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Benefit Plans
 9 Months Ended
Sep. 30, 2016
Benefit Plans
Benefit Plans
Components of net periodic benefit cost for our pension plans for the three and nine months ended September 30, 2016 and September 26, 2015 were as follows:
 
U.S. pension plans
 
Three months ended
 
Nine months ended
In millions
September 30,
2016
September 26,
2015
 
September 30,
2016
September 26,
2015
Service cost
$
2.8

$
3.5

 
$
8.4

$
10.5

Interest cost
4.1

3.7

 
12.3

11.1

Expected return on plan assets
(2.9
)
(2.5
)
 
(8.6
)
(7.5
)
Net periodic benefit cost
$
4.0

$
4.7

 
$
12.1

$
14.1

 
Non-U.S. pension plans
 
Three months ended
 
Nine months ended
In millions
September 30,
2016
September 26,
2015
 
September 30,
2016
September 26,
2015
Service cost
$
2.1

$
2.1

 
$
6.2

$
6.3

Interest cost
1.1

1.1

 
3.3

3.3

Expected return on plan assets
(0.4
)
(0.4
)
 
(1.2
)
(1.2
)
Net periodic benefit cost
$
2.8

$
2.8

 
$
8.3

$
8.4


Components of net periodic benefit cost for our other post-retirement plans for the three and nine months ended September 30, 2016 and September 26, 2015 were not material.