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Post-retirement Benefit Plans
 3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Post-retirement Benefit Plans Post-retirement Benefit Plans
The components of net periodic benefit cost for our defined benefit pension plans are as follows:
Three Months Ended
 March 31,
(in millions)20232022
Domestic defined benefit pension plans:
Service cost$1 $1 
Interest cost1 1 
Expected return on plan assets(1)(2)
Amortization of net actuarial loss— 1 
Net periodic benefit cost$1 $1 
International defined benefit pension plans:
Service cost$2 $3 
Interest cost4 4 
Expected return on plan assets(3)(4)
Amortization of actuarial (gain) loss(1)3 
Net periodic benefit cost$2 $6 
Total net periodic benefit cost$3 $7 
The components of net periodic benefit cost, other than the service cost component are included in the line item "Other non-operating income, net" in the Condensed Consolidated Income Statements.
The total net periodic benefit cost for other post-retirement employee benefit plans was less than $1 million, including net credits recognized into "Other comprehensive income (loss)" of less than $1 million, for both the three months ended March 31, 2023 and 2022, respectively.
We contributed $5 million to our defined benefit plans for the three months ended March 31, 2023 and 2022. Additional contributions ranging between approximately $14 million and $18 million are expected to be made during the remainder of 2023.