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Pension and Postretirement Plans
 9 Months Ended
Jun. 30, 2018
Defined Benefit Plan [Abstract]  
Pension and Postretirement Plans
Pension and Postretirement Plans

The components of the Company’s net periodic benefit costs from continuing operations associated with its defined benefit pension and postretirement plans are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions):
 
U.S. Pension Plans
 
Three Months Ended
June 30,
 
Nine Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
 
Service cost
$
4

 
$
4

 
$
11

 
$
13

Interest cost
27

 
28

 
80

 
85

Expected return on plan assets
(58
)
 
(57
)
 
(172
)
 
(174
)
Net actuarial (gain) loss
—

 
45

 
—

 
(90
)
Settlement (gain) loss
—

 
1

 
—

 
(8
)
Net periodic benefit cost (credit)
$
(27
)
 
$
21

 
$
(81
)
 
$
(174
)


 
Non-U.S. Pension Plans
 
Three Months Ended
June 30,
 
Nine Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
 
Service cost
$
6

 
$
8

 
$
18

 
$
24

Interest cost
14

 
13

 
43

 
36

Expected return on plan assets
(29
)
 
(23
)
 
(87
)
 
(68
)
Net periodic benefit credit
$
(9
)
 
$
(2
)
 
$
(26
)
 
$
(8
)

 
Postretirement Benefits
 
Three Months Ended
June 30,
 
Nine Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
 
Service cost
$
—

 
$
—

 
$
1

 
$
1

Interest cost
2

 
1

 
5

 
4

Expected return on plan assets
(2
)
 
(2
)
 
(7
)
 
(7
)
Net periodic benefit credit
$
—

 
$
(1
)
 
$
(1
)
 
$
(2
)

During the three and nine months ended June 30, 2017, the amount of lump sum payouts triggered a remeasurement event for certain U.S. pension plans resulting in the recognition of net actuarial (gains) losses of $45 million and $(90) million, respectively.