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Retirement Plans
 6 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Retirement Plans
11. Retirement Plans

Adient maintains non-contributory defined benefit pension plans covering primarily non-U.S. employees and a limited number of U.S. employees. The following table contains the components of net periodic benefit cost:
 
 
Three Months Ended
March 31,
 
Six Months Ended
March 31,
(in millions)
 
2019
 
2018
 
2019
 
2018
Service cost
 
$
2

 
$
2

 
$
4

 
$
4

Interest cost
 
3

 
3

 
6

 
7

Expected return on plan assets
 
(3
)
 
(4
)
 
(8
)
 
(9
)
Settlement (gain) loss
 
—

 
(6
)
 
—

 
(6
)
Net periodic benefit cost
 
$
2

 
$
(5
)
 
$
2

 
$
(4
)


The interest cost, expected return on plan assets and settlement (gain) loss components of net periodic benefit cost are included in other pension expense (income) in the consolidated statements of income (loss).