v3.25.4
Employee Benefits - Reconciliation in Movement of Liabilities and Assets - Impact on Balance Sheet (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
thereof:    
Funded status, end of year € 1,124 € 1,095
Net asset (liability) recognized 979 [1] 984 [2]
Change in the present value of the defined benefit obligation:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in the present value of the defined benefit obligation: Balance, beginning of year 15,011 15,681
Defined benefit cost recognized in Profit & Loss    
Current service cost 158 171
Interest cost 578 570
Past service cost and gain or loss arising from settlements 28 15
Defined benefit cost recognized in Other Comprehensive Income    
Actuarial gain or loss arising from changes in financial assumptions (601) (947)
Actuarial gain or loss arising from changes in demographic assumptions (45) 13
Actuarial gain or loss arising from experience 137 69
Cash flow and other changes    
Contributions by plan participants (17) (17)
Benefits paid 825 799
Payments in respect to settlements 6 0
Acquisitions/Divestitures (6) 0
Exchange rate changes (331) 219
Other 0 (2)
Change in the present value of the defined benefit obligation: Balance, end of year 14,115 15,011
thereof:    
Unfunded 192 217
Funded 13,923 14,794
Change in fair value of plan assets:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in fair value of plan assets: Balance, beginning of year 16,106 16,518
Defined benefit cost recognized in Profit & Loss    
Interest income 630 611
Defined benefit cost recognized in Other Comprehensive Income    
Return from plan assets less interest income (452) (589)
Cash flow and other changes    
Contributions by plan participants 17 17
Contributions by the employer 109 77
Benefits paid (804) [3] (776) [4]
Payments in respect to settlements 0 0
Acquisitions/Divestitures 6 0
Exchange rate changes 355 (256)
Other 0 1
Plan administration costs (6) (9)
thereof:    
Change in fair value of plan assets: Balance, end of year 15,239 16,106
Change in irrecoverable surplus (asset ceiling)    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in irrecoverable surplus (asset ceiling): Balance, beginning of year (111) (102)
Defined benefit cost recognized in Profit & Loss    
Interest cost 1 1
Defined benefit cost recognized in Other Comprehensive Income    
Changes in irrecoverable surplus (32) (9)
Cash flow and other changes    
Exchange rate changes 1 (1)
thereof:    
Change in irrecoverable surplus (asset ceiling): Balance, end of year (145) (111)
Fair value of reimbursement rights 3 3
Germany    
thereof:    
Funded status, end of year 283 273
Net asset (liability) recognized 283 273
Germany | Change in the present value of the defined benefit obligation:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in the present value of the defined benefit obligation: Balance, beginning of year 9,964 10,504
Defined benefit cost recognized in Profit & Loss    
Current service cost 106 119
Interest cost 343 343
Past service cost and gain or loss arising from settlements 14 14
Defined benefit cost recognized in Other Comprehensive Income    
Actuarial gain or loss arising from changes in financial assumptions (517) (549)
Actuarial gain or loss arising from changes in demographic assumptions (56) 0
Actuarial gain or loss arising from experience 54 71
Cash flow and other changes    
Contributions by plan participants (1) (1)
Benefits paid 554 539
Payments in respect to settlements 0 0
Acquisitions/Divestitures (6) 0
Exchange rate changes 0 0
Other 0 0
Change in the present value of the defined benefit obligation: Balance, end of year 9,349 9,964
thereof:    
Unfunded 0 0
Funded 9,349 9,964
Germany | Change in fair value of plan assets:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in fair value of plan assets: Balance, beginning of year 10,237 10,532
Defined benefit cost recognized in Profit & Loss    
Interest income 354 350
Defined benefit cost recognized in Other Comprehensive Income    
Return from plan assets less interest income (443) (148)
Cash flow and other changes    
Contributions by plan participants 1 1
Contributions by the employer 43 41
Benefits paid (554) [3] (539) [4]
Payments in respect to settlements 0 0
Acquisitions/Divestitures 6 0
Exchange rate changes 0 0
Other 0 0
Plan administration costs 0 0
thereof:    
Change in fair value of plan assets: Balance, end of year 9,632 10,237
Germany | Change in irrecoverable surplus (asset ceiling)    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in irrecoverable surplus (asset ceiling): Balance, beginning of year 0 0
Defined benefit cost recognized in Profit & Loss    
Interest cost 0 0
Defined benefit cost recognized in Other Comprehensive Income    
Changes in irrecoverable surplus 0 0
Cash flow and other changes    
Exchange rate changes 0 0
thereof:    
Change in irrecoverable surplus (asset ceiling): Balance, end of year 0 0
Fair value of reimbursement rights 0 0
U.K.    
