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Employee Benefit Plans
3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Employee Benefit Plans 15. Employee Benefit Plans
Pension and Other Postretirement Benefit Plans
Certain subsidiaries of MetLife, Inc. sponsor a U.S. qualified and various U.S. and non-U.S. nonqualified defined benefit pension plans covering employees who meet specified eligibility requirements. These subsidiaries also provide certain postemployment benefits and certain postretirement medical and life insurance benefits for U.S. and non-U.S. retired employees.
The components of net periodic benefit costs, reported in other expenses, were as follows:
Three Months
Ended
March 31,
20232022
Pension
Benefits
Other
Postretirement
Benefits
Pension
Benefits
Other
Postretirement
Benefits
(In millions)
Service costs
$38 $$52 $
Interest costs
118 11 81 
Expected return on plan assets
(120)(13)(129)(13)
Amortization of net actuarial (gains) losses
39 (8)31 (6)
Amortization of prior service costs (credit)
(3)— (3)— 
Net periodic benefit costs (credit)
$72 $(9)$32 $(10)