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Postretirement benefits
6 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Compensation and Employee Benefit Plans [Text Block] Postretirement benefits
The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:
Pension Benefit PlansOther Postretirement
Benefit Plans
2022202120222021
Three Months Ended June 30U.S. PlansNon-U.S. PlansU.S. PlansNon-U.S. Plans
(in millions of U.S. dollars)
Service cost$ $1 $— $$ $— 
Non-service cost (benefit):
Interest cost22 6 17 1 — 
Expected return on plan assets(71)(11)(63)(11)(1)— 
Amortization of net actuarial loss  —  — 
Amortization of prior service cost  — —  (6)
Settlements  — —  — 
Total non-service cost (benefit)(49)(5)(46)(6) (6)
Net periodic benefit cost (benefit)$(49)$(4)$(46)$(5)$ $(6)

Pension Benefit PlansOther Postretirement
Benefit Plans
2022202120222021
Six Months Ended June 30U.S. PlansNon-U.S. PlansU.S. PlansNon-U.S. Plans
(in millions of U.S. dollars)
Service cost$ $2 $— $$ $— 
Non-service cost (benefit):
Interest cost43 12 35 1 — 
Expected return on plan assets(142)(22)(127)(22)(1)— 
Amortization of net actuarial loss  —  — 
Amortization of prior service cost  — —  (26)
Settlements  — —  — 
Total non-service cost (benefit)(99)(10)(92)(11) (26)
Net periodic benefit cost (benefit)$(99)$(8)$(92)$(9)$ $(26)
The line items in which the service cost and non-service cost (benefit) components of net periodic benefit cost (benefit) are included in the Consolidated statements of operations were as follows:
Pension Benefit PlansOther Postretirement
Benefit Plans
Three Months Ended June 302022202120222021
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses$ $— $ $— 
Administrative expenses1  — 
Total service cost1  — 
Non-service cost (benefit):
Losses and loss expenses(5)(4) (1)
Administrative expenses(49)(48) (5)
Total non-service cost (benefit)(54)(52) (6)
Net periodic benefit cost (benefit)$(53)$(51)$ $(6)

Pension Benefit PlansOther Postretirement
Benefit Plans
Six Months Ended June 302022202120222021
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses$ $— $ $— 
Administrative expenses2  — 
Total service cost2  — 
Non-service cost (benefit):
Losses and loss expenses(10)(9) (3)
Administrative expenses(99)(94) (23)
Total non-service cost (benefit)(109)(103) (26)
Net periodic benefit cost (benefit)$(107)$(101)$ $(26)