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Retirement Plans
 9 Months Ended
Jun. 28, 2013
Compensation and Retirement Disclosure [Abstract]  
Retirement Plans
9.
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 28,
2013
 
June 29,
2012
 
June 28,
2013
 
June 29,
2012
Service cost
$
1.2


$
1.3


$
3.6


$
3.9

Interest cost
4.6


5.4


13.7


16.1

Expected return on plan assets
(7.4
)

(6.2
)

(22.1
)

(18.5
)
Amortization of net actuarial loss
3.0


2.9


9.0


8.7

Amortization of prior service cost
0.1


0.2


0.4


0.5

Plan settlements loss
5.4

 
—

 
5.4

 
—

Net periodic benefit cost
$
6.9


$
3.6


$
10.0


$
10.7



During the nine months ended June 28, 2013, Covidien made a $37.5 million voluntary contribution to the Company's pension plans. The Company does not currently expect to make any further contributions during fiscal 2013.
The net periodic benefit credit for postretirement benefit plans for the three months ended June 28, 2013 and June 29, 2012 was $1.6 million and $1.5 million, respectively, and for the nine months ended June 28, 2013 and June 29, 2012 was $4.7 million and $4.4 million, respectively. The components of the credit were not material.