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Retirement Plans
 9 Months Ended
Jun. 27, 2014
Compensation and Retirement Disclosure [Abstract]  
Retirement Plans
12.
Retirement Plans
The net periodic benefit cost for the Company's defined benefit pension plans was as follows:
 
Three Months Ended
 
Nine Months Ended
 
June 27,
2014
 
June 28,
2013
 
June 27,
2014
 
June 28,
2013
Service cost
$
1.3


$
1.2

 
$
3.8

 
$
3.6

Interest cost
4.9


4.6

 
14.8

 
13.7

Expected return on plan assets
(6.1
)

(7.4
)
 
(18.3
)
 
(22.1
)
Amortization of net actuarial loss
2.2


3.0

 
6.4

 
9.0

Amortization of prior service (credit) cost
(0.2
)

0.1

 
(0.5
)
 
0.4

Plan settlements
2.6

 
5.4

 
2.9

 
5.4

Net periodic benefit cost
$
4.7


$
6.9

 
$
9.1

 
$
10.0



The net periodic benefit credit for the Company's postretirement benefit pension plans for the three months ended June 27, 2014 and June 28, 2013 was $1.7 million and $1.6 million, respectively, and $5.3 million and $4.7 million for the nine months ended June 27, 2014 and June 28, 2013, respectively. The components of the credit were not material.
During the nine months ended June 28, 2013, Covidien made a $37.5 million voluntary contribution to the Company's pension plans. The Company may elect to make voluntary contributions to its defined benefit pension plans or its postretirement benefit plans during fiscal 2014.