thereof:    
Funded status, end of year 827 875
Net asset (liability) recognized 827 875
U.K. | Change in the present value of the defined benefit obligation:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in the present value of the defined benefit obligation: Balance, beginning of year 2,803 3,026
Defined benefit cost recognized in Profit & Loss    
Current service cost 7 8
Interest cost 145 137
Past service cost and gain or loss arising from settlements 2 1
Defined benefit cost recognized in Other Comprehensive Income    
Actuarial gain or loss arising from changes in financial assumptions (87) (398)
Actuarial gain or loss arising from changes in demographic assumptions 1 10
Actuarial gain or loss arising from experience 64 (12)
Cash flow and other changes    
Contributions by plan participants 0 0
Benefits paid 109 113
Payments in respect to settlements 0 0
Acquisitions/Divestitures 0 0
Exchange rate changes (148) 142
Other 0 (2)
Change in the present value of the defined benefit obligation: Balance, end of year 2,678 2,803
thereof:    
Unfunded 8 10
Funded 2,670 2,793
U.K. | Change in fair value of plan assets:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in fair value of plan assets: Balance, beginning of year 3,678 3,912
Defined benefit cost recognized in Profit & Loss    
Interest income 191 177
Defined benefit cost recognized in Other Comprehensive Income    
Return from plan assets less interest income (58) (479)
Cash flow and other changes    
Contributions by plan participants 0 0
Contributions by the employer 0 0
Benefits paid (109) [3] (112) [4]
Payments in respect to settlements 0 0
Acquisitions/Divestitures 0 0
Exchange rate changes 194 (185)
Other 0 0
Plan administration costs (3) (5)
thereof:    
Change in fair value of plan assets: Balance, end of year 3,505 3,678
U.K. | Change in irrecoverable surplus (asset ceiling)    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in irrecoverable surplus (asset ceiling): Balance, beginning of year 0 0
Defined benefit cost recognized in Profit & Loss    
Interest cost 0 0
Defined benefit cost recognized in Other Comprehensive Income    
Changes in irrecoverable surplus 0 0
Cash flow and other changes    
Exchange rate changes 0 0
thereof:    
Change in irrecoverable surplus (asset ceiling): Balance, end of year 0 0
Fair value of reimbursement rights 0 0
U.S.    
