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9. EMPLOYEE BENEFIT PLANS
ÌýÌýÌýÌýÌýÌýÌýÌýComponents of the net periodic benefit costs for the three months ended MarchÌý31, 2016 and 2015 were as follows (dollars in millions):
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|
Ìý
|
Ìý
|
Defined
Benefit Plans
|
Ìý
|
Other
Postretirement
Benefit Plans
|
Ìý
|
|
Ìý
|
Ìý
|
Three months
ended
MarchÌý31,
|
Ìý
|
Three months
ended
MarchÌý31,
|
Ìý
|
|
Ìý
|
Ìý
|
2016
|
Ìý
|
2015
|
Ìý
|
2016
|
Ìý
|
2015
|
Ìý
|
|
Service cost
|
Ìý
|
$
|
16
|
Ìý
|
$
|
19
|
Ìý
|
$
|
1
|
Ìý
|
$
|
1
|
Ìý
|
|
Interest cost
|
Ìý
|
Ìý
|
30
|
Ìý
|
Ìý
|
31
|
Ìý
|
Ìý
|
1
|
Ìý
|
Ìý
|
1
|
Ìý
|
|
Expected return on assets
|
Ìý
|
Ìý
|
(47
|
)
|
Ìý
|
(51
|
)
|
Ìý
|
�
|
Ìý
|
Ìý
|
�
|
Ìý
|
|
Amortization of prior service benefit
|
Ìý
|
Ìý
|
(2
|
)
|
Ìý
|
(2
|
)
|
Ìý
|
(2
|
)
|
Ìý
|
(1
|
)
|
|
Amortization of actuarial loss
|
Ìý
|
Ìý
|
16
|
Ìý
|
Ìý
|
19
|
Ìý
|
Ìý
|
1
|
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|
1
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Net periodic benefit cost
|
Ìý
|
$
|
13
|
Ìý
|
$
|
16
|
Ìý
|
$
|
1
|
Ìý
|
$
|
2
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|
Ìý
|
Ìý
|
Defined
Benefit Plans
|
Ìý
|
Other
Postretirement
Benefit Plans
|
Ìý
|
|
Ìý
|
Ìý
|
Three months
ended
MarchÌý31,
|
Ìý
|
Three months
ended
MarchÌý31,
|
Ìý
|
|
Ìý
|
Ìý
|
2016
|
Ìý
|
2015
|
Ìý
|
2016
|
Ìý
|
2015
|
Ìý
|
|
Service cost
|
Ìý
|
$
|
16
|
Ìý
|
$
|
19
|
Ìý
|
$
|
1
|
Ìý
|
$
|
1
|
Ìý
|
|
Interest cost
|
Ìý
|
Ìý
|
30
|
Ìý
|
Ìý
|
31
|
Ìý
|
Ìý
|
1
|
Ìý
|
Ìý
|
1
|
Ìý
|
|
Expected return on assets
|
Ìý
|
Ìý
|
(47
|
)
|
Ìý
|
(51
|
)
|
Ìý
|
�
|
Ìý
|
Ìý
|
�
|
Ìý
|
|
Amortization of prior service benefit
|
Ìý
|
Ìý
|
(2
|
)
|
Ìý
|
(2
|
)
|
Ìý
|
(2
|
)
|
Ìý
|
(1
|
)
|
|
Amortization of actuarial loss
|
Ìý
|
Ìý
|
18
|
Ìý
|
Ìý
|
21
|
Ìý
|
Ìý
|
1
|
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|
1
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Net periodic benefit cost
|
Ìý
|
$
|
15
|
Ìý
|
$
|
18
|
Ìý
|
$
|
1
|
Ìý
|
$
|
2
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ÌýÌýÌýÌýÌýÌýÌýÌýDuring the three months ended MarchÌý31, 2016 and 2015, we made contributions to our pension and other postretirement benefit plans of $20Ìýmillion and $33Ìýmillion, respectively. During the remainder of 2016, we expect to contribute an additional amount of approximately $55Ìýmillion to these plans.
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