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Employee benefit plans
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Employee benefit plans Employee benefit plans
The components of net periodic benefit (credit) cost are presented below. The service cost component is reflected in staff expense, whereas the remaining components are reflected in other expense.

Net periodic benefit (credit) cost
Quarter ended
Sept. 30, 2025June 30, 2025Sept. 30, 2024
(in millions)Domestic pension benefitsForeign pension benefitsHealth care benefitsDomestic pension benefitsForeign pension benefitsHealth care benefitsDomestic pension benefitsForeign pension benefitsHealth care benefits
Service cost$— $6 $— $— $— $— $— $3 $— 
Interest cost46 10 1 46 11 1 46 10 2 
Expected return on assets(90)(19)(2)(91)(20)(2)(96)(21)(3)
Other8 (1)1 8 (1)1 6 (1)(2)
Net periodic benefit (credit)$(36)$(4)$— $(37)$(10)$— $(44)$(9)$(3)
Net periodic benefit (credit) costYear-to-date
Sept. 30, 2025Sept. 30, 2024
(in millions)Domestic pension benefitsForeign pension benefitsHealth care benefitsDomestic pension benefitsForeign pension benefitsHealth care benefits
Service cost$— $9 $— $— $9 $— 
Interest cost138 31 3 137 29 4 
Expected return on assets(272)(58)(6)(286)(60)(7)
Other24 (3)3 18 (3)(6)
Net periodic benefit (credit)$(110)$(21)$— $(131)$(25)$(9)