v3.26.1
Provisions - Schedule of changes in provision (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of other provisions [line items]      
Balances at beginning of year € 8,407 € 8,441 € 8,149
Incorporation of Group companies, net (13) 0 (4)
Additions charged to income 2,434 3,212 2,193
Interest expense (note 39) 91 105 93
Staff costs (note 46) 41 45 42
Provisions or reversion of provisions 2,302 3,062 2,058
Addition 5,057 4,796 3,992
Release (2,755) (1,734) (1,934)
Other additions arising from insurance contracts linked to pensions (5) (2) 0
Changes in value recognised in equity 220 643 944
Payments to pensioners and pre-retirees with a charge to internal provisions (465) (484) (498)
Benefits paid due to settlements (31)    
Insurance premiums paid 0 0 0
Payments to external funds (329) (708) (750)
Amounts used (1,914) (2,178) (1,826)
Transfer, exchange differences and other changes 51 (517) 233
Balances at end of year 8,355 8,407 8,441
Post employment plans      
Disclosure of other provisions [line items]      
Balances at beginning of year 1,731 2,225 2,392
Incorporation of Group companies, net (13) 0 (4)
Additions charged to income 75 94 92
Interest expense (note 39) 59 76 59
Staff costs (note 46) 32 34 33
Provisions or reversion of provisions (16) (16) 0
Addition 6 5 3
Release (22) (21) (3)
Other additions arising from insurance contracts linked to pensions (5) (2) 0
Changes in value recognised in equity 220 643 944
Payments to pensioners and pre-retirees with a charge to internal provisions (107) (153) (182)
Benefits paid due to settlements (31)    
Insurance premiums paid 0 0 0
Payments to external funds (329) (708) (750)
Amounts used 0 0 0
Transfer, exchange differences and other changes 115 (368) (267)
Balances at end of year 1,656 1,731 2,225
Long term employee benefits      
Disclosure of other provisions [line items]      
Balances at beginning of year 915 880 950
Incorporation of Group companies, net 0 0 0
Additions charged to income 437 368 244
Interest expense (note 39) 32 29 34
Staff costs (note 46) 9 11 9
Provisions or reversion of provisions 396 328 201
Addition 424 335 204
Release (28) (7) (3)
Other additions arising from insurance contracts linked to pensions 0 0 0
Changes in value recognised in equity 0 0 0
Payments to pensioners and pre-retirees with a charge to internal provisions (358) (331) (316)
Benefits paid due to settlements 0    
Insurance premiums paid 0 0 0
Payments to external funds 0 0 0
Amounts used 0 0 0
Transfer, exchange differences and other changes (1) (2) 2
Balances at end of year 993 915 880
Contingent liabilities and commitments      
Disclosure of other provisions [line items]      
Balances at beginning of year 710 702 734
Incorporation of Group companies, net 0 0 0
Additions charged to income 50 47 (38)
Interest expense (note 39) 0 0 0
Staff costs (note 46) 0 0 0
Provisions or reversion of provisions 50 47 (38)
Addition 591 430 378
Release (541) (383) (416)
Other additions arising from insurance contracts linked to pensions 0 0 0
Changes in value recognised in equity 0 0 0
Payments to pensioners and pre-retirees with a charge to internal provisions 0 0 0
Benefits paid due to settlements 0    
Insurance premiums paid 0 0 0
Payments to external funds 0 0 0
Amounts used 0 0 (1)
Transfer, exchange differences and other changes (47) (39) 7
Balances at end of year 713 710 702
Other provisions      
Disclosure of other provisions [line items]      
Balances at beginning of year 5,051 4,634 4,073
Incorporation of Group companies, net 0 0 0
Additions charged to income 1,872 2,703 1,895
Interest expense (note 39) 0 0 0
Staff costs (note 46) 0 0 0
Provisions or reversion of provisions 1,872 2,703 1,895
Addition 4,036 4,026 3,407
Release (2,164) (1,323) (1,512)
Other additions arising from insurance contracts linked to pensions 0 0 0
Changes in value recognised in equity 0 0 0
Payments to pensioners and pre-retirees with a charge to internal provisions 0 0 0
Benefits paid due to settlements 0    
Insurance premiums paid 0 0 0
Payments to external funds 0 0 0
Amounts used (1,914) (2,178) (1,825)
Transfer, exchange differences and other changes (16) (108) 491
Balances at end of year € 4,993 € 5,051 € 4,634