v3.26.1
Equity - Schedule of changes in treasury shares (Details) - EUR (€)
shares in Thousands, € in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disclosure of equity [Line Items]    
Opening balance € (2,404) € (765)
Purchased/sold for trading purposes 3 6
Purchased under staff share plans (71) (64)
Distributed under staff share plans 72 60
Purchased under Share buyback programme (1,053) (3,641)
Cancelled under Share buyback programme 2,000 2,000
Closing balance € (1,454) € (2,404)
Treasury shares    
Disclosure of equity [Line Items]    
Beginning balance, ordinary shares (in shares) 119,105 51,117
Purchased/sold for trading purposes (in shares) (109) (480)
Purchased under staff share and stock option plans (in shares) 2,968 3,674
Distributed under staff share and stock option plans (in shares) (3,071) (3,460)
Purchased under Share buyback programme (in shares) 42,963 194,102
Cancelled under Share buyback programme (in shares) (101,193) (125,848)
Ending balance, ordinary shares (in shares) 60,664 119,105