Pension benefits

Other postretirement
benefits

(In millions)

2024

2023

2024

2023

Three months ended March 31

Service cost

$

1

$

1

$

—

$

—

Interest cost

2

3

1

1

Expected return on plan assets

(1

)

(2

)

—

—

Total net periodic benefit costs

$

2

$

2

$

1

$

1

Six months ended March 31

Service cost

$

1

$

2

$

—

$

—

Interest cost

7

6

1

1

Expected return on plan assets

(4

)

(4

)

—

—

Total net periodic benefit costs

$

4

$

4

$

1

$

1