v3.26.1
Intangible assets - Other intangible assets - Disclosure of detailed information about intangible assets (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance € 5,821 € 5,854 € 4,904
Net  additions and disposals 1,714 2,104 2,197
Change in scope of consolidation (8) (2) 181
Amortization and impairment (1,955) (1,853) (1,439)
Application of amortization and impairment 0 0 0
Exchange differences and other (222) (282) 11
Intangible assets, end balance € 5,350 € 5,821 € 5,854
IT developments | Minimum      
Disclosure of detailed information about intangible assets [line items]      
Useful life measured as period of time, intangible assets other than goodwill 3 years 3 years 3 years
IT developments | Maximum      
Disclosure of detailed information about intangible assets [line items]      
Useful life measured as period of time, intangible assets other than goodwill 10 years 10 years 10 years
Gross carrying amount      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance € 15,261 € 14,773 € 12,502
Net  additions and disposals 1,714 2,104 2,197
Change in scope of consolidation (20) (8) 176
Application of amortization and impairment (1,286) (1,169) (230)
Exchange differences and other (1,179) (439) 128
Intangible assets, end balance 14,490 15,261 14,773
Gross carrying amount | Brand names      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance 32 40 33
Net  additions and disposals 0 0 0
Change in scope of consolidation 0 0 8
Application of amortization and impairment 0 0 (2)
Exchange differences and other 0 (8) 1
Intangible assets, end balance 32 32 40
Gross carrying amount | IT developments      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance 13,322 12,867 10,721
Net  additions and disposals 1,713 2,104 2,197
Change in scope of consolidation (7) (8) 18
Application of amortization and impairment (1,286) (1,169) (196)
Exchange differences and other (1,084) (472) 127
Intangible assets, end balance 12,658 13,322 12,867
Gross carrying amount | Other      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance 1,907 1,866 1,748
Net  additions and disposals 1 0 0
Change in scope of consolidation (13) 0 150
Application of amortization and impairment 0 0 (32)
Exchange differences and other (95) 41 0
Intangible assets, end balance 1,800 1,907 1,866
Accumulated depreciation      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance (9,235) (8,851) (7,554)
Net  additions and disposals 0 0 0
Change in scope of consolidation 12 6 5
Amortization and impairment (1,847) (1,626) (1,386)
Application of amortization and impairment 1,228 1,062 209
Exchange differences and other 795 174 (125)
Intangible assets, end balance (9,047) (9,235) (8,851)
Accumulated depreciation | IT developments      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance (8,312) (8,078) (6,866)
Net  additions and disposals 0 0 0
Change in scope of consolidation 6 6 0
Amortization and impairment (1,715) (1,546) (1,294)
Application of amortization and impairment 1,228 1,062 177
Exchange differences and other 723 244 (95)
Intangible assets, end balance (8,070) (8,312) (8,078)
Accumulated depreciation | Other      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance (923) (773) (688)
Net  additions and disposals 0 0 0
Change in scope of consolidation 6 0 5
Amortization and impairment (132) (80) (92)
Application of amortization and impairment 0 0 32
Exchange differences and other 72 (70) (30)
Intangible assets, end balance (977) (923) (773)
Accumulated impairment      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets, beginning balance (205) (68) (44)
Net  additions and disposals 0 0 0
Change in scope of consolidation 0 0 0
Amortization and impairment (108) (227) (53)
Of which addition (108) (227) (53)
Of which Liberation 0 0
Application of amortization and impairment 58 107 21
Exchange differences and other 162 (17) 8
Intangible assets, end balance € (93) € (205) € (68)