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Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2021
Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Components of Net Benefit Costs
Net periodic pension cost consisted of the following:
 U.S. PlansNon-U.S. Plans
 For the Three Months Ended
March 31,
For the Three Months Ended
March 31,
 2021202020212020
 (in millions)
Service cost$$$35 $30 
Interest cost10 13 29 37 
Expected return on plan assets(18)(19)(106)(99)
Amortization:
Net loss from experience differences33 29 
Prior service cost/(benefit)— — (2)(2)
Settlement losses and other expenses— 
Net periodic pension cost$$$(11)$(3)
Postretirement Benefit Plans  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Components of Net Benefit Costs
Net periodic postretirement health care benefit consisted of the following:
 For the Three Months Ended
March 31,
 20212020
 (in millions)
Service cost$$
Interest cost
Amortization:
Net loss from experience differences
Prior service credit— (8)
Net periodic postretirement health care benefit$$(1)
Postemployment Benefit Plans  
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Components of Net Benefit Costs
Net periodic postemployment cost consisted of the following:
 For the Three Months Ended
March 31,
 20212020
 (in millions)
Service cost$$
Interest cost
Amortization of net gains(1)(1)
Net periodic postemployment cost$$