thereof:    
Funded status, end of year (145) (166)
Net asset (liability) recognized (145) (166)
U.S. | Change in the present value of the defined benefit obligation:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in the present value of the defined benefit obligation: Balance, beginning of year 1,216 1,172
Defined benefit cost recognized in Profit & Loss    
Current service cost 6 7
Interest cost 59 58
Past service cost and gain or loss arising from settlements 0 0
Defined benefit cost recognized in Other Comprehensive Income    
Actuarial gain or loss arising from changes in financial assumptions 28 (13)
Actuarial gain or loss arising from changes in demographic assumptions 9 0
Actuarial gain or loss arising from experience 5 (1)
Cash flow and other changes    
Contributions by plan participants 0 0
Benefits paid 89 85
Payments in respect to settlements 0 0
Acquisitions/Divestitures 0 0
Exchange rate changes (145) 78
Other 0 0
Change in the present value of the defined benefit obligation: Balance, end of year 1,089 1,216
thereof:    
Unfunded 122 139
Funded 967 1,077
U.S. | Change in fair value of plan assets:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in fair value of plan assets: Balance, beginning of year 1,050 1,003
Defined benefit cost recognized in Profit & Loss    
Interest income 51 50
Defined benefit cost recognized in Other Comprehensive Income    
Return from plan assets less interest income 28 4
Cash flow and other changes    
Contributions by plan participants 0 0
Contributions by the employer 19 0
Benefits paid (76) [3] (71) [4]
Payments in respect to settlements 0 0
Acquisitions/Divestitures 0 0
Exchange rate changes 126 (67)
Other 0 0
Plan administration costs (2) (3)
thereof:    
Change in fair value of plan assets: Balance, end of year 944 1,050
U.S. | Change in irrecoverable surplus (asset ceiling)    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in irrecoverable surplus (asset ceiling): Balance, beginning of year 0 0
Defined benefit cost recognized in Profit & Loss    
Interest cost 0 0
Defined benefit cost recognized in Other Comprehensive Income    
Changes in irrecoverable surplus 0 0
Cash flow and other changes    
Exchange rate changes 0 0
thereof:    
Change in irrecoverable surplus (asset ceiling): Balance, end of year 0 0
Fair value of reimbursement rights 0 0
Other    
thereof:    
Funded status, end of year 159 113
Net asset (liability) recognized 14 2
Other | Change in the present value of the defined benefit obligation:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in the present value of the defined benefit obligation: Balance, beginning of year 1,028 979
Defined benefit cost recognized in Profit & Loss    
Current service cost 39 37
Interest cost 31 32
Past service cost and gain or loss arising from settlements 12 0
Defined benefit cost recognized in Other Comprehensive Income    
Actuarial gain or loss arising from changes in financial assumptions (25) 13
Actuarial gain or loss arising from changes in demographic assumptions 1 3
Actuarial gain or loss arising from experience 14 11
Cash flow and other changes    
Contributions by plan participants (16) (16)
Benefits paid 73 62
Payments in respect to settlements 6 0
Acquisitions/Divestitures 0 0
Exchange rate changes (38) (1)
Other 0 0
Change in the present value of the defined benefit obligation: Balance, end of year 999 1,028
thereof:    
Unfunded 62 68
Funded 937 960
Other | Change in fair value of plan assets:    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in fair value of plan assets: Balance, beginning of year 1,141 1,071
Defined benefit cost recognized in Profit & Loss    
Interest income 34 34
Defined benefit cost recognized in Other Comprehensive Income    
Return from plan assets less interest income 21 34
Cash flow and other changes    
Contributions by plan participants 16 16
Contributions by the employer 47 36
Benefits paid (65) [3] (54) [4]
Payments in respect to settlements 0 0
Acquisitions/Divestitures 0 0
Exchange rate changes 35 (4)
Other 0 1
Plan administration costs (1) (1)
thereof:    
Change in fair value of plan assets: Balance, end of year 1,158 1,141
Other | Change in irrecoverable surplus (asset ceiling)    
Reconciliation in Movement of Liabilities and Assets, Impact on Balance Sheet [line items]    
Change in irrecoverable surplus (asset ceiling): Balance, beginning of year (111) (102)
Defined benefit cost recognized in Profit & Loss    
Interest cost 1 1
Defined benefit cost recognized in Other Comprehensive Income    
Changes in irrecoverable surplus (32) (9)
Cash flow and other changes    
Exchange rate changes 1 (1)
thereof:    
Change in irrecoverable surplus (asset ceiling): Balance, end of year (145) (111)
Fair value of reimbursement rights € 3 € 3
[1] Thereof € 1.2 billion recognized in Other assets and € 261 millionin Other liabilities
[2] Thereof € 1.3 billion recognized in Other assets and € 317 million in Other liabilities
[3] For funded plans only
[4] For funded plans only