (247)
Derivative instruments | Receiving leg | Floating to fixed | Fair value | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging (110)
Derivative instruments | Receiving leg | Floating to fixed | Fair value | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging € (29)
Derivative instruments | Paying leg | Fixed to fix | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 20
Derivative instruments | Paying leg | Fixed to fix | 2018 | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Paying leg | Fixed to fix | 2019 | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.85%
Derivative financial assets held for hedging € 20
Derivative instruments | Paying leg | Fixed to fix | 2020 | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Paying leg | Fixed to fix | 2021 | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Paying leg | Fixed to fix | 2022 | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Paying leg | Fixed to fix | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 0
Derivative instruments | Paying leg | Fixed to fix | Fair value | EUR  
Disclosure of financial assets [line items]  
Average spread (as a percent) 0.00%
Derivative financial assets held for hedging € 38
Derivative instruments | Paying leg | Fixed to floating | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,800
Derivative instruments | Paying leg | Fixed to floating | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 13,385
Derivative instruments | Paying leg | Fixed to floating | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 127
Derivative instruments | Paying leg | Fixed to floating | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 2,366
Derivative instruments | Paying leg | Fixed to floating | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 74
Derivative instruments | Paying leg | Fixed to floating | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 80
Derivative instruments | Paying leg | Fixed to floating | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 534
Derivative instruments | Paying leg | Fixed to floating | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 34
Derivative instruments | Paying leg | Fixed to floating | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 200
Derivative instruments | Paying leg | Fixed to floating | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,371
Derivative instruments | Paying leg | Fixed to floating | 2018 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 563
Derivative instruments | Paying leg | Fixed to floating | 2018 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 74
Derivative instruments | Paying leg | Fixed to floating | 2018 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2018 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 214
Derivative instruments | Paying leg | Fixed to floating | 2018 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2018 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 4
Derivative instruments | Paying leg | Fixed to floating | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,132
Derivative instruments | Paying leg | Fixed to floating | 2019 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2019 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2019 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 64
Derivative instruments | Paying leg | Fixed to floating | 2019 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2019 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2019 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 8
Derivative instruments | Paying leg | Fixed to floating | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,779
Derivative instruments | Paying leg | Fixed to floating | 2020 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 127
Derivative instruments | Paying leg | Fixed to floating | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 789
Derivative instruments | Paying leg | Fixed to floating | 2020 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2020 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 7
Derivative instruments | Paying leg | Fixed to floating | 2020 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 192
Derivative instruments | Paying leg | Fixed to floating | 2020 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2020 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 8
Derivative instruments | Paying leg | Fixed to floating | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 500
Derivative instruments | Paying leg | Fixed to floating | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,509
Derivative instruments | Paying leg | Fixed to floating | 2021 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2021 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2021 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 3
Derivative instruments | Paying leg | Fixed to floating | 2021 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2021 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2021 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 8
Derivative instruments | Paying leg | Fixed to floating | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,235
Derivative instruments | Paying leg | Fixed to floating | 2022 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 563
Derivative instruments | Paying leg | Fixed to floating | 2022 | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2022 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 3
Derivative instruments | Paying leg | Fixed to floating | 2022 | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 128
Derivative instruments | Paying leg | Fixed to floating | 2022 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | 2022 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 4
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,100
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 6,359
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 451
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 3
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | Subsequent years | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,793
Derivative instruments | Paying leg | Fixed to floating | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 13,075
Derivative instruments | Paying leg | Fixed to floating | Fair value | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 130
Derivative instruments | Paying leg | Fixed to floating | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 2,362
Derivative instruments | Paying leg | Fixed to floating | Fair value | JPY  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 74
Derivative instruments | Paying leg | Fixed to floating | Fair value | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 83
Derivative instruments | Paying leg | Fixed to floating | Fair value | CHF  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 532
Derivative instruments | Paying leg | Fixed to floating | Fair value | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Fixed to floating | Fair value | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 37
Derivative instruments | Paying leg | Floating to fixed | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 14,198
Derivative instruments | Paying leg | Floating to fixed | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 127
Derivative instruments | Paying leg | Floating to fixed | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 248
Derivative instruments | Paying leg | Floating to fixed | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 107
Derivative instruments | Paying leg | Floating to fixed | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 168
Derivative instruments | Paying leg | Floating to fixed | 2018 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 2,166
Derivative instruments | Paying leg | Floating to fixed | 2018 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2018 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2018 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2018 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 87
Derivative instruments | Paying leg | Floating to fixed | 2018 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 70
Derivative instruments | Paying leg | Floating to fixed | 2018 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 70
Derivative instruments | Paying leg | Floating to fixed | 2019 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,371
Derivative instruments | Paying leg | Floating to fixed | 2019 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2019 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2019 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2019 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2019 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 37
Derivative instruments | Paying leg | Floating to fixed | 2019 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2020 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 4,097
Derivative instruments | Paying leg | Floating to fixed | 2020 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2020 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 127
Derivative instruments | Paying leg | Floating to fixed | 2020 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2020 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 27
Derivative instruments | Paying leg | Floating to fixed | 2020 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2020 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 10
Derivative instruments | Paying leg | Floating to fixed | 2021 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 1,102
Derivative instruments | Paying leg | Floating to fixed | 2021 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2021 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2021 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2021 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 134
Derivative instruments | Paying leg | Floating to fixed | 2021 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2021 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 21
Derivative instruments | Paying leg | Floating to fixed | 2022 | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 192
Derivative instruments | Paying leg | Floating to fixed | 2022 | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2022 | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2022 | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2022 | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2022 | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | 2022 | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 34
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 5,270
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Subsequent years | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 32
Derivative instruments | Paying leg | Floating to fixed | Fair value | EUR  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 11,121
Derivative instruments | Paying leg | Floating to fixed | Fair value | USD  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Fair value | MXN  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 124
Derivative instruments | Paying leg | Floating to fixed | Fair value | GBP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 0
Derivative instruments | Paying leg | Floating to fixed | Fair value | CLP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 250
Derivative instruments | Paying leg | Floating to fixed | Fair value | BRL  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging 103
Derivative instruments | Paying leg | Floating to fixed | Fair value | COP  
Disclosure of financial assets [line items]  
Derivative financial assets held for hedging € 27