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Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2021
Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Components of Net Benefit Costs/(Credits)
Net periodic pension cost/(benefit) consisted of the following:
 U.S. PlansNon-U.S. Plans
 For the Three Months Ended
September 30,
For the Three Months Ended
September 30,
 2021202020212020
 (in millions)
Service cost$$$29 $30 
Interest cost10 12 39 37 
Expected return on plan assets(18)(19)(106)(100)
Amortization:
Net loss from experience differences32 29 
Prior service cost/(benefit)— (2)(2)
Curtailment credit (1)
— — (3)— 
Settlement losses and other expenses— — 
Net periodic pension cost/(benefit)$$$(11)$(6)
 U.S. PlansNon-U.S. Plans
 For the Nine Months Ended
September 30,
For the Nine Months Ended
September 30,
 2021202020212020
 (in millions)
Service cost$$$99 $89 
Interest cost30 38 98 110 
Expected return on plan assets(54)(58)(319)(295)
Amortization:
Net loss from experience differences13 13 98 86 
Prior service cost/(benefit)— (5)(5)
Curtailment credit (1)
— — (17)— 
Settlement losses and other expenses14 15 — 
Net periodic pension cost/(benefit)$$13 $(46)$(13)
(1)During the third quarter of 2021, we terminated our Defined Benefit Pension Scheme in Nigeria. During the second quarter of 2021, we made a decision to freeze our Defined Benefit Pension Scheme in the United Kingdom. As a result, we recognized curtailment credits of $(3 million) for the three months and $(17 million) for the nine months ended September 30, 2021 recorded within benefit plan non-service income. In connection with the United Kingdom plan freeze, we also incurred incentive payment charges and other expenses of $2 million for the three months and $47 million for the nine months ended September 30, 2021 included in operating income.
Postretirement Benefit Plans  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Components of Net Benefit Costs/(Credits)
Net periodic postretirement health care cost/(benefit) consisted of the following:
 For the Three Months Ended
September 30,
For the Nine Months Ended
September 30,
 2021202020212020
 (in millions)
Service cost$$$$
Interest cost
Amortization:
Net loss from experience differences
Prior service credit— (8)— (23)
Net periodic postretirement health care cost/(benefit)$$(3)$11 $(5)
Postemployment Benefit Plans  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Components of Net Benefit Costs/(Credits)
Net periodic postemployment cost consisted of the following:
 For the Three Months Ended
September 30,
For the Nine Months Ended
September 30,
 2021202020212020
 (in millions)
Service cost$$$$
Interest cost
Amortization of net gains(2)(1)(3)(3)
Net periodic postemployment cost$$$$