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Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit (Income) Cost
Net periodic benefit (income) cost consisted of the following:
PensionPostretirement
For the Three Months Ended March 31,
 (in millions)2022202120222021
Service cost$15 $17 $5 $
Interest cost52 46 10 11 
Expected return on plan assets
(123)(131)(3)(4)
Amortization:
Net loss24 33 4 
Prior service cost (credit)
2 (12)(6)
Net periodic benefit (income) cost$(30)$(34)$4 $13